/* ============================================================
   GLASS.CSS — Liquid Glassmorphism System
   Kabongelo Portfolio v6.0
   Apple-inspired architectural glass components
   ============================================================ */

/* ── CSS CUSTOM PROPERTIES ── */
:root {
  --glass-bg:          rgba(17, 17, 31, 0.55);
  --glass-bg-light:    rgba(240, 240, 250, 0.04);
  --glass-bg-heavy:    rgba(17, 17, 31, 0.80);
  --glass-border:      rgba(240, 240, 250, 0.10);
  --glass-border-cyan: rgba(0, 245, 195, 0.22);
  --glass-border-gold: rgba(255, 184, 77, 0.22);
  --glass-shadow:      0 8px 32px rgba(0, 0, 0, 0.35), inset 0 0.5px 0 rgba(240, 240, 250, 0.08);
  --glass-shadow-lg:   0 24px 64px rgba(0, 0, 0, 0.50), inset 0 1px 0 rgba(240, 240, 250, 0.10);
  --glass-blur:        blur(24px) saturate(180%) brightness(1.04);
  --glass-blur-heavy:  blur(36px) saturate(200%) brightness(1.06);
  --glass-blur-light:  blur(16px) saturate(160%);
  --spring:            cubic-bezier(0.34, 1.15, 0.64, 1);
  --spring-soft:       cubic-bezier(0.25, 1.0, 0.5, 1);
  --ease-expo:         cubic-bezier(0.19, 1, 0.22, 1);
}

/* ══════════════════════════════════════════════════════════════
   BASE GLASS PRIMITIVES
   ══════════════════════════════════════════════════════════════ */

.glass {
  background:              var(--glass-bg);
  backdrop-filter:         var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border:                  0.5px solid var(--glass-border);
  box-shadow:              var(--glass-shadow);
}

.glass-card {
  background:              rgba(17, 17, 31, 0.65);
  backdrop-filter:         var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border:                  0.5px solid var(--glass-border);
  box-shadow:              var(--glass-shadow-lg);
  transition:
    border-color 0.4s var(--ease-expo),
    box-shadow   0.4s var(--ease-expo),
    transform    0.5s var(--spring);
}

.glass-card:hover {
  border-color: rgba(240, 240, 250, 0.18);
  box-shadow:
    0 32px 80px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 rgba(240, 240, 250, 0.14),
    0 0 60px rgba(0, 245, 195, 0.04);
}

.glass-panel {
  background:              var(--glass-bg-heavy);
  backdrop-filter:         var(--glass-blur-heavy);
  -webkit-backdrop-filter: var(--glass-blur-heavy);
  border:                  0.5px solid var(--glass-border);
  box-shadow:              var(--glass-shadow-lg);
}

.glass-light {
  background:              var(--glass-bg-light);
  backdrop-filter:         var(--glass-blur-light);
  -webkit-backdrop-filter: var(--glass-blur-light);
  border:                  0.5px solid rgba(240, 240, 250, 0.06);
  box-shadow:              inset 0 0.5px 0 rgba(240, 240, 250, 0.05);
}

.glass-cyan {
  background:              rgba(0, 245, 195, 0.05);
  backdrop-filter:         blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  border:                  0.5px solid var(--glass-border-cyan);
  box-shadow:
    inset 0 0.5px 0 rgba(0, 245, 195, 0.12),
    0 4px 20px rgba(0, 245, 195, 0.06);
}

.glass-gold {
  background:              rgba(255, 184, 77, 0.05);
  backdrop-filter:         blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  border:                  0.5px solid var(--glass-border-gold);
  box-shadow:
    inset 0 0.5px 0 rgba(255, 184, 77, 0.12),
    0 4px 20px rgba(255, 184, 77, 0.06);
}

/* ── Fallback: no backdrop-filter support ── */
@supports not (backdrop-filter: blur(1px)) {
  .glass,
  .glass-card,
  .glass-panel,
  .glass-light,
  .glass-cyan,
  .glass-gold { background: rgba(11, 11, 22, 0.95); }
}

/* ── Mobile: reduce blur for performance ── */
@media (max-width: 768px) {
  :root {
    --glass-blur:       blur(12px) saturate(150%);
    --glass-blur-heavy: blur(18px) saturate(160%);
    --glass-blur-light: blur(8px)  saturate(140%);
  }
}

/* ── Reduce motion: disable all glass blur transitions ── */
@media (prefers-reduced-motion: reduce) {
  .glass,
  .glass-card,
  .glass-panel,
  .glass-light,
  .glass-cyan,
  .glass-gold {
    backdrop-filter:         none;
    -webkit-backdrop-filter: none;
    background:              rgba(11, 11, 22, 0.95);
    transition:              none !important;
  }
  .glass-parallax { transform: none !important; }
}

/* ══════════════════════════════════════════════════════════════
   GLASS NAVBAR (enhances existing #navbar.scrolled)
   ══════════════════════════════════════════════════════════════ */

#navbar.scrolled {
  backdrop-filter:         blur(28px) saturate(200%) brightness(1.05);
  -webkit-backdrop-filter: blur(28px) saturate(200%) brightness(1.05);
  background:              rgba(7, 7, 14, 0.70) !important;
  border-bottom:           0.5px solid var(--glass-border) !important;
  box-shadow:              0 4px 24px rgba(0, 0, 0, 0.25),
                           inset 0 -0.5px 0 rgba(240, 240, 250, 0.04);
}

/* Hamburger button */
.nav-hamburger {
  display:         none;
  flex-direction:  column;
  justify-content: center;
  align-items:     center;
  gap:             5px;
  width:           44px;
  height:          44px;
  background:      transparent;
  border:          0.5px solid var(--glass-border);
  cursor:          pointer;
  padding:         0;
  transition:      border-color 0.3s;
  flex-shrink:     0;
}

.nav-hamburger:hover { border-color: var(--cyan); }

.nav-hamburger span {
  display:          block;
  width:            20px;
  height:           1px;
  background:       var(--white);
  transition:       transform 0.35s var(--spring), opacity 0.2s, width 0.3s;
  transform-origin: center;
}

.nav-hamburger.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-hamburger.active span:nth-child(2) { opacity: 0; width: 0; }
.nav-hamburger.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 900px) { .nav-hamburger { display: flex; } }

/* Active nav link indicator */
.nav-links a[aria-current="page"] {
  color: var(--cyan);
}
.nav-links a[aria-current="page"]::after {
  width: 100% !important;
}

/* ══════════════════════════════════════════════════════════════
   MOBILE NAV DRAWER
   ══════════════════════════════════════════════════════════════ */

.mobile-nav-drawer {
  position:                fixed;
  inset:                   0;
  z-index:                 2000;
  display:                 flex;
  flex-direction:          column;
  justify-content:         center;
  align-items:             center;
  backdrop-filter:         blur(32px) saturate(200%);
  -webkit-backdrop-filter: blur(32px) saturate(200%);
  background:              rgba(7, 7, 14, 0.88);
  border-right:            0.5px solid var(--glass-border);
  pointer-events:          none;
  opacity:                 0;
  transform:               translateX(-100%);
  transition:
    opacity   0.45s var(--ease-expo),
    transform 0.45s var(--ease-expo);
}

.mobile-nav-drawer.open {
  opacity:        1;
  transform:      translateX(0);
  pointer-events: all;
}

.mobile-nav-close {
  position:   absolute;
  top:        24px;
  right:      24px;
  width:      44px;
  height:     44px;
  background: transparent;
  border:     0.5px solid var(--glass-border);
  color:      var(--muted);
  display:    flex;
  align-items:     center;
  justify-content: center;
  cursor:     pointer;
  transition: border-color 0.3s, color 0.3s;
}
.mobile-nav-close:hover { border-color: var(--cyan); color: var(--white); }

.mobile-nav-links {
  list-style: none;
  text-align: center;
  display:    flex;
  flex-direction: column;
  gap: 8px;
  padding: 0;
  margin-bottom: 48px;
}

.mobile-nav-links li {
  opacity:   0;
  transform: translateY(20px);
  transition:
    opacity   0.5s var(--ease-expo),
    transform 0.5s var(--ease-expo);
}

.mobile-nav-drawer.open .mobile-nav-links li:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 0.05s; }
.mobile-nav-drawer.open .mobile-nav-links li:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 0.10s; }
.mobile-nav-drawer.open .mobile-nav-links li:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 0.15s; }
.mobile-nav-drawer.open .mobile-nav-links li:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 0.20s; }
.mobile-nav-drawer.open .mobile-nav-links li:nth-child(5) { opacity: 1; transform: translateY(0); transition-delay: 0.25s; }
.mobile-nav-drawer.open .mobile-nav-links li:nth-child(6) { opacity: 1; transform: translateY(0); transition-delay: 0.30s; }

.mobile-nav-links a {
  font-family:     var(--font-display);
  font-weight:     800;
  font-size:       clamp(32px, 7vw, 52px);
  letter-spacing:  -0.03em;
  color:           var(--muted);
  text-decoration: none;
  display:         block;
  padding:         6px 0;
  transition:      color 0.25s;
  line-height:     1.1;
}
.mobile-nav-links a:hover,
.mobile-nav-links a[aria-current="page"] { color: var(--cyan); }

.mobile-nav-cta {
  opacity:   0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease-expo) 0.38s, transform 0.5s var(--ease-expo) 0.38s;
}
.mobile-nav-drawer.open .mobile-nav-cta { opacity: 1; transform: translateY(0); }

.mobile-nav-meta {
  position:    absolute;
  bottom:      32px;
  font-family: var(--font-mono);
  font-size:   11px;
  letter-spacing: 0.14em;
  color:       rgba(240, 240, 250, 0.25);
  opacity:     0;
  transition:  opacity 0.5s var(--ease-expo) 0.4s;
}
.mobile-nav-drawer.open .mobile-nav-meta { opacity: 1; }

/* ══════════════════════════════════════════════════════════════
   GLASS HERO FLOATING CARD (parallax target)
   ══════════════════════════════════════════════════════════════ */

.glass-hero-card {
  position:  relative;
  padding:   clamp(24px, 3vw, 40px);
  max-width: 380px;
}

.glass-hero-card::before {
  content:  '';
  position: absolute;
  inset:    0;
  border-radius: inherit;
  background: linear-gradient(
    135deg,
    rgba(0, 245, 195, 0.08) 0%,
    rgba(17, 17, 31, 0)     50%,
    rgba(255, 184, 77, 0.05) 100%
  );
  pointer-events: none;
}

/* Architectural corner lines */
.glass-corner {
  position: absolute;
  width:    18px;
  height:   18px;
  border-color: rgba(0, 245, 195, 0.5);
  border-style: solid;
}
.glass-corner.tl { top: -1px;  left: -1px;  border-width: 1px 0 0 1px; }
.glass-corner.tr { top: -1px;  right: -1px; border-width: 1px 1px 0 0; }
.glass-corner.bl { bottom: -1px; left: -1px;   border-width: 0 0 1px 1px; }
.glass-corner.br { bottom: -1px; right: -1px;  border-width: 0 1px 1px 0; }

/* ══════════════════════════════════════════════════════════════
   GLASS STAT CARDS
   ══════════════════════════════════════════════════════════════ */

.glass-stat {
  padding:  clamp(20px, 2.5vw, 32px);
  position: relative;
  overflow: hidden;
}

.glass-stat::after {
  content:    '';
  position:   absolute;
  top:        0;
  left:       0;
  width:      100%;
  height:     2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  transform:  scaleX(0);
  transform-origin: left;
  transition: transform 0.6s var(--ease-expo);
}

.glass-stat.visible::after,
.glass-stat:hover::after { transform: scaleX(1); }

.glass-stat-number {
  font-family:    var(--font-display);
  font-size:      clamp(40px, 5vw, 64px);
  font-weight:    800;
  line-height:    1;
  margin-bottom:  8px;
  background:     linear-gradient(135deg, var(--white) 40%, rgba(240, 240, 250, 0.6));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass-stat-number.cyan {
  background: linear-gradient(135deg, var(--cyan) 0%, rgba(0, 245, 195, 0.6));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass-stat-number.gold {
  background: linear-gradient(135deg, var(--gold) 0%, rgba(255, 184, 77, 0.6));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ══════════════════════════════════════════════════════════════
   GLASS SKILL TAGS
   ══════════════════════════════════════════════════════════════ */

.glass-tag {
  font-family:  var(--font-mono);
  font-size:    11px;
  letter-spacing: 0.08em;
  padding:      7px 14px;
  color:        var(--muted);
  cursor:       default;
  position:     relative;
  overflow:     hidden;
  transition:
    color       0.3s,
    border-color 0.3s,
    transform   0.35s var(--spring);
}

.glass-tag::before {
  content:    '';
  position:   absolute;
  inset:      0;
  background: linear-gradient(135deg, rgba(0, 245, 195, 0.06), transparent);
  opacity:    0;
  transition: opacity 0.3s;
}

.glass-tag:hover {
  color:        var(--cyan);
  border-color: rgba(0, 245, 195, 0.35);
  transform:    translateY(-2px);
}
.glass-tag:hover::before { opacity: 1; }

/* ══════════════════════════════════════════════════════════════
   GLASS AVAILABILITY BADGE
   ══════════════════════════════════════════════════════════════ */

.glass-badge-avail {
  display:        inline-flex;
  align-items:    center;
  gap:            8px;
  padding:        8px 16px;
  font-family:    var(--font-mono);
  font-size:      11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color:          var(--white);
}

.glass-badge-avail .badge-dot {
  width:            8px;
  height:           8px;
  background:       var(--cyan);
  border-radius:    50%;
  flex-shrink:      0;
  animation:        pulseDot 2s ease-in-out infinite;
}

/* ══════════════════════════════════════════════════════════════
   PAGE HERO GLASS OVERLAY
   ══════════════════════════════════════════════════════════════ */

.page-hero-glass {
  position:                absolute;
  inset:                   0;
  backdrop-filter:         blur(0px);
  -webkit-backdrop-filter: blur(0px);
  background:              linear-gradient(
    to bottom,
    rgba(7, 7, 14, 0.30) 0%,
    rgba(7, 7, 14, 0.65) 60%,
    rgba(7, 7, 14, 0.92) 100%
  );
  pointer-events: none;
}

/* ══════════════════════════════════════════════════════════════
   GLASS FILTER TABS (Portfolio page)
   ══════════════════════════════════════════════════════════════ */

.glass-filters {
  display:         flex;
  gap:             4px;
  flex-wrap:       wrap;
  margin-bottom:   clamp(32px, 4vw, 56px);
}

.glass-filter-btn {
  font-family:    var(--font-mono);
  font-size:      11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding:        10px 20px;
  background:     transparent;
  border:         0.5px solid var(--glass-border);
  color:          var(--muted);
  cursor:         pointer;
  transition:
    background    0.3s,
    border-color  0.3s,
    color         0.3s,
    transform     0.3s var(--spring);
}

.glass-filter-btn:hover {
  background:   rgba(240, 240, 250, 0.04);
  border-color: rgba(240, 240, 250, 0.20);
  color:        var(--white);
  transform:    translateY(-1px);
}

.glass-filter-btn.active {
  background:   rgba(0, 245, 195, 0.10);
  border-color: rgba(0, 245, 195, 0.40);
  color:        var(--cyan);
}

/* ══════════════════════════════════════════════════════════════
   GLASS VIDEO PLAYER OVERLAY
   ══════════════════════════════════════════════════════════════ */

.glass-video-wrap {
  position: relative;
  overflow: hidden;
}

.glass-video-overlay {
  position:        absolute;
  inset:           0;
  display:         flex;
  align-items:     center;
  justify-content: center;
  background:      rgba(7, 7, 14, 0.40);
  backdrop-filter: blur(0px);
  transition:
    background    0.4s,
    backdrop-filter 0.4s;
  cursor:          pointer;
}

.glass-video-wrap:hover .glass-video-overlay {
  background:      rgba(7, 7, 14, 0.20);
  backdrop-filter: blur(2px);
}

.glass-play-btn {
  width:            72px;
  height:           72px;
  border-radius:    50%;
  background:       rgba(0, 245, 195, 0.15);
  border:           1px solid rgba(0, 245, 195, 0.40);
  display:          flex;
  align-items:      center;
  justify-content:  center;
  transition:
    transform   0.35s var(--spring),
    background  0.3s,
    box-shadow  0.3s;
  backdrop-filter:  blur(8px);
}

.glass-play-btn svg {
  color:       var(--cyan);
  margin-left: 4px;
  transition:  color 0.3s;
}

.glass-video-wrap:hover .glass-play-btn {
  transform:  scale(1.1);
  background: rgba(0, 245, 195, 0.25);
  box-shadow: 0 0 40px rgba(0, 245, 195, 0.25);
}

/* Video thumb card hover */
.video-thumb-card {
  cursor:   pointer;
  position: relative;
  overflow: hidden;
  transition:
    transform   0.45s var(--spring),
    box-shadow  0.45s;
}

.video-thumb-card:hover {
  transform:  scale(1.02) translateY(-4px);
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 245, 195, 0.06);
}

/* ══════════════════════════════════════════════════════════════
   GLASS VALUE CARDS (About page)
   ══════════════════════════════════════════════════════════════ */

.glass-value-card {
  padding:    clamp(28px, 3vw, 44px);
  position:   relative;
  overflow:   hidden;
  transition:
    transform    0.5s var(--spring),
    border-color 0.4s;
}

.glass-value-card::before {
  content:     '';
  position:    absolute;
  top:         0;
  left:        0;
  right:       0;
  height:      1px;
  background:  linear-gradient(90deg, transparent, var(--cyan), transparent);
  transform:   scaleX(0);
  transition:  transform 0.6s var(--ease-expo);
}

.glass-value-card:hover { transform: translateY(-6px); }
.glass-value-card:hover::before { transform: scaleX(1); }

.glass-value-icon {
  width:           48px;
  height:          48px;
  border:          0.5px solid var(--glass-border-cyan);
  display:         flex;
  align-items:     center;
  justify-content: center;
  margin-bottom:   20px;
  color:           var(--cyan);
  background:      rgba(0, 245, 195, 0.05);
  transition:      background 0.3s, transform 0.35s var(--spring);
}

.glass-value-card:hover .glass-value-icon {
  background:  rgba(0, 245, 195, 0.12);
  transform:   scale(1.1);
}

.glass-value-title {
  font-family:    var(--font-display);
  font-weight:    700;
  font-size:      20px;
  color:          var(--white);
  margin-bottom:  10px;
  letter-spacing: -0.01em;
}

.glass-value-desc {
  font-size:   14px;
  color:       var(--muted);
  line-height: 1.7;
}

/* ══════════════════════════════════════════════════════════════
   GLASS CONTACT PANEL
   ══════════════════════════════════════════════════════════════ */

.glass-contact-item {
  display:         flex;
  align-items:     center;
  gap:             16px;
  padding:         16px 20px;
  text-decoration: none;
  color:           var(--muted);
  font-size:       14px;
  border:          0.5px solid transparent;
  transition:
    border-color  0.3s,
    color         0.3s,
    background    0.3s,
    transform     0.35s var(--spring);
}

.glass-contact-item:hover {
  border-color: rgba(0, 245, 195, 0.25);
  background:   rgba(0, 245, 195, 0.04);
  color:        var(--white);
  transform:    translateX(6px);
}

.glass-contact-icon {
  width:           40px;
  height:          40px;
  border:          0.5px solid var(--glass-border);
  display:         flex;
  align-items:     center;
  justify-content: center;
  flex-shrink:     0;
  color:           var(--cyan);
  background:      rgba(0, 245, 195, 0.04);
  transition:      background 0.3s, border-color 0.3s, transform 0.35s var(--spring);
}

.glass-contact-item:hover .glass-contact-icon {
  background:   rgba(0, 245, 195, 0.12);
  border-color: rgba(0, 245, 195, 0.40);
  transform:    rotate(8deg) scale(1.05);
}

/* ══════════════════════════════════════════════════════════════
   GLASS EDUCATION / LANGUAGE CARDS
   ══════════════════════════════════════════════════════════════ */

.glass-edu-card {
  padding:  clamp(24px, 3vw, 36px);
  position: relative;
}

.glass-edu-card::after {
  content:    '';
  position:   absolute;
  left:       0;
  top:        0;
  bottom:     0;
  width:      2px;
  background: linear-gradient(to bottom, var(--cyan), transparent);
  opacity:    0.4;
  transition: opacity 0.4s;
}

.glass-edu-card:hover::after { opacity: 1; }

/* ══════════════════════════════════════════════════════════════
   GLASS SHIMMER EFFECT (loading / hover highlight)
   ══════════════════════════════════════════════════════════════ */

.glass-shimmer {
  position: relative;
  overflow: hidden;
}

.glass-shimmer::after {
  content:    '';
  position:   absolute;
  top:        0;
  left:       -100%;
  width:      60%;
  height:     100%;
  background: linear-gradient(
    90deg,
    transparent             0%,
    rgba(240, 240, 250, 0.04) 50%,
    transparent             100%
  );
  transform:  skewX(-15deg);
  transition: left 0.0s;
}

.glass-shimmer:hover::after {
  left:       140%;
  transition: left 0.7s var(--ease-expo);
}

/* ══════════════════════════════════════════════════════════════
   GLASS SECTION DIVIDER (architectural line with glow)
   ══════════════════════════════════════════════════════════════ */

.glass-divider {
  width:      100%;
  height:     1px;
  background: linear-gradient(
    90deg,
    transparent         0%,
    var(--glass-border) 20%,
    rgba(0, 245, 195, 0.15) 50%,
    var(--glass-border) 80%,
    transparent         100%
  );
  margin: clamp(32px, 5vw, 64px) 0;
}

/* ══════════════════════════════════════════════════════════════
   GLASS PROJECT CARD ENHANCEMENTS
   ══════════════════════════════════════════════════════════════ */

.project-card.glass-enhanced {
  border: 0.5px solid transparent;
  transition:
    transform    0.5s var(--spring),
    box-shadow   0.5s var(--ease-expo),
    border-color 0.4s;
}

.project-card.glass-enhanced:hover {
  border-color: rgba(0, 245, 195, 0.15);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.6),
    0 0 60px rgba(0, 245, 195, 0.06),
    inset 0 0 0 0.5px rgba(0, 245, 195, 0.08);
}

/* ══════════════════════════════════════════════════════════════
   GLASS PARALLAX ELEMENTS
   ══════════════════════════════════════════════════════════════ */

.glass-parallax {
  will-change: transform;
  transition:  transform 0.1s linear;
}

@media (prefers-reduced-motion: reduce) {
  .glass-parallax { transform: none !important; transition: none; }
}

/* ══════════════════════════════════════════════════════════════
   GLASS PAGE TRANSITION OVERLAY
   ══════════════════════════════════════════════════════════════ */

#page-transition {
  position:        fixed;
  inset:           0;
  z-index:         9000;
  background:      var(--obsidian);
  transform:       translateY(100%);
  pointer-events:  none;
}

#page-transition.entering { transform: translateY(0); transition: transform 0.4s var(--ease-expo); }
#page-transition.leaving  { transform: translateY(-100%); transition: transform 0.4s var(--ease-expo) 0.1s; }