/* ============================================================
   GLOBAL.CSS — Shared styles for raum-planer-online.de
   Reset · Typography · Header · Footer · Layout · Buttons · Icons
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Brand palette */
  --color-primary: #0f6b5e;
  --color-primary-dark: #0a4f46;
  --color-primary-light: #e6f5f2;
  --color-accent: #d4a24e;
  --color-accent-light: #fdf5e6;

  /* Neutrals */
  --color-bg: #ffffff;
  --color-bg-warm: #faf8f5;
  --color-bg-cool: #f0f4f3;
  --color-text: #1a1a1a;
  --color-text-secondary: #4a5568;
  --color-text-muted: #718096;
  --color-border: #e2e8f0;
  --color-border-light: #edf2f7;

  /* Typography */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --max-width: 800px;
  --max-width-wide: 1100px;
  --nav-height: 72px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* --- 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-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
details > summary { cursor: pointer; }
details > summary::-webkit-details-marker { display: none; }
details > summary::marker { content: ''; }
table { border-collapse: collapse; width: 100%; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
}
h1 { font-size: clamp(1.875rem, 4vw, 2.75rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -0.015em; }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); }
h4 { font-size: 1.0625rem; font-family: var(--font-body); font-weight: 600; }

p { margin-bottom: var(--space-md); color: var(--color-text-secondary); }
p:last-child { margin-bottom: 0; }

strong { font-weight: 600; color: var(--color-text); }
small { font-size: 0.875rem; }

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.container--wide {
  max-width: var(--max-width-wide);
}
.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}
.section-subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* --- SVG Icon Base --- */
.icon {
  display: inline-block;
  width: 1.25em;
  height: 1.25em;
  vertical-align: -0.15em;
  flex-shrink: 0;
}
.icon--sm { width: 1em; height: 1em; }
.icon--md { width: 1.5em; height: 1.5em; }
.icon--lg { width: 2em; height: 2em; }
.icon--xl { width: 2.5em; height: 2.5em; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.8125rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(15,107,94,0.25);
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(15,107,94,0.35);
  transform: translateY(-1px);
}
.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn--secondary:hover {
  background: var(--color-primary-light);
}
.btn--accent {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(212,162,78,0.3);
}
.btn--accent:hover {
  background: #c4922e;
  transform: translateY(-1px);
}
.btn--lg {
  padding: 1rem 2.25rem;
  font-size: 1rem;
}

/* --- Header / Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
}
.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}
.logo svg { width: 32px; height: 32px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}
.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}
.nav-links a:hover { color: var(--color-primary); }
.nav-cta {
  padding: 0.5rem 1.25rem;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-weight: 600 !important;
  transition: background var(--transition-fast) !important;
}
.nav-cta:hover { background: var(--color-primary-dark) !important; }

/* Mobile menu toggle */
.nav-toggle-checkbox { display: none; }
.nav-toggle-label { display: none; cursor: pointer; }

@media (max-width: 768px) {
  .nav-toggle-label {
    display: flex;
    align-items: center;
    color: var(--color-text);
  }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg);
    padding: var(--space-xl) var(--space-lg);
    gap: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform var(--transition-base), opacity var(--transition-base);
  }
  .nav-toggle-checkbox:checked ~ .nav-links {
    transform: translateY(0);
    opacity: 1;
  }
}

/* --- Footer --- */
.site-footer {
  background: #0e1a18;
  color: #c0ccc9;
  padding: var(--space-4xl) 0 var(--space-xl);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-2xl);
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-md);
}
.footer-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #8a9e9a;
  margin-bottom: 0;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-sm); }
.footer-col a {
  font-size: 0.875rem;
  color: #8a9e9a;
  transition: color var(--transition-fast);
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  max-width: var(--max-width-wide);
  margin: var(--space-2xl) auto 0;
  padding: var(--space-lg) var(--space-lg) 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8125rem;
  color: #5a6e6a;
}
@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
  .footer-brand-col { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: var(--space-sm); text-align: center; }
}

/* --- FAQ / Accordion Base --- */
.faq-item {
  border-bottom: 1px solid var(--color-border);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
}
.faq-item summary .icon-chevron {
  transition: transform var(--transition-base);
  flex-shrink: 0;
  margin-left: var(--space-md);
  color: var(--color-text-muted);
}
.faq-item[open] summary .icon-chevron {
  transform: rotate(180deg);
}
.faq-answer {
  padding: 0 0 var(--space-lg) 0;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Table Base --- */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.table-wrap table { min-width: 600px; }
.table-wrap th {
  background: var(--color-bg-cool);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  position: sticky;
  top: 0;
}
.table-wrap td {
  padding: var(--space-md) var(--space-lg);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border-light);
}
.table-wrap tr:nth-child(even) td { background: var(--color-bg-warm); }

/* --- Visually Hidden (a11y) --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}