@import "tailwindcss";

/* ── Base ──────────────────────────────────────────────────────────────── */
/*
 * DO NOT add `margin: 0` or `padding: 0` to the universal selector here.
 * Tailwind v4 preflight already normalizes these correctly. A legacy reset
 * like `* { margin: 0; padding: 0 }` silently kills Tailwind's `mx-auto`
 * (margin-inline: auto) because when the shorthand `margin` comes later in
 * source order it expands to physical `margin-left: 0` which wins the
 * cascade — leading to every `<div class="mx-auto max-w-6xl">` container
 * being left-flushed instead of centered. This was Bug #28 (2026-04-11):
 * every page on every startup had broken centering because of this one line.
 * If you need to reset box-sizing only, use `box-sizing: border-box`
 * WITHOUT the margin/padding resets.
 */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--color-primary);
  color: #fff;
}

/* ── Navigation ────────────────────────────────────────────────────────── */

.nav-blur {
  background: color-mix(in srgb, var(--color-bg) 80%, transparent);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
}

.nav-link {
  position: relative;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-text);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: width 0.2s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.mobile-nav-link {
  display: block;
  padding: 0.625rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all 0.15s ease;
}

.mobile-nav-link:hover {
  color: var(--color-text);
  background: var(--color-bg-tertiary);
}

.hamburger-line {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: all 0.3s ease;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border-radius: 9999px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(0, 0, 0, 0.04);
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.04);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-1px);
}

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

.hero-gradient-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.12), transparent),
    var(--color-bg);
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 4rem 4rem;
  opacity: 0.4;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, black 40%, transparent 100%);
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--color-text);
}

.hero-gradient-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-badge {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.hero-glow {
  position: absolute;
  bottom: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 60%;
  background: radial-gradient(ellipse at center, hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.08), transparent 70%);
  pointer-events: none;
}

/* ── Feature Cards ─────────────────────────────────────────────────────── */

.feature-card {
  position: relative;
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: all 0.25s ease;
}

.feature-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
  transform: translateY(-2px);
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  font-size: 1.5rem;
  border-radius: 0.75rem;
  background: var(--color-primary-50);
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.feature-description {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
}

/* ── Article Cards ─────────────────────────────────────────────────────── */

.article-card {
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: all 0.25s ease;
  text-decoration: none;
}

.article-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
  transform: translateY(-2px);
}

.article-card-accent {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  opacity: 0;
  transition: opacity 0.25s ease;
}

.article-card:hover .article-card-accent {
  opacity: 1;
}

.article-tag {
  display: inline-block;
  padding: 0.125rem 0.625rem;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 9999px;
  background: var(--color-primary-50);
  color: var(--color-primary);
}

/* ── CTA Section ───────────────────────────────────────────────────────── */

.cta-gradient-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-primary-900), var(--color-primary), var(--color-primary-dark));
}

/* ── Blog Article ──────────────────────────────────────────────────────── */

.blog-article-header {
  padding: 4rem 0 0;
  background: var(--color-bg);
}

.blog-article {
  background: var(--color-bg);
}

/* ── Prose (Article Content) ───────────────────────────────────────────── */

.prose-custom {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text);
}

.prose-custom h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.prose-custom h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.prose-custom p {
  margin-bottom: 1.25rem;
}

.prose-custom a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity 0.15s ease;
}

.prose-custom a:hover {
  opacity: 0.8;
}

.prose-custom ul,
.prose-custom ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.prose-custom li {
  margin-bottom: 0.375rem;
}

.prose-custom blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  border-left: 3px solid var(--color-primary);
  background: var(--color-bg-secondary);
  border-radius: 0 0.5rem 0.5rem 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.prose-custom code {
  font-size: 0.875em;
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  background: var(--color-bg-tertiary);
  color: var(--color-primary);
}

.prose-custom pre {
  margin: 1.5rem 0;
  padding: 1.25rem;
  border-radius: 0.75rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  overflow-x: auto;
}

.prose-custom pre code {
  padding: 0;
  background: none;
  color: inherit;
}

.prose-custom img {
  border-radius: 0.75rem;
  margin: 2rem 0;
}

.prose-custom table {
  width: 100%;
  margin: 1.5rem 0;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.prose-custom th,
.prose-custom td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.prose-custom th {
  font-weight: 600;
  background: var(--color-bg-secondary);
}

/* ── Share Bar ─────────────────────────────────────────────────────────── */

.share-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-radius: 0.75rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: all 0.15s ease;
  text-decoration: none;
}

.share-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

/* ── Legal Pages ───────────────────────────────────────────────────────── */

.legal-page {
  max-width: 48rem;
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}

.legal-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.legal-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--color-text);
}

.legal-subtitle {
  margin-top: 0.5rem;
  font-size: 1rem;
  color: var(--color-text-tertiary);
}

.legal-content section {
  margin-bottom: 2.5rem;
}

.legal-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.legal-content p {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
}

.legal-content ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.legal-content li {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

.legal-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.footer-link {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color 0.15s ease;
  text-decoration: none;
}

.footer-link:hover {
  color: var(--color-text);
}

/* ── Utility: line-clamp ───────────────────────────────────────────────── */

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Calculator / Comparison Archetype ─────────────────────────────────── */

.calc-widget {
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.calc-input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  outline: none;
}

.calc-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.15);
}

.calc-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
  color: var(--color-text);
}

.calc-unit {
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  min-width: 3rem;
  text-align: center;
}

.calc-result {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: 0.75rem;
  background: var(--color-primary-50);
  border: 1px solid hsla(var(--color-primary-h), var(--color-primary-s), var(--color-primary-l), 0.2);
}

.calc-result-label {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
}

.calc-result-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin-top: 0.25rem;
}

.calc-result-detail {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

/* ── Comparison Table ──────────────────────────────────────────────────── */

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.comparison-table thead {
  position: sticky;
  top: var(--nav-height);
  z-index: 10;
}

.comparison-table th {
  padding: 0.875rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  user-select: none;
  transition: color 0.15s ease;
}

.comparison-table th:hover {
  color: var(--color-text);
}

.comparison-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.comparison-table tbody tr {
  transition: background 0.15s ease;
}

.comparison-table tbody tr:hover {
  background: var(--color-bg-secondary);
}

.comparison-badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 600;
  border-radius: 9999px;
  background: var(--color-primary);
  color: #fff;
}

.comparison-stars {
  color: #f59e0b;
  letter-spacing: 0.05em;
}

.comparison-feature-tag {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 500;
  border-radius: 9999px;
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
}

.comparison-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border-radius: 9999px;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

.comparison-cta-btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

/* Comparison mobile card */
.comparison-mobile-card {
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: border-color 0.15s ease;
}

.comparison-mobile-card.is-top {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

/* ── Animations ────────────────────────────────────────────────────────── */

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .feature-card,
  .article-card {
    animation: fade-in-up 0.5s ease both;
  }

  .feature-card:nth-child(1), .article-card:nth-child(1) { animation-delay: 0.05s; }
  .feature-card:nth-child(2), .article-card:nth-child(2) { animation-delay: 0.1s; }
  .feature-card:nth-child(3), .article-card:nth-child(3) { animation-delay: 0.15s; }
  .feature-card:nth-child(4), .article-card:nth-child(4) { animation-delay: 0.2s; }
  .feature-card:nth-child(5), .article-card:nth-child(5) { animation-delay: 0.25s; }
  .feature-card:nth-child(6), .article-card:nth-child(6) { animation-delay: 0.3s; }
}