/* GenForge — flat design system
   Palette: AI purple + generation pink (light mode first) */

:root {
  --color-primary: #7C3AED;
  --color-primary-dark: #6D28D9;
  --color-on-primary: #FFFFFF;
  --color-secondary: #6366F1;
  --color-accent: #EC4899;
  --color-background: #FAF5FF;
  --color-surface: #FFFFFF;
  --color-foreground: #0F172A;
  --color-muted-text: #475569;
  --color-muted: #F7F3FD;
  --color-border: #EFE7FC;
  --color-success: #15803D;
  --color-success-bg: #DCFCE7;
  --radius: 14px;
  --radius-sm: 9px;
  --container: 1120px;
  --font: 'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --gradient-brand: linear-gradient(135deg, #7C3AED 0%, #A855F7 55%, #EC4899 100%);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px rgba(124, 58, 237, 0.08), 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 14px 34px rgba(124, 58, 237, 0.14), 0 3px 8px rgba(15, 23, 42, 0.07);
  --shadow-btn: 0 4px 14px rgba(124, 58, 237, 0.35);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-foreground);
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-primary); }
a:hover { color: var(--color-primary-dark); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  background: rgba(255, 255, 255, 0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-foreground);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo svg { width: 32px; height: 32px; }

.main-nav { display: flex; align-items: center; gap: 4px; }

.main-nav a {
  text-decoration: none;
  color: var(--color-muted-text);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  transition: color 150ms ease, background-color 150ms ease;
}

.main-nav a:hover { color: var(--color-primary); background: var(--color-muted); }
.main-nav a[aria-current="page"] { color: var(--color-primary); background: var(--color-muted); }

.nav-toggle { display: none; }

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 56px;
  text-align: center;
  background:
    radial-gradient(640px 320px at 18% 0%, rgba(124, 58, 237, 0.10), transparent 70%),
    radial-gradient(640px 320px at 85% 10%, rgba(236, 72, 153, 0.09), transparent 70%);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lead {
  font-size: 1.125rem;
  color: var(--color-muted-text);
  max-width: 640px;
  margin: 0 auto 32px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 8px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-muted-text);
}

.badge svg { width: 14px; height: 14px; color: var(--color-success); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 28px;
  cursor: pointer;
  text-decoration: none;
  min-height: 48px;
  transition: filter 150ms ease, transform 150ms ease, box-shadow 150ms ease, background-color 150ms ease, color 150ms ease;
}

.btn-primary {
  background: var(--gradient-brand);
  color: var(--color-on-primary);
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  filter: brightness(1.07);
  transform: translateY(-1px);
  color: var(--color-on-primary);
}
.btn-primary:active { transform: translateY(0) scale(0.99); }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-muted); color: var(--color-primary-dark); }

.btn:focus-visible, a:focus-visible, button:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---------- Tool cards grid ---------- */
.section { padding: 48px 0; }

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  text-align: center;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.section-sub {
  text-align: center;
  color: var(--color-muted-text);
  max-width: 560px;
  margin: 0 auto 40px;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-decoration: none;
  color: var(--color-foreground);
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-sm);
  transition: border-color 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}

.tool-card:hover {
  border-color: rgba(124, 58, 237, 0.45);
  color: var(--color-foreground);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.tool-card .tool-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--gradient-brand);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.tool-card .tool-icon svg { width: 22px; height: 22px; }

.tool-card h3 { margin: 0; font-size: 1.125rem; font-weight: 700; }

.tool-card p { margin: 0; color: var(--color-muted-text); font-size: 0.9375rem; }

.tool-card .tool-cta {
  margin-top: auto;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9375rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ---------- Tool page ---------- */
.breadcrumbs {
  padding: 16px 0 0;
  font-size: 0.875rem;
  color: var(--color-muted-text);
}

.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; }
.breadcrumbs li + li::before { content: "/"; margin-right: 8px; color: var(--color-border); }
.breadcrumbs a { color: var(--color-muted-text); text-decoration: none; }
.breadcrumbs a:hover { color: var(--color-primary); }

.tool-hero { padding: 32px 0 24px; text-align: center; }

.tool-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.tool-hero p.lead {
  color: var(--color-muted-text);
  font-size: 1.0625rem;
  max-width: 620px;
  margin: 0 auto;
}

.tool-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  max-width: 720px;
  margin: 24px auto 0;
  box-shadow: var(--shadow-md);
}

.field { margin-bottom: 20px; text-align: left; }

.field label {
  display: block;
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 8px;
}

.field .hint { font-size: 0.8125rem; color: var(--color-muted-text); margin-top: 6px; }

.field input[type="text"], .field select, .field textarea {
  width: 100%;
  font-family: var(--font);
  font-size: 1rem;
  color: var(--color-foreground);
  background: var(--color-background);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 13px 14px;
  min-height: 48px;
  transition: border-color 150ms ease;
}

.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--color-primary); outline: none; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* Results */
.results { max-width: 720px; margin: 24px auto 0; display: grid; gap: 12px; }

.result-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  animation: fadeUp 200ms ease both;
}

.result-item .result-text { white-space: pre-wrap; word-break: break-word; }

.copy-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-muted);
  color: var(--color-primary);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 10px 14px;
  min-height: 44px;
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease;
}

.copy-btn:hover { background: var(--color-primary); color: var(--color-on-primary); }
.copy-btn.copied { background: var(--color-success-bg); color: var(--color-success); }
.copy-btn svg { width: 16px; height: 16px; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- Content sections ---------- */
.content { max-width: 720px; margin: 0 auto; padding: 48px 20px; }

.content h2 { font-size: 1.5rem; font-weight: 700; margin: 40px 0 12px; letter-spacing: -0.01em; }
.content h2:first-child { margin-top: 0; }
.content h3 { font-size: 1.125rem; font-weight: 700; margin: 28px 0 8px; }
.content p, .content li { color: var(--color-muted-text); }
.content ul, .content ol { padding-left: 22px; }

/* FAQ */
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.faq-item summary {
  font-weight: 600;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--color-primary);
  flex-shrink: 0;
}

.faq-item[open] summary::after { content: "–"; }

.faq-item .faq-body { padding: 0 20px 18px; color: var(--color-muted-text); }
.faq-item .faq-body p { margin-top: 0; }

/* Related tools */
.related { background: var(--color-muted); border-radius: var(--radius); padding: 28px; margin-top: 48px; }
.related h2 { margin-top: 0; }
.related ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.related a { font-weight: 600; text-decoration: none; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: 64px;
  padding: 40px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-grid h4 { margin: 0 0 12px; font-size: 0.9375rem; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-grid a { color: var(--color-muted-text); text-decoration: none; font-size: 0.9375rem; }
.footer-grid a:hover { color: var(--color-primary); }
.footer-grid p { color: var(--color-muted-text); font-size: 0.9375rem; max-width: 320px; }

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  font-size: 0.875rem;
  color: var(--color-muted-text);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .hero { padding: 48px 0 40px; }
  .field-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-foreground);
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 20px;
    gap: 4px;
  }

  .main-nav.open { display: flex; }
  .main-nav a { padding: 14px; }
}

@media (max-width: 480px) {
  .result-item { flex-direction: column; align-items: stretch; }
  .copy-btn { justify-content: center; }
}