/* ==========================================================================
   CLB VÕ THUẬT ĐỨC TÂM MÔN - DESIGN SYSTEM: CỔ ĐIỂN × HIỆN ĐẠI
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. VARIABLES & DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette */
  --bg-dark: #0B0B0D;
  --bg-card-dark: #121217;
  --bg-card-surface: #181820;
  --bg-card-elevated: #22222D;
  
  --red-primary: #E10600;
  --red-hover: #FF2A24;
  --red-glow: rgba(225, 6, 0, 0.4);
  --red-subtle: rgba(225, 6, 0, 0.12);

  --gold-primary: #FFC72C;
  --gold-light: #FFE082;
  --gold-dark: #C69214;
  --gold-glow: rgba(255, 199, 44, 0.35);
  --gold-subtle: rgba(255, 199, 44, 0.1);

  --text-white: #FFFFFF;
  --text-gray: #B0B0B0;
  --text-muted: #7E7E88;
  --border-color: rgba(255, 255, 255, 0.08);

  /* Typography */
  --font-modern: 'Oswald', 'Arial Black', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-calligraphy: 'Dancing Script', cursive;
  --font-body: 'Be Vietnam Pro', system-ui, -apple-system, sans-serif;

  /* Layout & Spacing */
  --header-height: 76px;
  --container-max: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. RESET & BASE STYLES
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--text-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  color: var(--text-white);
  background-color: var(--bg-dark);
  overflow-x: hidden;
  position: relative;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* Fallback image placeholder */
.img-fallback {
  background: linear-gradient(135deg, #1f1f28 0%, #121217 100%) !important;
  display: flex !important;
  align-items: center;
  justify-content: center;
  color: var(--gold-primary);
  font-family: var(--font-modern);
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  min-height: 180px;
  border: 1px dashed rgba(255, 199, 44, 0.3);
  padding: 20px;
  text-align: center;
}

/* --------------------------------------------------------------------------
   3. TYPOGRAPHY & BUTTON UTILITIES
   -------------------------------------------------------------------------- */
.font-modern {
  font-family: var(--font-modern);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.font-serif {
  font-family: var(--font-serif);
}

.font-calligraphy {
  font-family: var(--font-calligraphy);
}

.text-gold {
  color: var(--gold-primary);
}

.text-red {
  color: var(--red-primary);
}

.text-gray {
  color: var(--text-gray);
}

/* Typography Balancing & Anti-Orphan Utilities */
.text-nowrap {
  white-space: nowrap !important;
}

.text-balance {
  text-wrap: balance !important;
}

.text-pretty {
  text-wrap: pretty !important;
}

h1, h2, h3, h4, h5, h6,
.section-title-classic,
.section-title-modern,
.section-subtitle-calligraphy,
.hero-slogan,
.classic-quote,
.strength-title,
.benefit-body h4,
.target-card h4,
.schedule-day-title {
  text-wrap: balance;
}

p, li, .about-p, .benefit-body p, .target-card p, .hero-desc, .master-bio {
  text-wrap: pretty;
}

/* Common Section Headers */
.section-header {
  text-align: center;
  margin-bottom: 48px;
  position: relative;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-modern);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--gold-primary);
  margin-bottom: 12px;
  padding: 4px 14px;
  background: var(--gold-subtle);
  border: 1px solid rgba(255, 199, 44, 0.3);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.section-tag.tag-red {
  color: var(--red-primary);
  background: var(--red-subtle);
  border-color: rgba(225, 6, 0, 0.3);
}

.section-title-classic {
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.25;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
  text-wrap: balance;
}

.section-title-modern {
  font-family: var(--font-modern);
  font-size: clamp(1.85rem, 4.5vw, 3rem);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-white);
  line-height: 1.15;
  letter-spacing: 2px;
  margin-bottom: 12px;
  text-wrap: balance;
}

.section-subtitle-calligraphy {
  font-family: var(--font-calligraphy);
  font-size: clamp(1.3rem, 2.5vw, 1.85rem);
  color: var(--gold-light);
  line-height: 1.4;
  margin-top: 6px;
  text-wrap: balance;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-modern);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

/* Modern Red CTA with Cut Corners */
.btn-primary-red {
  background: var(--red-primary);
  color: var(--text-white);
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
  box-shadow: 0 4px 20px var(--red-glow);
}

.btn-primary-red:hover {
  background: var(--red-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(225, 6, 0, 0.6);
  color: #fff;
}

.btn-primary-red::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: skewX(-25deg);
  transition: 0.6s;
}

.btn-primary-red:hover::after {
  left: 150%;
}

/* Classic Gold Button */
.btn-secondary-gold {
  background: transparent;
  color: var(--gold-primary);
  border: 1px solid var(--gold-primary);
  border-radius: var(--radius-sm);
  box-shadow: 0 0 12px rgba(255, 199, 44, 0.15);
}

.btn-secondary-gold:hover {
  background: var(--gold-primary);
  color: #000;
  box-shadow: 0 0 24px var(--gold-glow);
  transform: translateY(-2px);
}

.btn-outline-white {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-white);
  border: 1px solid rgba(255, 255, 255, 0.25);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   4. DIVIDERS (BRUSH STROKE & DIAGONAL CUT)
   -------------------------------------------------------------------------- */
.brush-divider {
  width: 100%;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin: 0 auto;
  pointer-events: none;
}

.brush-divider svg {
  width: 100%;
  max-width: 480px;
  height: 100%;
  fill: var(--gold-primary);
  opacity: 0.75;
}

.brush-divider.brush-red svg {
  fill: var(--red-primary);
}

.diagonal-divider {
  width: 100%;
  height: 50px;
  background: linear-gradient(135deg, transparent 49.5%, var(--bg-card-dark) 50%);
  margin-top: -1px;
}

.diagonal-divider-reverse {
  width: 100%;
  height: 50px;
  background: linear-gradient(-135deg, transparent 49.5%, var(--bg-dark) 50%);
  margin-top: -1px;
}

/* --------------------------------------------------------------------------
   5. HEADER & NAVIGATION
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(11, 11, 13, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 199, 44, 0.18);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background: rgba(8, 8, 10, 0.98);
  border-bottom-color: var(--red-primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  height: 70px;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo-wrap {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo-img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--gold-primary);
  box-shadow: 0 0 10px var(--gold-glow);
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.brand-logo-wrap:hover .brand-logo-img {
  transform: rotate(20deg) scale(1.05);
}

.brand-title {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-modern);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-white);
  line-height: 1.1;
  text-transform: uppercase;
}

.brand-sub {
  font-family: var(--font-serif);
  font-size: 0.72rem;
  letter-spacing: 1px;
  color: var(--gold-primary);
  font-style: italic;
}

/* Nav Links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-gray);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gold-primary);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

.nav-link:hover {
  color: var(--text-white);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--gold-primary);
}

/* Header Phone CTA */
.header-phone-btn {
  padding: 10px 20px;
  font-size: 0.9rem;
}

/* Mobile Hamburger Button */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 32px;
  height: 26px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.hamburger-line {
  width: 100%;
  height: 3px;
  background: var(--gold-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.hamburger-btn.active .hamburger-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
  background: var(--red-primary);
}

.hamburger-btn.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.active .hamburger-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
  background: var(--red-primary);
}

/* Mobile Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: min(85vw, 360px);
  height: 100vh;
  background: #0E0E14;
  border-left: 2px solid var(--gold-primary);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.8);
  padding: 100px 30px 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  z-index: 999;
  transition: right var(--transition-normal);
}

.mobile-nav-drawer.open {
  right: 0;
}

.mobile-nav-drawer .nav-link {
  font-size: 1.25rem;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.mobile-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-backdrop.show {
  opacity: 1;
  visibility: visible;
}

/* --------------------------------------------------------------------------
   6. HERO SECTION
   -------------------------------------------------------------------------- */
.hero-section {
  position: relative;
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 0 100px;
  background-color: var(--bg-dark);
  overflow: hidden;
}

/* Background Ink Artwork & Yin-Yang */
.hero-artwork-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.hero-yin-yang {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(700px, 85vw);
  height: min(700px, 85vw);
  transform: translate(-50%, -50%);
  opacity: 0.08;
  animation: slowRotate 120s linear infinite;
}

@keyframes slowRotate {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero-ink-cloud-1 {
  position: absolute;
  top: -10%;
  right: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(225, 6, 0, 0.15) 0%, transparent 70%);
  filter: blur(60px);
}

.hero-ink-cloud-2 {
  position: absolute;
  bottom: -15%;
  left: -5%;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(255, 199, 44, 0.12) 0%, transparent 70%);
  filter: blur(60px);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(225, 6, 0, 0.15);
  border: 1px solid var(--red-primary);
  color: #FFF;
  padding: 8px 18px;
  font-family: var(--font-modern);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 24px;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  box-shadow: 0 0 15px rgba(225, 6, 0, 0.35);
  animation: pulseBadge 2.5s infinite;
}

@keyframes pulseBadge {
  0%, 100% { box-shadow: 0 0 15px rgba(225, 6, 0, 0.35); }
  50% { box-shadow: 0 0 25px rgba(225, 6, 0, 0.7); }
}

.hero-title {
  font-family: var(--font-modern);
  font-size: clamp(2.4rem, 6.5vw, 4.6rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--text-white);
  line-height: 1.08;
  margin-bottom: 12px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.9);
}

.hero-title-highlight {
  color: var(--red-primary);
  display: inline-block;
  position: relative;
}

.hero-disciplines {
  font-family: var(--font-modern);
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gold-primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-disciplines span.dot {
  color: var(--red-primary);
  font-size: 1.2rem;
}

.hero-slogan {
  font-family: var(--font-calligraphy);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: #FFF;
  line-height: 1.3;
  margin-bottom: 24px;
  text-shadow: 0 2px 10px rgba(255, 199, 44, 0.25);
}

.hero-desc {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--text-gray);
  max-width: 760px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   7. GIỚI THIỆU CLB (PHONG CÁCH CỔ ĐIỂN)
   -------------------------------------------------------------------------- */
.about-section {
  position: relative;
  padding: 100px 0;
  background: radial-gradient(circle at 50% 20%, #15151C 0%, var(--bg-dark) 80%);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 60px;
}

.about-text-content {
  position: relative;
}

.about-lead {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-style: italic;
  color: var(--gold-light);
  line-height: 1.6;
  margin-bottom: 20px;
  padding-left: 20px;
  border-left: 3px solid var(--gold-primary);
}

.about-p {
  color: var(--text-gray);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 18px;
}

/* Traditional Ornate Frame for About Media */
.classic-ornate-frame {
  position: relative;
  padding: 14px;
  background: linear-gradient(145deg, #1d1d26, #101015);
  border: 1px solid rgba(255, 199, 44, 0.4);
  border-radius: var(--radius-md);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6), 0 0 25px rgba(255, 199, 44, 0.1);
}

.classic-ornate-frame::before {
  content: '';
  position: absolute;
  inset: 6px;
  border: 1px solid rgba(255, 199, 44, 0.25);
  border-radius: calc(var(--radius-md) - 2px);
  pointer-events: none;
}

/* Corner Accents */
.classic-corner {
  position: absolute;
  width: 24px;
  height: 24px;
  border: 2px solid var(--gold-primary);
  pointer-events: none;
  z-index: 3;
}
.classic-corner-tl { top: -2px; left: -2px; border-right: none; border-bottom: none; }
.classic-corner-tr { top: -2px; right: -2px; border-left: none; border-bottom: none; }
.classic-corner-bl { bottom: -2px; left: -2px; border-right: none; border-top: none; }
.classic-corner-br { bottom: -2px; right: -2px; border-left: none; border-top: none; }

.about-media-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  filter: brightness(0.95) contrast(1.05);
}

/* 4 Điểm Mạnh - Traditional Gold Bordered Cards */
.strength-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.strength-card {
  background: linear-gradient(180deg, rgba(255, 199, 44, 0.04) 0%, rgba(18, 18, 23, 0.8) 100%);
  border: 1px solid rgba(255, 199, 44, 0.25);
  border-radius: var(--radius-md);
  padding: 32px 22px;
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.strength-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.strength-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold-primary);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 20px var(--gold-glow);
}

.strength-card:hover::before {
  opacity: 1;
}

.strength-icon-wrap {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--gold-subtle);
  border: 1px solid rgba(255, 199, 44, 0.35);
  color: var(--gold-primary);
  font-size: 1.8rem;
}

.strength-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
  line-height: 1.35;
}

.strength-desc {
  font-size: 0.92rem;
  color: var(--text-gray);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   8. BỘ MÔN (3 THẺ: CỔ ĐIỂN vs HIỆN ĐẠI)
   -------------------------------------------------------------------------- */
.disciplines-section {
  padding: 110px 0;
  background-color: #0E0E12;
  position: relative;
}

.disciplines-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

/* Card 1: Võ Cổ Truyền - PHONG CÁCH CỔ ĐIỂN */
.discipline-card-classic {
  background: radial-gradient(circle at top, #1E1A16 0%, #121010 100%);
  border: 1px solid var(--gold-primary);
  border-radius: 20px 4px 20px 4px;
  padding: 38px 28px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), inset 0 0 40px rgba(255, 199, 44, 0.05);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.discipline-card-classic::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 140px;
  height: 140px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100' fill='%23FFC72C' opacity='0.08'%3E%3Cpath d='M50 0a50 50 0 1 0 0 100A50 50 0 0 0 50 0zm0 10a40 40 0 0 1 0 80 20 20 0 0 1 0-40 20 20 0 0 0 0-40z'/%3E%3Ccircle cx='50' cy='30' r='6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: contain;
  pointer-events: none;
}

.discipline-card-classic:hover {
  transform: translateY(-8px);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.7), 0 0 30px var(--gold-glow);
  border-color: var(--gold-light);
}

.classic-card-header {
  margin-bottom: 20px;
}

.classic-badge {
  display: inline-block;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--gold-primary);
  padding: 4px 12px;
  background: var(--gold-subtle);
  border: 1px solid rgba(255, 199, 44, 0.3);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.discipline-card-classic h3 {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.2;
}

.discipline-card-classic p {
  color: var(--text-gray);
  font-size: 0.98rem;
  line-height: 1.75;
  margin-bottom: 24px;
}

.discipline-card-classic .classic-quote {
  font-family: var(--font-calligraphy);
  font-size: 1.35rem;
  color: var(--gold-light);
  display: block;
  margin-top: 10px;
}

/* Card 2 & 3: Boxing & Kickboxing - PHONG CÁCH HIỆN ĐẠI */
.discipline-card-modern {
  background: linear-gradient(145deg, #171720 0%, #0F0F14 100%);
  border: 1px solid rgba(225, 6, 0, 0.4);
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
  padding: 38px 28px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.discipline-card-modern::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40px;
  height: 40px;
  background: var(--red-primary);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  opacity: 0.8;
}

.discipline-card-modern:hover {
  transform: translateY(-8px) scale(1.01);
  border-color: var(--red-primary);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.7), 0 0 30px var(--red-glow);
}

.modern-badge {
  display: inline-block;
  font-family: var(--font-modern);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: #FFF;
  background: var(--red-primary);
  padding: 4px 12px;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  margin-bottom: 12px;
}

.discipline-card-modern h3 {
  font-family: var(--font-modern);
  font-size: 2.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-white);
  line-height: 1.1;
  margin-bottom: 8px;
}

.discipline-card-modern p {
  color: var(--text-gray);
  font-size: 0.98rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.calorie-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-modern);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gold-primary);
  background: rgba(255, 199, 44, 0.1);
  border: 1px solid rgba(255, 199, 44, 0.25);
  padding: 6px 14px;
  margin-top: 8px;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   9. LỢI ÍCH KHI THAM GIA (4 MỤC - HIỆN ĐẠI GÓC CẠNH)
   -------------------------------------------------------------------------- */
.benefits-section {
  padding: 100px 0;
  background-color: var(--bg-dark);
  position: relative;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.benefit-card {
  background: var(--bg-card-dark);
  border-left: 4px solid var(--red-primary);
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 32px 28px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 24px 24px 0;
  border-color: transparent var(--red-primary) transparent transparent;
  transition: opacity var(--transition-fast);
}

.benefit-card:hover {
  transform: translateX(6px);
  background: var(--bg-card-surface);
  border-color: rgba(225, 6, 0, 0.4);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), 0 0 20px rgba(225, 6, 0, 0.15);
}

.benefit-num {
  font-family: var(--font-modern);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--red-primary);
  line-height: 1;
  opacity: 0.85;
  min-width: 48px;
}

.benefit-body h4 {
  font-family: var(--font-modern);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-white);
  margin-bottom: 8px;
}

.benefit-body p {
  color: var(--text-gray);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   10. ĐỐI TƯỢNG CHIÊU SINH (3 MỤC)
   -------------------------------------------------------------------------- */
.targets-section {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-dark) 0%, #13131A 50%, var(--bg-dark) 100%);
  position: relative;
}

.targets-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.target-card {
  background: var(--bg-card-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 36px 26px;
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
}

.target-card:hover {
  border-color: var(--gold-primary);
  transform: translateY(-6px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.5), 0 0 20px var(--gold-glow);
}

.target-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: rgba(225, 6, 0, 0.1);
  border: 2px solid var(--red-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--red-primary);
}

.target-card:nth-child(2) .target-icon {
  background: var(--gold-subtle);
  border-color: var(--gold-primary);
  color: var(--gold-primary);
}

.target-card:nth-child(3) .target-icon {
  background: rgba(255, 255, 255, 0.08);
  border-color: #FFF;
  color: #FFF;
}

.target-card h4 {
  font-family: var(--font-modern);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-white);
  margin-bottom: 12px;
}

.target-card p {
  color: var(--text-gray);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   11. LỊCH TẬP (2 KHỐI - PHONG CÁCH HIỆN ĐẠI GÓC CẠNH)
   -------------------------------------------------------------------------- */
.schedule-section {
  padding: 100px 0;
  background-color: #0E0E14;
  position: relative;
}

.schedule-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-bottom: 36px;
}

.schedule-block {
  background: var(--bg-card-dark);
  border: 1px solid rgba(225, 6, 0, 0.3);
  clip-path: polygon(16px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 16px);
  padding: 36px 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  position: relative;
}

.schedule-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px solid var(--red-primary);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.schedule-day-title {
  font-family: var(--font-modern);
  font-size: 1.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-white);
}

.schedule-badge {
  font-family: var(--font-modern);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gold-primary);
  background: var(--gold-subtle);
  border: 1px solid rgba(255, 199, 44, 0.3);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.schedule-rows {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.schedule-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--gold-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: all var(--transition-fast);
}

.schedule-row:hover {
  background: rgba(255, 255, 255, 0.07);
  transform: translateX(4px);
}

.schedule-class-name {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-white);
}

.schedule-class-time {
  font-family: var(--font-modern);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--gold-primary);
}

.schedule-note-box {
  text-align: center;
  max-width: 650px;
  margin: 0 auto;
  padding: 16px 24px;
  background: rgba(255, 199, 44, 0.06);
  border: 1px dashed rgba(255, 199, 44, 0.35);
  border-radius: var(--radius-md);
  font-size: 1rem;
  color: var(--text-gray);
}

.schedule-note-box strong {
  color: var(--gold-primary);
}

/* --------------------------------------------------------------------------
   12. VÕ SƯ (PHONG CÁCH CỔ ĐIỂN, TRANG TRỌNG)
   -------------------------------------------------------------------------- */
.master-section {
  padding: 110px 0;
  background: radial-gradient(circle at 50% 30%, #1A1715 0%, var(--bg-dark) 85%);
  position: relative;
}

.master-card-container {
  max-width: 900px;
  margin: 0 auto;
  background: linear-gradient(145deg, #16151B 0%, #100F14 100%);
  border: 1px solid var(--gold-primary);
  border-radius: var(--radius-lg);
  padding: 48px;
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7), 0 0 30px rgba(255, 199, 44, 0.15);
}

/* Traditional Outer Frame Accent */
.master-card-container::before {
  content: '';
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 199, 44, 0.25);
  border-radius: calc(var(--radius-lg) - 6px);
  pointer-events: none;
}

.master-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.master-photo-wrap {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid var(--gold-primary);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8), 0 0 20px var(--gold-glow);
}

.master-photo {
  width: 100%;
  height: 380px;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.master-info {
  display: flex;
  flex-direction: column;
}

.master-honorific {
  font-family: var(--font-calligraphy);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  color: var(--gold-light);
  margin-bottom: 6px;
  white-space: nowrap;
}

.master-name {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 2.4vw, 2.35rem);
  font-weight: 700;
  color: var(--text-white);
  line-height: 1.2;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.master-role {
  font-family: var(--font-modern);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--red-primary);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  white-space: nowrap;
}

.master-bio {
  color: var(--text-gray);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 24px;
}

.master-achievement-box {
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--gold-primary);
  padding: 14px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.master-achievement-box strong {
  color: var(--gold-primary);
}

/* --------------------------------------------------------------------------
   13. THƯ VIỆN ẢNH & VIDEO (LIGHTBOX & GOLD BORDERS)
   -------------------------------------------------------------------------- */
.gallery-section {
  padding: 100px 0;
  background-color: var(--bg-dark);
  position: relative;
}

/* Video Showcase */
.video-showcase {
  max-width: 900px;
  margin: 0 auto 50px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--gold-primary);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.7), 0 0 25px rgba(255, 199, 44, 0.15);
  background: #000;
  position: relative;
}

.video-player {
  width: 100%;
  max-height: 520px;
  display: block;
  background: #000;
}

.video-caption {
  padding: 16px 20px;
  background: rgba(18, 18, 23, 0.95);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid rgba(255, 199, 44, 0.2);
}

.video-caption span {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-white);
  line-height: 1.4;
}

@media (max-width: 640px) {
  .video-caption {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    padding: 14px 16px;
  }
  .video-caption a {
    width: 100%;
    text-align: center;
  }
}

/* Photo Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.gallery-item {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(255, 199, 44, 0.35);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.5);
  cursor: pointer;
  background: #14141A;
}

.gallery-item.span-2 {
  grid-column: span 2;
  aspect-ratio: 16 / 9;
}

.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.85) 100%);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.gallery-overlay-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gold-primary);
  color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-right: 10px;
}

.gallery-caption-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: #FFF;
}

.gallery-item:hover .gallery-img {
  transform: scale(1.08);
}

.gallery-item:hover {
  border-color: var(--gold-primary);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.7), 0 0 18px var(--gold-glow);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

/* Lightbox Modal */
.lightbox-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.94);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.lightbox-modal.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border: 2px solid var(--gold-primary);
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.9), 0 0 30px var(--gold-glow);
}

.lightbox-caption {
  margin-top: 14px;
  color: var(--gold-light);
  font-family: var(--font-body);
  font-size: 1rem;
  text-align: center;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--gold-primary);
  color: var(--gold-primary);
  border-radius: 50%;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background: var(--red-primary);
  border-color: var(--red-primary);
  color: #FFF;
  transform: rotate(90deg);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid var(--gold-primary);
  color: var(--gold-primary);
  border-radius: 50%;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lightbox-nav:hover {
  background: var(--gold-primary);
  color: #000;
}

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

/* --------------------------------------------------------------------------
   14. LIÊN HỆ & ĐĂNG KÝ (HIỆN ĐẠI, CTA ĐỎ MẠNH)
   -------------------------------------------------------------------------- */
.contact-section {
  padding: 110px 0;
  background: linear-gradient(180deg, #0E0E13 0%, #15151F 100%);
  position: relative;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: stretch;
}

/* Left Contact Info */
.contact-info-card {
  background: var(--bg-card-dark);
  border: 1px solid rgba(225, 6, 0, 0.3);
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
  padding: 44px 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-info-header h3 {
  font-family: var(--font-modern);
  font-size: 2rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-white);
  margin-bottom: 8px;
}

.contact-address-block {
  margin: 28px 0;
  padding: 20px;
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--red-primary);
}

.contact-address-title {
  font-family: var(--font-modern);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--gold-primary);
  margin-bottom: 8px;
}

.contact-address-text {
  color: var(--text-white);
  font-size: 1rem;
  line-height: 1.6;
}

.contact-direct-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
}

/* Right Registration Form */
.registration-form-wrap {
  background: var(--bg-card-surface);
  border: 1px solid rgba(225, 6, 0, 0.5);
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
  padding: 44px 36px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6), 0 0 30px var(--red-glow);
  position: relative;
}

.form-title {
  font-family: var(--font-modern);
  font-size: 2rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-white);
  margin-bottom: 8px;
}

.form-subtitle {
  color: var(--text-gray);
  font-size: 0.95rem;
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-family: var(--font-modern);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-white);
  margin-bottom: 8px;
}

.form-label span.req {
  color: var(--red-primary);
}

.form-control {
  width: 100%;
  padding: 14px 16px;
  background: #0B0B0E;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  color: #FFF;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--red-primary);
  box-shadow: 0 0 12px var(--red-glow);
  background: #111116;
}

select.form-control {
  cursor: pointer;
}

select.form-control option {
  background: #111116;
  color: #FFF;
}

.form-submit-btn {
  width: 100%;
  padding: 16px;
  font-size: 1.1rem;
  margin-top: 10px;
}

/* Registration Modal / Notification Popup */
.reg-notification {
  position: fixed;
  bottom: 24px;
  left: 24px;
  background: #14141B;
  border: 1px solid var(--gold-primary);
  padding: 18px 24px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8), 0 0 20px var(--gold-glow);
  z-index: 3000;
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 420px;
  transform: translateY(120%);
  opacity: 0;
  transition: all var(--transition-normal);
}

.reg-notification.show {
  transform: translateY(0);
  opacity: 1;
}

.reg-notification-icon {
  font-size: 1.8rem;
  color: var(--gold-primary);
}

.reg-notification-text {
  font-size: 0.92rem;
  color: #FFF;
  line-height: 1.4;
}

/* --------------------------------------------------------------------------
   15. FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  background: #060608;
  border-top: 2px solid var(--gold-primary);
  padding: 60px 0 30px;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-brand-title {
  font-family: var(--font-modern);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-white);
}

.footer-slogan {
  font-family: var(--font-calligraphy);
  font-size: 1.35rem;
  color: var(--gold-light);
}

.footer-address {
  color: var(--text-gray);
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-gray);
  font-size: 0.95rem;
}

.footer-contact-item strong {
  color: var(--gold-primary);
  font-family: var(--font-modern);
  letter-spacing: 1px;
}

.footer-contact-item a:hover {
  color: var(--gold-primary);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   16. FLOATING ACTION BUTTONS (GÓC PHẢI)
   -------------------------------------------------------------------------- */
.floating-actions {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 990;
}

.float-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  color: #FFF;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  transition: all var(--transition-normal);
  text-decoration: none;
  position: relative;
}

.float-btn-phone {
  background: var(--red-primary);
  box-shadow: 0 4px 20px var(--red-glow);
  animation: floatPulse 2.5s infinite;
}

@keyframes floatPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

.float-btn-zalo {
  background: #0068FF;
  box-shadow: 0 4px 20px rgba(0, 104, 255, 0.4);
}

.float-btn-top {
  background: #252530;
  border: 1px solid var(--gold-primary);
  color: var(--gold-primary);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}

.float-btn-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.float-btn:hover {
  transform: scale(1.12) translateY(-2px);
}

/* --------------------------------------------------------------------------
   17. SCROLL REVEAL ANIMATIONS (INTERSECTION OBSERVER)
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   18. RESPONSIVE BREAKPOINTS (MOBILE-FIRST CHECKLIST: 360px, 768px, 1440px)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .strength-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .disciplines-grid {
    grid-template-columns: 1fr;
  }
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 992px) {
  .master-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 32px;
  }

  .master-photo-wrap {
    max-width: 280px;
    margin: 0 auto;
  }

  .master-achievement-box {
    border-left: none;
    border-top: 3px solid var(--gold-primary);
    text-align: center;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 68px;
  }

  .nav-menu,
  .header-phone-btn {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
  }

  .targets-grid {
    grid-template-columns: 1fr;
  }

  .schedule-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-badge {
    font-size: 0.78rem;
    padding: 6px 10px;
    letter-spacing: 1px;
  }

  .hero-title {
    letter-spacing: 1.5px;
  }

  .master-card-container {
    padding: 24px 16px;
  }

  .master-name {
    font-size: clamp(1.15rem, 5vw, 1.45rem);
    white-space: nowrap;
  }

  .master-honorific {
    font-size: clamp(0.95rem, 4vw, 1.15rem);
    white-space: nowrap;
  }

  .strength-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .contact-info-card,
  .registration-form-wrap {
    padding: 28px 20px;
  }

  .floating-actions {
    bottom: 16px;
    right: 16px;
  }

  .video-caption {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .video-caption a {
    width: 100%;
    text-align: center;
  }

  .float-btn {
    width: 44px;
    height: 44px;
    font-size: 1.15rem;
  }
}