/* ═══════════════════════════════════════════════════════
   Nexus Website — Obsidian Theme
   ═══════════════════════════════════════════════════════ */

:root {
  /* Obsidian palette */
  --background: #0A0A0F;
  --surface: #111118;
  --surface-raised: #1A1A24;
  --border: #2A2A36;
  --primary: #7600da;
  --primary-hover: #8a1ff0;
  --foreground: #F2F2F2;
  --muted-foreground: #8B8B9E;
  --disabled-foreground: #52525E;

  /* Semantic */
  --success: #4ADE80;
  --info: #9D6BF5;

  /* Spacing (8px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;

  /* Fonts */
  --font-sans: "Geist Sans Variable", "Geist Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "Geist Mono Variable", "Geist Mono", "Cascadia Code", "Consolas", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ── Typography ─────────────────────────────────────── */

.type-display {
  font-size: clamp(36px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.type-headline {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.type-title1 {
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.type-title2 {
  font-size: clamp(17px, 1.5vw, 20px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.type-body {
  font-size: clamp(14px, 1vw, 15px);
  font-weight: 400;
  line-height: 1.5;
}

.type-callout {
  font-size: clamp(14px, 1vw, 15px);
  font-weight: 500;
  line-height: 1.45;
}

.type-footnote {
  font-size: clamp(12px, 0.9vw, 13px);
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0.005em;
}

.type-caption {
  font-size: clamp(11px, 0.8vw, 12px);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.text-muted-foreground {
  color: var(--muted-foreground) !important;
}

.text-primary-accent {
  color: var(--primary) !important;
}

/* ── Navbar ─────────────────────────────────────────── */

.navbar-nexus {
  background: hsla(240, 20%, 5%, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: var(--space-3) 0;
  z-index: 50;
}

.navbar-nexus .navbar-brand {
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--foreground);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.navbar-nexus .navbar-brand .brand-icon {
  width: 28px;
  height: 28px;
  background: var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.navbar-nexus .nav-link {
  color: var(--muted-foreground);
  font-weight: 500;
  font-size: 14px;
  transition: color 200ms ease-out;
  padding: var(--space-2) var(--space-4) !important;
}

.navbar-nexus .nav-link:hover,
.navbar-nexus .nav-link:focus-visible {
  color: var(--foreground);
}

/* ── Buttons ────────────────────────────────────────── */

.btn-nexus {
  background: var(--primary);
  color: #fff;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15px;
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-lg);
  transition: background 200ms ease-out, transform 100ms ease-out;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.btn-nexus:hover {
  background: var(--primary-hover);
  color: #fff;
  transform: translateY(-1px);
}

.btn-nexus:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn-nexus:active {
  transform: translateY(0);
}

.btn-nexus-lg {
  font-size: 17px;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-xl);
}

.btn-nexus-sm {
  font-size: 13px;
  padding: 6px var(--space-4);
}

.btn-ghost {
  background: transparent;
  color: var(--muted-foreground);
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 15px;
  padding: var(--space-3) var(--space-6);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: color 200ms ease-out, border-color 200ms ease-out;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.btn-ghost:hover {
  color: var(--foreground);
  border-color: var(--muted-foreground);
}

.btn-ghost:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ── Hero ───────────────────────────────────────────── */

.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse 80% 60% at 50% 30%, hsla(272, 100%, 43%, 0.15), transparent 70%),
    linear-gradient(180deg, hsla(240, 20%, 4%, 0.4) 0%, hsla(240, 20%, 4%, 0.55) 40%, var(--background) 100%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 40%;
  z-index: 2;
  background: linear-gradient(180deg, transparent 0%, var(--background) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: calc(var(--space-24) + 48px) 0 var(--space-16);
}

.hero-tagline {
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.hero-title {
  max-width: 720px;
}

.hero-subtitle {
  max-width: 560px;
  margin-top: var(--space-6);
}

.hero-actions {
  margin-top: var(--space-10);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

.hero-meta {
  margin-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ── Hero Screenshot ────────────────────────────────── */

.hero-screenshot {
  position: relative;
  margin-top: var(--space-16);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 32px 64px hsla(0, 0%, 0%, 0.5);
}

.hero-screenshot img {
  width: 100%;
  height: auto;
  display: block;
}

/* ── Section shared ─────────────────────────────────── */

.section-block {
  padding: var(--space-24) 0;
}

.section-block--surface {
  background: var(--surface);
}

.section-label {
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.section-title {
  max-width: 600px;
}

.section-subtitle {
  max-width: 520px;
  margin-top: var(--space-4);
}

/* ── Feature cards ──────────────────────────────────── */

.feature-grid {
  margin-top: var(--space-12);
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  height: 100%;
  transition: border-color 200ms ease-out, transform 200ms ease-out;
}

.feature-card:hover {
  border-color: hsla(272, 100%, 43%, 0.3);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: hsla(272, 100%, 43%, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
}

.feature-icon i {
  color: var(--primary);
}

.feature-card h3 {
  margin-bottom: var(--space-3);
}

/* ── Screenshot gallery ─────────────────────────────── */

.screenshot-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: border-color 200ms ease-out, transform 200ms ease-out;
}

.screenshot-card:hover {
  border-color: hsla(272, 100%, 43%, 0.3);
  transform: translateY(-2px);
}

.screenshot-card img,
.screenshot-card video {
  width: 100%;
  height: auto;
  display: block;
}

.screenshot-card .placeholder-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-3);
}

.screenshot-card .placeholder-img i {
  color: var(--disabled-foreground);
}


.screenshot-label {
  background: var(--surface);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border);
}

/* ── Source logos ────────────────────────────────────── */

.source-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-10);
  padding: var(--space-12) 0;
}

.source-strip-label {
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.source-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  opacity: 0.45;
  transition: opacity 300ms ease-out;
}

.source-logo:hover {
  opacity: 0.85;
}

.source-logo .logo-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
}

.source-logo .logo-box i {
  color: var(--muted-foreground);
}

/* ── CTA section ────────────────────────────────────── */

.cta-section {
  position: relative;
  padding: var(--space-24) 0;
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 50% at 50% 50%, hsla(272, 100%, 43%, 0.08), transparent 70%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-16) var(--space-8);
  max-width: 640px;
  margin: 0 auto;
}

.cta-description {
  max-width: 440px;
}

.version-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  background: hsla(272, 100%, 43%, 0.12);
  border: 1px solid hsla(272, 100%, 43%, 0.25);
  border-radius: 9999px;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
}

/* ── Footer ─────────────────────────────────────────── */

.footer-nexus {
  border-top: 1px solid var(--border);
  padding: var(--space-10) 0;
}

.footer-nexus a {
  color: var(--muted-foreground);
  text-decoration: none;
  transition: color 200ms ease-out;
}

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

/* ── Icon sizing utilities ──────────────────────────── */

.icon-xs  { width: 12px; height: 12px; }
.icon-sm  { width: 14px; height: 14px; }
.icon-md  { width: 16px; height: 16px; }
.icon-base { width: 20px; height: 20px; }
.icon-lg  { width: 24px; height: 24px; }
.icon-xl  { width: 32px; height: 32px; }
.icon-2xl { width: 48px; height: 48px; }

.icon-brand {
  width: 16px;
  height: 16px;
  color: #fff;
}

.icon-success {
  color: var(--success);
}

.icon-footer {
  vertical-align: -3px;
}

/* ── Changelog page ─────────────────────────────────── */

.changelog-header {
  position: relative;
  padding-top: calc(var(--space-24) + 48px);
  padding-bottom: var(--space-12);
}

.changelog-header-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 50vh;
  z-index: 0;
}

.changelog-header .container {
  position: relative;
  z-index: 3;
}

.changelog-header-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.changelog-header-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: radial-gradient(ellipse 80% 60% at 50% 20%, hsla(272, 100%, 43%, 0.1), transparent 70%);
}

.changelog-header-bg::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 60%;
  z-index: 2;
  background: linear-gradient(180deg, transparent 0%, var(--background) 100%);
}

.changelog-header-subtitle {
  max-width: 480px;
  margin-top: var(--space-3);
}

.changelog-main {
  padding-bottom: var(--space-24);
}

.changelog-timeline {
  max-width: 720px;
  position: relative;
  padding-left: var(--space-8);
  border-left: 2px solid var(--border);
}

.changelog-entry {
  position: relative;
  padding-bottom: var(--space-12);
}

.changelog-entry::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-8) - 5px);
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 9999px;
  background: var(--border);
}

.changelog-entry--latest::before {
  background: var(--primary);
  box-shadow: 0 0 0 4px hsla(272, 100%, 43%, 0.2);
}

.changelog-entry-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.changelog-entry-body {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.changelog-category {
  margin-top: var(--space-6);
}

.changelog-category:first-of-type {
  margin-top: var(--space-4);
}

.changelog-category-title {
  margin-bottom: var(--space-3);
}

.changelog-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
}

.changelog-badge--added {
  color: var(--success);
  background: hsla(142, 71%, 45%, 0.12);
}

.changelog-badge--changed {
  color: #FACC15;
  background: hsla(48, 96%, 53%, 0.12);
}

.changelog-badge--fixed {
  color: #60A5FA;
  background: hsla(217, 91%, 60%, 0.12);
}

.changelog-badge--removed {
  color: #F87171;
  background: hsla(0, 84%, 60%, 0.12);
}

.changelog-badge--deprecated {
  color: var(--muted-foreground);
  background: hsla(240, 5%, 46%, 0.12);
}

.changelog-list {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
}

.changelog-list li {
  position: relative;
  padding-left: var(--space-4);
  padding-top: var(--space-1);
  padding-bottom: var(--space-1);
  font-size: clamp(14px, 1vw, 15px);
  color: var(--muted-foreground);
  line-height: 1.5;
}

.changelog-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 4px;
  height: 4px;
  border-radius: 9999px;
  background: var(--disabled-foreground);
}

.changelog-list li strong {
  color: var(--foreground);
}

.changelog-sublist {
  list-style: none;
  padding-left: var(--space-4);
  margin-top: var(--space-1);
  margin-bottom: var(--space-1);
}

.changelog-sublist li {
  padding-left: var(--space-4);
  font-size: clamp(13px, 0.9vw, 14px);
}

.changelog-sublist li::before {
  width: 3px;
  height: 3px;
  top: 10px;
  background: var(--border);
}

.changelog-download {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

/* ── Utilities ──────────────────────────────────────── */

.glass-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

/* ── Focus visible ──────────────────────────────────── */

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ── Reduced motion ─────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0ms !important;
    transition-duration: 0ms !important;
  }
}