/*
 * ═══════════════════════════════════════════════════════════════
 *  NGAO LABS ACADEMY — Components
 *  Reusable UI components: navbar, buttons, cards, badges,
 *  tabs, pills, footer, back-to-top.
 * ═══════════════════════════════════════════════════════════════
 */

/* ╔═══════════════════════════════════════════════╗
   ║  NAVIGATION                                   ║
   ╚═══════════════════════════════════════════════╝ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--duration-slow) var(--ease-out-expo),
              box-shadow var(--duration-slow) var(--ease-out-expo),
              border-color var(--duration-slow) var(--ease-out-expo);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-color: var(--border-subtle);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.40);
}

.nav__inner {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* Brand Logo */
.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav__logo {
  height: 44px;
  width: auto;
  object-fit: contain;
}

/* Links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
}

.nav__link {
  position: relative;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  white-space: nowrap;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 2px;
  background: var(--gold-400);
  border-radius: var(--radius-full);
  transition: transform var(--duration-base) var(--ease-out-expo);
}

.nav__link:hover {
  color: var(--navy-800);
}

.nav__link:hover::after,
.nav__link.active::after {
  transform: translateX(-50%) scaleX(1);
}

.nav__link.active {
  color: var(--gold-400);
}

/* Nav CTA */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  padding: var(--space-2);
  transition: var(--transition-fast);
}

.nav__hamburger:hover {
  border-color: var(--gold-400);
}

.nav__hamburger span {
  display: block;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--duration-base) var(--ease-out-expo),
              opacity var(--duration-base) var(--ease-out-expo);
  transform-origin: center;
}

.nav__hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile menu */
.nav__mobile {
  display: flex;
  visibility: hidden;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  overflow-y: auto;
  background: var(--surface-overlay);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  transform: translateY(-8px);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out-expo),
              transform var(--duration-base) var(--ease-out-expo),
              visibility 0s linear 0.3s;
  pointer-events: none;
  z-index: 999;
}

.nav__mobile.open {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  transition: opacity var(--duration-base) var(--ease-out-expo),
              transform var(--duration-base) var(--ease-out-expo),
              visibility 0s linear 0s;
}

.nav__mobile .nav__link {
  font-size: var(--text-base);
  padding: var(--space-3) var(--space-4);
}

.nav__mobile .nav__link::after { display: none; }

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
}

/* ╔═══════════════════════════════════════════════╗
   ║  BUTTONS                                      ║
   ╚═══════════════════════════════════════════════╝ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0);
  transition: background var(--duration-fast);
}

.btn:hover::before {
  background: rgba(255, 255, 255, 0.06);
}

/* Primary button */
.btn--primary {
  background: var(--navy-800);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(11, 31, 74, 0.20);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(11, 31, 74, 0.30);
}

.btn--primary:active {
  transform: translateY(0);
}

/* Ghost / outline button */
.btn--ghost {
  background: transparent;
  color: var(--navy-800);
  border: 1px solid var(--navy-800);
}

.btn--ghost:hover {
  background: var(--navy-800);
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* Small button variant */
.btn--sm {
  padding: 0.625rem 1.25rem;
  font-size: var(--text-xs);
}

/* Large button variant */
.btn--lg {
  padding: 1.125rem 2.25rem;
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

/* Icon button */
.btn__icon {
  width: 18px;
  height: 18px;
  transition: transform var(--duration-base) var(--ease-spring);
}

.btn:hover .btn__icon {
  transform: translateX(4px);
}

/* ╔═══════════════════════════════════════════════╗
   ║  BADGES & PILLS                               ║
   ╚═══════════════════════════════════════════════╝ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border-radius: var(--radius-full);
}

.badge--gold {
  background: rgba(201, 162, 39, 0.15);
  color: var(--gold-300);
  border: 1px solid rgba(201, 162, 39, 0.30);
}

.badge--navy {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.badge--success {
  background: rgba(34, 197, 94, 0.12);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.25);
}

.badge .live-dot {
  width: 6px;
  height: 6px;
  background: currentColor;
  border-radius: 50%;
  animation: pulse-gold 2s infinite;
}

/* Pills */
.pill {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.pill:hover {
  border-color: var(--border-accent);
  color: var(--gold-300);
}

/* ╔═══════════════════════════════════════════════╗
   ║  CARD BASE (formerly Glass Card)              ║
   ╚═══════════════════════════════════════════════╝ */
.glass-card {
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  transition: var(--transition-slow);
}

.glass-card:hover {
  border-color: var(--border-mid);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

/* ╔═══════════════════════════════════════════════╗
   ║  PHASE TABS                                   ║
   ╚═══════════════════════════════════════════════╝ */
.tabs {
  display: flex;
  gap: var(--space-2);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-2);
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar { display: none; }

.tab-btn {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  background: none;
  border: none;
  border-radius: var(--radius-lg);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-secondary);
  background: rgba(255,255,255,0.05);
}

.tab-btn.active {
  background: var(--gradient-gold);
  color: var(--navy-900);
  box-shadow: var(--shadow-gold-sm);
}

.tab-btn__num {
  font-size: var(--text-xs);
  font-weight: 800;
  opacity: 0.7;
}

.tab-btn.active .tab-btn__num {
  opacity: 0.8;
}

.tab-btn__duration {
  font-size: var(--text-xs);
  opacity: 0.7;
}

/* Tab pane */
.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeInUp 0.35s var(--ease-out-expo) both;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Checklist */
.checklist {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  list-style: none;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: var(--text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-snug);
}

.checklist li::before {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 1px;
  background: rgba(201, 162, 39, 0.12);
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-radius: var(--radius-sm);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2 6l3 3 5-5' stroke='%23C9A227' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 12px;
}

/* ╔═══════════════════════════════════════════════╗
   ║  STAT CARD                                    ║
   ╚═══════════════════════════════════════════════╝ */
.stat-card {
  text-align: center;
  padding: var(--space-8) var(--space-6);
  position: relative;
}

.stat-card::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  bottom: 20%;
  width: 1px;
  background: var(--border-subtle);
}

.stat-card:last-child::after { display: none; }

.stat-card__number {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
  font-weight: 800;
  line-height: 1;
  letter-spacing: var(--tracking-tight);
  background: var(--gradient-gold-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
}

.stat-card__label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

/* ╔═══════════════════════════════════════════════╗
   ║  STORY / TESTIMONIAL CARD                     ║
   ╚═══════════════════════════════════════════════╝ */
.story-card {
  flex-shrink: 0;
  width: 340px;
  padding: var(--space-8);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.story-card__quote-icon {
  color: var(--gold-400);
  font-size: var(--text-4xl);
  line-height: 1;
  font-family: Georgia, serif;
  opacity: 0.6;
  margin-bottom: calc(-1 * var(--space-3));
}

.story-card__quote {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  font-style: italic;
  margin: 0;
}

.story-card__author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: auto;
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-subtle);
}

.story-card__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-accent);
  flex-shrink: 0;
  background: var(--navy-700);
}

.story-card__name {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.story-card__cohort {
  font-size: var(--text-xs);
  color: var(--gold-400);
  margin: 0;
}

/* ╔═══════════════════════════════════════════════╗
   ║  FEATURE / WHY CARDS                          ║
   ╚═══════════════════════════════════════════════╝ */
.feature-card {
  padding: var(--space-8);
  background: var(--surface-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  transition: var(--transition-slow);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-slow) var(--ease-out-expo);
}

.feature-card:hover {
  border-color: var(--border-accent);
  background: rgba(255,255,255,0.07);
  transform: translateY(-6px);
  box-shadow: var(--shadow-gold-sm), var(--shadow-lg);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card__num {
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: var(--tracking-widest);
  color: var(--gold-400);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  opacity: 0.8;
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: rgba(201, 162, 39, 0.10);
  border: 1px solid rgba(201, 162, 39, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  margin-bottom: var(--space-5);
}

.feature-card h3,
.feature-card h4 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  line-height: var(--leading-snug);
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
  margin: 0;
}

/* Hero card variant */
.feature-card--hero {
  grid-column: span 2;
  background: linear-gradient(135deg,
    rgba(201, 162, 39, 0.08) 0%,
    rgba(255,255,255,0.04) 100%);
  border-color: var(--border-accent);
}

.feature-card--hero::before {
  transform: scaleX(1);
}

@media (max-width: 768px) {
  .feature-card--hero { grid-column: span 1; }
}

/* ╔═══════════════════════════════════════════════╗
   ║  MARQUEE (Testimonials scroll)                ║
   ╚═══════════════════════════════════════════════╝ */
.marquee {
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(
    to right,
    transparent 0%,
    black 10%,
    black 90%,
    transparent 100%
  );
  -webkit-mask-image: linear-gradient(
    to right,
    transparent 0%,
    black 10%,
    black 90%,
    transparent 100%
  );
}

.marquee__track {
  display: flex;
  gap: var(--space-6);
  width: max-content;
  animation: marquee 36s linear infinite;
}

.marquee:hover .marquee__track {
  animation-play-state: paused;
}

/* ╔═══════════════════════════════════════════════╗
   ║  FOOTER                                       ║
   ╚═══════════════════════════════════════════════╝ */
.footer {
  background: var(--navy-900);
  border-top: 1px solid var(--border-subtle);
  padding-block: var(--space-16) var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__brand .nav__logo {
  height: 52px;
  margin-bottom: var(--space-4);
}

.footer__tagline {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.footer__social-link:hover {
  background: rgba(201,162,39,0.10);
  border-color: var(--border-accent);
  color: var(--gold-400);
}

.footer__heading {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--gold-400);
  margin-bottom: var(--space-5);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  list-style: none;
}

.footer__link {
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.footer__link:hover {
  color: var(--text-primary);
  padding-left: var(--space-2);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin: 0;
}

.footer__legal {
  display: flex;
  gap: var(--space-6);
}

.footer__legal a {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.footer__legal a:hover {
  color: var(--gold-400);
}

@media (max-width: 900px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 600px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }
  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ╔═══════════════════════════════════════════════╗
   ║  BACK TO TOP                                  ║
   ╚═══════════════════════════════════════════════╝ */
.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: 500;
  width: 48px;
  height: 48px;
  background: var(--gradient-gold);
  color: var(--navy-900);
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-base);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--duration-base) var(--ease-out-expo),
              visibility var(--duration-base),
              transform var(--duration-base) var(--ease-out-expo),
              box-shadow var(--duration-base);
  box-shadow: var(--shadow-gold-sm);
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-gold);
}