/* ==========================================================================
   MCO - MINH CHEMISTRY OLYMPIAD DESIGN SYSTEM
   Clean, Human-Crafted, Professional Educational Web Standard
   Zero AI tropes, Minimalist borderless layout, Authentic payment modal
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,600&family=Space+Grotesk:wght@600;700&display=swap');

:root {
  /* Brand Palette */
  --primary: #A61B2B;
  --primary-dark: #80121F;
  --primary-light: #FDF2F4;
  --primary-hover: #901422;
  --primary-glow: rgba(166, 27, 43, 0.08);

  --gold: #C69A2C;
  --gold-dark: #9E791B;
  --gold-light: #FAF5E8;

  --bg-page: #FBF9F6;
  --bg-surface: #FFFFFF;
  --bg-alt: #F4EFE8;
  --bg-dark: #1A0D10;

  --text-main: #1E293B;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --text-white: #FFFFFF;

  --border-subtle: #EBE6DF;
  --border-focus: #CBD5E1;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 28px rgba(0, 0, 0, 0.07);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;

  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', var(--font-main);

  --header-height: 70px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* ==========================================================================
   RESETS & TYPOGRAPHY
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-page);
  overflow-x: hidden;
  width: 100%;
  position: relative;
  padding-top: var(--header-height);
  -webkit-font-smoothing: antialiased;
}

@media (max-width: 768px) {
  :root {
    --header-height: 62px;
  }
}

section[id], div[id] {
  scroll-margin-top: calc(var(--header-height) + 12px);
}

.features-grid > *,
.course-grid > *,
.doc-grid > *,
.achievements-grid > *,
.team-grid > *,
.checkout-grid > *,
.footer-grid > *,
.cta-grid > *,
.roadmap-timeline > * {
  min-width: 0;
  box-sizing: border-box;
}

a, p, li, button, input, select, textarea, label {
  font-size: 1rem;
  font-family: inherit;
  box-sizing: border-box;
}

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

a:hover {
  color: var(--primary-hover);
}

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

.svg-ic, .svg-ic-sm, .svg-ic-lg {
  display: inline-block;
  vertical-align: middle;
  stroke: currentColor;
  fill: none;
  flex-shrink: 0;
}

.svg-ic-sm {
  width: 15px;
  height: 15px;
}

.svg-ic {
  width: 18px;
  height: 18px;
}

.svg-ic-lg {
  width: 22px;
  height: 22px;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.015em;
  word-break: normal;
  overflow-wrap: break-word;
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.6rem, 3.2vw, 2.35rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.25rem, 2.3vw, 1.85rem);
}

h3 {
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
}

h4 {
  font-size: 0.98rem;
}

p {
  color: var(--text-muted);
  margin-bottom: 0.8rem;
  word-break: normal;
  overflow-wrap: break-word;
  text-wrap: pretty;
}

p:last-child {
  margin-bottom: 0;
}

.text-sm {
  font-size: 0.875rem !important;
}

.text-xs {
  font-size: 0.75rem !important;
}

.font-bold {
  font-weight: 700;
}

.font-semibold {
  font-weight: 600;
}

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

.text-gold {
  color: var(--gold-dark) !important;
}

/* ==========================================================================
   CONTAINER & SECTIONS
   ========================================================================== */

.container {
  width: 100%;
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

section {
  padding: 52px 0;
  position: relative;
  width: 100%;
}

@media (max-width: 991px) {
  section {
    padding: 40px 0;
  }
}

@media (max-width: 576px) {
  section {
    padding: 32px 0;
  }
}

.section-alt {
  background-color: var(--bg-alt);
}

.section-white {
  background-color: var(--bg-surface);
}

.section-dark {
  background-color: var(--bg-dark);
  color: #FFFFFF;
}

.section-dark p {
  color: rgba(255, 255, 255, 0.75);
}

.section-dark h1, .section-dark h2, .section-dark h3 {
  color: #FFFFFF;
}

.section-head {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 32px auto;
  width: 100%;
}

.section-head h2 {
  text-wrap: balance;
  margin-bottom: 8px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  background: var(--primary-light);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.eyebrow.gold {
  color: var(--gold-dark);
  background: var(--gold-light);
}

.breadcrumb {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 8px;
}

.breadcrumb a {
  color: #FFFFFF;
  opacity: 0.8;
}

.breadcrumb a:hover {
  opacity: 1;
  text-decoration: underline;
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 640px) {
  .form-grid-2 {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

/* ==========================================================================
   BUTTONS (CLEAN RECTANGULAR WITH SUBTLE RADIUS)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
  max-width: 100%;
}

@media (max-width: 576px) {
  .btn {
    padding: 8px 14px;
    font-size: 0.85rem;
  }
}

.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 2px 6px rgba(166, 27, 43, 0.16);
}

.btn-primary:hover {
  background: var(--primary-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(166, 27, 43, 0.22);
}

.btn-gold {
  background: #D9A726;
  color: #1A1202;
  font-weight: 700;
}

.btn-gold:hover {
  background: #E5B534;
  color: #1A1202;
  transform: translateY(-1px);
}

.btn-outline {
  background: #FFFFFF;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.btn-outline-white {
  background: rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  backdrop-filter: blur(8px);
}

.btn-outline-white:hover {
  background: #FFFFFF;
  color: var(--primary);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.825rem;
}

.btn-lg {
  padding: 11px 22px;
  font-size: 0.95rem;
}

/* ==========================================================================
   FIXED SITE HEADER
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(251, 249, 246, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}

.brand-text {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.01em;
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text span {
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--gold-dark);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

@media (max-width: 380px) {
  .brand img {
    width: 30px;
    height: 30px;
  }
  .brand-text {
    font-size: 1rem;
  }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  width: 36px;
  height: 36px;
  cursor: pointer;
  padding: 6px;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  z-index: 120;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition-normal);
  display: block;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scale(0);
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

@media (max-width: 1024px) {
  .nav-links,
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
}

/* Mobile Drawer */
.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

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

.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(85vw, 300px);
  background: var(--bg-surface);
  z-index: 1100;
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.12);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.mobile-nav-drawer.open {
  transform: translateX(0);
}

.mobile-nav-header {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--primary-light);
}

.mobile-nav-close {
  background: var(--bg-surface);
  border: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  cursor: pointer;
}

.mobile-nav-links {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.mobile-nav-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
  background: var(--primary-light);
  color: var(--primary);
}

.mobile-nav-footer {
  margin-top: auto;
  padding: 14px 12px;
  background: var(--bg-alt);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mobile-nav-contact {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   HERO SLIDER
   ========================================================================== */

.hero-slider {
  position: relative;
  width: 100%;
  min-height: 540px;
  background: #140306;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: 28px 0 60px 0;
}

@media (max-width: 991px) {
  .hero-slider {
    min-height: 500px;
    padding: 20px 0 55px 0;
  }
}

@media (max-width: 576px) {
  .hero-slider {
    min-height: 480px;
    padding: 14px 0 50px 0;
  }
}

.hero-slides {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.75s ease, visibility 0.75s ease;
  display: flex;
  align-items: center;
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
  z-index: 2;
}

.hero-slide-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-slide-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(16, 4, 7, 0.85) 0%, rgba(18, 4, 7, 0.65) 45%, rgba(18, 4, 7, 0.3) 100%);
  z-index: 1;
}

@media (max-width: 768px) {
  .hero-slide-overlay {
    background: rgba(16, 4, 7, 0.8);
  }
}

.hero-slide-container {
  position: relative;
  z-index: 3;
  width: 100%;
  display: flex;
  align-items: center;
}

.hero-blur-panel {
  max-width: 640px;
  width: 100%;
  background: rgba(22, 6, 9, 0.84);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  color: #FFFFFF;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
  box-sizing: border-box;
}

@media (max-width: 991px) {
  .hero-blur-panel {
    max-width: 100%;
    padding: 22px 20px;
  }
}

@media (max-width: 576px) {
  .hero-blur-panel {
    padding: 16px 14px;
    border-radius: var(--radius-md);
  }
}

.hero-blur-panel h1 {
  color: #FFFFFF;
  font-size: clamp(1.4rem, 3vw, 2.15rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 10px;
  text-wrap: balance;
}

.hero-blur-panel h1 em {
  font-style: normal;
  color: #E5B534;
  font-weight: 700;
}

.hero-blur-panel .hero-text {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.92rem;
  line-height: 1.5;
  margin-bottom: 14px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

@media (max-width: 576px) {
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
}

.hero-stats-mini {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-stats-mini div strong {
  display: block;
  font-size: 1.1rem;
  color: #E5B534;
  font-family: var(--font-display);
  line-height: 1.1;
}

.hero-stats-mini div span {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.2;
  display: block;
}

.hero-controls {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(18, 4, 7, 0.7);
  backdrop-filter: blur(6px);
  padding: 4px 10px;
  border-radius: var(--radius-md);
}

.hero-arrow {
  background: transparent;
  border: none;
  color: #FFFFFF;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
}

.hero-pagination {
  display: flex;
  align-items: center;
  gap: 5px;
}

.hero-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.hero-dot.active {
  width: 16px;
  border-radius: 4px;
  background: #E5B534;
}

/* ==========================================================================
   PAGE HEROES (SUB-PAGES)
   ========================================================================== */

.page-hero {
  position: relative;
  background: linear-gradient(135deg, rgba(128, 18, 31, 0.95) 0%, rgba(166, 27, 43, 0.92) 100%), var(--page-hero-img, none);
  background-size: cover;
  background-position: center;
  color: #FFFFFF;
  padding: 38px 0 30px 0;
}

@media (max-width: 768px) {
  .page-hero {
    padding: 26px 0 20px 0;
  }
}

.page-hero .container {
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  color: #FFFFFF;
  margin-bottom: 6px;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.92rem;
  max-width: 640px;
}

/* ==========================================================================
   FEATURE PILLARS & ROADMAPS
   ========================================================================== */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: 16px;
  width: 100%;
}

.feature-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 20px 18px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
}

.roadmap-timeline {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  width: 100%;
}

.roadmap-step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 14px;
  margin-bottom: 18px;
  position: relative;
}

.roadmap-step::after {
  content: '';
  position: absolute;
  left: 31px;
  top: 48px;
  bottom: -18px;
  width: 2px;
  background: var(--border-subtle);
}

.roadmap-step:last-child::after {
  display: none;
}

@media (max-width: 600px) {
  .roadmap-step {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .roadmap-step::after {
    display: none;
  }
  .step-badge {
    width: 100% !important;
    height: 40px !important;
    flex-direction: row !important;
    gap: 8px !important;
  }
}

.step-badge {
  width: 64px;
  height: 64px;
  background: var(--primary);
  color: #FFFFFF;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  z-index: 2;
  flex-shrink: 0;
  font-size: 0.875rem;
}

.step-badge span {
  font-size: 0.65rem;
  color: #E5B534;
}

.step-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  box-shadow: var(--shadow-sm);
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 14px;
  width: 100%;
}

.student-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--transition-normal);
}

.student-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.student-head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.student-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.student-award {
  display: inline-block;
  padding: 2px 8px;
  background: var(--gold-light);
  color: var(--gold-dark);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.76rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: 16px;
  width: 100%;
}

.team-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.team-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.team-head {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
}

.team-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ==========================================================================
   FAQ ACCORDION
   ========================================================================== */

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
}

.faq-item {
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-q {
  width: 100%;
  padding: 13px 15px;
  background: transparent;
  border: none;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.faq-item.open .faq-q {
  color: var(--primary);
}

.faq-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-normal);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  background: var(--primary);
  color: #FFFFFF;
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
  padding: 0 15px;
}

.faq-a-inner {
  padding-bottom: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 8px;
  font-size: 0.88rem;
}

/* ==========================================================================
   COURSES & DOCUMENT GRIDS
   ========================================================================== */

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 24px;
  width: 100%;
}

@media (max-width: 768px) {
  .filter-row {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .filter-row::-webkit-scrollbar {
    display: none;
  }
}

.chip {
  padding: 6px 12px;
  background: var(--bg-surface);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.chip:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.chip.active {
  background: var(--primary);
  color: #FFFFFF;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 18px;
  width: 100%;
}

@media (max-width: 640px) {
  .course-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

.course-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  width: 100%;
}

.course-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.course-top {
  height: 155px;
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 10px;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
}

.course-top::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.05) 0%, rgba(0,0,0,0.5) 100%);
}

.course-level-badge {
  position: relative;
  z-index: 2;
  background: rgba(15, 23, 42, 0.75);
  color: #FFFFFF;
  backdrop-filter: blur(4px);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
}

.course-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.course-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 4px;
}

.course-body h3 {
  margin-bottom: 5px;
  font-size: 1.05rem;
}

.course-body p {
  flex-grow: 1;
  font-size: 0.875rem;
  margin-bottom: 10px;
}

.course-features-mini {
  list-style: none;
  margin-bottom: 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.course-features-mini li {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}

.course-features-mini li svg {
  color: var(--primary);
  flex-shrink: 0;
}

.course-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 6px;
}

@media (max-width: 480px) {
  .course-foot {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }
  .course-foot .btn {
    width: 100%;
  }
}

.course-pricing {
  display: flex;
  flex-direction: column;
}

.course-price-val {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  font-family: var(--font-display);
}

.course-price-period {
  font-size: 0.68rem;
  color: var(--text-muted);
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 270px), 1fr));
  gap: 14px;
  width: 100%;
}

.doc-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  transition: all var(--transition-normal);
  width: 100%;
}

.doc-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.doc-header {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.doc-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  color: var(--text-light);
}

@media (max-width: 480px) {
  .doc-card .btn {
    width: 100%;
  }
}

/* ==========================================================================
   CHECKOUT PAGE (CLEAN E-COMMERCE FORM)
   ========================================================================== */

.checkout-page-section {
  padding: 30px 0 50px 0;
  width: 100%;
}

@media (max-width: 768px) {
  .checkout-page-section {
    padding: 18px 0 36px 0;
  }
}

.checkout-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 20px;
  align-items: start;
  width: 100%;
}

@media (max-width: 991px) {
  .checkout-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

.checkout-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 20px 18px;
  box-shadow: var(--shadow-sm);
  box-sizing: border-box;
  width: 100%;
}

@media (max-width: 576px) {
  .checkout-card {
    padding: 14px 12px;
  }
}

.checkout-section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.checkout-step-num {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: var(--primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.78rem;
  flex-shrink: 0;
}

.checkout-section-title h2 {
  font-size: 1.05rem;
  margin-bottom: 0;
  color: var(--text-main);
}

.order-summary-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  box-shadow: var(--shadow-sm);
  box-sizing: border-box;
  position: sticky;
  top: 82px;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

@media (max-width: 991px) {
  .order-summary-card {
    position: static;
  }
}

@media (max-width: 576px) {
  .order-summary-card {
    padding: 14px 12px;
  }
}

.order-items-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.order-item {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.order-item-thumb {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}

.order-item-info {
  flex-grow: 1;
  min-width: 0;
  overflow: hidden;
}

.order-item-title {
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 2px;
  word-break: break-word;
}

.order-item-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.order-item-price {
  font-weight: 800;
  color: var(--primary);
  font-size: 0.92rem;
  white-space: nowrap;
  font-family: var(--font-display);
  flex-shrink: 0;
}

/* ==========================================================================
   ADD MORE COURSE COMBO BOX (CLEAN, POLISHED & RESPONSIVE)
   ========================================================================== */

.add-more-course-box {
  margin: 14px 0 16px;
  padding: 12px 14px;
  background: #f8fafc;
  border: 1.5px dashed #cbd5e1;
  border-radius: var(--radius-md, 8px);
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

.add-more-course-box .add-more-course-label {
  margin-bottom: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #0f172a;
  display: flex;
  align-items: center;
  gap: 6px;
  line-height: 1.35;
}

.add-more-course-box .add-more-ic {
  font-size: 13px;
  color: var(--primary, #003366);
  flex-shrink: 0;
}

.add-more-course-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.add-more-course-row select {
  flex: 1 1 0%;
  min-width: 0 !important;
  width: 100% !important;
  max-width: 100% !important;
  font-size: 0.825rem;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid #cbd5e1;
  background-color: #ffffff;
  color: #1e293b;
  font-weight: 500;
  outline: none;
  box-sizing: border-box;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  cursor: pointer;
  height: 38px;
  line-height: 1.2;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.add-more-course-row select:focus {
  border-color: var(--primary, #003366);
  box-shadow: 0 0 0 2px rgba(0, 51, 102, 0.12);
}

.add-more-course-row .btn-add-course {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px 14px;
  font-size: 0.825rem;
  font-weight: 700;
  border-radius: 6px;
  background: var(--primary, #003366);
  color: #ffffff;
  border: 1px solid var(--primary, #003366);
  cursor: pointer;
  white-space: nowrap;
  height: 38px;
  transition: all 0.2s ease;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.add-more-course-row .btn-add-course:hover {
  background: #002244;
  border-color: #002244;
  transform: translateY(-1px);
}

.add-more-course-row .btn-add-course:active {
  transform: translateY(0);
}

.btn-add-text-desktop {
  display: inline;
}

.btn-add-text-mobile {
  display: none;
}

@media (max-width: 520px) {
  .add-more-course-box {
    padding: 10px 12px;
  }
  .add-more-course-box .add-more-course-label {
    font-size: 0.76rem;
  }
  .add-more-course-row {
    flex-direction: column;
    gap: 8px;
  }
  .add-more-course-row select {
    width: 100% !important;
    height: 42px;
    font-size: 0.85rem;
  }
  .add-more-course-row .btn-add-course {
    width: 100%;
    height: 40px;
    font-size: 0.875rem;
    justify-content: center;
  }
  .btn-add-text-desktop {
    display: none;
  }
  .btn-add-text-mobile {
    display: inline;
  }
  .order-item-thumb {
    width: 38px !important;
    height: 38px !important;
  }
  .order-item-title {
    font-size: 0.82rem !important;
  }
  .order-item-price {
    font-size: 0.85rem !important;
  }
}

.coupon-box {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.coupon-box input {
  flex: 1 1 0%;
  min-width: 0 !important;
  width: 100%;
  max-width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  font-size: 0.825rem;
  outline: none;
  box-sizing: border-box;
}

.coupon-box input:focus {
  border-color: var(--primary);
  background: #FFFFFF;
}

.coupon-box button {
  flex: 0 0 auto;
  white-space: nowrap;
  padding: 8px 14px;
}

.price-breakdown {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
  font-size: 0.85rem;
}

.price-row {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
}

.price-row.total-row {
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.95rem;
  align-items: baseline;
}

.price-row.total-row .total-amount {
  color: var(--primary);
  font-size: 1.2rem;
  font-weight: 800;
  font-family: var(--font-display);
}

.payment-methods-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.payment-method-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.payment-method-item:hover,
.payment-method-item.active {
  background: var(--primary-light);
}

.payment-method-item input[type="radio"] {
  accent-color: var(--primary);
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.payment-method-text strong {
  font-size: 0.85rem;
  display: block;
}

.payment-method-text span {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: block;
}

.field {
  margin-bottom: 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 100%;
}

.field label {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-main);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  color: var(--text-main);
  outline: none;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--primary);
  background: #FFFFFF;
}

/* ==========================================================================
   AUTHENTIC PROFESSIONAL VIETQR PAYMENT MODAL (CLEAN INVOICE STYLE)
   ========================================================================== */

.order-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.order-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.order-modal-card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  max-width: 440px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 0;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.16);
  transform: scale(0.97);
  transition: transform var(--transition-normal);
  box-sizing: border-box;
  text-align: left;
}

.order-modal-backdrop.open .order-modal-card {
  transform: scale(1);
}

/* Modal Header Bar */
.order-modal-header {
  padding: 16px 20px;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.order-modal-header h3 {
  font-size: 1.05rem;
  color: var(--text-main);
  margin-bottom: 0;
}

.order-modal-close-btn {
  background: var(--bg-page);
  border: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.order-modal-close-btn:hover {
  background: var(--border-subtle);
  color: var(--text-main);
}

/* Modal Body */
.order-modal-body {
  padding: 20px;
}

.order-amount-banner {
  background: var(--primary-light);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.order-amount-banner .label {
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 600;
}

.order-amount-banner .val {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  font-family: var(--font-display);
}

.qr-display-box {
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  text-align: center;
  margin-bottom: 16px;
}

.qr-display-box img {
  width: 160px;
  height: 160px;
  object-fit: contain;
  margin: 0 auto 6px auto;
}

.qr-display-box span {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
}

/* Transfer Info Details with Copy Buttons */
.transfer-info-table {
  background: var(--bg-page);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}

.transfer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.825rem;
}

.transfer-row .key {
  color: var(--text-muted);
}

.transfer-row .val-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.transfer-row .val {
  font-weight: 700;
  color: var(--text-main);
}

.copy-btn {
  background: #FFFFFF;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: var(--primary);
  color: #FFFFFF;
}

/* Modal Actions */
.order-modal-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

@media (max-width: 520px) {
  .order-modal-backdrop {
    padding: 10px;
  }
  .order-modal-card {
    max-width: 100%;
    border-radius: var(--radius-md);
  }
  .order-modal-header {
    padding: 12px 14px;
  }
  .order-modal-body {
    padding: 14px 12px;
  }
  .qr-display-box {
    padding: 10px;
  }
  .qr-display-box img {
    width: 140px;
    height: 140px;
  }
  .transfer-info-table {
    padding: 10px;
    gap: 6px;
  }
  .transfer-row {
    font-size: 0.78rem;
    flex-wrap: wrap;
    gap: 3px;
  }
  .transfer-row .val-group {
    flex-wrap: wrap;
  }
}

/* ==========================================================================
   CONSULTATION FORM (CTA SECTION)
   ========================================================================== */

.cta-section {
  background: linear-gradient(135deg, #80121F 0%, #A61B2B 100%);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  color: #FFFFFF;
  box-shadow: var(--shadow-md);
  width: 100%;
}

@media (max-width: 991px) {
  .cta-section {
    padding: 24px 16px;
  }
}

.cta-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 20px;
  align-items: center;
  width: 100%;
}

@media (max-width: 991px) {
  .cta-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

.cta-grid h2 {
  color: #FFFFFF;
  margin-bottom: 6px;
}

.cta-grid p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
  margin-bottom: 14px;
}

.contact-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  background: rgba(255, 255, 255, 0.12);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  width: fit-content;
  max-width: 100%;
}

.contact-chip .ic {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #E5B534;
  color: #1A1202;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  flex-shrink: 0;
}

.contact-chip a {
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.875rem;
}

.form-card {
  background: #FFFFFF;
  border-radius: 12px;
  padding: 22px 20px;
  color: var(--text-main);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  width: 100%;
}

.form-card h3 {
  color: #80121F;
  margin-bottom: 14px;
  font-size: 1.15rem;
  font-weight: 700;
}

/* Contact Form 7 Form Integration in .form-card */
.form-card .wpcf7 form p {
  margin: 0 !important;
  padding: 0 !important;
}

.form-card .wpcf7 form br {
  display: none !important;
}

.form-card .wpcf7-form-control-wrap {
  display: block;
  width: 100%;
}

.form-card .field {
  margin-bottom: 12px;
}

.form-card .field label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 6px;
}

.form-card .field input,
.form-card .field select,
.form-card .field textarea,
.form-card input.mco-cf7-input,
.form-card select.mco-cf7-select,
.form-card .wpcf7-form-control.wpcf7-text,
.form-card .wpcf7-form-control.wpcf7-select {
  width: 100% !important;
  height: 44px;
  padding: 10px 14px;
  border: 1.5px solid #cbd5e1;
  border-radius: 8px;
  background: #f8fafc;
  color: #0f172a;
  outline: none;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  box-sizing: border-box;
}

.form-card .field input::placeholder,
.form-card input.mco-cf7-input::placeholder,
.form-card .wpcf7-form-control.wpcf7-text::placeholder {
  color: #94a3b8;
  font-weight: 400;
}

.form-card .field input:focus,
.form-card .field select:focus,
.form-card .field textarea:focus,
.form-card input.mco-cf7-input:focus,
.form-card select.mco-cf7-select:focus,
.form-card .wpcf7-form-control.wpcf7-text:focus,
.form-card .wpcf7-form-control.wpcf7-select:focus {
  border-color: #80121F !important;
  background: #FFFFFF !important;
  box-shadow: 0 0 0 3px rgba(128, 18, 31, 0.1) !important;
}

.form-card input[type="submit"].btn,
.form-card button[type="submit"].btn,
.form-card .mco-cf7-submit,
.form-card .wpcf7-submit {
  width: 100% !important;
  display: block !important;
  height: 48px;
  line-height: 48px;
  padding: 0 16px;
  font-size: 0.98rem;
  font-weight: 700;
  text-align: center;
  border-radius: 8px;
  background: #D9A726 !important;
  color: #1A1202 !important;
  border: none !important;
  cursor: pointer;
  margin-top: 10px;
  transition: all 0.2s ease;
  box-shadow: 0 2px 6px rgba(217, 167, 38, 0.2);
}

.form-card input[type="submit"].btn:hover,
.form-card button[type="submit"].btn:hover,
.form-card .mco-cf7-submit:hover,
.form-card .wpcf7-submit:hover {
  background: #E5B534 !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(217, 167, 38, 0.3);
}

.form-card input[type="submit"].btn:active,
.form-card button[type="submit"].btn:active,
.form-card .mco-cf7-submit:active,
.form-card .wpcf7-submit:active {
  transform: translateY(0);
}

.form-card .wpcf7-not-valid-tip {
  font-size: 0.78rem !important;
  color: #dc2626 !important;
  margin-top: 4px;
  font-weight: 600;
  display: block;
}

.form-card .wpcf7-response-output {
  margin: 12px 0 0 0 !important;
  padding: 10px 14px !important;
  border-radius: 8px !important;
  font-size: 0.85rem !important;
  font-weight: 600 !important;
  line-height: 1.4 !important;
  text-align: center !important;
}

.form-card form.sent .wpcf7-response-output {
  background: #f0fdf4 !important;
  border: 1px solid #86efac !important;
  color: #166534 !important;
}

.form-card form.failed .wpcf7-response-output,
.form-card form.invalid .wpcf7-response-output {
  background: #fef2f2 !important;
  border: 1px solid #fca5a5 !important;
  color: #991b1b !important;
}

.form-card .wpcf7-spinner {
  display: block;
  margin: 8px auto 0 auto;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
  background: var(--bg-dark);
  color: #FFFFFF;
  padding: 40px 0 20px 0;
  width: 100%;
}

.site-footer p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.85rem;
  line-height: 1.5;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.1fr 1.4fr;
  gap: 22px;
  margin-bottom: 24px;
  width: 100%;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.2fr 1fr;
    gap: 18px;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.footer-brand img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

.footer-brand-text {
  font-size: 1.05rem;
  font-weight: 800;
  color: #FFFFFF;
}

.site-footer h4 {
  color: #E5B534;
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #E5B534;
}

.footer-contact {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
}

.footer-ic {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(217, 167, 38, 0.15);
  color: #E5B534;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.footer-contact-info {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.footer-contact-info .label {
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.55);
  text-transform: uppercase;
}

.footer-contact-info a {
  color: #FFFFFF;
  font-weight: 600;
}

.footer-bottom {
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.76rem;
  color: rgba(255, 255, 255, 0.6);
  flex-wrap: wrap;
  gap: 6px;
}

@media (max-width: 576px) {
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ==========================================================================
   FLOATING CHAT & TOAST
   ========================================================================== */

.chat-fab {
  position: fixed;
  bottom: 16px;
  right: 16px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(166, 27, 43, 0.28);
  cursor: pointer;
  z-index: 999;
  transition: all var(--transition-normal);
}

.chat-fab:hover {
  transform: scale(1.05);
}

.chat-panel {
  position: fixed;
  bottom: 68px;
  right: 16px;
  width: min(90vw, 320px);
  background: #FFFFFF;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
}

@media (max-width: 576px) {
  .chat-panel {
    right: 10px;
    bottom: 64px;
    width: calc(100vw - 20px);
  }
}

.chat-panel.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.chat-head {
  background: var(--primary);
  color: #FFFFFF;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chat-head img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
}

.chat-head strong {
  display: block;
  font-size: 0.85rem;
}

.chat-head span {
  font-size: 0.68rem;
  opacity: 0.85;
}

.chat-close-btn {
  margin-left: auto;
  background: transparent;
  border: none;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.chat-body {
  height: 180px;
  padding: 10px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg-page);
}

.bubble {
  max-width: 85%;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  background: #FFFFFF;
  color: var(--text-main);
  font-size: 0.825rem;
  box-shadow: var(--shadow-sm);
}

.chat-foot {
  display: flex;
  padding: 6px;
  background: #FFFFFF;
  border-top: 1px solid var(--border-subtle);
}

.chat-foot input {
  flex-grow: 1;
  padding: 5px 8px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 0.825rem;
}

.chat-foot button {
  background: var(--primary);
  color: #FFFFFF;
  border: none;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  margin-left: 5px;
  font-weight: 600;
  font-size: 0.825rem;
  cursor: pointer;
}

.toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-width: calc(100vw - 32px);
}

.toast {
  background: #FFFFFF;
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  gap: 6px;
  animation: toastIn 0.25s ease;
  font-size: 0.825rem;
}

.toast.toast-success {
  border-left-color: #10B981;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ==========================================================================
   MCO Video Preview Modal (Trang Khóa Học)
   ========================================================================== */
.mco-video-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2500;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s ease, visibility 0.28s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  box-sizing: border-box;
}

.mco-video-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mco-video-modal-container {
  background: #0f172a;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 25px 60px -12px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255, 255, 255, 0.06);
  width: 100%;
  max-width: 880px;
  overflow: hidden;
  transform: scale(0.94);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  box-sizing: border-box;
}

.mco-video-modal-backdrop.open .mco-video-modal-container {
  transform: scale(1);
}

.mco-video-modal-header {
  padding: 14px 20px;
  background: #1e293b;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.mco-video-modal-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: #f8fafc;
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mco-video-modal-close {
  background: rgba(255, 255, 255, 0.08);
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.mco-video-modal-close:hover {
  background: #B30D23;
  color: #ffffff;
  transform: rotate(90deg);
}

.mco-video-modal-body {
  background: #000000;
  position: relative;
  width: 100%;
}

.mco-video-responsive-wrap {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  background: #000;
}

.mco-video-responsive-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}