/* ================================
   ZenTab Website - Styles
   Monochromatic Design System
   ================================ */

/* Base: Variables & Design Tokens */
:root {
  /* Border radius */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Shadows - layered for depth */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 2px 6px rgba(0, 0, 0, 0.06);
  --shadow: 0 2px 4px rgba(0, 0, 0, 0.06), 0 8px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.08), 0 12px 24px rgba(0, 0, 0, 0.12), 0 24px 48px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 8px 16px rgba(0, 0, 0, 0.1), 0 20px 40px rgba(0, 0, 0, 0.15);

  /* Backdrop blur */
  --backdrop-blur: 20px;
  --backdrop-blur-sm: 12px;

  /* Transitions */
  --trans-fast: 120ms cubic-bezier(0.4, 0, 0.2, 1);
  --trans: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --trans-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --trans-smooth: 400ms cubic-bezier(0.25, 1, 0.5, 1);

  /* Spacing scale (8px grid) */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Light palette (refined monochrome) */
  --bg: #fafafa;
  --bg-subtle: #f5f5f5;
  --bg-elev: #ffffffee;
  --text: #0a0a0a;
  --text-secondary: #262626;
  --muted: #737373;
  --muted-light: #a3a3a3;
  --border: #e5e5e5;
  --border-subtle: #f0f0f0;
  --accent: #171717;
  --accent-hover: #262626;
}

html[data-theme="dark"] {
  --bg: #0a0a0a;
  --bg-subtle: #141414;
  --bg-elev: #1a1a1aee;
  --text: #fafafa;
  --text-secondary: #e5e5e5;
  --muted: #a3a3a3;
  --muted-light: #737373;
  --border: #262626;
  --border-subtle: #1a1a1a;
  --accent: #fafafa;
  --accent-hover: #e5e5e5;
}

html[data-theme="amoled"] {
  --bg: #000000;
  --bg-subtle: #0a0a0a;
  --bg-elev: #141414ee;
  --text: #ffffff;
  --text-secondary: #f5f5f5;
  --muted: #a3a3a3;
  --muted-light: #737373;
  --border: #1a1a1a;
  --border-subtle: #0f0f0f;
  --accent: #ffffff;
  --accent-hover: #f5f5f5;
}

/* System theme defers to prefers-color-scheme */
@media (prefers-color-scheme: dark) {
  html[data-theme="system"] {
    --bg: #0a0a0a;
    --bg-subtle: #141414;
    --bg-elev: #1a1a1aee;
    --text: #fafafa;
    --text-secondary: #e5e5e5;
    --muted: #a3a3a3;
    --border: #262626;
    --accent: #fafafa;
  }
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  height: 100%;
  font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background:
    radial-gradient(ellipse 1400px 800px at 20% -15%, rgba(0, 0, 0, 0.02), transparent 60%),
    radial-gradient(ellipse 1200px 700px at 80% 15%, rgba(0, 0, 0, 0.015), transparent 60%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-kerning: normal;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1, "tnum" 1;
}

html[data-theme="dark"] body,
html[data-theme="amoled"] body {
  background:
    radial-gradient(ellipse 1400px 800px at 20% -15%, rgba(255, 255, 255, 0.015), transparent 60%),
    radial-gradient(ellipse 1200px 700px at 80% 15%, rgba(255, 255, 255, 0.01), transparent 60%),
    var(--bg);
}

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

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklab, var(--accent) 40%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--trans-fast), text-decoration-color var(--trans-fast), text-underline-offset var(--trans-fast);
}

a:hover {
  color: var(--accent-hover);
  text-decoration-color: currentColor;
  text-underline-offset: 4px;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip:focus {
  left: var(--space-md);
  top: var(--space-md);
  width: auto;
  height: auto;
  background: var(--bg-elev);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  z-index: 9999;
}

/* Lightbox */
.lightbox[hidden] {
  display: none;
}

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: var(--space-lg);
  padding-left: calc(var(--space-lg) + env(safe-area-inset-left));
  padding-right: calc(var(--space-lg) + env(safe-area-inset-right));
  padding-top: calc(var(--space-lg) + env(safe-area-inset-top));
  padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom));
  animation: fadeIn var(--trans) ease-out;
}

.lightbox__img {
  display: block;
  width: auto;
  max-width: min(100%, 1200px);
  height: auto;
  max-height: 90vh;
  object-fit: contain;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  animation: scaleIn var(--trans-slow) cubic-bezier(0.34, 1.56, 0.64, 1);
}

.lightbox__close {
  position: absolute;
  top: calc(var(--space-lg) + env(safe-area-inset-top));
  right: calc(var(--space-lg) + env(safe-area-inset-right));
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all var(--trans);
}

.lightbox__close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Gallery (Screenshots) */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.gallery figure {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elev);
  box-shadow: var(--shadow);
  transition: all var(--trans);
}

.gallery figure:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.gallery .thumb {
  display: block;
  padding: 0;
  border: 0;
  background: transparent;
  width: 100%;
  cursor: zoom-in;
  overflow: hidden;
}

.gallery img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform var(--trans-slow);
}

.gallery .thumb:hover img {
  transform: scale(1.05);
}

.gallery figcaption {
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
}

figcaption {
  border-radius: var(--radius);
}

/* Carousel */
.carousel {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-elev);
  backdrop-filter: blur(var(--backdrop-blur)) saturate(140%);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  user-select: none;
  width: 100%;
  display: flex;
  flex-direction: column;
}

.carousel__viewport {
  overflow: hidden;
  width: 100%;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 500px;
}

.carousel__track {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform var(--trans-smooth);
  will-change: transform;
}

.carousel .slide {
  flex: 0 0 100%;
  min-width: 100%;
  margin: 0;
  padding: 0;
  position: relative;
  opacity: 0;
  transition: opacity var(--trans-smooth);
  display: flex;
  flex-direction: column;
}

.carousel .slide.is-active {
  opacity: 1;
}

.carousel .thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  border: 0;
  background: var(--bg-subtle);
  width: 100%;
  flex: 1 1 auto;
  min-height: 450px;
  cursor: zoom-in;
  position: relative;
  overflow: hidden;
  transition: background var(--trans);
}

.carousel .thumb:hover {
  background: var(--bg);
}

.carousel img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform var(--trans-smooth), box-shadow var(--trans-smooth);
  background: transparent;
}

.carousel .thumb:hover img {
  transform: scale(1.02);
  box-shadow: var(--shadow-xl);
}

.carousel figcaption {
  padding: 16px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
  text-align: center;
  letter-spacing: 0.01em;
  backdrop-filter: blur(var(--backdrop-blur-sm));
  transition: color var(--trans);
  height: 56px;
  min-height: 56px;
  max-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  flex-shrink: 0;
  flex-grow: 0;
  position: relative;
  overflow: hidden;
  line-height: 1.4;
}

.carousel .slide.is-active figcaption {
  color: var(--text);
}

.carousel__control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  backdrop-filter: blur(var(--backdrop-blur-sm));
  color: var(--text);
  box-shadow: var(--shadow);
  cursor: pointer;
  display: grid;
  place-items: center;
  z-index: 20;
  opacity: 0;
  font-size: 20px;
  font-weight: 300;
  transition: opacity var(--trans), transform var(--trans), background var(--trans);
  pointer-events: none;
}

.carousel:hover .carousel__control {
  opacity: 1;
  pointer-events: auto;
}

.carousel__control:hover {
  background: var(--accent);
  color: var(--bg);
  transform: translateY(-50%) scale(1.08);
  box-shadow: var(--shadow-lg);
}

.carousel__control:active {
  transform: translateY(-50%) scale(0.95);
}

.carousel__control.prev {
  left: var(--space-md);
}

.carousel__control.next {
  right: var(--space-md);
}

.carousel__dots {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 999px;
  backdrop-filter: blur(12px) saturate(180%);
  z-index: 15;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

html[data-theme="light"] .carousel__dots {
  background: rgba(255, 255, 255, 0.7);
}

.carousel__dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.5);
  padding: 0;
  cursor: pointer;
  transition: all var(--trans-smooth);
  position: relative;
}

.carousel__dots button::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: transparent;
  transition: background var(--trans);
}

.carousel__dots button:hover::before {
  background: rgba(255, 255, 255, 0.1);
}

html[data-theme="light"] .carousel__dots button {
  background: rgba(0, 0, 0, 0.3);
}

.carousel__dots button:hover {
  transform: scale(1.15);
}

.carousel__dots button[aria-current="true"] {
  background: #fff;
  transform: scale(1.3);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3);
}

html[data-theme="light"] .carousel__dots button[aria-current="true"] {
  background: #000;
  box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
  .carousel {
    min-height: 350px;
    border-radius: var(--radius);
  }

  .carousel__viewport {
    height: 350px;
    min-height: 350px;
    max-height: 350px;
  }

  .carousel .thumb {
    padding: var(--space-sm);
    min-height: 250px;
  }

  .carousel img {
    max-height: 50vh;
    border-radius: var(--radius-sm);
  }

  .carousel__control {
    width: 44px;
    height: 44px;
    opacity: 0.9;
    pointer-events: auto;
    font-size: 20px;
    font-weight: 400;
    box-shadow: var(--shadow-lg);
    border-width: 2px;
  }

  .carousel__control.prev {
    left: var(--space-xs);
  }

  .carousel__control.next {
    right: var(--space-xs);
  }

  .carousel__control:hover {
    transform: translateY(-50%) scale(1.1);
    opacity: 1;
  }

  .carousel__dots {
    bottom: 12px;
    padding: 10px 14px;
    gap: 10px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.15);
  }

  html[data-theme="light"] .carousel__dots {
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(0, 0, 0, 0.1);
  }

  .carousel__dots button {
    width: 9px;
    height: 9px;
  }

  .carousel__dots button[aria-current="true"] {
    transform: scale(1.4);
  }

  .carousel figcaption {
    padding: 14px 16px;
    font-size: 13px;
    height: 50px;
    min-height: 50px;
    max-height: 50px;
    letter-spacing: 0;
  }
}

@media (max-width: 480px) {
  .carousel {
    min-height: 300px;
    border-radius: var(--radius-sm);
  }

  .carousel__viewport {
    height: 300px;
    min-height: 300px;
    max-height: 300px;
  }

  .carousel .thumb {
    padding: var(--space-xs);
    min-height: 200px;
  }

  .carousel img {
    max-height: 45vh;
  }

  .carousel__control {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }

  .carousel__control.prev {
    left: 4px;
  }

  .carousel__control.next {
    right: 4px;
  }

  .carousel__dots {
    bottom: 8px;
    padding: 8px 12px;
    gap: 8px;
  }

  .carousel__dots button {
    width: 8px;
    height: 8px;
  }

  .carousel figcaption {
    padding: 12px 14px;
    font-size: 12px;
    height: 46px;
    min-height: 46px;
    max-height: 46px;
  }
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(140%) blur(16px);
  border-bottom: 1px solid var(--border);
  background: rgba(250, 250, 250, 0.88);
  transition: all var(--trans);
}

html[data-theme="dark"] .site-header {
  background: rgba(10, 10, 10, 0.88);
}

html[data-theme="amoled"] .site-header {
  background: rgba(0, 0, 0, 0.92);
}

/* Compact and elevate header when page is scrolled */
.site-header.is-scrolled {
  background: rgba(250, 250, 250, 0.94);
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--border);
}

html[data-theme="dark"] .site-header.is-scrolled {
  background: rgba(10, 10, 10, 0.94);
}

html[data-theme="amoled"] .site-header.is-scrolled {
  background: rgba(0, 0, 0, 0.96);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.site-header.is-scrolled .wrap {
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 17px;
}

.brand .logo {
  height: 24px;
  width: auto;
  display: block;
}

.brand .title {
  font-size: 17px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  z-index: 100;
  position: relative;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--trans-smooth);
  transform-origin: center;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

.nav {
  display: flex;
  gap: var(--space-sm);
}

.nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-subtle);
  box-shadow: var(--shadow-sm);
  transition: all var(--trans);
  text-decoration: none;
}

.nav a:hover {
  color: var(--text);
  background: var(--bg-elev);
  border-color: var(--border);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.nav a:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.nav a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.nav a.active {
  color: var(--text);
  background: var(--bg-elev);
  border-color: var(--border);
  box-shadow: var(--shadow);
}

.actions {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Buttons */
.btn-primary,
.btn-ghost,
.btn-secondary {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  padding: 12px 24px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 500;
  font-size: 15px;
  line-height: 1.4;
  box-shadow: var(--shadow);
  transition: all var(--trans);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--bg);
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

.btn-primary:active {
  transform: translateY(-1px) scale(0.98);
  box-shadow: var(--shadow);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
}

.btn-ghost:hover {
  background: var(--bg-elev);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-ghost:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background: var(--bg-subtle);
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  background: var(--bg-elev);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-subtle);
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--trans);
  text-decoration: none;
}

.btn-icon:hover {
  background: var(--bg-elev);
  border-color: var(--border);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.btn-icon:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-icon:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Icons */
.icon svg,
.i svg {
  display: block;
  width: 1em;
  height: 1em;
  fill: currentColor;
}

.logo-light {
  display: inline-block;
}

.logo-dark {
  display: none;
}

html[data-theme="dark"] .logo-light {
  display: none;
}

html[data-theme="dark"] .logo-dark {
  display: inline-block;
}

.hero-mark {
  display: flex;
  justify-content: center;
  margin-bottom: 10px;
  opacity: .9;
}

.hero-logo {
  height: 40px;
  width: auto;
  filter: saturate(0);
}

.theme-menu {
  position: absolute;
  right: 0;
  top: 44px;
  display: none;
  flex-direction: column;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.theme-menu.open {
  display: flex;
}

.theme-menu button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--text);
  padding: 10px 14px;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--trans);
}

.theme-menu button:hover {
  background: var(--bg-subtle);
}

/* Layout */
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.wrap.narrow {
  max-width: 900px;
}

.section {
  padding: var(--space-3xl) 0;
  position: relative;
  scroll-margin-top: 80px;
}

.section.alt {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  position: relative;
}

.section.alt::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.section:first-of-type {
  padding-top: 0;
}

.hero {
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 0, 0, 0.02) 0%, transparent 70%);
  pointer-events: none;
  animation: pulse 20s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
    opacity: 0.5;
  }

  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

.hero h1 {
  margin: 0 0 var(--space-lg);
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--text);
  animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.subtitle {
  margin: 0 0 var(--space-xl);
  color: var(--text-secondary);
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.7;
  max-width: 720px;
  animation: fadeInUp 0.8s ease-out 0.1s both;
}

.badges {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin: var(--space-lg) 0;
}

.badges img {
  height: 24px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: var(--space-xl);
  align-items: center;
  animation: fadeInUp 1s ease-out 0.2s both;
}

h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 var(--space-xl);
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text);
  line-height: 1.2;
}

h2 .i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--accent);
  opacity: 0.8;
  flex-shrink: 0;
}

h3 {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: var(--space-2xl) 0 var(--space-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  line-height: 1.3;
}

h3 .i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: var(--accent);
  opacity: 0.7;
  flex-shrink: 0;
}

/* Cards */
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-elev);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: all var(--trans-smooth);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, transparent, rgba(0, 0, 0, 0.05));
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--trans-smooth);
  pointer-events: none;
}

.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-2px);
  border-color: var(--border);
}

.card:hover::before {
  opacity: 1;
}

.glass {
  backdrop-filter: blur(var(--backdrop-blur)) saturate(140%);
  -webkit-backdrop-filter: blur(var(--backdrop-blur)) saturate(140%);
}

/* Table */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

/* Horizontal scroll wrapper for tables on small screens */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table thead th {
  text-align: left;
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 14px 18px;
  border-bottom: 2px solid var(--border);
}

.table tbody td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  line-height: 1.5;
}

.table tbody tr {
  transition: all var(--trans);
}

.table tbody tr:hover {
  background: var(--bg-subtle);
  transform: translateX(4px);
}

.table tbody td strong {
  color: var(--text);
  font-weight: 600;
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* Subtle zebra striping for readability */
.table tbody tr:nth-child(even) {
  background: color-mix(in oklab, var(--bg-subtle) 60%, transparent);
}

/* Lists */
.list {
  margin: var(--space-lg) 0 0;
  padding-left: 24px;
  color: var(--text);
  list-style: none;
  position: relative;
}

.list li {
  margin: var(--space-md) 0;
  color: var(--text-secondary);
  line-height: 1.7;
  padding-left: 8px;
  position: relative;
  transition: color var(--trans);
}

.list li::before {
  content: '•';
  position: absolute;
  left: -20px;
  color: var(--accent);
  font-weight: bold;
  font-size: 1.2em;
  opacity: 0.6;
}

.list li:hover {
  color: var(--text);
}

.list-ol {
  margin: var(--space-lg) 0 0;
  padding-left: 28px;
  counter-reset: item;
}

.list-ol li {
  margin: var(--space-md) 0;
  line-height: 1.7;
  color: var(--text-secondary);
  position: relative;
  padding-left: 8px;
  transition: color var(--trans);
}

.list-ol li::marker {
  color: var(--accent);
  font-weight: 600;
  opacity: 0.7;
}

.list-ol li:hover {
  color: var(--text);
}

/* Code */
.code {
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  font-family: 'SF Mono', Monaco, Menlo, Consolas, 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.7;
  overflow-x: auto;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  transition: all var(--trans);
  position: relative;
}

.code:hover {
  box-shadow: var(--shadow);
  border-color: var(--border);
}

.code code {
  display: block;
  white-space: pre;
  font-family: inherit;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-2xl) 0;
  margin-top: var(--space-3xl);
  background: var(--bg-subtle);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.site-footer p {
  color: var(--text-secondary);
  font-size: 15px;
  margin: 0;
  line-height: 1.6;
}

.site-footer a {
  color: var(--accent);
  font-weight: 500;
  transition: all var(--trans);
}

.site-footer a:hover {
  color: var(--accent-hover);
  text-decoration: none;
}

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  backdrop-filter: blur(var(--backdrop-blur-sm)) saturate(140%);
  color: var(--text);
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 40;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--trans-smooth);
}

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

.back-to-top:hover {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.back-to-top:active {
  transform: translateY(-2px);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
}

/* Responsive */
@media (max-width: 1100px) {
  .gallery {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: none;
  }



  .nav {
    display: none;
  }



  .back-to-top {
    bottom: var(--space-md);
    right: var(--space-md);
    width: 44px;
    height: 44px;
  }
}

.hero {
  padding: 64px 0 48px;
}

.hero h1 {
  margin-bottom: var(--space-md);
}

.subtitle {
  margin-bottom: var(--space-lg);
}

.section {
  padding: var(--space-2xl) 0;
}

.gallery {
  grid-template-columns: repeat(2, 1fr);
}


@media (max-width: 640px) {
  .wrap {
    padding: 0 var(--space-md);
  }

  .site-header .wrap {
    padding: var(--space-sm) var(--space-md);
  }

  .brand .title {
    display: none;
  }

  .btn-primary,
  .btn-ghost,
  .btn-secondary {
    padding: 11px 20px;
    font-size: 14px;
  }

  .hero {
    padding: 48px 0 32px;
  }

  .cta {
    gap: 12px;
  }

  h2 {
    margin-bottom: var(--space-lg);
  }

  h3 {
    margin: var(--space-xl) 0 var(--space-md);
  }
}

@media (max-width: 520px) {
  .gallery {
    grid-template-columns: 1fr;
  }
}