/**
 * CodeViura — custom styles layered on Tailwind CDN
 * - Page shell, scroll reveal, service + alumni row polish
 * - Film grain, skip link, scroll progress, header + nav spy, back-to-top
 * - Full-page boot loader (fonts + window load)
 * - Light / dark theme (Tailwind `class` strategy)
 * - Reduced motion support
 */

/* -------------------------------------------------------------------------- */
/* Root & base                                                                */
/* -------------------------------------------------------------------------- */

:root {
  color-scheme: light dark;
  --reveal-distance: 28px;
  --reveal-duration: 0.7s;
  --reveal-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --lift-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.55);
  /* Full-width feel on large / ultrawide monitors */
  --page-max: min(100%, 110rem);
  --page-pad: clamp(1rem, 5vw, 4.5rem);
}

/**
 * Horizontally centers content with a generous max width and fluid side padding.
 * Use on nav + every major section inner wrapper so columns align edge-to-edge.
 */
.page-shell {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--page-pad);
}

html {
  scroll-behavior: smooth;
  color-scheme: light dark;
}

html.dark {
  color-scheme: dark;
}

html:not(.dark) {
  color-scheme: light;
}

body {
  min-height: 100dvh;
  position: relative;
}

/* Ultra-light film grain — sits behind page content */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.045;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

#top {
  position: relative;
  z-index: 1;
}

/* -------------------------------------------------------------------------- */
/* Full-page loader                                                           */
/* -------------------------------------------------------------------------- */

html.is-booting body {
  overflow: hidden;
}

.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9990;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(120% 90% at 50% 35%, rgba(24, 32, 48, 0.97), #0a0a0a 58%);
  transition:
    opacity 0.55s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1),
    visibility 0s linear 0.55s;
}

.page-loader.page-loader--done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: scale(1.012);
}

.page-loader__noise {
  position: absolute;
  inset: 0;
  opacity: 0.055;
  mix-blend-mode: overlay;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.page-loader__glow {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(110px);
}

.page-loader__glow--a {
  width: min(92vw, 760px);
  height: min(62vh, 500px);
  left: 50%;
  top: 36%;
  transform: translate(-50%, -50%);
  background: rgba(34, 211, 238, 0.16);
  animation: page-loader-glow-pulse 3.4s ease-in-out infinite;
}

.page-loader__glow--b {
  width: min(70vw, 520px);
  height: min(45vh, 380px);
  left: 58%;
  top: 58%;
  transform: translate(-50%, -50%);
  background: rgba(59, 130, 246, 0.14);
  animation: page-loader-glow-pulse 3.4s ease-in-out infinite reverse;
  animation-delay: 0.5s;
}

@keyframes page-loader-glow-pulse {
  0%,
  100% {
    opacity: 0.55;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.06);
  }
}

.page-loader__content {
  position: relative;
  z-index: 2;
  max-width: 32rem;
  padding: 1.5rem 1.25rem;
  text-align: center;
}

.page-loader__mark {
  position: relative;
  width: 5.5rem;
  height: 5.5rem;
  margin: 0 auto 1.35rem;
}

@media (min-width: 640px) {
  .page-loader__mark {
    width: 6.25rem;
    height: 6.25rem;
    margin-bottom: 1.5rem;
  }
}

.page-loader__orbit {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.07);
  border-top-color: rgba(34, 211, 238, 0.95);
  border-right-color: rgba(59, 130, 246, 0.45);
  animation: page-loader-spin 1.05s linear infinite;
}

.page-loader__glyph {
  position: absolute;
  inset: 0.55rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 1rem;
  background: linear-gradient(145deg, rgba(34, 211, 238, 0.14), rgba(59, 130, 246, 0.1));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 20px 50px rgba(0, 0, 0, 0.45);
  font-size: 1.65rem;
  font-weight: 700;
  color: #ecfeff;
  letter-spacing: -0.02em;
}

@media (min-width: 640px) {
  .page-loader__glyph {
    inset: 0.65rem;
    font-size: 1.85rem;
    border-radius: 1.125rem;
  }
}

@keyframes page-loader-spin {
  to {
    transform: rotate(360deg);
  }
}

.page-loader__brand {
  margin: 0 0 0.4rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.42em;
  color: #a1a1aa;
}

@media (min-width: 640px) {
  .page-loader__brand {
    font-size: 0.8rem;
    letter-spacing: 0.45em;
  }
}

.page-loader__tagline {
  margin: 0 0 1.35rem;
  font-size: 1rem;
  line-height: 1.55;
  font-weight: 500;
  color: #e4e4e7;
}

@media (min-width: 640px) {
  .page-loader__tagline {
    font-size: 1.15rem;
  }
}

.page-loader__hint {
  margin: 0;
  font-size: 0.8125rem;
  color: #71717a;
}

.page-loader__hint-shimmer {
  display: inline-block;
  background: linear-gradient(90deg, #52525c 0%, #fafafa 45%, #52525c 90%);
  background-size: 220% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  animation: page-loader-shimmer 2.6s linear infinite;
}

@keyframes page-loader-shimmer {
  to {
    background-position: 200% center;
  }
}

.page-loader__track {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  height: 3px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.06);
}

.page-loader__bar {
  height: 100%;
  width: 42%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(34, 211, 238, 0.25),
    rgba(34, 211, 238, 0.95),
    rgba(59, 130, 246, 0.95),
    rgba(34, 211, 238, 0.25),
    transparent
  );
  animation: page-loader-sweep 1.35s ease-in-out infinite;
  filter: drop-shadow(0 0 10px rgba(34, 211, 238, 0.45));
}

@keyframes page-loader-sweep {
  0% {
    transform: translate3d(-130%, 0, 0);
  }
  100% {
    transform: translate3d(320%, 0, 0);
  }
}

/* Skip link — visible on keyboard focus */
.skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  z-index: 10050;
  padding: 0.65rem 1rem;
  border-radius: 0.5rem;
  background: #fafafa;
  color: #0a0a0a;
  font-weight: 600;
  font-size: 0.875rem;
  transform: translateY(-220%);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
  outline: none;
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.55);
}

/* Header after scroll */
.site-header.is-scrolled {
  background-color: rgba(10, 10, 10, 0.88);
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
}

html:not(.dark) .site-header.is-scrolled {
  background-color: rgba(255, 255, 255, 0.94);
  border-color: rgba(24, 24, 27, 0.12);
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.1);
}

/* Back to top */
.site-backtotop {
  opacity: 0;
  visibility: hidden;
  transform: translate3d(0, 12px, 0);
  pointer-events: none;
}

.site-backtotop.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translate3d(0, 0, 0);
  pointer-events: auto;
}

/* Hero headline — slow gradient drift (GPU-friendly) */
@media (prefers-reduced-motion: no-preference) {
  .hero-title {
    background-size: 100% 200%;
    animation: hero-title-drift 14s ease-in-out infinite;
  }

  @keyframes hero-title-drift {
    0%,
    100% {
      background-position: 50% 0%;
    }
    50% {
      background-position: 50% 100%;
    }
  }
}

/* Selection — theme aware (body Tailwind selection utilities complement this) */
::selection {
  background: rgba(6, 182, 212, 0.22);
  color: #0a0a0a;
}

html.dark ::selection {
  background: rgba(34, 211, 238, 0.25);
  color: #fafafa;
}

/* Focus visibility for keyboard users */
a:focus-visible,
button:focus-visible {
  outline: 2px solid rgba(34, 211, 238, 0.7);
  outline-offset: 3px;
}

/* -------------------------------------------------------------------------- */
/* Scroll reveal (initial state → .is-visible)                                */
/* -------------------------------------------------------------------------- */

.reveal,
.reveal-delay {
  opacity: 0;
  transform: translate3d(0, var(--reveal-distance), 0);
  filter: blur(4px);
  transition:
    opacity var(--reveal-duration) var(--reveal-ease),
    transform var(--reveal-duration) var(--reveal-ease),
    filter var(--reveal-duration) var(--reveal-ease);
  will-change: opacity, transform, filter;
}

.reveal-delay {
  transition-delay: 0.12s;
}

.reveal.is-visible,
.reveal-delay.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  filter: blur(0);
}

/* Stagger children inside grids (optional progressive feel) */
.reveal.service-card:nth-child(1) {
  transition-delay: 0s;
}
.reveal.service-card:nth-child(2) {
  transition-delay: 0.08s;
}
.reveal.service-card:nth-child(3) {
  transition-delay: 0.16s;
}

.reveal.alumni-row:nth-child(1) {
  transition-delay: 0s;
}
.reveal.alumni-row:nth-child(2) {
  transition-delay: 0.07s;
}
.reveal.alumni-row:nth-child(3) {
  transition-delay: 0.14s;
}

/* -------------------------------------------------------------------------- */
/* Service cards — hover lift (transform owned by .reveal / .is-visible)       */
/* -------------------------------------------------------------------------- */

.service-card {
  transition:
    border-color 0.25s ease,
    box-shadow 0.35s ease;
}

@media (hover: hover) and (pointer: fine) {
  .service-card.is-visible:hover {
    transform: translate3d(0, -6px, 0);
    border-color: rgba(34, 211, 238, 0.22);
    box-shadow: var(--lift-shadow), 0 0 0 1px rgba(34, 211, 238, 0.08);
  }
}

/* -------------------------------------------------------------------------- */
/* Director Cards & Buttons — smooth hover                                    */
/* -------------------------------------------------------------------------- */

.btn-glow {
  position: relative;
  z-index: 1;
}

.btn-glow::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  background: inherit;
  filter: blur(14px);
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: -1;
}

.btn-glow:hover::after {
  opacity: 0.65;
}

.director-card {
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.5s ease, border-color 0.5s ease;
}

@media (hover: hover) and (pointer: fine) {
  .director-card.is-visible:hover {
    transform: translate3d(0, -10px, 0);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(34, 211, 238, 0.1);
  }
  html.dark .director-card.is-visible:hover {
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(34, 211, 238, 0.2);
  }
}

/* -------------------------------------------------------------------------- */
/* Alumni-style project rows — subtle hover                                   */
/* -------------------------------------------------------------------------- */

.alumni-row {
  transition:
    opacity var(--reveal-duration) var(--reveal-ease),
    transform var(--reveal-duration) var(--reveal-ease),
    filter var(--reveal-duration) var(--reveal-ease),
    background-color 0.25s ease;
}

@media (hover: hover) and (pointer: fine) {
  .alumni-row:hover {
    background-color: rgba(255, 255, 255, 0.03);
  }
}

/* -------------------------------------------------------------------------- */
/* Nav link underline (subtle)                                              */
/* -------------------------------------------------------------------------- */

.nav-link {
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, rgb(34, 211, 238), rgb(59, 130, 246));
  transition: transform 0.25s ease;
  border-radius: 999px;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

/* Scroll spy — current section */
.nav-link.is-active {
  color: #fafafa;
}

.nav-link.is-active::after {
  transform: scaleX(1);
}

.mobile-nav-link.is-active {
  color: #fafafa;
  background-color: rgba(255, 255, 255, 0.06);
}

html:not(.dark) .nav-link.is-active {
  color: #0a0a0a;
}

html:not(.dark) .mobile-nav-link.is-active {
  color: #0a0a0a;
  background-color: rgba(24, 24, 27, 0.06);
}

@media (hover: hover) and (pointer: fine) {
  html:not(.dark) .alumni-row:hover {
    background-color: rgba(24, 24, 27, 0.04);
  }
}

/* -------------------------------------------------------------------------- */
/* Page loader — light theme                                                  */
/* -------------------------------------------------------------------------- */

html:not(.dark) .page-loader {
  background: radial-gradient(120% 95% at 50% 32%, #ffffff 0%, #f4f4f5 52%, #e4e4e7 100%);
}

html:not(.dark) .page-loader__brand {
  color: #52525c;
}

html:not(.dark) .page-loader__tagline {
  color: #3f3f46;
}

html:not(.dark) .page-loader__hint {
  color: #71717a;
}

html:not(.dark) .page-loader__glyph {
  color: #0f172a;
  background: linear-gradient(145deg, rgba(6, 182, 212, 0.18), rgba(59, 130, 246, 0.14));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.65),
    0 18px 44px rgba(15, 23, 42, 0.12);
}

html:not(.dark) .page-loader__orbit {
  border-color: rgba(24, 24, 27, 0.1);
  border-top-color: rgba(8, 145, 178, 0.95);
  border-right-color: rgba(37, 99, 235, 0.45);
}

html:not(.dark) .page-loader__track {
  background: rgba(24, 24, 27, 0.08);
}

/* -------------------------------------------------------------------------- */
/* Accessibility: respect reduced motion                                      */
/* -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal,
  .reveal-delay,
  .service-card,
  .alumni-row {
    transition: none !important;
    filter: none !important;
    transform: none !important;
    opacity: 1 !important;
  }

  .nav-link::after {
    transition: none;
  }

  .hero-title {
    animation: none !important;
    background-size: auto !important;
  }

  #scroll-progress-bar {
    transition: none !important;
  }

  .site-backtotop {
    transition: none !important;
  }

  .page-loader__orbit {
    animation: none !important;
  }

  .page-loader__glow--a,
  .page-loader__glow--b {
    animation: none !important;
    opacity: 0.75;
  }

  .page-loader__hint-shimmer {
    animation: none !important;
    color: #a1a1aa !important;
    background: none !important;
    -webkit-text-fill-color: #a1a1aa !important;
    background-clip: border-box !important;
  }

  .page-loader__bar {
    animation: none !important;
    width: 100%;
    transform: none !important;
    opacity: 0.45;
  }

  .page-loader {
    transition-duration: 0.18s !important;
  }

  .page-loader.page-loader--done {
    transform: none !important;
  }
}