/* ─── Variables (dark — default) ────────────────────────────────────────────── */
:root {
  --bg:          #0d0d14;
  --surface:     #12121a;
  --surface-2:   #18182a;
  --border:      #1e1e2e;
  --border-2:    #2a2a3e;

  --text:        #e2e8f0;
  --text-muted:  #94a3b8;
  --text-faint:  #475569;

  --accent:      #6366f1;
  --accent-hover:#818cf8;
  --accent-glow: rgba(99,102,241,0.25);

  --success:     #10b981;
  --warn:        #f59e0b;
  --danger:      #ef4444;

  --radius:      8px;
  --radius-lg:   14px;
  --shadow:      0 4px 24px rgba(0,0,0,0.4);

  --nav-bg:      rgba(13,13,20,0.85);

  --font:        'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono:        'JetBrains Mono', 'Courier New', monospace;
}

/* ─── Light mode variables ───────────────────────────────────────────────────── */
/* System preference */
@media (prefers-color-scheme: light) {
  :root {
    --bg:          #ffffff;
    --surface:     #f8fafc;
    --surface-2:   #f1f5f9;
    --border:      #e2e8f0;
    --border-2:    #cbd5e1;
    --text:        #0f172a;
    --text-muted:  #475569;
    --text-faint:  #94a3b8;
    --accent:      #4f46e5;
    --accent-hover:#6366f1;
    --accent-glow: rgba(79,70,229,0.12);
    --shadow:      0 4px 24px rgba(0,0,0,0.08);
    --nav-bg:      rgba(255,255,255,0.85);
  }
}

/* Manual override: light */
[data-theme="light"] {
  --bg:          #ffffff;
  --surface:     #f8fafc;
  --surface-2:   #f1f5f9;
  --border:      #e2e8f0;
  --border-2:    #cbd5e1;
  --text:        #0f172a;
  --text-muted:  #475569;
  --text-faint:  #94a3b8;
  --accent:      #4f46e5;
  --accent-hover:#6366f1;
  --accent-glow: rgba(79,70,229,0.12);
  --shadow:      0 4px 24px rgba(0,0,0,0.08);
  --nav-bg:      rgba(255,255,255,0.85);
}

/* Manual override: dark (beats the system light media query) */
[data-theme="dark"] {
  --bg:          #0d0d14;
  --surface:     #12121a;
  --surface-2:   #18182a;
  --border:      #1e1e2e;
  --border-2:    #2a2a3e;
  --text:        #e2e8f0;
  --text-muted:  #94a3b8;
  --text-faint:  #475569;
  --accent:      #6366f1;
  --accent-hover:#818cf8;
  --accent-glow: rgba(99,102,241,0.25);
  --shadow:      0 4px 24px rgba(0,0,0,0.4);
}

/* ─── Reset ──────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* ─── Typography ──────────────────────────────────────────────────────────────── */
h1, h2, h3, h4 { line-height: 1.2; letter-spacing: -0.025em; color: var(--text); }
h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 600; }
p  { color: var(--text-muted); }

/* ─── Layout ──────────────────────────────────────────────────────────────────── */
.container { max-width: min(1160px, 92vw); margin: 0 auto; }

/* ─── Header ──────────────────────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; gap: 2rem;
  padding: 1rem 0;
}
.logo {
  font-size: 1.25rem; font-weight: 800; color: var(--text);
  letter-spacing: -0.03em; white-space: nowrap;
}
.logo:hover { color: var(--text); }
.header-nav {
  display: flex; align-items: center; gap: 1.5rem; margin-left: auto;
}
.header-nav a { color: var(--text-muted); font-size: 0.9rem; font-weight: 500; }
.header-nav a:hover { color: var(--text); }
.mobile-menu-btn { display: none; }

/* ─── Buttons ─────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.9rem; font-weight: 600;
  cursor: pointer; border: none;
  transition: all 0.15s;
  white-space: nowrap; text-decoration: none;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); color: #fff; box-shadow: 0 0 0 3px var(--accent-glow); }
.btn.ghost  { background: transparent; color: var(--text); border: 1px solid var(--border-2); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn.large  { padding: 0.9rem 2rem; font-size: 1rem; }
.btn.small  { padding: 0.4rem 0.9rem; font-size: 0.82rem; }
.btn.full   { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ─── Hero ────────────────────────────────────────────────────────────────────── */
.hero { padding: 6rem 0 4rem; overflow: hidden; }
.hero-inner { display: flex; flex-direction: column; align-items: center; text-align: center; }
.hero-badge {
  display: inline-block; padding: 0.25rem 0.9rem;
  background: rgba(99,102,241,0.12); border: 1px solid rgba(99,102,241,0.3);
  border-radius: 100px; font-size: 0.8rem; font-weight: 600;
  color: var(--accent); margin-bottom: 1.5rem;
}
.gradient-text {
  background: linear-gradient(135deg, #6366f1, #a78bfa, #22d3ee);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-sub { font-size: 1.15rem; max-width: 560px; margin: 1.2rem 0 2rem; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; }
.hero-code-preview { width: 100%; max-width: 720px; margin-top: 3.5rem; }

/* ─── Code Window ─────────────────────────────────────────────────────────────── */
.code-window {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow);
}
.code-window-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 0.75rem 1rem; border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.code-window-bar span:not(.code-window-title) {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--border-2);
}
.code-window-title { margin-left: auto; font-size: 0.78rem; color: var(--text-faint); font-family: var(--mono); }
.code-block {
  padding: 1.4rem 1.5rem; font-family: var(--mono);
  font-size: 0.82rem; line-height: 1.7; overflow-x: auto;
  color: var(--text-muted); text-align: left;
}
.code-block.small { font-size: 0.78rem; }
.c-keyword { color: #818cf8; font-weight: 600; }
.c-string   { color: #86efac; }
.c-comment  { color: var(--text-faint); font-style: italic; }
.c-key      { color: #67e8f9; }
.c-num      { color: #fb923c; }
code { font-family: var(--mono); }

/* ─── Logo strip ──────────────────────────────────────────────────────────────── */
.logos-strip { padding: 2.5rem 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.logos-label { text-align: center; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-faint); margin-bottom: 1rem; }
.logos-row { display: flex; justify-content: center; gap: 2.5rem; flex-wrap: wrap; }
.logos-row span { font-size: 0.85rem; font-weight: 600; color: var(--text-faint); }

/* ─── Sections ────────────────────────────────────────────────────────────────── */
.section { padding: 5rem 0; }
.section.alt { background: var(--surface); }
.section-label {
  display: inline-block; font-size: 0.78rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent);
  margin-bottom: 0.75rem;
}
.section-title { margin-bottom: 1rem; }
.section-sub { font-size: 1.05rem; max-width: 520px; margin-bottom: 2.5rem; }

/* ─── Steps ───────────────────────────────────────────────────────────────────── */
.steps-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; margin-top: 2.5rem; }
.step-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem; }
.step-num { font-size: 2.5rem; font-weight: 800; color: var(--border-2); font-family: var(--mono); margin-bottom: 0.75rem; }
.step-card h3 { margin-bottom: 0.5rem; font-size: 1.05rem; }

/* ─── Features ────────────────────────────────────────────────────────────────── */
.features-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; margin-top: 2.5rem; }
.feature-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.5rem; }
.feature-icon { font-size: 1.75rem; margin-bottom: 0.75rem; }
.feature-card h3 { font-size: 0.95rem; margin-bottom: 0.4rem; }
.feature-card p { font-size: 0.88rem; }

/* ─── Use cases ───────────────────────────────────────────────────────────────── */
.usecases-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.25rem; margin-top: 2.5rem; }
.usecase-card { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.5rem; }
.usecase-card h3 { font-size: 1rem; margin-bottom: 0.5rem; }
.usecase-card p  { font-size: 0.88rem; }
.usecase-tag { display: inline-block; margin-top: 1rem; font-size: 0.75rem; font-weight: 600; font-family: var(--mono); color: var(--accent); background: rgba(99,102,241,0.1); padding: 0.2rem 0.6rem; border-radius: 4px; }

/* ─── Pricing ─────────────────────────────────────────────────────────────────── */
.pricing-toggle-wrap { display: flex; gap: 1rem; margin-bottom: 2.5rem; }
.pricing-toggle { font-size: 0.9rem; font-weight: 600; cursor: pointer; color: var(--text-muted); padding: 0.5rem 1rem; border-radius: 100px; transition: all 0.15s; }
.pricing-toggle.active { background: var(--surface); color: var(--text); border: 1px solid var(--border-2); }
.save-badge { display: inline-block; background: rgba(16,185,129,0.15); color: var(--success); font-size: 0.72rem; padding: 0.1rem 0.5rem; border-radius: 4px; font-style: normal; margin-left: 0.4rem; }
.pricing-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.25rem; }
.pricing-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem; position: relative; }
.pricing-card.featured { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 0 30px var(--accent-glow); }
.plan-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--accent); color: #fff; font-size: 0.72rem; font-weight: 700; padding: 0.2rem 0.9rem; border-radius: 100px; white-space: nowrap; }
.plan-name { font-size: 0.9rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 0.75rem; }
.plan-price { margin-bottom: 0.5rem; }
.price-num { font-size: 2.4rem; font-weight: 800; color: var(--text); }
.price-per { font-size: 0.9rem; color: var(--text-muted); }
.plan-desc { font-size: 0.85rem; margin-bottom: 1.25rem; }
.plan-features { margin-top: 1.5rem; }
.plan-features li { font-size: 0.85rem; color: var(--text-muted); padding: 0.35rem 0; border-bottom: 1px solid var(--border); display: flex; align-items: flex-start; gap: 0.5rem; }
.plan-features li::before { content: '✓'; color: var(--success); font-weight: 700; flex-shrink: 0; }

/* ─── FAQ ─────────────────────────────────────────────────────────────────────── */
.faq-container { max-width: 720px; }
.faq-list { margin-top: 2rem; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 0.75rem; overflow: hidden; }
.faq-item summary {
  padding: 1.1rem 1.25rem; font-weight: 600; cursor: pointer;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
  font-size: 0.95rem;
}
.faq-item summary::after { content: '+'; font-size: 1.2rem; color: var(--accent); transition: transform 0.2s; }
.faq-item[open] summary::after { content: '−'; }
.faq-item p { padding: 0 1.25rem 1.1rem; font-size: 0.9rem; }

/* ─── CTA Section ─────────────────────────────────────────────────────────────── */
.cta-section { background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(167,139,250,0.08)); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.cta-inner { text-align: center; max-width: 540px; margin: 0 auto; }
.cta-inner h2 { margin-bottom: 0.75rem; }
.cta-inner p  { margin-bottom: 1.75rem; }

/* ─── Footer ──────────────────────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--border); padding-top: 4rem; }
.footer-inner { display: grid; grid-template-columns: 1fr 2fr; gap: 4rem; padding-bottom: 3rem; }
.footer-brand .logo { margin-bottom: 0.75rem; font-size: 1.1rem; }
.footer-brand p { font-size: 0.875rem; max-width: 280px; }
.footer-links { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.footer-col h4 { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-faint); margin-bottom: 0.75rem; }
.footer-col a  { display: block; font-size: 0.875rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.footer-col a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); padding: 1.25rem 0; }
.footer-bottom span { font-size: 0.8rem; color: var(--text-faint); }

/* ─── Auth pages ──────────────────────────────────────────────────────────────── */
.auth-page body, .auth-page { background: var(--bg); }
.auth-main { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 70px); padding: 2rem; }
.auth-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2.5rem; width: 100%; max-width: 460px; box-shadow: var(--shadow); }
.auth-header { margin-bottom: 2rem; }
.auth-header h1 { font-size: 1.7rem; margin-bottom: 0.4rem; }
.auth-header p { font-size: 0.9rem; }
.auth-switch { text-align: center; margin-top: 1.5rem; font-size: 0.875rem; color: var(--text-muted); }
.billing-card { max-width: 560px; }
.billing-note { text-align: center; font-size: 0.8rem; color: var(--text-faint); margin-top: 1rem; }
.billing-summary { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.billing-summary h4 { font-size: 0.875rem; margin-bottom: 0.75rem; }
.billing-summary li { font-size: 0.85rem; color: var(--text-muted); padding: 0.3rem 0; display: flex; gap: 0.5rem; }
.billing-summary li::before { content: '✓'; color: var(--success); }

/* ─── Forms ───────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.25rem; }
.form-group label {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.85rem; font-weight: 600; color: var(--text);
  margin-bottom: 0.5rem;
}
.label-link { font-weight: 400; font-size: 0.8rem; }
input[type=text], input[type=email], input[type=password], select, textarea {
  width: 100%; padding: 0.7rem 1rem;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border-2); border-radius: var(--radius);
  font-family: var(--font); font-size: 0.9rem;
  transition: border-color 0.15s;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
input::placeholder, textarea::placeholder { color: var(--text-faint); }
textarea { resize: vertical; }
.form-check { display: flex; gap: 0.6rem; align-items: flex-start; margin-bottom: 1.25rem; }
.form-check input[type=checkbox] { width: 16px; height: 16px; flex-shrink: 0; margin-top: 3px; accent-color: var(--accent); }
.form-check label { font-size: 0.85rem; color: var(--text-muted); margin: 0; }
.form-msg { padding: 0.75rem 1rem; border-radius: var(--radius); font-size: 0.875rem; margin-bottom: 1rem; }
.form-msg.error   { background: rgba(239,68,68,0.1);  border: 1px solid rgba(239,68,68,0.3);  color: #fca5a5; }
.form-msg.success { background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3); color: #6ee7b7; }
.helper-text { font-size: 0.78rem; color: var(--text-faint); margin-left: 0.5rem; font-weight: 400; }

/* Stripe card element container */
.stripe-card-element {
  padding: 0.75rem 1rem; background: var(--bg);
  border: 1px solid var(--border-2); border-radius: var(--radius);
}

/* ─── Responsive ──────────────────────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .features-grid  { grid-template-columns: repeat(2,1fr); }
  .pricing-grid   { grid-template-columns: repeat(2,1fr); }
  .usecases-grid  { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .steps-grid     { grid-template-columns: 1fr; }
  .features-grid  { grid-template-columns: 1fr; }
  .pricing-grid   { grid-template-columns: 1fr; }
  .usecases-grid  { grid-template-columns: 1fr; }
  .footer-inner   { grid-template-columns: 1fr; gap: 2rem; }
  .footer-links   { grid-template-columns: repeat(2,1fr); }
  .header-nav a:not(.btn) { display: none; }
  h1 { font-size: 2.2rem; }
}

/* ─── Theme toggle button ─────────────────────────────────────────────────────── */
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px;
  background: none; border: 1px solid var(--border-2);
  border-radius: var(--radius); cursor: pointer;
  color: var(--text-muted); transition: all 0.15s;
  padding: 0; flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* Show/hide sun vs moon based on current effective theme */
/* Default (dark): show sun (click → go light) */
.theme-toggle .icon-sun  { display: block; }
.theme-toggle .icon-moon { display: none; }

/* When light: show moon (click → go dark) */
[data-theme="light"] .theme-toggle .icon-sun  { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .theme-toggle .icon-sun  { display: none; }
  :root:not([data-theme="dark"]) .theme-toggle .icon-moon { display: block; }
}

/* ─── Light mode element overrides ───────────────────────────────────────────── */
/* Items that use hardcoded rgba need explicit light mode values */

[data-theme="light"] .hero-badge {
  background: rgba(79,70,229,0.08);
  border-color: rgba(79,70,229,0.2);
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .hero-badge {
    background: rgba(79,70,229,0.08);
    border-color: rgba(79,70,229,0.2);
  }
}

/* Section alt background */
[data-theme="light"] .section.alt { background: var(--surface); }

/* Pricing featured glow */
[data-theme="light"] .pricing-card.featured {
  box-shadow: 0 0 0 1px var(--accent), 0 0 20px rgba(79,70,229,0.1);
}

/* CTA section */
[data-theme="light"] .cta-section {
  background: linear-gradient(135deg, rgba(79,70,229,0.05), rgba(99,102,241,0.05));
}

/* Upgrade gate gradient */
[data-theme="light"] .upgrade-gate {
  background: linear-gradient(135deg, rgba(79,70,229,0.04), rgba(99,102,241,0.04));
  border-color: rgba(79,70,229,0.2);
}

/* Code blocks always stay dark — better readability */
.code-block,
.code-window {
  background: #0d0d14 !important;
  border-color: #1e1e2e !important;
  color: #e2e8f0 !important;
}
.code-window-bar { background: #18182a !important; border-color: #1e1e2e !important; }

/* Stripe card element in light mode */
[data-theme="light"] .stripe-card-element {
  background: var(--surface-2);
  border-color: var(--border-2);
}

/* Smooth theme transitions (excluding code blocks) */
html { transition: background-color 0.2s, color 0.2s; }
body, .site-header, .auth-card, .dash-panel, .stat-card,
.pricing-card, .feature-card, .step-card, .usecase-card,
.schema-card, .key-row, .faq-item, .site-footer {
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}