/* ============================================================
   GemsFX Website — Dark Theme Stylesheet
   ============================================================ */

:root {
  /* Colour palette */
  --bg-base:       #0f172a;
  --bg-surface:    #1e293b;
  --bg-elevated:   #263248;
  --bg-card:       #1e293b;
  --bg-card-hover: #263248;
  --border:        #334155;
  --border-subtle: #1e293b;

  --accent:        #6366f1;
  --accent-light:  #818cf8;
  --accent-dim:    #312e81;
  --teal:          #14b8a6;
  --teal-dim:      #0d4440;

  --text-primary:  #f1f5f9;
  --text-secondary:#94a3b8;
  --text-muted:    #64748b;
  --text-code:     #a5f3fc;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 0 3px rgba(99,102,241,0.25);

  --transition: 150ms ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
}

a { color: var(--accent-light); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ── Layout helpers ── */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 1.5rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.site-logo img {
  width: 32px;
  height: 32px;
}

.site-logo span { color: var(--accent-light); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}

.site-nav a:hover {
  background: var(--bg-surface);
  color: var(--text-primary);
  text-decoration: none;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(99,102,241,0.18) 0%, transparent 70%);
  pointer-events: none;
}

.hero-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
}

.badge.accent { background: var(--accent-dim); border-color: var(--accent); color: var(--accent-light); }
.badge.teal   { background: var(--teal-dim);   border-color: var(--teal);   color: var(--teal); }

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero h1 .gems { color: var(--accent-light); }
.hero h1 .fx   { color: var(--teal); }

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 2.5rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn:hover { opacity: 0.9; transform: translateY(-1px); text-decoration: none; }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 20px rgba(99,102,241,0.35);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

/* ============================================================
   INSTALLATION
   ============================================================ */
.install-section {
  padding: 3rem 0;
}

.section-heading {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}

.section-sub {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2rem;
}

.tabs {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  max-width: 680px;
}

.tab-buttons {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  flex: 1;
  padding: 0.65rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.tab-btn:hover { background: var(--bg-elevated); color: var(--text-primary); }
.tab-btn.active { background: var(--bg-elevated); color: var(--accent-light); border-bottom: 2px solid var(--accent); }

.tab-panel { display: none; position: relative; }
.tab-panel.active { display: block; }

.tab-panel pre {
  padding: 1.25rem 1.5rem;
  font-size: 0.85rem;
  font-family: "SF Mono", "Fira Code", Consolas, monospace;
  color: var(--text-code);
  overflow-x: auto;
  line-height: 1.7;
}

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 0.3rem 0.65rem;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.copy-btn:hover { color: var(--text-primary); border-color: var(--accent); }
.copy-btn.copied { color: var(--teal); border-color: var(--teal); }

/* ============================================================
   CONTROLS GALLERY
   ============================================================ */
.gallery-section {
  padding: 4rem 0 2rem;
}

/* ── Toolbar ── */
.gallery-toolbar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.search-wrap {
  position: relative;
  max-width: 340px;
}

.search-wrap svg {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

#search-input {
  width: 100%;
  padding: 0.6rem 1rem 0.6rem 2.4rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

#search-input:focus {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

#search-input::placeholder { color: var(--text-muted); }

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pill {
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.pill:hover { border-color: var(--accent); color: var(--accent-light); }

.pill.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent-light);
}

/* ── No results ── */
.no-results {
  display: none;
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-muted);
}

.no-results.visible { display: block; }

/* ── Card grid ── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.25rem;
}

/* ── Control card ── */
.control-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.control-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.control-card:not([data-visible]) { display: none; }

.card-img-wrap {
  background: var(--bg-base);
  border-bottom: 1px solid var(--border-subtle);
  height: 200px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
}

.card-img-wrap img {
  height: 100%;
  width: 100%;
  object-fit: contain;
}

.card-no-img {
  width: 100%;
  min-height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.card-body {
  padding: 1rem 1.1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}

.card-category {
  display: inline-flex;
  align-items: center;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--teal);
}

.card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.5;
  flex: 1;
}

.card-footer {
  margin-top: 0.75rem;
}

.card-api-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-light);
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--accent-dim);
  border-radius: var(--radius-sm);
  transition: background var(--transition), border-color var(--transition);
}

.card-api-link:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  text-decoration: none;
}

/* ============================================================
   UTILITIES SECTION
   ============================================================ */
.utils-section {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
}

.utils-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.util-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  transition: border-color var(--transition);
  display: flex;
  flex-direction: column;
}

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

.util-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
}

.util-package {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: "SF Mono", "Fira Code", Consolas, monospace;
  margin-bottom: 0.4rem;
}

.util-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
  flex: 1;
}

.util-api-link {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.util-api-link:hover { text-decoration: underline; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
  .site-nav a span { display: none; }
  .hero { padding: 3rem 0 2.5rem; }
  .cards-grid { grid-template-columns: 1fr; }
  .utils-grid { grid-template-columns: 1fr; }
  .gallery-toolbar { flex-direction: column; }
  .search-wrap { max-width: 100%; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .tab-btn { font-size: 0.8rem; padding: 0.55rem 0.5rem; }
}

/* ── Category color accents per pill ── */
[data-cat-color="datetime"]   .card-category { color: #f59e0b; }
[data-cat-color="input"]      .card-category { color: #34d399; }
[data-cat-color="layout"]     .card-category { color: #60a5fa; }
[data-cat-color="images"]     .card-category { color: #f472b6; }
[data-cat-color="progress"]   .card-category { color: #a78bfa; }
[data-cat-color="data"]       .card-category { color: var(--teal); }
[data-cat-color="other"]      .card-category { color: #fb923c; }
[data-cat-color="paging"]     .card-category { color: #38bdf8; }

.pill[data-filter="datetime"]  { --pill-color: #f59e0b; }
.pill[data-filter="input"]     { --pill-color: #34d399; }
.pill[data-filter="layout"]    { --pill-color: #60a5fa; }
.pill[data-filter="images"]    { --pill-color: #f472b6; }
.pill[data-filter="progress"]  { --pill-color: #a78bfa; }
.pill[data-filter="data"]      { --pill-color: var(--teal); }
.pill[data-filter="other"]     { --pill-color: #fb923c; }
.pill[data-filter="paging"]    { --pill-color: #38bdf8; }

.pill[data-filter].active {
  background: color-mix(in srgb, var(--pill-color) 15%, transparent);
  border-color: var(--pill-color);
  color: var(--pill-color);
}