/* style.css */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Design tokens: dark (default) ───────────────────────────── */
:root {
  --bg:           #0a0a0f;
  --bg-alt:       #0d0d14;
  --card:         #13131a;
  --card-hover:   #161620;
  --border:       #1e1e2a;
  --border-hover: #2e2e42;
  --text:         #e8e8f0;
  --text-muted:   #7878a0;
  --text-dim:     #4a4a6a;
  --accent:       #4f8ef7;
  --accent-dim:   #2a5ab0;
  --partner:      #e8a03c;
  --partner-dim:  #7a520f;
  --green:        #22c55e;
  --yellow:       #f59e0b;
  --red:          #ef4444;
  --red-dim:      #991b1b;
  --grey:         #52525b;
  --footer-bg:    #070709;
  --nav-height:   64px;
  --radius:       12px;
  --radius-sm:    8px;
  --transition:   0.22s ease;
}

/* ── Design tokens: light ─────────────────────────────────────── */
[data-theme="light"] {
  --bg:           #f5f5f8;
  --bg-alt:       #ebebf0;
  --card:         #ffffff;
  --card-hover:   #f9f9fc;
  --border:       #dcdce8;
  --border-hover: #b8b8d0;
  --text:         #111118;
  --text-muted:   #55556a;
  --text-dim:     #9999b8;
  --accent:       #2e6ee6;
  --accent-dim:   #b8d0f8;
  --partner:      #b96a00;
  --partner-dim:  #f5d8a8;
  --footer-bg:    #e2e2ea;
  --red-dim:      #b91c1c;
}

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Nav ──────────────────────────────────────────────────────── */

.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: rgba(10, 10, 15, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: border-color var(--transition), background-color 0.3s ease;
}

[data-theme="light"] .nav-header {
  background-color: rgba(245, 245, 248, 0.88);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
  transition: color var(--transition);
}

.nav-logo:hover {
  color: var(--accent);
}

.nav-links {
  display: none;
  align-items: center;
  gap: 8px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background-color var(--transition);
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ── Hamburger ────────────────────────────────────────────────── */

.nav-hamburger {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  transition: border-color var(--transition), background-color var(--transition);
}

.nav-hamburger:hover {
  border-color: var(--border-hover);
  background-color: var(--card);
}

.nav-hamburger svg {
  width: 18px;
  height: 18px;
}

.icon-close { display: none; }
.nav-hamburger.open .icon-hamburger { display: none; }
.nav-hamburger.open .icon-close     { display: block; }

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 98;
}

.nav-overlay.active { display: block; }

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

.hero {
  position: relative;
  background-color: var(--bg);
  padding: calc(var(--nav-height) + 60px) 0 100px; /* Extra padding bottom for divider overlap */
  overflow: hidden;
  transition: background-color 0.3s ease;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 4rem);
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 4px;
}

.hero-description {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 540px;
  line-height: 1.75;
  margin: 20px auto 0;
}

/* ── Section dividers ─────────────────────────────────────────── */

.section-divider {
  display: block;
  line-height: 0;
  position: relative;
  z-index: 2;
  margin-top: -80px; /* Pull divider up into previous section */
  height: 80px;
  pointer-events: none; /* Allow clicks to pass through transparent parts */
}

.section-divider svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* SVG fills - these will now transition smoothly */
.divider-fill-bg      { fill: var(--bg); transition: fill 0.3s ease; }
.divider-fill-alt     { fill: var(--bg-alt); transition: fill 0.3s ease; }
.divider-fill-footer  { fill: var(--footer-bg); transition: fill 0.3s ease; }

/* ── Theme-switch broadcast ─────────────────────────────────────── */
html.is-switching-theme *,
html.is-switching-theme *::before,
html.is-switching-theme *::after {
  transition:
    background-color 0.3s ease,
    color            0.3s ease,
    border-color     0.3s ease,
    fill             0.3s ease,
    stroke           0.3s ease,
    box-shadow       0.3s ease !important;
}

/* ── Sections ─────────────────────────────────────────────────── */

.services-section {
  background-color: var(--bg-alt);
  padding: 100px 0 60px; /* Top padding accounts for divider overlap space */
  position: relative;
  z-index: 1;
  transition: background-color 0.3s ease;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin-top: 8px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

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

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding-bottom: 20px;
}

.card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  transition: transform var(--transition), border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  background-color: var(--card-hover);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .card:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.card-partner { border-color: var(--partner-dim); }
.card-partner:hover { border-color: var(--partner); }

.card-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--partner);
  background-color: rgba(232, 160, 60, 0.1);
  border: 1px solid var(--partner-dim);
  border-radius: 999px;
  padding: 2px 9px;
  margin-bottom: 16px;
}

[data-theme="light"] .card-badge {
  background-color: rgba(185, 106, 0, 0.08);
}

.card-badge-service {
  color: var(--accent);
  background-color: rgba(79, 142, 247, 0.08);
  border-color: var(--accent-dim);
}

.card-top { margin-bottom: 20px; }

.card-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.card-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.card-sublink {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8438rem;
  color: var(--text-muted);
  padding: 6px 0;
  transition: color var(--transition);
}

.card-sublink:hover { color: var(--accent); }

.icon-ext {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  opacity: 0.6;
  margin-left: auto;
}

/* ── Legacy Section ───────────────────────────────────────────── */

.legacy-section {
  background-color: var(--bg); /* Switched to bg for contrast */
  padding: 100px 0 80px; /* Top padding for divider */
  position: relative;
  z-index: 1;
  transition: background-color 0.3s ease;
}

.legacy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.legacy-item {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  transition: opacity var(--transition);
}

.legacy-item:hover {
    opacity: 0.8;
}

.expired-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-dim);
  text-decoration: line-through;
  text-decoration-color: rgba(239, 68, 68, 0.3);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.icon-sm {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--red);
  opacity: 0.6;
}

/* ── Badges ────────────────────────────────────────────────────── */

.badge {
    font-size: 0.625rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: 4px;
    margin-left: auto;
    flex-shrink: 0;
}

.badge-github {
    background: rgba(99, 102, 241, 0.12);
    color: #6366f1;
    border: 1px solid rgba(99, 102, 241, 0.25);
}

.badge-client {
    background: rgba(245, 158, 11, 0.12);
    color: var(--partner);
    border: 1px solid rgba(245, 158, 11, 0.25);
}

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

.site-footer {
  background-color: var(--footer-bg);
  /* Removed border-top as requested */
  padding: 100px 0 40px; /* Top padding for divider */
  position: relative;
  z-index: 1;
  transition: background-color 0.3s ease;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: center;
  text-align: center;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
}

.footer-logo {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.footer-version {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: 'SF Mono', 'Fira Code', 'Fira Mono', monospace;
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
  margin-top: 2px;
  display: inline-block;
  letter-spacing: 0.02em;
}

.footer-right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

/* ── Theme toggle ─────────────────────────────────────────────── */

.theme-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
}

.theme-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dim);
  transition: color var(--transition), background-color var(--transition);
}

.theme-btn svg {
  width: 14px;
  height: 14px;
  pointer-events: none;
}

.theme-btn:hover {
  color: var(--text);
  background-color: var(--border);
}

.theme-btn.active {
  color: var(--accent);
  background-color: rgba(79, 142, 247, 0.12);
}

[data-theme="light"] .theme-btn.active {
  background-color: rgba(46, 110, 230, 0.10);
}

/* ── Scroll-reveal ────────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
  transition-delay: var(--delay, 0ms);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ───────────────────────────────────────────────── */

@media (min-width: 640px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
    align-items: flex-end;
  }

  .footer-brand  { align-items: flex-start; }
  .footer-right  { align-items: flex-end; }
}

@media (min-width: 768px) {
  .nav-hamburger { display: none; }
  .nav-links     { display: flex; }
}

@media (min-width: 900px) {
  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .container     { padding: 0 40px; }
}

@media (max-width: 767px) {
  .nav-links {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    position: fixed;
    top: var(--nav-height);
    right: 0;
    bottom: 0;
    width: min(300px, 80vw);
    background-color: #0f0f17;
    border-left: 1px solid var(--border);
    padding: 24px 20px;
    z-index: 99;
    transform: translateX(100%);
    transition: transform 0.28s ease;
    overflow-y: auto;
  }

  [data-theme="light"] .nav-links {
    background-color: #f0f0f5;
  }

  .nav-links.open { transform: translateX(0); }

  .nav-link {
    width: 100%;
    padding: 10px 14px;
    font-size: 1rem;
  }
}