/* ==========================================================================
   vDeskX — Minimal Fluent 2 Stylesheet
   ========================================================================== */

:root {
  --font-sans: "Segoe UI Variable Text", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  --font-display: "Segoe UI Variable Display", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "Cascadia Code", "Consolas", "Courier New", monospace;

  --bg-app: #121418;
  --bg-subtle: #181b21;
  --bg-card: #1d2129;
  --bg-card-hover: #242933;
  --bg-input: #171a20;

  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-tertiary: #6b7280;
  --text-accent: #3898ec;

  --accent-primary: #0078d4;
  --accent-hover: #1084d9;
  --accent-subtle: rgba(0, 120, 212, 0.14);

  --border-subtle: #232832;
  --border-card: #2b323e;
  --border-hover: #3b82f6;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.28);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
}

[data-theme="light"] {
  --bg-app: #f6f7f9;
  --bg-subtle: #eef0f4;
  --bg-card: #ffffff;
  --bg-card-hover: #f9fafb;
  --bg-input: #ffffff;

  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-tertiary: #6b7280;
  --text-accent: #0067b8;

  --accent-primary: #0067b8;
  --accent-hover: #005a9e;
  --accent-subtle: rgba(0, 103, 184, 0.09);

  --border-subtle: #e5e7eb;
  --border-card: #d6dae1;
  --border-hover: #0067b8;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.12);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.6;
}

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

ul {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-primary);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg-app) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 1.05rem;
}

.brand-icon {
  width: 26px;
  height: 26px;
}

.version-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-accent);
  background: var(--accent-subtle);
  padding: 0.12rem 0.5rem;
  border-radius: var(--radius-full);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-card);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-tertiary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.58rem 1.05rem;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 140ms ease, border-color 140ms ease;
}

.btn-large {
  padding: 0.75rem 1.35rem;
  font-size: 0.98rem;
}

.btn-primary {
  background: var(--accent-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

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

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

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

/* Hero */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 0.28rem 0.8rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(1.95rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
  max-width: 720px;
  margin: 0 auto 1rem;
}

.hero-lead {
  color: var(--text-secondary);
  font-size: 1.06rem;
  max-width: 660px;
  margin: 0 auto 1.85rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.hero-meta {
  font-size: 0.83rem;
  color: var(--text-tertiary);
}

.hero-meta a {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.hero-meta a:hover {
  color: var(--text-primary);
}

.hero-note {
  margin-top: 0.45rem;
  font-size: 0.79rem;
  color: var(--text-tertiary);
}

.hero-note strong {
  color: var(--text-secondary);
  font-weight: 500;
}

.hero-preview {
  margin-top: 2.5rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-lg);
  background: var(--bg-card);
}

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

/* Sections */
.section {
  padding: 3rem 0;
  border-top: 1px solid var(--border-subtle);
}

.section-title {
  font-size: 1.45rem;
  margin-bottom: 0.4rem;
}

.section-sub {
  color: var(--text-secondary);
  font-size: 0.96rem;
  margin-bottom: 1.6rem;
}

/* Grid Cards */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.15rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

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

.link-card {
  display: block;
  transition: border-color 140ms ease, background-color 140ms ease;
}

.link-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.link-card .card-arrow {
  color: var(--text-accent);
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-block;
  margin-top: 0.65rem;
}

/* Editions / Pro */
.tier-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.tier-card.pro {
  border-color: color-mix(in srgb, var(--accent-primary) 55%, var(--border-card));
}

.tier-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.55rem;
}

.tier-price-block {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
}

.tier-price {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  line-height: 1.25;
  color: var(--text-accent);
}

.tier-currency-hint {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  line-height: 1.35;
  margin-top: 0.12rem;
}

.tier-period {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.tier-list {
  margin: 1rem 0 1.35rem;
  display: grid;
  gap: 0.45rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.tier-list li::before {
  content: "✓ ";
  color: var(--text-accent);
  font-weight: 700;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 2rem 0;
  margin-top: 2rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.86rem;
  color: var(--text-tertiary);
}

.footer-bottom a:hover {
  color: var(--text-primary);
}

@media (max-width: 760px) {
  .nav-links {
    display: none;
  }
  .grid-3, .grid-2 {
    grid-template-columns: 1fr;
  }
  .hero {
    padding: 2.75rem 0 2rem;
  }
}