/* ==========================================================================
   Cinematic Scroll-Driven Portfolio — Styles
   ========================================================================== */

@property --mask {
  syntax: "<angle>";
  inherits: false;
  initial-value: 33deg;
}

:root {
  --bg: #0a0a0b;
  --fg: #f0f2f8;
  --fg-muted: rgba(240, 242, 248, 0.62);
  --accent: #8b9dff;

  --shimmer-hue-1: 213deg;
  --shimmer-sat-1: 95%;
  --shimmer-lit-1: 91%;
  --shimmer-hue-2: 248deg;
  --shimmer-sat-2: 100%;
  --shimmer-lit-2: 86%;
  --shimmer-hue-3: 293deg;
  --shimmer-sat-3: 78%;
  --shimmer-lit-3: 89%;
  --glow-hue: 222deg;

  --spring-easing: linear(
    0, 0.002, 0.01 0.9%, 0.038 1.8%, 0.156, 0.312 5.8%, 0.789 11.1%, 1.015 14.2%,
    1.096, 1.157, 1.199, 1.224 20.3%, 1.231, 1.231, 1.226, 1.214 24.6%,
    1.176 26.9%, 1.057 32.6%, 1.007 35.5%, 0.984, 0.968, 0.956, 0.949 42%,
    0.946 44.1%, 0.95 46.5%, 0.998 57.2%, 1.007, 1.011 63.3%, 1.012 68.3%,
    0.998 84%, 1
  );
  --spring-duration: 1.33s;

  --header-h: 120px;
  --glass-radius: 28px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes spin-glow {
  0%   { --mask: 0deg; }
  100% { --mask: 360deg; }
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.35; transform: scaleY(0.6); }
  50%      { opacity: 1; transform: scaleY(1); }
}

/* Reset & base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  overflow: hidden;
  font-family: "Outfit", system-ui, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.is-transitioning {
  cursor: progress;
}

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

/* ==========================================================================
   Video stage
   ========================================================================== */

.video-stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: #000;
}

.scroll-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.04) translateZ(0);
  filter: grayscale(100%) blur(2px);
}

.video-soften {
  position: absolute;
  inset: 0;
  pointer-events: none;
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  background: rgba(0, 0, 0, 0.04);
}

.scene-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background-color: #0a0a0b;
  opacity: 1;
  will-change: opacity, background-color;
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  pointer-events: none;
}

.logo {
  position: fixed;
  top: 32px;
  left: 40px;
  z-index: 101;
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: auto;
  transition: opacity 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}

.logo:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  font-family: "Syne", sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.logo-text {
  font-family: "Syne", sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.site-nav {
  position: fixed;
  top: 72px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 101;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0;
  background: none;
  border: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  pointer-events: auto;
}

.nav-link {
  position: relative;
  padding: 10px 20px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  border-radius: 100px;
  transition: color 0.35s var(--ease-out), background 0.35s var(--ease-out);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 6px;
  left: 50%;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, hsl(var(--shimmer-hue-1), 80%, 75%), hsl(var(--shimmer-hue-2), 90%, 80%));
  transform: translateX(-50%);
  transition: width 0.4s var(--spring-easing);
}

.nav-link:hover {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: var(--fg);
}

.nav-link.active::after {
  width: 20px;
}

/* ==========================================================================
   Content stage
   ========================================================================== */

.content-stage {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--header-h) 40px 60px;
  pointer-events: none;
}

.chapter {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: inherit;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  will-change: opacity, transform;
}

.chapter.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ==========================================================================
   Glass panel with spin glow edge
   ========================================================================== */

.glass-panel {
  position: relative;
  isolation: isolate;
  width: min(680px, 92vw);
  padding: 48px 52px;
  border-radius: var(--glass-radius);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.07) 0%, rgba(255, 255, 255, 0.02) 50%, rgba(255, 255, 255, 0.01) 100%);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow:
    0 24px 80px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transform: translateZ(0);
}

.glass-panel--wide {
  width: min(860px, 94vw);
  padding: 44px 48px;
}

.glass-panel--hero {
  text-align: center;
}

.home-content {
  position: relative;
  z-index: 2;
  width: min(680px, 92vw);
  padding: 48px 52px;
  text-align: center;
  color: var(--fg);
  pointer-events: auto;
}

.home-content__inner {
  position: relative;
  z-index: 2;
}

.glass-panel--contact {
  width: min(580px, 92vw);
}

.glass-inner {
  position: relative;
  z-index: 2;
}

/* Spin glow shimmer — adapted from multiple-glow-effects-button */
.glass-shimmer {
  position: absolute;
  inset: -3px;
  border-radius: inherit;
  mix-blend-mode: plus-lighter;
  pointer-events: none;
  z-index: 1;
  -webkit-mask-image: conic-gradient(
    from var(--mask, 0deg),
    transparent 0%,
    transparent 10%,
    black 36%,
    black 45%,
    transparent 50%,
    transparent 60%,
    black 85%,
    black 95%,
    transparent 100%
  );
  mask-image: conic-gradient(
    from var(--mask, 0deg),
    transparent 0%,
    transparent 10%,
    black 36%,
    black 45%,
    transparent 50%,
    transparent 60%,
    black 85%,
    black 95%,
    transparent 100%
  );
  -webkit-mask-size: cover;
  mask-size: cover;
  animation: spin-glow 4s linear infinite;
}

.glass-shimmer::before,
.glass-shimmer::after {
  content: "";
  position: absolute;
  border-radius: inherit;
  opacity: 0.85;
}

.glass-shimmer::before {
  inset: 0;
  box-shadow:
    0 0 4px 2px hsl(var(--shimmer-hue-1) 20% 95% / 0.6),
    0 0 10px 5px hsl(var(--shimmer-hue-1) 20% 80% / 0.35),
    0 0 20px 10px hsl(var(--shimmer-hue-2) 40% 60% / 0.25),
    0 0 35px 12px hsl(var(--shimmer-hue-2) 20% 40% / 0.15);
  z-index: -1;
}

.glass-shimmer::after {
  inset: 1px;
  box-shadow:
    inset 0 0 0 1px hsl(var(--shimmer-hue-2) 70% 95% / 0.5),
    inset 0 0 4px 1px hsl(var(--shimmer-hue-2) 100% 80% / 0.3),
    inset 0 0 12px 2px hsl(var(--shimmer-hue-3) 80% 70% / 0.15);
  z-index: 2;
}

/* Typography */
.eyebrow {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: hsl(var(--shimmer-hue-2), 70%, 78%);
  margin-bottom: 20px;
}

.headline {
  font-family: "Syne", sans-serif;
  font-weight: 700;
  font-size: clamp(2.4rem, 5.5vw, 3.8rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.headline em {
  font-style: normal;
  background: linear-gradient(
    120deg,
    hsl(var(--shimmer-hue-1), 90%, 82%),
    hsl(var(--shimmer-hue-2), 95%, 88%),
    hsl(var(--shimmer-hue-3), 80%, 85%)
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.headline--sm {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
}

.lede, .body-text {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--fg-muted);
  max-width: 52ch;
  margin: 0 auto 32px;
  line-height: 1.75;
}

.body-text {
  margin: 0 0 36px;
  text-align: left;
}

/* Services grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.service-card {
  padding: 24px 20px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.35s var(--ease-out), border-color 0.35s var(--ease-out), transform 0.35s var(--ease-out);
}

.service-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-3px);
}

.service-num {
  display: block;
  font-family: "Syne", sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: hsl(var(--shimmer-hue-2), 60%, 70%);
  margin-bottom: 12px;
}

.service-card h3 {
  font-family: "Syne", sans-serif;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.service-card p {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.55;
}

/* CTA button with glow */
.cta-btn {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 100px;
  background: linear-gradient(
    315deg,
    hsl(var(--shimmer-hue-1), var(--shimmer-sat-1), var(--shimmer-lit-1)) 0%,
    hsl(var(--shimmer-hue-2), var(--shimmer-sat-2), var(--shimmer-lit-2)) 47%,
    hsl(var(--shimmer-hue-3), var(--shimmer-sat-3), var(--shimmer-lit-3)) 100%
  );
  box-shadow: 0 4px 20px hsl(var(--glow-hue) 50% 20% / 40%);
  transition: transform var(--spring-duration) var(--spring-easing);
}

.cta-btn:hover {
  transform: scale(1.06);
}

.cta-btn:active {
  transform: scale(1.02);
}

.cta-text {
  position: relative;
  z-index: 2;
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  color: #0a0b10;
}

.cta-shimmer {
  position: absolute;
  inset: -20px;
  border-radius: inherit;
  mix-blend-mode: plus-lighter;
  pointer-events: none;
  -webkit-mask-image: conic-gradient(
    from var(--mask, 0deg),
    transparent 0%, transparent 10%,
    black 36%, black 45%,
    transparent 50%, transparent 60%,
    black 85%, black 95%, transparent 100%
  );
  mask-image: conic-gradient(
    from var(--mask, 0deg),
    transparent 0%, transparent 10%,
    black 36%, black 45%,
    transparent 50%, transparent 60%,
    black 85%, black 95%, transparent 100%
  );
  -webkit-mask-size: cover;
  mask-size: cover;
  animation: spin-glow 3s linear infinite;
}

.cta-shimmer::before {
  content: "";
  position: absolute;
  inset: 20px;
  border-radius: inherit;
  box-shadow:
    0 0 6px 3px hsl(var(--shimmer-hue-1) 20% 95% / 0.7),
    0 0 14px 6px hsl(var(--shimmer-hue-2) 40% 70% / 0.4);
}

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 14px 18px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.25);
  color: var(--fg);
  font: inherit;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
  resize: vertical;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: rgba(240, 242, 248, 0.3);
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: hsl(var(--shimmer-hue-2), 60%, 65% / 0.6);
  box-shadow: 0 0 0 3px hsl(var(--shimmer-hue-2) 60% 50% / 0.12);
}

.cta-btn--submit {
  align-self: flex-start;
  margin-top: 8px;
}

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(240, 242, 248, 0.4);
  transition: opacity 0.5s var(--ease-out);
}

.scroll-hint__line {
  display: block;
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, transparent, rgba(240, 242, 248, 0.5));
  animation: scroll-pulse 2s ease-in-out infinite;
}

/* Section rail — vertical line with moving thumb */
.section-rail {
  position: fixed;
  right: 32px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  width: 28px;
  height: 112px;
  pointer-events: none;
}

.section-rail__track {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
}

.section-rail__line {
  display: block;
  width: 1px;
  height: 100%;
  background: linear-gradient(
    180deg,
    transparent,
    rgba(240, 242, 248, 0.45) 18%,
    rgba(240, 242, 248, 0.45) 82%,
    transparent
  );
}

.section-rail__thumb {
  position: absolute;
  left: 50%;
  top: 0%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: hsl(var(--shimmer-hue-2), 80%, 78%);
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow: 0 0 10px hsl(var(--shimmer-hue-2) 80% 70% / 0.55);
  transform: translate(-50%, -50%);
  pointer-events: none;
  will-change: top;
}

.section-rail__hit {
  position: absolute;
  left: 0;
  width: 100%;
  height: 33.333%;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  pointer-events: auto;
}

.section-rail__hit:nth-child(2) {
  top: 0;
}

.section-rail__hit:nth-child(3) {
  top: 33.333%;
}

.section-rail__hit:nth-child(4) {
  top: 66.666%;
}

.section-rail__hit:hover {
  cursor: pointer;
}

.section-rail.is-ready {
  pointer-events: auto;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
  .logo {
    left: 24px;
    top: 24px;
  }

  .logo-text {
    display: none;
  }

  .site-nav {
    top: auto;
    bottom: 24px;
    padding: 0;
    gap: 4px;
    max-width: calc(100vw - 32px);
    overflow-x: auto;
    scrollbar-width: none;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .nav-link {
    padding: 8px 14px;
    font-size: 0.68rem;
    white-space: nowrap;
  }

  .content-stage {
    padding: 100px 20px 100px;
  }

  .glass-panel,
  .glass-panel--wide,
  .glass-panel--contact {
    padding: 32px 28px;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .section-rail {
    right: 16px;
    height: 96px;
  }

  .scroll-hint {
    bottom: 90px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .glass-shimmer,
  .cta-shimmer {
    animation: none;
  }

  .scroll-hint__line {
    animation: none;
    opacity: 0.5;
  }
}