/* ===== ROOT DESIGN TOKENS ===== */
:root {
  --primary: #0f4c81;
  --primary-light: #1a6fb5;
  --primary-dark: #0a3558;
  --accent: #f7a325;
  --accent-light: #ffbe5c;
  --accent-dark: #d48a10;
  --success: #27ae60;
  --danger: #e74c3c;
  --bg-body: #f0f4f8;
  --bg-card: #ffffff;
  --bg-section-alt: #e8f0fa;
  --text-primary: #1a1a2e;
  --text-secondary: #555e6d;
  --text-light: #f0f4f8;
  --border-radius: 16px;
  --border-radius-sm: 8px;
  --shadow-card: 0 4px 20px rgba(15, 76, 129, 0.1);
  --shadow-hover: 0 8px 32px rgba(15, 76, 129, 0.18);
  --shadow-fab: 0 6px 24px rgba(247, 163, 37, 0.45);
  --transition: all 0.3s ease;
  --font-heading: 'Roboto', sans-serif;
  --font-body: 'Inter', sans-serif;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== HEADER ===== */
.site-header {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  color: var(--text-light);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: var(--max-width);
  margin: 0 auto;
}

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

.header-logo img {
  height: 56px;
  width: 56px;
  object-fit: contain;
  border-radius: 50%;
  background: white;
  padding: 3px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.header-logo .school-name {
  font-size: 0.78rem;
  font-weight: 500;
  opacity: 0.9;
  line-height: 1.3;
}

.header-logo .school-name strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  opacity: 1;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-nav .nav-link {
  color: rgba(255,255,255,0.85);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}

.header-nav .nav-link:hover {
  color: #fff;
  background: rgba(255,255,255,0.12);
}

.header-nav .nav-link.qc-link {
  border: 1px solid rgba(255,255,255,0.35);
}

.btn-register-header {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 10px 22px;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 3px 12px rgba(247, 163, 37, 0.35);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-register-header:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-fab);
}

/* ===== HERO SECTION ===== */
.hero-section {
  background: linear-gradient(135deg, var(--primary) 0%, #1565c0 50%, #0d47a1 100%);
  color: var(--text-light);
  padding: 60px 20px 50px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(255,255,255,0.06) 0%, transparent 70%);
  animation: heroGlow 8s infinite alternate ease-in-out;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(5%, 5%); }
}

.hero-section h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.hero-section .hero-subtitle {
  font-size: 1.1rem;
  opacity: 0.92;
  margin-bottom: 28px;
  position: relative;
  font-weight: 400;
}

.hero-year {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 1.4rem;
  padding: 8px 28px;
  border-radius: 50px;
  position: relative;
  box-shadow: 0 4px 16px rgba(247, 163, 37, 0.4);
  animation: pulseYear 2s infinite;
}

@keyframes pulseYear {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* ===== GENERAL INFO SECTION ===== */
.general-info-section {
  padding: 50px 20px;
  background: var(--bg-card);
}

.section-title {
  font-size: 1.7rem;
  color: var(--primary);
  text-align: center;
  margin-bottom: 36px;
  position: relative;
  padding-bottom: 14px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  border-radius: 2px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid rgba(15, 76, 129, 0.08);
  border-radius: var(--border-radius);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.info-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.info-card h3 {
  color: var(--primary);
  font-size: 1.1rem;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.info-card h3 .icon {
  font-size: 1.4rem;
}

.info-card p, .info-card ul {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

.info-card ul {
  padding-left: 20px;
}

.info-card ul li {
  margin-bottom: 6px;
}

.download-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  margin-left: 6px;
  color: var(--primary);
  transition: var(--transition);
  vertical-align: middle;
}

.download-icon:hover {
  color: var(--accent);
  transform: scale(1.2);
}

/* ===== LEVEL SECTION (Cao đẳng / Trung cấp) ===== */
.level-section {
  padding: 50px 20px;
}

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

.level-header {
  text-align: center;
  margin-bottom: 40px;
}

.level-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 1.4rem;
  font-weight: 800;
  padding: 14px 36px;
  border-radius: 50px;
  margin-bottom: 24px;
  box-shadow: 0 4px 16px rgba(15, 76, 129, 0.25);
}

.level-badge.tc-badge {
  background: linear-gradient(135deg, #2e7d32, #43a047);
  box-shadow: 0 4px 16px rgba(46, 125, 50, 0.25);
}

.level-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-bottom: 40px;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.level-info-item {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow-card);
  border-top: 4px solid var(--primary);
  transition: var(--transition);
}

.level-section.alt-bg .level-info-item {
  border-top-color: #2e7d32;
}

.level-info-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.level-info-item .info-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.level-info-item .info-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ===== CAREER CARDS GRID ===== */
.careers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.career-card {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

.career-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}

.career-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-bottom: 3px solid var(--primary);
  transition: var(--transition);
}

.career-card:hover .career-card-img {
  transform: scale(1.03);
}

.career-card-img-wrapper {
  overflow: hidden;
  position: relative;
}

.career-card-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.career-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}

.career-card-code {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-weight: 500;
}

.career-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 16px;
}

.badge-fee {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.badge-free {
  background: linear-gradient(135deg, #27ae60, #2ecc71);
  color: #fff;
}

.badge-discount {
  background: linear-gradient(135deg, #f39c12, #f7a325);
  color: #fff;
}

.career-card-quota {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-weight: 500;
}

.career-card-quota strong {
  color: var(--primary);
}

.btn-detail {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.88rem;
  padding: 10px 22px;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  width: 100%;
  text-align: center;
}

.btn-detail:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(15, 76, 129, 0.3);
}

/* ===== TIMELINE SECTION ===== */
.timeline-section {
  padding: 50px 20px;
  background: var(--bg-card);
}

.timeline-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.timeline-column {
  background: var(--bg-section-alt);
  border-radius: var(--border-radius);
  padding: 28px;
}

.timeline-column h3 {
  font-size: 1.15rem;
  color: var(--primary);
  margin-bottom: 20px;
  text-align: center;
}

.timeline-item {
  display: flex;
  gap: 14px;
  margin-bottom: 16px;
  align-items: flex-start;
}

.timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 6px;
  flex-shrink: 0;
  box-shadow: 0 0 0 4px rgba(247, 163, 37, 0.2);
}

.timeline-item-content .timeline-date {
  font-weight: 700;
  color: var(--primary);
  font-size: 0.92rem;
}

.timeline-item-content .timeline-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ===== BENEFITS SECTION ===== */
.benefits-section {
  padding: 50px 20px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: var(--text-light);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.benefit-card {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--border-radius);
  padding: 24px;
  transition: var(--transition);
}

.benefit-card:hover {
  background: rgba(255,255,255,0.16);
  transform: translateY(-3px);
}

.benefit-card .benefit-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.benefit-card h4 {
  font-size: 1rem;
  margin-bottom: 8px;
  font-weight: 600;
}

.benefit-card p {
  font-size: 0.85rem;
  opacity: 0.88;
  line-height: 1.6;
}

/* ===== CONTACT SECTION ===== */
.contact-section {
  padding: 50px 20px;
  background: var(--bg-card);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px;
  background: var(--bg-section-alt);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.contact-item:hover {
  box-shadow: var(--shadow-card);
}

.contact-item .contact-icon {
  font-size: 1.6rem;
  color: var(--primary);
}

.contact-item .contact-label {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--primary);
  margin-bottom: 4px;
}

.contact-item .contact-value {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.contact-item .contact-value a {
  color: var(--primary-light);
  font-weight: 500;
}

.contact-item .contact-value a:hover {
  text-decoration: underline;
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.7);
  text-align: center;
  padding: 24px 20px;
  font-size: 0.82rem;
}

.site-footer a {
  color: var(--accent-light);
}

/* ===== FLOATING ACTION BUTTON ===== */
.fab-register {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 16px 28px;
  border-radius: 60px;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-fab);
  transition: var(--transition);
  animation: fabBounce 2s infinite;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.fab-register:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 10px 36px rgba(247, 163, 37, 0.55);
  animation: none;
}

@keyframes fabBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.fab-register .fab-icon {
  font-size: 1.3rem;
}

/* ===== HAMBURGER (mobile) ===== */
.hamburger {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.6rem;
  cursor: pointer;
  padding: 6px;
}

/* ===== SECTION SUBTITLE ===== */
.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: -24px;
  margin-bottom: 32px;
}

.benefits-section .section-title {
  color: #fff;
}

.benefits-section .section-title::after {
  background: linear-gradient(90deg, var(--accent), #fff);
}

/* ===== XET TUYEN INFO ===== */
.xettuyen-section {
  padding: 50px 20px;
  background: var(--bg-section-alt);
}

.xettuyen-content {
  max-width: var(--max-width);
  margin: 0 auto;
}

.xettuyen-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.xettuyen-box {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.xettuyen-box h3 {
  color: var(--primary);
  font-size: 1.05rem;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.xettuyen-box p,
.xettuyen-box ul {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.xettuyen-box ul {
  padding-left: 20px;
}

.xettuyen-box ul li {
  margin-bottom: 6px;
}

.formula-box {
  background: linear-gradient(135deg, #e3f2fd, #bbdefb);
  border-radius: var(--border-radius-sm);
  padding: 16px 20px;
  margin-top: 12px;
  font-size: 0.9rem;
  border-left: 4px solid var(--primary);
}

.formula-box strong {
  color: var(--primary);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .header-content {
    flex-wrap: wrap;
    gap: 10px;
  }

  .header-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    background: var(--primary-dark);
    border-radius: var(--border-radius-sm);
    padding: 10px;
    margin-top: 8px;
  }

  .header-nav.open {
    display: flex;
  }

  .hamburger {
    display: block;
  }

  .hero-section h1 {
    font-size: 1.5rem;
  }

  .hero-section .hero-subtitle {
    font-size: 0.95rem;
  }

  .hero-year {
    font-size: 1.1rem;
    padding: 6px 22px;
  }

  .section-title {
    font-size: 1.3rem;
  }

  .info-grid,
  .careers-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .timeline-container {
    grid-template-columns: minmax(0, 1fr);
  }

  .xettuyen-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .fab-register {
    bottom: 16px;
    right: 16px;
    padding: 12px 20px;
    font-size: 0.82rem;
  }

  .level-info-grid {
    grid-template-columns: 1fr 1fr;
  }

  .btn-register-header {
    font-size: 0.8rem;
    padding: 8px 16px;
  }

  .header-logo img {
    height: 44px;
    width: 44px;
  }

  .header-logo .school-name {
    font-size: 0.7rem;
  }

  .header-logo .school-name strong {
    font-size: 0.82rem;
  }
}

@media (max-width: 480px) {
  .level-info-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .careers-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .fab-register span:not(.fab-icon) {
    display: none;
  }

  .fab-register {
    padding: 14px;
    border-radius: 50%;
  }
}