/* ==========================================================================
   STAHLWANDPOOL – REDESIGNED DESIGN SYSTEM
   "RECHTWINKLIG" – Sharp, architectural, editorial
   ========================================================================== */

:root {
  /* Color – sophisticated, architectural */
  --bg: #FAF9F6;
  --bg-alt: #F0EDE8;
  --surface: #FFFFFF;
  --surface-elevated: #FFFFFF;
  --primary: #0D1B2A;        /* Deep charcoal */
  --primary-hover: #1A2D42;
  --accent: #B8860B;         /* Dark gold */
  --accent-hover: #9A7009;
  --accent-light: #F5E6C8;   /* For subtle backgrounds */
  --border: #E8E4DC;         /* Fugen lines */
  --border-strong: #D4CCC0;
  --text: #1A1A2E;
  --text-secondary: #4A4A6A;
  --text-muted: #8A8A9A;
  --text-inverse: #FAF9F6;
  --focus: #0D1B2A;
  --error: #8B2E2E;

  /* Typography */
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Spacing scale (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* Type scale */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 2rem;      /* 32px */
  --text-4xl: 2.5rem;    /* 40px */
  --text-5xl: 3.5rem;    /* 56px */
  --text-6xl: 5rem;      /* 80px */

  /* Layout */
  --container-max: 1280px;
  --header-height: 72px;
  --header-height-sm: 64px;
  --fugen-width: 2px;
  --radius: 0;             /* Zero rounded corners */

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 350ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(13,27,42,0.04);
  --shadow-md: 0 4px 12px rgba(13,27,42,0.06);
  --shadow-lg: 0 12px 32px rgba(13,27,42,0.08);
  --shadow-xl: 0 20px 48px rgba(13,27,42,0.1);
}

/* Dark mode not required per brief, but variables ready */

/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Selection */
::selection { background: var(--primary); color: var(--text-inverse); }
::-moz-selection { background: var(--primary); color: var(--text-inverse); }

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

:focus:not(:focus-visible) { outline: none; }

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.15;
  color: var(--primary);
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 { font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl)); }
h2 { font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl)); }
h3 { font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl)); }
h4 { font-size: clamp(var(--text-xl), 2.5vw, var(--text-3xl)); }

p { margin-bottom: var(--space-4); max-width: 65ch; }

.lead {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--text-secondary);
  font-weight: 400;
}

.small { font-size: var(--text-sm); color: var(--text-muted); }
.micro { font-size: var(--text-xs); color: var(--text-muted); }

/* Label style – uppercase, tracked, gold */
.label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

a:hover { color: var(--accent); border-bottom-color: var(--accent); }
a:focus-visible { border-bottom-color: transparent; }

/* ==========================================================================
   LAYOUT UTILITIES
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 768px) { .container { padding: 0 var(--space-8); } }
@media (min-width: 1280px) { .container { padding: 0 var(--space-10); } }

/* Section spacing */
section { padding: var(--space-16) 0; }
@media (min-width: 768px) { section { padding: var(--space-20) 0; } }
@media (min-width: 1024px) { section { padding: var(--space-24) 0; } }

/* Section header */
.section-header { margin-bottom: var(--space-10); }
@media (min-width: 768px) { .section-header { margin-bottom: var(--space-12); } }

.section-header h2 { margin-bottom: var(--space-3); }
.section-header .lead { margin-bottom: 0; max-width: 55ch; }

/* Divider line */
.divider {
  width: 60px;
  height: 2px;
  background: var(--primary);
  margin: var(--space-4) 0 var(--space-6);
}

/* ==========================================================================
   GRID SYSTEM – "FUGEN" GRID
   ========================================================================== */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--fugen-width);
  background: var(--border);
  width: 100%;
}

.grid > * { background: var(--surface); }

@media (max-width: 767px) {
  .grid { grid-template-columns: 1fr; gap: var(--space-4); background: transparent; }
  .grid > * { border: 1px solid var(--border); }
}

/* Column spans */
.col-1 { grid-column: span 1; } .col-2 { grid-column: span 2; } .col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; } .col-5 { grid-column: span 5; } .col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; } .col-8 { grid-column: span 8; } .col-9 { grid-column: span 9; }
.col-10 { grid-column: span 10; } .col-11 { grid-column: span 11; } .col-12 { grid-column: span 12; }

@media (min-width: 768px) {
  .md\:col-1 { grid-column: span 1; } .md\:col-2 { grid-column: span 2; } .md\:col-3 { grid-column: span 3; }
  .md\:col-4 { grid-column: span 4; } .md\:col-5 { grid-column: span 5; } .md\:col-6 { grid-column: span 6; }
  .md\:col-7 { grid-column: span 7; } .md\:col-8 { grid-column: span 8; } .md\:col-9 { grid-column: span 9; }
  .md\:col-10 { grid-column: span 10; } .md\:col-11 { grid-column: span 11; } .md\:col-12 { grid-column: span 12; }
}

@media (min-width: 1024px) {
  .lg\:col-1 { grid-column: span 1; } .lg\:col-2 { grid-column: span 2; } .lg\:col-3 { grid-column: span 3; }
  .lg\:col-4 { grid-column: span 4; } .lg\:col-5 { grid-column: span 5; } .lg\:col-6 { grid-column: span 6; }
  .lg\:col-7 { grid-column: span 7; } .lg\:col-8 { grid-column: span 8; } .lg\:col-9 { grid-column: span 9; }
  .lg\:col-10 { grid-column: span 10; } .lg\:col-11 { grid-column: span 11; } .lg\:col-12 { grid-column: span 12; }
}

/* ==========================================================================
   TILE COMPONENT
   ========================================================================== */
.tile {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: var(--space-6);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

@media (min-width: 768px) { .tile { padding: var(--space-8); } }

.tile:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.tile:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--surface), 0 0 0 5px var(--primary);
}

/* Tile with link fill effect */
.tile-link {
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.tile-link::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
  z-index: -1;
}

.tile-link:hover::before,
.tile-link:focus-visible::before {
  transform: scaleX(1);
}

.tile-link:hover,
.tile-link:focus-visible {
  color: var(--text-inverse);
  border-bottom-color: transparent;
}

.tile-link:hover svg,
.tile-link:focus-visible svg { stroke: var(--text-inverse); }

/* Tile variants */
.tile--bordered { border-width: 2px; }
.tile--accent-border { border-color: var(--accent); }
.tile--accent-border:hover { border-color: var(--accent-hover); box-shadow: 0 8px 24px rgba(184,134,11,0.15); }

/* ==========================================================================
   REVEAL ANIMATIONS
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Stagger delays */
.reveal-1 { transition-delay: 0ms; }
.reveal-2 { transition-delay: 60ms; }
.reveal-3 { transition-delay: 120ms; }
.reveal-4 { transition-delay: 180ms; }
.reveal-5 { transition-delay: 240ms; }
.reveal-6 { transition-delay: 300ms; }
.reveal-7 { transition-delay: 360ms; }
.reveal-8 { transition-delay: 420ms; }
.reveal-9 { transition-delay: 480ms; }
.reveal-10 { transition-delay: 540ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: var(--space-4) var(--space-7);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

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

.btn--primary {
  background: var(--primary);
  color: var(--text-inverse);
  border-color: var(--primary);
}

.btn--primary:hover:not(:disabled) {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn--outline:hover:not(:disabled) {
  background: var(--primary);
  color: var(--text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--accent {
  background: var(--accent);
  color: var(--text-inverse);
  border-color: var(--accent);
}

.btn--accent:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(184,134,11,0.25);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
  padding: var(--space-3) var(--space-4);
}

.btn--ghost:hover:not(:disabled) {
  color: var(--primary);
  background: var(--bg-alt);
}

.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ==========================================================================
   FORM ELEMENTS
   ========================================================================== */
.field { display: grid; gap: var(--space-2); }

.field label {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text);
}

.field input[type="number"],
.field input[type="text"],
.field select,
.field textarea {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-5);
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--surface), 0 0 0 5px var(--primary);
  outline: none;
}

.field input::placeholder { color: var(--text-muted); }
.field .hint { font-size: var(--text-xs); color: var(--text-muted); }

/* ==========================================================================
   HEADER / NAVIGATION
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

@media (min-width: 768px) { .site-header { height: var(--header-height-sm); } }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-6);
}

/* Logo */
.logo {
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--primary);
  text-decoration: none;
  border-bottom: none;
  flex-shrink: 0;
}

.logo:hover { color: var(--accent); border-bottom: none; }
.logo span { color: var(--accent); }

/* Desktop nav */
.nav-desktop { display: none; gap: var(--space-8); }
@media (min-width: 768px) { .nav-desktop { display: flex; } }

.nav-desktop a {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: var(--space-2) 0;
  position: relative;
  border-bottom: none;
}

.nav-desktop a::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}

.nav-desktop a:hover { color: var(--primary); border-bottom: none; }
.nav-desktop a:hover::after { transform: scaleX(1); }
.nav-desktop a:focus-visible::after { transform: scaleX(1); }

/* Header CTA */
.header-cta { display: none; }
@media (min-width: 768px) { .header-cta { display: inline-flex; } }

/* Mobile menu button */
.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--primary);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

@media (min-width: 768px) { .menu-toggle { display: none; } }

.menu-toggle:hover { background: var(--bg-alt); border-color: var(--border-strong); }
.menu-toggle svg { width: 24px; height: 24px; }

/* Mobile menu panel */
.mobile-menu {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 99;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: var(--space-6);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition-slow), opacity var(--transition-slow), visibility var(--transition-slow);
}

.mobile-menu.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu nav { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-6); }

.mobile-menu a {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--border);
  color: var(--text);
  text-align: left;
  border-bottom: none;
}

.mobile-menu a:hover { background: var(--bg-alt); color: var(--primary); border-color: var(--border-strong); }

.mobile-menu .btn { width: 100%; justify-content: center; }

/* Overlay when mobile menu open */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 98;
  background: rgba(13,27,42,0.4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-menu-overlay.is-visible { opacity: 1; visibility: visible; }

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  position: relative;
  min-height: 90vh;
  min-height: 90dvh;
  display: grid;
  align-content: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

@media (min-width: 768px) { .hero { min-height: 100vh; min-height: 100dvh; } }

/* Background grid pattern */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-10);
}

@media (min-width: 1024px) {
  .hero-inner { grid-template-columns: 1.2fr 0.8fr; align-items: center; gap: var(--space-16); }
}

.hero-content { padding-right: var(--space-4); }
@media (min-width: 1024px) { .hero-content { padding-right: var(--space-12); } }

.hero h1 {
  font-size: clamp(var(--text-4xl), 6vw, var(--text-6xl));
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-5);
}

.hero h1 .accent-word { color: var(--accent); }

.hero .dimension-line {
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) { .hero .dimension-line { font-size: var(--text-2xl); } }

.hero .lead { margin-bottom: var(--space-8); max-width: 50ch; }

.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: center; }

/* Hero visual – SVG technical drawing */
.hero-visual { display: none; }
@media (min-width: 1024px) {
  .hero-visual { display: block; position: relative; }
  .hero-visual::before {
    content: "";
    position: absolute;
    inset: -4px;
    background: var(--border);
    z-index: -1;
  }
}

.hero-visual figure { margin: 0; }
.hero-visual svg { display: block; width: 100%; height: auto; max-height: 520px; }

/* ==========================================================================
   DIMENSION CARDS
   ========================================================================== */
.dimension-card {
  text-align: center;
  padding: var(--space-8) var(--space-6);
}

@media (min-width: 768px) { .dimension-card { padding: var(--space-10) var(--space-8); } }

.dimension-card .value {
  font-family: var(--font-sans);
  font-size: clamp(var(--text-4xl), 5vw, var(--text-5xl));
  font-weight: 700;
  line-height: 1;
  color: var(--primary);
  margin: var(--space-4) 0 var(--space-3);
}

.dimension-card .unit { font-size: var(--text-lg); font-weight: 400; color: var(--text-muted); }
.dimension-card p { margin: 0; color: var(--text-secondary); font-size: var(--text-sm); max-width: none; }

/* ==========================================================================
   CONTENT SECTIONS – Alternating backgrounds
   ========================================================================== */
section:nth-of-type(odd) { background: var(--bg); }
section:nth-of-type(even) { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ==========================================================================
   FEATURE GRID
   ========================================================================== */
.feature-card {
  padding: var(--space-6);
  text-align: left;
}

@media (min-width: 768px) { .feature-card { padding: var(--space-8); } }

.feature-card .icon {
  width: 48px;
  height: 48px;
  background: var(--accent-light);
  border: 1px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.feature-card .icon svg { width: 24px; height: 24px; stroke: var(--accent); }

.feature-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}

.feature-card p { margin: 0; font-size: var(--text-sm); color: var(--text-secondary); max-width: none; }

/* ==========================================================================
   CHECKLIST
   ========================================================================== */
.checklist { list-style: none; display: grid; gap: var(--space-4); }
.checklist li {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--surface);
  border: 1px solid var(--border);
  align-items: flex-start;
}

.checklist .bullet {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: var(--text-inverse);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.checklist strong { color: var(--primary); display: block; margin-bottom: var(--space-1); }
.checklist p { margin: 0; font-size: var(--text-sm); color: var(--text-secondary); max-width: none; }

/* ==========================================================================
   MAßRECHNER
   ========================================================================== */
.calculator-grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 1024px) { .calculator-grid { grid-template-columns: 1fr 1fr; align-items: start; } }

.calculator-input { padding: var(--space-6); }
@media (min-width: 768px) { .calculator-input { padding: var(--space-8); } }

.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.result-box {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: var(--space-5) var(--space-4);
  text-align: center;
}

.result-box .label { color: var(--text-muted); margin-bottom: var(--space-2); }
.result-box .value {
  font-family: var(--font-sans);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.calculator-visual { position: relative; }
.calculator-visual svg { width: 100%; height: auto; max-width: 480px; margin: 0 auto; display: block; }

.calculator-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4) var(--space-6);
  margin-top: var(--space-6);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.calculator-legend span { display: flex; align-items: center; gap: var(--space-2); }
.calculator-legend .swatch { width: 16px; height: 16px; border: 1px solid var(--border); }

.calculator-note {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--accent-light);
  border: 1px solid var(--accent);
  font-size: var(--text-sm);
  color: var(--primary);
}

.calculator-note strong { color: var(--primary); }

/* ==========================================================================
   ACCORDION (FAQ)
   ========================================================================== */
.accordion { display: grid; gap: var(--fugen-width); background: var(--border); }
@media (max-width: 767px) { .accordion { gap: var(--space-3); background: transparent; } }

.accordion-item {
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
}

@media (max-width: 767px) { .accordion-item { border-width: 1px; } }

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: transparent;
  border: none;
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--primary);
  text-align: left;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

@media (min-width: 768px) { .accordion-trigger { padding: var(--space-6) var(--space-8); font-size: var(--text-xl); } }

.accordion-trigger:hover { background: var(--bg-alt); color: var(--accent); }
.accordion-trigger:focus-visible { outline: none; background: var(--bg-alt); }

.accordion-trigger svg {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  stroke: var(--accent);
  transition: transform var(--transition-base);
}

.accordion-item[open] .accordion-trigger svg { transform: rotate(180deg); }
.accordion-item[open] .accordion-trigger { background: var(--bg-alt); color: var(--accent); border-bottom: 1px solid var(--border); }

.accordion-content {
  padding: 0 var(--space-6) var(--space-6);
  color: var(--text-secondary);
  line-height: 1.8;
  animation: accordion-in 0.3s ease;
}

@media (min-width: 768px) { .accordion-content { padding: 0 var(--space-8) var(--space-8); } }

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

@media (prefers-reduced-motion: reduce) { .accordion-content { animation: none; } }

.accordion-content p { margin-bottom: var(--space-3); }
.accordion-content p:last-child { margin-bottom: 0; }
.accordion-content a { font-weight: 500; }

/* ==========================================================================
   CTA SECTION
   ========================================================================== */
.cta-section {
  background: var(--primary);
  color: var(--text-inverse);
  text-align: center;
  padding: var(--space-20) 0;
}

@media (min-width: 768px) { .cta-section { padding: var(--space-24) 0; } }

.cta-section h2 { color: var(--text-inverse); margin-bottom: var(--space-4); }
.cta-section .lead { color: rgba(250,249,246,0.75); margin-bottom: var(--space-8); max-width: 55ch; margin-left: auto; margin-right: auto; }
.cta-section .btn { border-color: var(--text-inverse); }
.cta-section .btn:hover { background: var(--text-inverse); color: var(--primary); border-color: var(--text-inverse); }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: var(--space-16) 0 var(--space-10);
}

@media (min-width: 768px) { .site-footer { padding: var(--space-20) 0 var(--space-12); } }

.footer-grid {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }

.footer-brand .logo { display: inline-block; margin-bottom: var(--space-4); font-size: var(--text-2xl); }
.footer-brand p { font-size: var(--text-sm); color: var(--text-secondary); max-width: 300px; margin-bottom: 0; }

.footer-nav h4 {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-4);
}

.footer-nav ul { list-style: none; display: grid; gap: var(--space-2); }
.footer-nav a { font-size: var(--text-sm); color: var(--text-secondary); border-bottom: none; padding: var(--space-1) 0; }
.footer-nav a:hover { color: var(--primary); border-bottom: 1px solid var(--primary); }

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
  font-size: var(--text-sm);
  color: var(--text-muted);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom { flex-direction: row; justify-content: space-between; text-align: left; }
}

.footer-bottom .legal-links { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-4) var(--space-6); }
@media (min-width: 768px) { .footer-bottom .legal-links { justify-content: flex-end; } }

.footer-bottom .legal-links a { color: var(--text-muted); border-bottom: none; }
.footer-bottom .legal-links a:hover { color: var(--primary); border-bottom: 1px solid var(--primary); }

/* ==========================================================================
   SKIP LINK
   ========================================================================== */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 1000;
  padding: var(--space-3) var(--space-5);
  background: var(--primary);
  color: var(--text-inverse);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--text-sm);
  border-bottom: none;
  transition: top var(--transition-fast);
}

.skip-link:focus { top: var(--space-4); outline: 2px solid var(--accent); outline-offset: 2px; }

/* ==========================================================================
   404 PAGE
   ========================================================================== */
.error-page { min-height: 60vh; display: flex; align-items: center; justify-content: center; padding: var(--space-16) var(--space-6); }
.error-code { font-family: var(--font-sans); font-size: clamp(8rem, 25vw, 16rem); font-weight: 700; line-height: 1; color: var(--border); letter-spacing: -0.05em; }
.error-page h1 { margin-top: var(--space-6); margin-bottom: var(--space-4); }
.error-page .lead { margin-bottom: var(--space-8); }

/* ==========================================================================
   LEGAL PAGES PROSE
   ========================================================================== */
.legal-content {
  font-family: var(--font-serif);
  line-height: 1.85;
  color: var(--text);
}

.legal-content h1 { margin-bottom: var(--space-3); }
.legal-content .meta { color: var(--text-muted); margin-bottom: var(--space-10); font-size: var(--text-sm); }

.legal-content h2 {
  font-size: var(--text-2xl);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border);
}

.legal-content h3 { font-size: var(--text-xl); margin-top: var(--space-8); margin-bottom: var(--space-3); }

.legal-content p { margin-bottom: var(--space-4); }
.legal-content ul { margin: var(--space-4) 0 var(--space-4) var(--space-6); }
.legal-content li { margin-bottom: var(--space-3); }
.legal-content strong { font-weight: 600; color: var(--primary); }
.legal-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-alt);
  padding: 0.15em 0.4em;
  border: 1px solid var(--border);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--primary);
}

.back-link:hover { color: var(--accent); border-bottom-color: var(--accent); }
.back-link svg { width: 20px; height: 20px; flex-shrink: 0; }

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */
@media print {
  .site-header, .site-footer, .hero-visual, .calculator-visual, .btn, .accordion-trigger svg, .mobile-menu, .menu-toggle { display: none !important; }
  body { background: white; color: black; font-size: 11pt; line-height: 1.6; }
  .reveal { opacity: 1 !important; transform: none !important; }
  a { text-decoration: underline; color: black !important; border-bottom: none !important; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 0.8em; font-weight: normal; }
  section { page-break-inside: avoid; }
  .tile { break-inside: avoid; border: 1px solid #ccc !important; box-shadow: none !important; }
}

/* ==========================================================================
   HIGH CONTRAST MODE
   ========================================================================== */
@media (prefers-contrast: high) {
  :root {
    --border: #000;
    --border-strong: #000;
    --primary: #000;
    --accent: #000;
    --text-secondary: #000;
    --text-muted: #333;
  }
  .tile { border-width: 2px; }
  .btn { border-width: 3px; }
  :focus-visible { outline-width: 3px; }
}