/* ==========================================================================
   ki-tool24.de Design System
   Apple-style minimalistisch, Mobile-first, Dark Mode
   ========================================================================== */

:root {
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --accent: #10B981;
  --accent-hover: #059669;
  --danger: #EF4444;
  --warning: #F59E0B;
  --dark: #0F172A;
  --white: #FFFFFF;

  --neutral-50: #F8FAFC;
  --neutral-100: #F1F5F9;
  --neutral-200: #E2E8F0;
  --neutral-300: #CBD5E1;
  --neutral-400: #94A3B8;
  --neutral-500: #64748B;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1E293B;
  --neutral-900: #0F172A;

  --bg: #FFFFFF;
  --bg-surface: #F8FAFC;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --border: #E2E8F0;

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, ui-monospace, Menlo, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-pill: 100px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.1);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  --nav-height: 64px;
  --max-width: 1200px;
  --transition: 0.2s ease;
}

[data-theme="dark"] {
  --bg: #0B1120;
  --bg-surface: #111827;
  --text: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border: #1E293B;
  --neutral-50: #111827;
  --neutral-100: #1E293B;
  --neutral-200: #334155;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.4);
}

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

/* ---- Layout ---- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-5); }
.section { padding: var(--space-8) 0; }
.section--alt { background: var(--bg-surface); }

/* ---- Navigation ---- */
.nav { position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height); background: rgba(255,255,255,0.85); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); z-index: 100; display: flex; align-items: center; }
[data-theme="dark"] .nav { background: rgba(11,17,32,0.85); }
.nav__container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-5); width: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav__logo { font-size: 18px; font-weight: 800; color: var(--text); display: flex; align-items: center; gap: var(--space-2); }
.nav__logo:hover { color: var(--primary); }
.nav__logo-icon { width: 28px; height: 28px; background: var(--primary); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: white; font-weight: 900; font-size: 14px; }
.nav__links { display: flex; align-items: center; gap: var(--space-5); }
.nav__link { color: var(--text-secondary); font-size: 14px; font-weight: 500; }
.nav__link:hover { color: var(--text); }
.nav__cta { padding: 8px 18px; background: var(--primary); color: white !important; border-radius: var(--radius-pill); font-size: 14px; font-weight: 600; }
.nav__cta:hover { background: var(--primary-hover); }

/* ---- Hero ---- */
.hero { padding: calc(var(--nav-height) + var(--space-9)) 0 var(--space-9); text-align: center; background: linear-gradient(180deg, var(--bg) 0%, var(--bg-surface) 100%); }
.hero__eyebrow { display: inline-block; font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--primary); margin-bottom: var(--space-3); background: rgba(37,99,235,0.08); padding: 6px 14px; border-radius: var(--radius-pill); }
.hero__title { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.15; color: var(--text); margin-bottom: var(--space-4); }
.hero__sub { font-size: clamp(1rem, 2vw, 1.25rem); color: var(--text-secondary); max-width: 600px; margin: 0 auto var(--space-6); line-height: 1.6; }
.hero__search { max-width: 560px; margin: 0 auto; position: relative; }
.hero__search input { width: 100%; padding: 16px 24px; padding-right: 120px; font-size: 16px; border: 2px solid var(--border); border-radius: var(--radius-xl); background: var(--bg); color: var(--text); font-family: var(--font); transition: border-color var(--transition), box-shadow var(--transition); }
.hero__search input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37,99,235,0.1); }
.hero__search button { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); padding: 10px 20px; background: var(--primary); color: white; border: none; border-radius: var(--radius-lg); font-size: 14px; font-weight: 600; cursor: pointer; font-family: var(--font); }
.hero__stats { display: flex; justify-content: center; gap: var(--space-7); margin-top: var(--space-7); }
.hero__stat { text-align: center; }
.hero__stat-number { font-size: 28px; font-weight: 800; color: var(--text); }
.hero__stat-label { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* ---- Category Cards ---- */
.categories { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: var(--space-4); }
.category-card { display: flex; align-items: center; gap: var(--space-4); padding: var(--space-5); background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg); transition: all var(--transition); text-decoration: none; }
.category-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.category-card__icon { width: 48px; height: 48px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.category-card__text { flex: 1; }
.category-card__name { font-size: 15px; font-weight: 600; color: var(--text); }
.category-card__count { font-size: 13px; color: var(--text-muted); }

/* ---- Tool Cards ---- */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: var(--space-4); }
.tool-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: var(--space-5); transition: all var(--transition); text-decoration: none; display: flex; flex-direction: column; gap: var(--space-3); }
.tool-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.tool-card__header { display: flex; align-items: center; gap: var(--space-3); }
.tool-card__logo { width: 44px; height: 44px; border-radius: var(--radius-md); object-fit: contain; background: var(--neutral-50); padding: 6px; flex-shrink: 0; }
.tool-card__title { font-size: 16px; font-weight: 700; color: var(--text); }
.tool-card__tagline { font-size: 13px; color: var(--text-secondary); line-height: 1.5; flex: 1; }
.tool-card__footer { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; margin-top: auto; }

/* ---- Badges ---- */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 10px; border-radius: var(--radius-pill); font-size: 12px; font-weight: 600; letter-spacing: 0.02em; }
.badge--free { background: rgba(16,185,129,0.1); color: #059669; }
.badge--freemium { background: rgba(37,99,235,0.1); color: #2563EB; }
.badge--paid { background: rgba(245,158,11,0.1); color: #D97706; }
.badge--enterprise { background: rgba(99,102,241,0.1); color: #6366F1; }
.badge--dsgvo-ja { background: rgba(16,185,129,0.1); color: #059669; }
.badge--dsgvo-teilweise { background: rgba(245,158,11,0.1); color: #D97706; }
.badge--dsgvo-nein { background: rgba(239,68,68,0.1); color: #DC2626; }
.badge--featured { background: rgba(37,99,235,0.1); color: var(--primary); }
.badge--category { background: var(--neutral-100); color: var(--text-secondary); }

/* ---- Rating Stars ---- */
.rating { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; font-weight: 600; color: var(--text); }
.rating__stars { color: #F59E0B; letter-spacing: 1px; }
.rating__score { color: var(--text-muted); font-weight: 400; }

/* ---- Section Headers ---- */
.section-header { margin-bottom: var(--space-6); }
.section-header__eyebrow { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--primary); margin-bottom: var(--space-2); }
.section-header__title { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; color: var(--text); letter-spacing: -0.02em; }
.section-header__desc { font-size: 15px; color: var(--text-secondary); margin-top: var(--space-2); max-width: 600px; }

/* ---- Tool Detail Page ---- */
.tool-hero { padding: calc(var(--nav-height) + var(--space-7)) 0 var(--space-7); background: var(--bg-surface); }
.tool-hero__inner { display: flex; align-items: flex-start; gap: var(--space-6); }
.tool-hero__logo { width: 80px; height: 80px; border-radius: var(--radius-lg); object-fit: contain; background: var(--bg); padding: 12px; border: 1px solid var(--border); flex-shrink: 0; }
.tool-hero__content { flex: 1; }
.tool-hero__name { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 800; color: var(--text); letter-spacing: -0.02em; }
.tool-hero__tagline { font-size: 16px; color: var(--text-secondary); margin-top: var(--space-2); }
.tool-hero__badges { display: flex; gap: var(--space-2); margin-top: var(--space-3); flex-wrap: wrap; }
.tool-hero__cta { display: inline-flex; align-items: center; gap: var(--space-2); padding: 12px 24px; background: var(--primary); color: white; border-radius: var(--radius-pill); font-weight: 600; margin-top: var(--space-4); }
.tool-hero__cta:hover { background: var(--primary-hover); color: white; }

/* ---- Pricing Table ---- */
.pricing-table { width: 100%; border-collapse: collapse; margin: var(--space-5) 0; }
.pricing-table th, .pricing-table td { padding: var(--space-3) var(--space-4); text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.pricing-table th { font-weight: 600; color: var(--text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; background: var(--bg-surface); }
.pricing-table td { color: var(--text); }
.pricing-table__price { font-weight: 700; color: var(--primary); }
.pricing-table__free { font-weight: 700; color: var(--accent); }

/* ---- Pros/Cons ---- */
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); margin: var(--space-6) 0; }
.pros-cons__list { padding: var(--space-5); border-radius: var(--radius-lg); }
.pros-cons__list--pros { background: rgba(16,185,129,0.05); border: 1px solid rgba(16,185,129,0.15); }
.pros-cons__list--cons { background: rgba(239,68,68,0.05); border: 1px solid rgba(239,68,68,0.15); }
.pros-cons__title { font-size: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-3); }
.pros-cons__list--pros .pros-cons__title { color: #059669; }
.pros-cons__list--cons .pros-cons__title { color: #DC2626; }
.pros-cons__item { font-size: 14px; color: var(--text); padding: var(--space-2) 0; line-height: 1.5; }

/* ---- Breadcrumbs ---- */
.breadcrumbs { padding: var(--space-3) 0; font-size: 13px; color: var(--text-muted); }
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--primary); }
.breadcrumbs__sep { margin: 0 var(--space-2); }

/* ---- Alternatives Grid ---- */
.alternatives { margin: var(--space-7) 0; }
.alternatives__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-4); }

/* ---- Comparison Table ---- */
.comparison-table { width: 100%; border-collapse: collapse; margin: var(--space-5) 0; }
.comparison-table th, .comparison-table td { padding: var(--space-3) var(--space-4); text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.comparison-table th { font-weight: 600; background: var(--bg-surface); }
.comparison-table__highlight { background: rgba(37,99,235,0.04); }

/* ---- Newsletter CTA ---- */
.newsletter { padding: var(--space-8) 0; text-align: center; background: var(--dark); color: white; }
.newsletter__title { font-size: clamp(1.25rem, 3vw, 1.75rem); font-weight: 800; margin-bottom: var(--space-3); }
.newsletter__desc { font-size: 15px; color: rgba(255,255,255,0.7); margin-bottom: var(--space-5); max-width: 500px; margin-left: auto; margin-right: auto; }
.newsletter__form { display: flex; gap: var(--space-2); max-width: 440px; margin: 0 auto; }
.newsletter__input { flex: 1; padding: 12px 18px; border: 1px solid rgba(255,255,255,0.2); border-radius: var(--radius-lg); background: rgba(255,255,255,0.1); color: white; font-size: 14px; font-family: var(--font); }
.newsletter__input::placeholder { color: rgba(255,255,255,0.4); }
.newsletter__btn { padding: 12px 24px; background: var(--primary); color: white; border: none; border-radius: var(--radius-lg); font-weight: 600; font-size: 14px; cursor: pointer; font-family: var(--font); white-space: nowrap; }

/* ---- Footer ---- */
.footer { padding: var(--space-8) 0 var(--space-6); background: var(--neutral-900); color: rgba(255,255,255,0.6); }
.footer__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--space-6); }
.footer__col h4 { color: white; font-size: 14px; font-weight: 700; margin-bottom: var(--space-3); }
.footer__col a { display: block; color: rgba(255,255,255,0.5); font-size: 14px; padding: 4px 0; }
.footer__col a:hover { color: white; }
.footer__bottom { margin-top: var(--space-7); padding-top: var(--space-5); border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: 13px; }

/* ---- Features Grid ---- */
.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--space-3); margin: var(--space-5) 0; }
.feature-item { display: flex; align-items: center; gap: var(--space-2); padding: var(--space-3); background: var(--bg-surface); border-radius: var(--radius-md); font-size: 14px; }
.feature-item__icon { width: 20px; text-align: center; flex-shrink: 0; }
.feature-item--yes .feature-item__icon { color: var(--accent); }
.feature-item--no .feature-item__icon { color: var(--text-muted); }

/* ---- Dark Mode Toggle ---- */
.theme-toggle { background: none; border: 1px solid var(--border); border-radius: var(--radius-pill); padding: 6px 10px; cursor: pointer; color: var(--text-secondary); font-size: 16px; }

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .hero__stats { gap: var(--space-5); }
  .hero__stat-number { font-size: 22px; }
  .tool-grid { grid-template-columns: 1fr; }
  .categories { grid-template-columns: 1fr 1fr; }
  .pros-cons { grid-template-columns: 1fr; }
  .tool-hero__inner { flex-direction: column; align-items: center; text-align: center; }
  .tool-hero__badges { justify-content: center; }
  .nav__links { display: none; }
  .newsletter__form { flex-direction: column; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .categories { grid-template-columns: 1fr; }
  .hero__stats { flex-direction: column; gap: var(--space-3); }
  .footer__grid { grid-template-columns: 1fr; }
}