/* ========================================
   TrendsAPI.io - Premium Tech Design
   Light + Dark Mode
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-page: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8FAFC;
  --bg-section: #F8FAFC;
  --bg-elevated: #F1F5F9;
  --bg-code: #0F172A;
  --text-primary: #0F172A;
  --text-body: #334155;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border-light: rgba(15, 23, 42, 0.07);
  --border-medium: rgba(15, 23, 42, 0.12);
  --border-strong: rgba(15, 23, 42, 0.18);
  --accent-primary: #3B82F6;
  --accent-secondary: #06B6D4;
  --accent-text: #2563EB;
  --accent-wash: rgba(59, 130, 246, 0.07);
  --accent-wash-strong: rgba(59, 130, 246, 0.14);
  --gradient-text: linear-gradient(135deg, #0F172A 0%, #475569 100%);
  --gradient-text-accent: linear-gradient(135deg, #2563EB 0%, #0891B2 50%, #6366F1 100%);
  --gradient-button: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
  --gradient-card-border: linear-gradient(135deg, rgba(59,130,246,0.2), rgba(6,182,212,0.15), rgba(129,140,248,0.1));
  --nav-bg: rgba(255, 255, 255, 0.7);
  --nav-bg-scrolled: rgba(255, 255, 255, 0.92);
  --footer-bg: #0F172A;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
  --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.06);
  --glow-color: rgba(59,130,246,0.04);
  --glow-border: rgba(59,130,246,0.15);
  --glow-shadow: rgba(59,130,246,0.08);
  --grid-line: rgba(15, 23, 42, 0.04);
  --grid-glow-1: rgba(59,130,246,0.06);
  --grid-glow-2: rgba(6,182,212,0.03);
  --trend-green: #16A34A;
}

.dark {
  --bg-page: #09090B;
  --bg-card: #18181B;
  --bg-card-hover: #1f1f23;
  --bg-section: #0C0C0F;
  --bg-elevated: #27272A;
  --bg-code: #0A0A0C;
  --text-primary: #FAFAFA;
  --text-body: #A1A1AA;
  --text-secondary: #71717A;
  --text-muted: #52525B;
  --border-light: rgba(255, 255, 255, 0.06);
  --border-medium: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.16);
  --accent-primary: #3B82F6;
  --accent-secondary: #06B6D4;
  --accent-text: #60A5FA;
  --accent-wash: rgba(59, 130, 246, 0.1);
  --accent-wash-strong: rgba(59, 130, 246, 0.2);
  --gradient-text: linear-gradient(135deg, #FAFAFA 0%, #A1A1AA 100%);
  --gradient-text-accent: linear-gradient(135deg, #60A5FA 0%, #06B6D4 50%, #818CF8 100%);
  --gradient-button: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
  --nav-bg: rgba(9, 9, 11, 0.6);
  --nav-bg-scrolled: rgba(9, 9, 11, 0.85);
  --footer-bg: #050507;
  --shadow-card: none;
  --shadow-card-hover: 0 8px 32px rgba(0,0,0,0.3);
  --glow-color: rgba(59,130,246,0.06);
  --glow-border: rgba(59,130,246,0.2);
  --glow-shadow: rgba(59,130,246,0.06);
  --grid-line: rgba(255, 255, 255, 0.03);
  --grid-glow-1: rgba(59,130,246,0.12);
  --grid-glow-2: rgba(6,182,212,0.06);
  --trend-green: #22C55E;
}

* { box-sizing: border-box; }
img { max-width: 100%; height: auto; }
:focus-visible { outline: 2px solid var(--accent-primary); outline-offset: 2px; }
button:focus:not(:focus-visible) { outline: none; }

input, textarea {
  transition: border-color 0.2s ease;
}
input:focus, textarea:focus {
  border-color: rgba(59,130,246,0.4);
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--text-body);
  background: var(--bg-page);
  transition: background-color 0.35s ease, color 0.35s ease;
}

html { scroll-behavior: smooth; }
::selection { background: var(--accent-wash-strong); color: var(--text-primary); }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }

.section-padding { padding: 7rem 1.5rem; }

.section-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.375rem 1rem;
  background: var(--accent-wash); border: 1px solid var(--accent-wash-strong);
  border-radius: 9999px; font-size: 0.8125rem; font-weight: 500;
  color: var(--accent-text); letter-spacing: 0.02em;
}

.gradient-text { background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.gradient-text-accent { background: var(--gradient-text-accent); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.glow-card {
  position: relative; background: var(--bg-card);
  border: 1px solid var(--border-light); border-radius: 16px;
  overflow: hidden; box-shadow: var(--shadow-card);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.glow-card::before {
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), var(--glow-color), transparent 40%);
  opacity: 0; transition: opacity 0.4s ease; pointer-events: none; z-index: 0;
}
.glow-card:hover { border-color: var(--glow-border); box-shadow: 0 0 40px var(--glow-shadow), var(--shadow-card-hover); }
.glow-card:hover::before { opacity: 1; }
.glow-card > * { position: relative; z-index: 1; }

.grid-bg {
  position: absolute; inset: 0;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 50%, black 30%, transparent 70%);
}
.grid-bg-glow {
  position: absolute; top: 50vh; left: 50vw; transform: translate(-50%, -50%);
  width: 800px; height: 800px;
  background: radial-gradient(circle, var(--grid-glow-1) 0%, var(--grid-glow-2) 30%, transparent 60%);
  pointer-events: none; animation: pulse-glow 8s ease-in-out infinite;
  contain: layout paint;
  will-change: opacity;
}
@keyframes pulse-glow {
  0%, 100% { opacity: 0.6; transform: translate(-50%, -50%); }
  50% { opacity: 1; transform: translate(-50%, -50%); }
}

.floating-orb {
  position: absolute; border-radius: 50%; filter: blur(80px);
  pointer-events: none; animation: float-orb 12s ease-in-out infinite;
}
@keyframes float-orb {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(30px, -20px); }
  66% { transform: translate(-20px, 15px); }
}

.code-block { background: var(--bg-code); border-radius: 12px; overflow: hidden; border: 1px solid rgba(255,255,255,0.06); }
.code-header { display: flex; align-items: center; justify-content: space-between; padding: 0.75rem 1rem; background: rgba(255,255,255,0.02); border-bottom: 1px solid rgba(255,255,255,0.06); }
.code-dots { display: flex; gap: 6px; }
.code-dot { width: 10px; height: 10px; border-radius: 50%; }
.code-dot--red { background: #ff5f57; }
.code-dot--yellow { background: #febc2e; }
.code-dot--green { background: #28c840; }
.code-lang { font-size: 0.75rem; color: rgba(255,255,255,0.4); font-family: 'JetBrains Mono', monospace; }
.code-body { padding: 1.25rem; overflow-x: auto; }
.code-body pre { margin: 0; font-family: 'JetBrains Mono', 'SF Mono', monospace; font-size: 0.8125rem; line-height: 1.7; color: #e2e8f0; white-space: pre; tab-size: 2; }

.typing-cursor::after { content: '|'; color: var(--accent-primary); animation: blink 1s step-end infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.theme-toggle {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--border-light); background: transparent;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); flex-shrink: 0;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.theme-toggle:hover { background: var(--accent-wash); color: var(--accent-text); border-color: var(--accent-wash-strong); }
.theme-toggle svg { width: 15px; height: 15px; }

/* Header */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 0.75rem; height: 3.5rem;
  background: var(--nav-bg);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border: 0.5px solid var(--border-light); border-radius: 9999px;
  margin: 1rem 1.5rem;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.is-scrolled { background: var(--nav-bg-scrolled); box-shadow: 0 4px 30px rgba(0,0,0,0.3); }

.logo-link { display: flex; align-items: center; gap: 0.5rem; text-decoration: none; padding: 0 0.25rem; flex-shrink: 0; }
.logo-badge { width: 30px; height: 30px; border-radius: 8px; background: var(--gradient-button); display: flex; align-items: center; justify-content: center; color: white; }
.logo-badge svg { width: 16px; height: 16px; stroke-width: 2.5; }
.logo-text { font-weight: 700; font-size: 0.9375rem; color: var(--text-primary); letter-spacing: -0.01em; }
.logo-accent { color: var(--accent-text); }

.desktop-nav { display: flex; align-items: center; gap: 0.125rem; }
.nav-link { color: var(--text-primary); text-decoration: none; font-size: 0.8125rem; font-weight: 500; padding: 6px 12px; border-radius: 9999px; transition: background 0.2s ease, color 0.2s ease; }
.nav-link:hover { background: var(--accent-wash); color: var(--text-primary); }
.nav-link.active { color: var(--text-primary); background: var(--accent-wash); }

.header-actions { display: flex; align-items: center; gap: 0.375rem; }
.header-cta { background: var(--gradient-button); color: white; text-decoration: none; border-radius: 9999px; padding: 7px 18px; font-weight: 600; font-size: 0.8125rem; transition: transform 0.2s ease, box-shadow 0.2s ease; display: inline-flex; }
.header-cta:hover { transform: scale(1.03); box-shadow: 0 4px 16px rgba(59,130,246,0.4); }

.mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 6px; color: var(--text-primary); }

.mobile-menu {
  position: fixed; top: 4.5rem; left: 1rem; right: 1rem; z-index: 49;
  background: var(--nav-bg-scrolled); backdrop-filter: blur(20px);
  border-radius: 16px; border: 1px solid var(--border-light); padding: 0.75rem;
  box-shadow: 0 12px 40px rgba(0,0,0,0.4); display: none;
}
.mobile-menu.is-open { display: block; }
.mobile-link { display: block; padding: 12px 16px; font-size: 0.9375rem; font-weight: 500; color: var(--text-body); text-decoration: none; border-radius: 10px; }
.mobile-link:hover { background: var(--accent-wash); color: var(--text-primary); }

/* Footer */
.site-footer { background: var(--footer-bg); color: rgba(250,250,250,0.5); padding: 4rem 1.5rem 2rem; border-top: 1px solid var(--border-light); }
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 2.5rem; padding-bottom: 3rem; border-bottom: 1px solid var(--border-light); }
.footer-logo { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; text-decoration: none; }
.site-footer .logo-text { color: #FAFAFA; }
.site-footer .logo-accent { color: var(--accent-text); }
.footer-desc { font-size: 0.8125rem; line-height: 1.6; max-width: 280px; margin: 0; }
.footer-title { color: rgba(250,250,250,0.7); font-size: 0.75rem; font-weight: 600; margin-bottom: 1rem; letter-spacing: 0.08em; text-transform: uppercase; }
.footer-links { display: flex; flex-direction: column; gap: 0.375rem; }
.footer-link { color: rgba(250,250,250,0.35); font-size: 0.875rem; text-decoration: none; transition: color 0.2s ease; display: inline-flex; align-items: center; gap: 5px; }
.footer-link:hover { color: #FAFAFA; }
.footer-link-inline svg { width: 12px; height: 12px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 1.5rem; flex-wrap: wrap; gap: 1rem; }
.footer-bottom p { font-size: 0.75rem; margin: 0; color: rgba(250,250,250,0.2); }
.footer-bottom-links { display: flex; gap: 1.5rem; }
.footer-bottom-links a { font-size: 0.75rem; color: rgba(250,250,250,0.2); text-decoration: none; transition: color 0.2s ease; }
.footer-bottom-links a:hover { color: rgba(250,250,250,0.5); }

/* Helpers */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

.glow-hover { transition: border-color 0.2s ease, background 0.2s ease; }
.glow-hover:hover { background: var(--bg-card-hover); }

/* Tabs */
.tab-button { display: inline-flex; align-items: center; gap: 0.375rem; padding: 8px 16px; border-radius: 9999px; border: 1px solid var(--border-light); background: var(--bg-card); color: var(--text-secondary); font-size: 0.8125rem; font-weight: 500; cursor: pointer; transition: all 0.2s ease; }
.tab-button.active { border: 1px solid rgba(143,236,120,0.3); background: var(--accent-wash); color: var(--accent-text); }

/* FAQ */
.accordion-item { border: 1px solid var(--border-light); background: var(--bg-card); border-radius: 12px; margin-bottom: 0.625rem; overflow: hidden; }
.accordion-trigger { width: 100%; text-align: left; padding: 1.125rem 1.5rem; font-weight: 600; font-size: 0.9375rem; color: var(--text-primary); background: transparent; border: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; }
.accordion-trigger svg { transition: transform 0.2s ease; }
.accordion-item.open .accordion-trigger svg { transform: rotate(180deg); }
.accordion-content { max-height: 0; overflow: hidden; transition: max-height 0.25s ease; padding: 0 1.5rem; color: var(--text-secondary); font-size: 0.875rem; line-height: 1.6; }
.accordion-item.open .accordion-content { max-height: 200px; padding-bottom: 1.125rem; }

/* Buttons */
.button-primary { background: var(--gradient-button); color: white; border: none; border-radius: 9999px; padding: 14px 28px; font-family: 'Inter', sans-serif; font-weight: 600; font-size: 0.9375rem; cursor: pointer; display: inline-flex; align-items: center; gap: 0.5rem; line-height: 1.3; transition: transform 0.2s ease, box-shadow 0.2s ease; text-decoration: none; }
.button-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(59,130,246,0.4); }
.button-secondary { background: transparent; color: var(--text-primary); border: 1px solid var(--border-medium); border-radius: 9999px; padding: 14px 28px; font-weight: 500; font-size: 0.9375rem; cursor: pointer; display: inline-flex; align-items: center; gap: 0.5rem; line-height: 1.3; transition: background 0.2s ease, border-color 0.2s ease; }
.button-secondary:hover { background: var(--accent-wash); border-color: rgba(59,130,246,0.3); }

/* Responsive */
@media (max-width: 767px) {
  .section-padding { padding: 4.5rem 1rem; }
  .desktop-nav { display: none; }
  .mobile-toggle { display: flex; }
  .header-cta { display: none; }
}
@media (min-width: 768px) {
  .mobile-toggle { display: none; }
  .mobile-menu { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}