/* ==========================================================================
   re:mind Competition Website — Stylesheet
   Design system: dark-mode-first, futuristic, bold
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  --color-bg: #0a0a0f;
  --color-surface: #1a1a2e;
  --color-accent: #00d4ff;
  --color-accent-secondary: #8b5cf6;
  --color-text-primary: #ffffff;
  --color-text-secondary: #888888;
  --color-success: #10b981;
  --color-error: #ef4444;
  --color-border: #2a2a3e;

  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: "SF Mono", SFMono-Regular, Consolas, "Liberation Mono", Menlo,
    monospace;

  --container-max: 1200px;
  --container-narrow: 800px;
  --radius: 12px;
  --radius-sm: 6px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #33dfff;
}

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

/* --------------------------------------------------------------------------
   Container
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background-color: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.nav__logo span {
  color: var(--color-accent);
}

.nav__links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav__links a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--color-text-primary);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  text-align: center;
  padding: 96px 24px 64px;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  color: var(--color-accent);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
  text-shadow: 0 0 40px rgba(0, 212, 255, 0.2);
}

.hero__tagline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-secondary);
  font-style: italic;
  margin-bottom: 12px;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Section (generic vertical spacing)
   -------------------------------------------------------------------------- */
.section {
  padding: 64px 0;
}

.section__title {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  letter-spacing: -0.02em;
}

/* --------------------------------------------------------------------------
   Screenshots Gallery
   -------------------------------------------------------------------------- */
.screenshots {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding: 8px 24px 24px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  width: 100%;
  margin-left: -24px;
  margin-right: -24px;
  -ms-overflow-style: none;
  scrollbar-width: thin;
}

.screenshots::-webkit-scrollbar {
  height: 6px;
}

.screenshots::-webkit-scrollbar-track {
  background: var(--color-surface);
  border-radius: 3px;
}

.screenshots::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

.screenshots__item {
  flex: 0 0 auto;
  scroll-snap-align: center;
  min-width: 200px;
}

.phone-frame {
  width: 260px;
  border: 3px solid var(--color-border);
  border-radius: 32px;
  padding: 8px;
  background-color: var(--color-surface);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.phone-frame:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
}

.phone-frame img {
  border-radius: 24px;
  width: 100%;
  height: auto;
  display: block;
}

/* --------------------------------------------------------------------------
   Document Link Cards (Landing Page)
   -------------------------------------------------------------------------- */
.doc-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.doc-card {
  display: block;
  padding: 32px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition),
    transform var(--transition);
  cursor: pointer;
}

.doc-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.12), 0 4px 16px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}

.doc-card__icon {
  font-size: 2rem;
  margin-bottom: 12px;
  display: block;
}

.doc-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.doc-card__description {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Document Pages — Header
   -------------------------------------------------------------------------- */
.doc-header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 40px;
}

.doc-header__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.doc-header__meta {
  margin-top: 8px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Document Pages — Prose Content
   -------------------------------------------------------------------------- */
.doc-content {
  padding-bottom: 64px;
}

.doc-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 48px;
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 3px solid var(--color-accent);
  letter-spacing: -0.01em;
}

.doc-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  padding-left: 16px;
  border-left: 3px solid var(--color-accent-secondary);
}

.doc-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--color-text-secondary);
}

.doc-content p {
  margin-bottom: 16px;
  line-height: 1.75;
  color: var(--color-text-primary);
}

.doc-content ul,
.doc-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.doc-content li {
  margin-bottom: 8px;
  line-height: 1.65;
}

.doc-content li::marker {
  color: var(--color-accent);
}

.doc-content strong {
  font-weight: 600;
  color: var(--color-text-primary);
}

.doc-content em {
  color: var(--color-text-secondary);
}

.doc-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  color: var(--color-accent);
}

.doc-content pre {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
}

.doc-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-text-primary);
}

.doc-content blockquote {
  border-left: 3px solid var(--color-accent-secondary);
  margin: 24px 0;
  padding: 12px 20px;
  background-color: rgba(139, 92, 246, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text-secondary);
}

.doc-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 40px 0;
}

/* Tables */
.doc-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 0.9rem;
}

.doc-content thead {
  border-bottom: 2px solid var(--color-border);
}

.doc-content th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.doc-content td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
}

.doc-content tbody tr:hover {
  background-color: rgba(26, 26, 46, 0.5);
}

/* --------------------------------------------------------------------------
   Mermaid Diagrams
   -------------------------------------------------------------------------- */
.mermaid-container {
  text-align: center;
  margin: 24px -24px;
  overflow-x: auto;
  background-color: rgba(26, 26, 46, 0.3);
  border-radius: var(--radius);
  padding: 40px 24px;
}

.mermaid-container .mermaid {
  display: inline-block;
  min-width: 600px;
}

.mermaid-container .mermaid svg {
  max-width: none !important;
  width: auto !important;
  min-width: 600px;
}

.container--narrow .mermaid-container {
  margin-left: -24px;
  margin-right: -24px;
  border-radius: 0;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  padding: 32px 24px;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
  margin-top: 64px;
}

.footer a {
  color: var(--color-text-secondary);
}

.footer a:hover {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.accent {
  color: var(--color-accent);
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
}

.badge--pro {
  background-color: rgba(0, 212, 255, 0.1);
  border-color: rgba(0, 212, 255, 0.3);
  color: var(--color-accent);
}

.text-center {
  text-align: center;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* --------------------------------------------------------------------------
   Features Grid (Landing Page)
   -------------------------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  padding: 28px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.feature-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.08);
}

.feature-card__icon {
  font-size: 1.75rem;
  display: block;
  margin-bottom: 12px;
}

.feature-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.feature-card__description {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .nav {
    padding: 12px 16px;
  }

  .nav__links {
    gap: 16px;
  }

  .nav__links a {
    font-size: 0.8rem;
  }

  .hero {
    padding: 64px 16px 48px;
  }

  .section {
    padding: 40px 0;
  }

  .doc-links {
    grid-template-columns: 1fr;
  }

  .phone-frame {
    width: 220px;
  }

  .doc-content h2 {
    font-size: 1.3rem;
  }

  .doc-content h3 {
    font-size: 1.1rem;
  }

  .doc-content pre {
    padding: 16px;
    font-size: 0.8rem;
  }

  .doc-content table {
    font-size: 0.8rem;
  }

  .doc-content th,
  .doc-content td {
    padding: 8px 10px;
  }

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

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero__title {
    font-size: 2rem;
  }

  .doc-card {
    padding: 24px;
  }

  .phone-frame {
    width: 190px;
  }

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