/* ============================================================
   BCK ACADEMY — style.css
   Theme: Dark Tech / Orange Accent (inspired by 01.jpg)
   Fonts: Inter (headings) + Be Vietnam Pro (body)
   ============================================================ */

/* ── DESIGN TOKENS ── */
:root {
  /* Backgrounds — deep dark navy like 01.jpg */
  --c-bg:        #0b1120;
  --c-bg-2:      #0f1729;
  --c-bg-card:   #131e30;
  --c-border:    rgba(255,255,255,0.07);
  --c-border-2:  rgba(255,255,255,0.13);

  /* Primary accent: orange (01.jpg Hooks / Tips color) */
  --c-orange:    #f97316;
  --c-orange-dk: #ea580c;
  --c-amber:     #f59e0b;

  /* Secondary accents (match 01.jpg module colors) */
  --c-cyan:      #06b6d4;
  --c-violet:    #8b5cf6;
  --c-green:     #10b981;
  --c-pink:      #ec4899;

  /* Keep a blue for subtle use */
  --c-blue:      #3b82f6;
  --c-accent:    #f97316;

  /* Text */
  --c-text:      #f1f5f9;
  --c-text-2:    #94a3b8;
  --c-text-3:    #64748b;
  --c-white:     #ffffff;

  /* Gradients */
  --grad-ai:     linear-gradient(135deg, #f97316 0%, #f59e0b 100%);
  --grad-hero:   linear-gradient(135deg, #0d1828 0%, #0b1120 60%, #0e1425 100%);
  --grad-cta:    linear-gradient(135deg, #ea580c 0%, #f59e0b 100%);

  /* Radii */
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;
  --radius-xl:   32px;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0,0,0,0.45), 0 1px 4px rgba(0,0,0,0.2);
  --shadow-glow: 0 0 40px rgba(249,115,22,0.2);

  /* Typography */
  --font-head:   'Inter', sans-serif;
  --font-body:   'Be Vietnam Pro', sans-serif;

  --transition:  0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── LAYOUT ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 96px 0; }

/* ── TYPOGRAPHY HELPERS ── */
.highlight {
  background: var(--grad-ai);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Section label — pill badge, orange border like 01.jpg label style */
.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-orange);
  border: 1px solid rgba(249,115,22,0.35);
  background: rgba(249,115,22,0.08);
  padding: 5px 14px;
  border-radius: 99px;
  margin-bottom: 20px;
}

/* Section title with left orange bar — signature from 01.jpg */
.section-title {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  padding-left: 18px;
  border-left: 4px solid var(--c-orange);
}
.section-sub {
  font-size: 1.05rem;
  color: var(--c-text-2);
  max-width: 560px;
  margin-bottom: 56px;
  padding-left: 18px;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
}
.btn-primary {
  background: var(--grad-ai);
  color: #fff;
  border: none;
  box-shadow: 0 4px 20px rgba(249,115,22,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(249,115,22,0.5);
}
.btn-outline {
  background: transparent;
  color: var(--c-text);
  border: 1.5px solid var(--c-border-2);
}
.btn-outline:hover {
  border-color: var(--c-orange);
  color: var(--c-orange);
  transform: translateY(-2px);
}
.btn-white {
  background: var(--c-white);
  color: var(--c-bg);
  border: none;
  font-weight: 700;
}
.btn-white:hover {
  background: #f1f5f9;
  transform: translateY(-2px);
}
.btn-outline-white {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.5);
}
.btn-outline-white:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}
.btn-sm  { padding: 9px 18px; font-size: 0.875rem; }
.btn-lg  { padding: 15px 32px; font-size: 1rem; }
.btn-link {
  color: var(--c-orange);
  font-weight: 600;
  font-size: 0.9rem;
  transition: color var(--transition);
}
.btn-link:hover { color: var(--c-amber); }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background var(--transition), backdrop-filter var(--transition), border-bottom var(--transition);
}
.site-header.scrolled {
  background: rgba(11,17,32,0.95);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-border);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.logo {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.logo-bck {
  background: var(--grad-ai);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-academy { color: var(--c-text); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a:not(.btn) {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-text-2);
  transition: color var(--transition);
}
.nav-links a:not(.btn):hover { color: var(--c-text); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding-top: 70px;
  background: var(--grad-hero);
}

/* Dot grid like 01.jpg background */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(249,115,22,0.12) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  opacity: 0.6;
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}
.hero-glow-1 {
  width: 600px; height: 600px;
  background: rgba(249,115,22,0.1);
  top: -200px; left: -100px;
}
.hero-glow-2 {
  width: 500px; height: 500px;
  background: rgba(245,158,11,0.08);
  bottom: -150px; right: -100px;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 80px 24px;
  position: relative;
  z-index: 1;
}

/* Badge — spaced uppercase like 01.jpg "LEARNING PATH" label */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-orange);
  background: rgba(249,115,22,0.1);
  border: 1px solid rgba(249,115,22,0.3);
  padding: 6px 16px;
  border-radius: 99px;
  margin-bottom: 24px;
}
.badge-dot {
  width: 7px; height: 7px;
  background: var(--c-orange);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}
.hero-title {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3.5vw, 3rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
}
.hero-title .highlight {
  white-space: nowrap;
}
.title-line {
  display: block;
  white-space: nowrap;
}
.hero-desc {
  font-size: 1.05rem;
  color: var(--c-text-2);
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 40px;
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 800;
  background: var(--grad-ai);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--c-text-3);
  font-weight: 500;
}
.stat-divider {
  width: 1px; height: 40px;
  background: var(--c-border-2);
}
.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-viz {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

/* Central orb */
.hero-orb {
  position: relative;
  width: 180px; height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Hex grid background */
.orb-hex-bg {
  position: absolute;
  width: 260px; height: 260px;
  border-radius: 50%;
  background-image:
    repeating-linear-gradient(0deg,   transparent, transparent 18px, rgba(249,115,22,0.04) 18px, rgba(249,115,22,0.04) 19px),
    repeating-linear-gradient(60deg,  transparent, transparent 18px, rgba(249,115,22,0.04) 18px, rgba(249,115,22,0.04) 19px),
    repeating-linear-gradient(120deg, transparent, transparent 18px, rgba(249,115,22,0.04) 18px, rgba(249,115,22,0.04) 19px);
  opacity: 0.6;
  z-index: 0;
}

/* Radar sweep */
.orb-radar {
  position: absolute;
  width: 170px; height: 170px;
  border-radius: 50%;
  background: conic-gradient(
    rgba(249,115,22,0.35) 0deg,
    rgba(249,115,22,0.08) 60deg,
    transparent 80deg,
    transparent 360deg
  );
  animation: spin 3s linear infinite;
  z-index: 1;
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.orb-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(249,115,22,0.25);
}
.orb-ring-1 {
  width: 100px; height: 100px;
  border-color: rgba(249,115,22,0.5);
  border-top-color: transparent;
  animation: spin 3s linear infinite;
}
.orb-ring-2 {
  width: 130px; height: 130px;
  border-color: rgba(245,158,11,0.3);
  border-bottom-color: transparent;
  animation: spin 6s linear infinite reverse;
}
.orb-ring-3 {
  width: 160px; height: 160px;
  border-color: rgba(249,115,22,0.12);
  border-left-color: rgba(249,115,22,0.4);
  animation: spin 10s linear infinite;
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Orbiting dots */
.orb-dot-track {
  position: absolute;
  border-radius: 50%;
  animation: spin linear infinite;
}
.orb-track-1 { width: 120px; height: 120px; animation-duration: 4s; }
.orb-track-2 { width: 155px; height: 155px; animation-duration: 7s; animation-direction: reverse; }
.orb-dot {
  position: absolute;
  width: 7px; height: 7px;
  background: var(--c-orange);
  border-radius: 50%;
  top: -3.5px; left: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 8px rgba(249,115,22,0.9), 0 0 16px rgba(249,115,22,0.4);
}
.orb-dot-amber {
  background: var(--c-amber);
  box-shadow: 0 0 8px rgba(245,158,11,0.9), 0 0 16px rgba(245,158,11,0.4);
  width: 5px; height: 5px;
}

/* Scan line on orb core */
.orb-scan-line {
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.7), transparent);
  animation: scan-sweep 2.5s ease-in-out infinite;
  border-radius: 99px;
}
@keyframes scan-sweep {
  0%   { top: 20%; opacity: 0; }
  20%  { opacity: 1; }
  80%  { opacity: 1; }
  100% { top: 80%; opacity: 0; }
}

/* Pulse glow behind orb */
.orb-pulse {
  position: absolute;
  width: 80px; height: 80px;
  border-radius: 50%;
  background: rgba(249,115,22,0.25);
  animation: pulse-orb 2.5s ease-in-out infinite;
  z-index: 0;
}
@keyframes pulse-orb {
  0%, 100% { transform: scale(1);   opacity: 0.5; }
  50%       { transform: scale(1.6); opacity: 0; }
}

.orb-core {
  position: relative;
  background: var(--grad-ai);
  width: 72px; height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 32px rgba(249,115,22,0.6), 0 0 64px rgba(249,115,22,0.2);
  z-index: 2;
}
.orb-label {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.05em;
  animation: glitch 5s ease-in-out infinite;
  position: relative;
  z-index: 1;
}
@keyframes glitch {
  0%, 90%, 100% { text-shadow: none; transform: none; }
  92% { text-shadow: 2px 0 rgba(249,115,22,0.8), -2px 0 rgba(245,158,11,0.6); transform: translateX(1px); }
  94% { text-shadow: -2px 0 rgba(249,115,22,0.8), 2px 0 rgba(245,158,11,0.6); transform: translateX(-1px); }
  96% { text-shadow: none; transform: none; }
}

/* Industry tag grid */
.ind-tags {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
  max-width: 360px;
}
.ind-tag {
  display: flex;
  align-items: center;
  gap: 7px;
  background: rgba(13,21,37,0.85);
  border: 1px solid var(--c-border);
  border-left: 2px solid var(--c-orange);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 0.7rem;
  font-weight: 600;
  color: rgba(255,255,255,0.8);
  backdrop-filter: blur(8px);
  transition: border-color 0.25s, color 0.25s, transform 0.25s;
  cursor: default;
}
.ind-tag span { font-size: 1rem; line-height: 1; }
.ind-tag:hover {
  border-color: rgba(249,115,22,0.5);
  border-left-color: var(--c-amber);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(249,115,22,0.15), 0 0 0 1px rgba(249,115,22,0.1);
}
.ind-tag:nth-child(1) { animation: tag-in 0.5s ease both 0.1s; }
.ind-tag:nth-child(2) { animation: tag-in 0.5s ease both 0.2s; }
.ind-tag:nth-child(3) { animation: tag-in 0.5s ease both 0.3s; }
.ind-tag:nth-child(4) { animation: tag-in 0.5s ease both 0.4s; }
.ind-tag:nth-child(5) { animation: tag-in 0.5s ease both 0.5s; }
.ind-tag:nth-child(6) { animation: tag-in 0.5s ease both 0.6s; }
@keyframes tag-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Binary data stream particles */
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.hp {
  position: absolute;
  font-family: 'Courier New', monospace;
  font-size: 0.65rem;
  font-weight: 700;
  color: rgba(249,115,22,0.25);
  letter-spacing: 0.05em;
  animation: drift linear infinite;
}
.hp-1 { left: 8%;  top: 20%; animation-duration: 5s;   animation-delay: 0s; }
.hp-2 { left: 85%; top: 15%; animation-duration: 6.5s; animation-delay: 1s; }
.hp-3 { left: 15%; top: 75%; animation-duration: 4.5s; animation-delay: 2s; }
.hp-4 { left: 78%; top: 65%; animation-duration: 7s;   animation-delay: 0.5s; }
.hp-5 { left: 50%; top: 5%;  animation-duration: 5.5s; animation-delay: 1.5s; color: rgba(249,115,22,0.4); }
@keyframes drift {
  0%   { opacity: 0;   transform: translateY(0) scale(0.8); }
  20%  { opacity: 1; }
  80%  { opacity: 0.6; }
  100% { opacity: 0;   transform: translateY(-40px) scale(1.1); }
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: var(--c-text-3);
  font-size: 0.78rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
}
.scroll-arrow {
  width: 20px; height: 20px;
  border-right: 2px solid var(--c-text-3);
  border-bottom: 2px solid var(--c-text-3);
  transform: rotate(45deg);
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50% { transform: rotate(45deg) translateY(4px); }
}

/* ============================================================
   PARTNERS SECTION
   ============================================================ */
/* ============================================================
   OFFLINE TRAINING — PDF slide layout
   ============================================================ */
.offline-section { background: var(--c-bg); }

.offline-slides {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 48px;
}

.offline-slide {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
  border-top: 3px solid var(--c-orange);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  transition: box-shadow var(--transition), transform var(--transition);
}
.offline-slide:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 56px rgba(0,0,0,0.5), 0 0 0 1px rgba(249,115,22,0.12);
}

/* ── Title bar ── */
.offline-slide-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--c-bg-card);
  padding: 14px 22px;
  gap: 16px;
  border-bottom: 1px solid var(--c-border);
}
.offline-slide-title {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.01em;
  margin: 0;
  line-height: 1.2;
}
.offline-slide-badge {
  flex-shrink: 0;
  font-size: 0.65rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--c-orange) 0%, var(--c-amber) 100%);
  color: #fff;
  padding: 5px 14px;
  border-radius: 99px;
  white-space: nowrap;
}

/* ── Client row ── */
.offline-slide-subbar {
  display: flex;
  align-items: center;
  background: var(--c-bg);
  padding: 7px 22px;
  border-bottom: 1px solid var(--c-border);
  border-top: 1px solid rgba(249,115,22,0.08);
  gap: 8px;
}
.offline-slide-subbar span {
  font-size: 0.76rem;
  color: var(--c-muted);
}
.offline-slide-subbar strong {
  color: var(--c-orange);
  font-weight: 600;
}

/* ── Photo area: 1 large (16:9) + 2×2 grid (4:3) ── */
.offline-slide-photos {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 0;
  background: var(--c-bg);
  padding: 10px;
  gap: 8px;
}
.offline-slide-main {
  overflow: hidden;
  border-radius: 8px;
  aspect-ratio: 16/9;
  border: 1px solid rgba(249,115,22,0.15);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04);
}
.offline-slide-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(1.05) saturate(1.05);
  transition: transform 0.5s ease;
}
.offline-slide:hover .offline-slide-main img { transform: scale(1.03); }

.offline-slide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 6px;
  border-left: 2px solid rgba(249,115,22,0.25);
  padding-left: 8px;
}
.offline-slide-grid img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.06);
  filter: brightness(1.03) saturate(1.03);
  transition: transform 0.4s ease;
}
.offline-slide:hover .offline-slide-grid img { transform: scale(1.04); }

/* Vertical divider between main and grid */
.offline-slide-photos::before {
  content: '';
  display: none;
}

@media (max-width: 640px) {
  .offline-slide-photos       { grid-template-columns: 1fr; }
  .offline-slide-grid         { grid-template-columns: repeat(4,1fr); grid-template-rows: 1fr; }
  .offline-slide-main         { aspect-ratio: 4/3; }
  .offline-slide-title        { font-size: 0.88rem; }
}

/* ============================================================
   PARTNER LOGO CHIPS
   ============================================================ */
.partner-logos-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 36px;
}
.partner-logo-chip {
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: 99px;
  padding: 8px 20px;
  transition: border-color var(--transition), color var(--transition);
}
.partner-logo-chip:hover {
  border-color: rgba(249,115,22,0.5);
  color: var(--c-orange);
}

.partners-section {
  background: var(--c-bg);
}

/* ── Partner logo grid ── */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  margin-top: 48px;
}

/* ── Partner image ── */
.partner-img-wrap {
  margin-top: 40px;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-top: 3px solid var(--c-orange);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.partner-img-wrap:hover {
  border-color: var(--c-orange);
  box-shadow: 0 20px 56px rgba(0,0,0,0.5), 0 0 0 1px rgba(249,115,22,0.15);
  transform: translateY(-3px);
}
.partner-img-wrap img {
  width: 100%;
  display: block;
  filter: brightness(0.95) saturate(0.9);
  transition: filter 0.4s ease, transform 0.5s ease;
}
.partner-img-wrap:hover img {
  filter: brightness(1) saturate(1);
  transform: scale(1.01);
}

/* ============================================================
   CREDENTIALS
   ============================================================ */
.credentials { background: var(--c-bg); }
.cred-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 56px;
}

/* Card with colored top bar — key pattern from 01.jpg */
.cred-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 36px 28px 32px;
  border-top: 3px solid var(--c-orange);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.cred-card:hover {
  border-color: var(--c-orange);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.4), 0 0 0 1px rgba(249,115,22,0.15);
}
.cred-num {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 900;
  background: var(--grad-ai);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}
.cred-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--c-text);
}
.cred-card p { font-size: 0.9rem; color: var(--c-text-2); line-height: 1.7; }

/* ============================================================
   COURSES — color-coded top bars like 01.jpg modules
   ============================================================ */
.courses { background: var(--c-bg-2); }

/* ── Category tabs ── */
.course-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.course-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 99px;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--c-text-2);
  background: var(--c-bg-card);
  border: 1.5px solid var(--c-border);
  cursor: pointer;
  transition: all var(--transition);
}
.course-tab:hover {
  color: var(--c-text);
  border-color: var(--c-border-2);
}
.course-tab.active {
  background: var(--grad-ai);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(249,115,22,0.3);
}
.tab-count {
  background: rgba(255,255,255,0.2);
  border-radius: 99px;
  padding: 1px 8px;
  font-size: 0.75rem;
}
.course-tab:not(.active) .tab-count {
  background: rgba(255,255,255,0.08);
}

/* ── Grid ── */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ── Card ── */
.course-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  border-top: 3px solid var(--c-orange);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.course-card[data-category="ai"]  { border-top-color: var(--c-orange); }
.course-card[data-category="ecom"]{ border-top-color: var(--c-cyan); }

.course-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 48px rgba(0,0,0,0.45);
}
.course-card[data-category="ai"]:hover  { border-color: var(--c-orange); box-shadow: 0 20px 48px rgba(0,0,0,0.4), 0 0 0 1px rgba(249,115,22,0.15); }
.course-card[data-category="ecom"]:hover{ border-color: var(--c-cyan);   box-shadow: 0 20px 48px rgba(0,0,0,0.4), 0 0 0 1px rgba(6,182,212,0.15); }

/* ── Coaching 1-1 card ── */
.course-card[data-category="coaching"] { border-top-color: var(--c-amber); }
.course-card[data-category="coaching"]:hover {
  border-color: var(--c-amber);
  box-shadow: 0 20px 48px rgba(0,0,0,0.4), 0 0 0 1px rgba(245,158,11,0.25), 0 0 32px rgba(245,158,11,0.1);
}

/* Banner coaching — ảnh giảng viên + overlay */
.coaching-banner {
  aspect-ratio: 16/9;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  background: #0d1525;
}
.coaching-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.5s ease;
  display: block !important;
}
.course-card:hover .coaching-photo { transform: scale(1.04); }

/* Gradient overlay: tối trái/dưới để chữ dễ đọc, sáng phải để thấy mặt */
.coaching-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right,  rgba(9,15,28,0.82) 0%, rgba(9,15,28,0.3) 55%, transparent 100%),
    linear-gradient(to top,    rgba(9,15,28,0.75) 0%, transparent 55%);
  z-index: 1;
}

/* Chữ nổi trên ảnh */
.coaching-banner-text-wrap {
  position: absolute;
  bottom: 14px; left: 14px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.coaching-exclusive-tag {
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-amber);
  background: rgba(245,158,11,0.18);
  border: 1px solid rgba(245,158,11,0.45);
  padding: 2px 8px;
  border-radius: 99px;
  width: fit-content;
}
.coaching-title-banner {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fde68a 0%, #f97316 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}
.coaching-sub-banner {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.8);
  font-weight: 600;
  letter-spacing: 0.04em;
}
.coaching-badge-wrap {
  position: absolute;
  top: 10px; left: 10px;
  z-index: 2;
}
.coaching-slots {
  font-size: 0.68rem;
  font-weight: 700;
  background: rgba(249,115,22,0.92);
  color: #fff;
  padding: 4px 10px;
  border-radius: 99px;
  backdrop-filter: blur(4px);
  animation: pulse-dot 2s infinite;
}

/* Cat tag & CTA cho coaching */
.coaching-tag-pill {
  background: rgba(245,158,11,0.12) !important;
  color: var(--c-amber) !important;
  border-color: rgba(245,158,11,0.3) !important;
}
.coaching-cta {
  background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%) !important;
  box-shadow: 0 4px 20px rgba(245,158,11,0.4) !important;
}
.coaching-cta:hover {
  box-shadow: 0 8px 32px rgba(245,158,11,0.6) !important;
}

/* Tab coaching */
.coaching-tab { border-color: rgba(245,158,11,0.3) !important; }
.coaching-tab.active, .coaching-tab:hover {
  background: rgba(245,158,11,0.15) !important;
  color: var(--c-amber) !important;
  border-color: var(--c-amber) !important;
}

/* hidden when filtered */
.course-card.hidden {
  display: none;
}

/* ── Banner image ── */
.course-banner {
  margin: -24px -22px 0;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--c-bg);
}
.course-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.course-card:hover .course-banner img {
  transform: scale(1.04);
}

/* Category badge */
.course-cat-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 99px;
  width: fit-content;
}
.ai-tag {
  background: rgba(249,115,22,0.12);
  color: var(--c-orange);
  border: 1px solid rgba(249,115,22,0.3);
}
.ecom-tag {
  background: rgba(6,182,212,0.1);
  color: var(--c-cyan);
  border: 1px solid rgba(6,182,212,0.25);
}

/* Popular badge */
.course-tag-popular {
  position: absolute;
  top: 16px; left: 16px;
  font-size: 0.68rem;
  font-weight: 700;
  background: var(--grad-ai);
  color: #fff;
  padding: 3px 10px;
  border-radius: 99px;
}
.course-tag-popular--right {
  left: auto; right: 16px;
}

/* Header row: icon + rating/students */
.course-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 4px;
}
.course-icon { font-size: 2rem; line-height: 1; }
.course-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}
.course-rating {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--c-amber);
}
.course-students {
  font-size: 0.72rem;
  color: var(--c-text-3);
}

.course-title {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.35;
}
.course-desc { font-size: 0.85rem; color: var(--c-text-2); line-height: 1.7; flex-grow: 1; }

.course-benefits {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.course-benefits li {
  font-size: 0.83rem;
  color: var(--c-text-2);
  padding-left: 18px;
  position: relative;
}
.course-benefits li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--c-orange);
  font-weight: 700;
}
.course-card[data-category="ecom"] .course-benefits li::before {
  color: var(--c-cyan);
}
.course-footer {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 6px;
  flex-wrap: wrap;
}
.course-footer .btn {
  flex: 1;
  justify-content: center;
  text-align: center;
}

/* ============================================================
   BENEFITS
   ============================================================ */
.benefits { background: var(--c-bg); }
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.benefit-item {
  padding: 30px 26px;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-top: 3px solid transparent;
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition);
}
.benefit-item:nth-child(1) { border-top-color: var(--c-orange); }
.benefit-item:nth-child(2) { border-top-color: var(--c-amber); }
.benefit-item:nth-child(3) { border-top-color: var(--c-cyan); }
.benefit-item:nth-child(4) { border-top-color: var(--c-violet); }
.benefit-item:nth-child(5) { border-top-color: var(--c-green); }
.benefit-item:nth-child(6) { border-top-color: var(--c-pink); }
.benefit-item:hover {
  border-color: var(--c-orange);
  transform: translateY(-4px);
}
.benefit-icon {
  font-size: 1.9rem;
  margin-bottom: 14px;
  display: inline-block;
}
.benefit-item h4 {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--c-text);
}
.benefit-item p { font-size: 0.88rem; color: var(--c-text-2); line-height: 1.7; }

/* ============================================================
   PROCESS
   ============================================================ */
.process { background: var(--c-bg-2); }
.steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-top: 56px;
  flex-wrap: wrap;
}
.step {
  flex: 1;
  min-width: 200px;
  text-align: center;
  padding: 0 16px;
}
.step-num {
  font-family: var(--font-head);
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  background: var(--grad-ai);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  opacity: 0.75;
}
.step-content h4 {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--c-text);
}
.step-content p { font-size: 0.875rem; color: var(--c-text-2); line-height: 1.7; }
.step-arrow {
  font-size: 1.5rem;
  color: var(--c-orange);
  margin-top: 28px;
  flex-shrink: 0;
  opacity: 0.6;
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.testimonials { background: var(--c-bg); }
.testi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 56px;
}
.testi-card {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-top: 3px solid var(--c-orange);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color var(--transition), transform var(--transition);
}
.testi-card:hover {
  border-color: var(--c-orange);
  transform: translateY(-4px);
}
.testi-stars { color: var(--c-amber); letter-spacing: 2px; font-size: 0.9rem; }
.testi-text {
  font-size: 0.9rem;
  color: var(--c-text-2);
  line-height: 1.75;
  font-style: italic;
  flex-grow: 1;
}
.testi-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
}
.testi-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--grad-ai);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.85rem;
  color: #fff;
  flex-shrink: 0;
}
.testi-author strong { display: block; font-size: 0.9rem; font-weight: 700; color: var(--c-text); }
.testi-author span  { display: block; font-size: 0.78rem; color: var(--c-text-3); }

/* Enterprise testimonials */
.testi-card-enterprise {
  border-top-color: var(--c-amber);
  background: linear-gradient(135deg, rgba(245,158,11,0.06) 0%, var(--c-bg-card) 60%);
}
.testi-enterprise-badge {
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-amber);
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.3);
  padding: 3px 10px;
  border-radius: 99px;
  width: fit-content;
}
.testi-avatar-photo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center center;
  border: 2px solid rgba(245,158,11,0.5);
  flex-shrink: 0;
}

/* ============================================================
   INSTRUCTOR
   ============================================================ */
.instructor { background: var(--c-bg-2); }

.instructor-inner {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 72px;
  align-items: flex-start;
  margin-top: 48px;
}

/* ── Left column ── */
.instructor-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.instructor-photo-wrap {
  position: relative;
  display: inline-block;
}
.instructor-photo {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  border: 4px solid var(--c-orange);
  box-shadow: 0 0 0 6px rgba(249,115,22,0.12), 0 24px 48px rgba(0,0,0,0.4);
  display: block;
}
.udemy-badge {
  position: absolute;
  bottom: 8px;
  right: -8px;
  background: var(--grad-ai);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 99px;
  display: flex;
  align-items: center;
  gap: 5px;
  box-shadow: 0 4px 16px rgba(249,115,22,0.4);
  white-space: nowrap;
}

/* Stats row */
.instructor-stats {
  display: flex;
  align-items: stretch;
  gap: 0;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  width: 100%;
}
.ins-stat {
  flex: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.ins-stat-num {
  display: block;
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--grad-ai);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.ins-stat-label {
  display: block;
  font-size: 0.7rem;
  color: var(--c-text-3);
  font-weight: 500;
  margin-top: 2px;
}
.ins-stat-divider {
  width: 1px;
  height: 36px;
  background: var(--c-border-2);
  flex-shrink: 0;
}

/* Social buttons */
.instructor-socials {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}
.social-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-text-2);
  transition: all var(--transition);
}
.social-btn:hover {
  border-color: var(--c-orange);
  color: var(--c-orange);
  transform: translateX(4px);
}

/* ── Right column ── */
.instructor-name {
  font-family: var(--font-head);
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 4px;
}
.instructor-alias {
  font-size: 1rem;
  color: var(--c-text-3);
  font-weight: 500;
  margin-bottom: 10px;
}
.instructor-title {
  font-size: 0.9rem;
  color: var(--c-orange);
  font-weight: 600;
  margin-bottom: 20px;
  line-height: 1.5;
}
.instructor-bio {
  font-size: 0.95rem;
  color: var(--c-text-2);
  line-height: 1.85;
  margin-bottom: 16px;
}
.instructor-highlights {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  margin-top: 8px;
}
.instructor-highlights li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--c-text-2);
  line-height: 1.55;
}
.highlight-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 1px;
}
.instructor-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
  position: relative;
  overflow: hidden;
  background: var(--grad-cta);
  padding: 96px 0;
  text-align: center;
}
.cta-glow {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 800px;
  background: rgba(255,255,255,0.04);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.cta-inner { position: relative; z-index: 1; }
.cta-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.8);
  border: 1px solid rgba(255,255,255,0.3);
  padding: 5px 14px;
  border-radius: 99px;
  margin-bottom: 24px;
}
.cta-title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: 20px;
}
.cta-desc {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.8;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.cta-contacts {
  display: grid;
  grid-template-columns: repeat(2, auto);
  gap: 12px;
  justify-content: center;
  max-width: 560px;
  margin: 0 auto;
}
.contact-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.18);
  color: rgba(255,255,255,0.92);
  padding: 12px 22px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.contact-chip:hover {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.4);
  color: #fff;
  transform: translateY(-2px);
}
@media (max-width: 560px) {
  .cta-contacts { grid-template-columns: 1fr; max-width: 320px; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer-bottom {
  background: #080d18;
  border-top: 1px solid var(--c-border);
}

/* ── Main grid ── */
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1.2fr 1.4fr 1.6fr;
  gap: 48px;
  padding: 64px 24px 52px;
}

/* ── Brand column ── */
.footer-logo {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  display: inline-block;
  margin-bottom: 14px;
}
.footer-tagline {
  font-size: 0.875rem;
  color: var(--c-text-3);
  line-height: 1.75;
  margin-bottom: 24px;
  max-width: 270px;
}

/* Social icon buttons */
.footer-socials {
  display: flex;
  gap: 10px;
}
.footer-social-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-text-3);
  transition: all var(--transition);
}
.footer-social-icon:hover {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: #fff;
  transform: translateY(-3px);
}

/* ── Column heading ── */
.footer-heading {
  font-family: var(--font-head);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--c-text);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-border);
}

/* ── Nav links ── */
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.footer-links li a {
  font-size: 0.875rem;
  color: var(--c-text-3);
  transition: color var(--transition), padding-left var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-links li a::before {
  content: '';
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--c-border-2);
  flex-shrink: 0;
  transition: background var(--transition);
}
.footer-links li a:hover {
  color: var(--c-orange);
  padding-left: 4px;
}
.footer-links li a:hover::before {
  background: var(--c-orange);
}

/* ── Contact list ── */
.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 13px;
}
.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.fc-ic {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: rgba(249,115,22,0.1);
  border: 1px solid rgba(249,115,22,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-orange);
  flex-shrink: 0;
  margin-top: 1px;
}
.footer-contact-list li a {
  font-size: 0.85rem;
  color: var(--c-text-3);
  transition: color var(--transition);
  line-height: 1.5;
  word-break: break-all;
}
.footer-contact-list li a:hover { color: var(--c-orange); }

/* ── Udemy badge ── */
.footer-udemy-badge {
  margin-top: 24px;
  display: inline-block;
}
.footer-udemy-badge a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 22px 10px 16px;
  background: linear-gradient(135deg, rgba(249,115,22,0.12) 0%, rgba(15,25,45,0.6) 100%);
  border: 1px solid rgba(249,115,22,0.35);
  border-radius: 99px;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.footer-udemy-badge a::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(249,115,22,0.08) 50%, transparent 100%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}
.footer-udemy-badge a:hover::before { transform: translateX(100%); }
.footer-udemy-badge a:hover {
  border-color: rgba(249,115,22,0.7);
  box-shadow: 0 0 16px rgba(249,115,22,0.2);
}
.footer-udemy-badge img {
  filter: brightness(0) invert(1);
  opacity: 0.9;
}
.footer-udemy-badge span {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: linear-gradient(90deg, #f97316, #f59e0b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

/* ── Divider ── */
.footer-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-border) 20%, var(--c-border) 80%, transparent);
}

/* ── Bottom bar ── */
.footer-bottom-bar {
  padding: 20px 0;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom-bar p {
  font-size: 0.8rem;
  color: var(--c-text-3);
}
.footer-bottom-right {
  color: var(--c-text-3);
  font-size: 0.8rem;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 40px; padding: 48px 24px 40px; }
}
@media (max-width: 600px) {
  .footer-inner { grid-template-columns: 1fr; gap: 32px; padding: 40px 24px 32px; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .footer-tagline { max-width: 100%; }
}

/* ============================================================
   REGISTRATION MODAL
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}
.modal-box {
  position: relative;
  background: var(--c-bg-card);
  border-radius: 20px;
  border: 3px solid var(--c-orange);
  box-shadow: 0 24px 80px rgba(0,0,0,0.5), 0 0 0 6px rgba(249,115,22,0.1);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1);
}
.modal-overlay.open .modal-box {
  transform: translateY(0) scale(1);
}
.modal-close {
  position: absolute;
  top: 14px; right: 16px;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
  cursor: pointer;
  border: none;
}
.modal-close:hover { background: rgba(255,255,255,0.2); color: var(--c-white); }

/* Modal header */
.modal-header {
  background: linear-gradient(135deg, #f97316 0%, #f59e0b 100%);
  padding: 32px 32px 28px;
  border-radius: 17px 17px 0 0;
  text-align: center;
  color: #fff;
}
.modal-logo {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.modal-logo .logo-bck { color: #fde68a; }
.modal-logo .logo-academy { color: #fff; }
.modal-header h3 {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.modal-header p {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.82);
  line-height: 1.6;
}

/* Form body */
.reg-form {
  padding: 28px 32px 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--c-text-2);
  font-family: var(--font-body);
}
.form-group input,
.form-group select {
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1.5px solid var(--c-border-2);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 0.95rem;
  font-family: var(--font-body);
  color: var(--c-text);
  outline: none;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  appearance: none;
  -webkit-appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23f97316' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  color: var(--c-text);
}
/* Custom select dropdown */
.custom-select {
  position: relative;
  width: 100%;
  outline: none;
}
.custom-select__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1.5px solid var(--c-border-2);
  border-radius: 10px;
  padding: 13px 16px;
  cursor: pointer;
  color: var(--c-text-3);
  font-size: 0.97rem;
  font-family: var(--font-body);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.custom-select__trigger .custom-select__value.selected {
  color: var(--c-text);
}
.custom-select__arrow {
  flex-shrink: 0;
  margin-left: 8px;
  transition: transform 0.2s;
}
.custom-select.open .custom-select__trigger {
  border-color: var(--c-orange);
  background: rgba(255,255,255,0.09);
  box-shadow: 0 0 0 3px rgba(249,115,22,0.15);
}
.custom-select.open .custom-select__arrow {
  transform: rotate(180deg);
}
.custom-select.has-error .custom-select__trigger {
  border-color: #ef4444;
  background: rgba(239,68,68,0.08);
}
.custom-select__list {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  background: #0b1120;
  border: 1.5px solid var(--c-orange);
  border-radius: 10px;
  overflow: hidden;
  z-index: 100;
  list-style: none;
  margin: 0; padding: 4px 0;
  box-shadow: 0 8px 24px rgba(0,0,0,0.6);
}
.custom-select.open .custom-select__list { display: block; }
.custom-select__option {
  padding: 12px 16px;
  color: #ffffff;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.custom-select__option:last-child { border-bottom: none; }
.custom-select__option:hover,
.custom-select__option:focus {
  background: rgba(249,115,22,0.2);
  color: #ffffff;
}
.custom-select__option.selected {
  background: rgba(249,115,22,0.12);
  color: var(--c-orange);
  font-weight: 600;
}
.form-group input::placeholder { color: var(--c-text-3); }
.form-group input:focus,
.form-group select:focus {
  background: rgba(255,255,255,0.09);
  border-color: var(--c-orange);
  box-shadow: 0 0 0 3px rgba(249,115,22,0.15);
}
.form-group.has-error input,
.form-group.has-error select {
  border-color: #ef4444;
  background: rgba(239,68,68,0.08);
}
.form-error {
  font-size: 0.78rem;
  color: #ef4444;
  font-weight: 500;
  display: none;
}
.form-group.has-error .form-error { display: block; }

/* Checkbox */
.form-check-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.form-check-wrap.has-error .form-error { display: block; }
.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}
.form-checkbox input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0; height: 0;
}
.checkbox-box {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border: 2px solid var(--c-border-2);
  border-radius: 6px;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  margin-top: 1px;
}
.form-checkbox input:checked + .checkbox-box {
  background: var(--c-orange);
  border-color: var(--c-orange);
}
.form-checkbox input:checked + .checkbox-box::after {
  content: '';
  display: block;
  width: 5px; height: 9px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(45deg) translate(-1px, -1px);
}
.checkbox-label {
  font-size: 0.85rem;
  color: var(--c-text-3);
  line-height: 1.55;
}
.checkbox-label a { color: var(--c-orange); font-weight: 600; text-decoration: underline; }

/* Submit button */
.btn-submit {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
  color: #fff;
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 800;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 6px 24px rgba(249,115,22,0.4);
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
  letter-spacing: 0.03em;
}
.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(249,115,22,0.55);
}
.btn-submit:active { transform: translateY(0); }
.btn-submit:disabled { opacity: 0.65; cursor: not-allowed; transform: none; }

/* Success state */
.form-success {
  padding: 40px 32px;
  text-align: center;
}
.success-icon { font-size: 3rem; margin-bottom: 16px; }
.form-success h4 {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--c-text);
  margin-bottom: 12px;
}
.form-success p {
  font-size: 0.9rem;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-bottom: 24px;
}

@media (max-width: 520px) {
  .modal-box { border-radius: 16px; }
  .modal-header { padding: 24px 20px 20px; border-radius: 13px 13px 0 0; }
  .reg-form { padding: 24px 20px 24px; }
}

/* ============================================================
   FADE-IN ANIMATION
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
/* ── Tablet 1024px ── */
@media (max-width: 1024px) {
  .cred-grid { grid-template-columns: repeat(2, 1fr); }
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .testi-grid { grid-template-columns: repeat(2, 1fr); }

  /* Instructor: 1 cột, photo trên — text dưới */
  .instructor-inner { grid-template-columns: 1fr; gap: 36px; }
  .instructor-visual { align-items: center; }
  .instructor-stats { max-width: 400px; }
  .instructor-socials { max-width: 400px; }
  .instructor-name { font-size: 2rem; text-align: center; }
  .instructor-title { text-align: center; }
  .instructor-bio { text-align: left; }
  .instructor-cta { justify-content: center; }
}

/* ── Mobile 768px ── */
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-title { font-size: 1.7rem; padding-left: 12px; border-left-width: 3px; }
  .section-sub { padding-left: 12px; font-size: 0.9rem; margin-bottom: 36px; }

  /* Hero */
  .hero { justify-content: flex-start; min-height: auto; }
  .hero-scroll-hint { display: none; }
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 20px;
    padding: 32px 20px 52px;
  }
  .hero-badge { margin: 0 auto; margin-bottom: 14px; }
  .title-line { white-space: normal; }
  .hero-title { margin-bottom: 12px; }
  .hero-desc { margin: 0 auto; max-width: 480px; font-size: 0.92rem; margin-bottom: 20px; }

  /* Stats */
  .hero-stats { justify-content: center; gap: 0; margin-bottom: 24px; }
  .stat { min-width: 76px; }
  .stat-divider { height: 36px; }

  /* CTA — stack dọc, full width */
  .hero-cta { flex-direction: column; align-items: center; gap: 10px; }
  .hero-cta .btn-lg { width: 100%; max-width: 340px; justify-content: center; font-size: 0.95rem; padding: 14px 20px; }
  .hero-visual { display: none; }

  /* Nav mobile */
  .nav-links {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 70px; left: 0; right: 0;
    background: rgba(11,17,32,0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--c-border);
    padding: 24px;
    gap: 20px;
    text-align: center;
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }

  /* Grids */
  .cred-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 36px; }
  .courses-grid { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; gap: 14px; margin-top: 32px; }
  .testi-grid { grid-template-columns: 1fr; gap: 16px; margin-top: 32px; }
  .course-tabs { gap: 8px; flex-wrap: wrap; justify-content: center; margin-bottom: 28px; }
  .course-tab { padding: 7px 14px; font-size: 0.8rem; }

  /* Process */
  .steps { flex-direction: column; align-items: center; margin-top: 36px; }
  .step-arrow { transform: rotate(90deg); margin: 0; }
  .step { width: 100%; max-width: 360px; }

  /* Instructor mobile */
  .instructor-inner { gap: 28px; }
  .instructor-photo { width: 180px; height: 180px; }
  .instructor-name { font-size: 1.6rem; }
  .instructor-stats { padding: 14px 16px; }
  .ins-stat-num { font-size: 1.3rem; }
  .instructor-cta { flex-wrap: wrap; gap: 10px; }

  /* Coaching banner */
  .coaching-title-banner { font-size: 1.1rem; }
  .coaching-sub-banner { display: none; }
  .coaching-banner-text-wrap { max-width: 58%; }
  .coaching-overlay {
    background:
      linear-gradient(to right, rgba(9,15,28,0.88) 0%, rgba(9,15,28,0.5) 45%, transparent 70%),
      linear-gradient(to top, rgba(9,15,28,0.8) 0%, transparent 50%);
  }

  /* Partner grid */
  .partner-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 28px; }
  .partner-logos-row { gap: 8px; }
  .partner-logo-chip { font-size: 0.75rem; padding: 6px 14px; }

  /* Offline slides */
  .offline-slide-title { font-size: 0.9rem; }
  .offline-slide-bar { padding: 10px 14px; }

  /* Testimonials */
  .testi-card { padding: 20px 18px; }

  /* CTA section */
  .cta-section { padding: 64px 0; }
  .cta-title { font-size: 1.6rem; }
  .cta-desc { font-size: 0.92rem; margin-bottom: 28px; }
  .cta-buttons { flex-direction: column; align-items: center; gap: 12px; }
  .cta-buttons .btn-lg { width: 100%; max-width: 320px; text-align: center; justify-content: center; }

  /* Footer — stack to 1 column */
  .footer-inner { grid-template-columns: 1fr; gap: 32px; padding: 48px 20px 36px; }

  /* Course card wide */
  .course-card-wide .course-benefits { columns: 1; }
}

/* ── Mobile nhỏ 480px ── */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .section { padding: 44px 0; }
  .section-title { font-size: 1.4rem; }
  .section-sub { font-size: 0.88rem; margin-bottom: 28px; }

  /* Hero */
  .hero-title { font-size: clamp(1.5rem, 7vw, 2rem); }
  .hero-inner { padding: 28px 16px 44px; gap: 18px; }
  .hero-badge { font-size: 0.68rem; padding: 5px 12px; }
  .hero-desc { font-size: 0.88rem; margin-bottom: 16px; }
  .stat-num { font-size: 1.25rem; }
  .stat-label { font-size: 0.68rem; }
  .stat-divider { height: 26px; }
  .hero-cta .btn-lg { max-width: 300px; font-size: 0.9rem; padding: 13px 20px; }

  /* Credentials */
  .cred-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .cred-card { padding: 24px 18px 20px; }
  .cred-num { font-size: 2rem; }
  .cred-title { font-size: 0.9rem; }
  .cred-card p { font-size: 0.82rem; }

  /* Course cards */
  .course-card { padding: 20px 16px; }
  .course-banner { margin: -20px -16px 0; }
  .course-title { font-size: 0.95rem; }

  /* Benefits */
  .benefit-item { padding: 22px 18px; }

  /* Process */
  .step { max-width: 100%; }
  .step-num { font-size: 2.8rem; }

  /* Instructor */
  .instructor-photo { width: 150px; height: 150px; }
  .instructor-name { font-size: 1.35rem; }
  .ins-stat-num { font-size: 1.1rem; }
  .ins-stat-label { font-size: 0.65rem; }
  .instructor-socials { gap: 8px; }
  .social-btn { font-size: 0.82rem; padding: 9px 14px; }
  .instructor-cta { flex-direction: column; align-items: stretch; }
  .instructor-cta .btn { text-align: center; justify-content: center; }

  /* Coaching banner */
  .coaching-title-banner { font-size: 0.95rem; line-height: 1.2; }
  .coaching-banner-text-wrap { bottom: 10px; left: 10px; max-width: 52%; }

  /* Offline */
  .offline-slide-badge { font-size: 0.65rem; padding: 3px 10px; }
  .offline-slide-title { font-size: 0.82rem; }

  /* Partner grid */
  .partner-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }

  /* Testimonials */
  .testi-card { padding: 18px 16px; }
  .testi-text { font-size: 0.87rem; }
  .testi-avatar-photo { width: 42px; height: 42px; }

  /* CTA */
  .cta-section { padding: 52px 0; }
  .cta-title { font-size: 1.45rem; }
  .cta-desc { font-size: 0.88rem; }
  .cta-contacts { flex-direction: column; align-items: center; gap: 10px; }
  .contact-chip { width: 100%; max-width: 300px; justify-content: center; }

  /* Footer */
  .footer-inner { grid-template-columns: 1fr; padding: 40px 16px 32px; gap: 28px; }
  .footer-heading { font-size: 0.82rem; }
  .footer-links li a { font-size: 0.82rem; }
  .footer-tagline { font-size: 0.82rem; }
}