/* ================================================================
   HYDROCALC — Design System CSS
   Dimensionnement eaux pluviales
   Police : DM Sans (Google Fonts)
   Palette : Blanc / Bleu / Vert
   Mobile-first — 375px base
   ================================================================ */

/* ── CSS Variables ── */
:root {
  /* Fonds */
  --color-bg:              #ffffff;
  --color-bg-subtle:       #f8fafc;
  --color-bg-muted:        #f1f5f9;

  /* Texte — tout lisible, zero fade */
  --color-text-primary:    #0f172a;
  --color-text-secondary:  #374151;
  --color-text-on-primary: #ffffff;
  --color-text-on-dark:    #f1f5f9;

  /* Primaire — bleu */
  --color-primary:         #2563eb;
  --color-primary-hover:   #1d4ed8;
  --color-primary-subtle:  #eff6ff;
  --color-primary-ring:    rgba(37, 99, 235, 0.25);

  /* Succes — vert */
  --color-success:         #16a34a;
  --color-success-hover:   #15803d;
  --color-success-subtle:  #f0fdf4;
  --color-success-ring:    rgba(22, 163, 74, 0.25);

  /* Accent — bleu clair */
  --color-accent:          #0ea5e9;
  --color-accent-hover:    #0284c7;
  --color-accent-subtle:   #f0f9ff;

  /* Semantique */
  --color-warning:         #d97706;
  --color-warning-subtle:  #fffbeb;
  --color-error:           #dc2626;
  --color-error-subtle:    #fef2f2;

  /* Bordures */
  --color-border:          #e2e8f0;
  --color-border-strong:   #cbd5e1;
  --color-border-input:    #d1d5db;

  /* Spacing */
  --space-1:   0.25rem;
  --space-2:   0.5rem;
  --space-3:   0.75rem;
  --space-4:   1rem;
  --space-5:   1.25rem;
  --space-6:   1.5rem;
  --space-8:   2rem;
  --space-10:  2.5rem;
  --space-12:  3rem;
  --space-16:  4rem;
  --space-20:  5rem;
  --space-section: 4rem;

  /* Border radius */
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-2xl:  1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md:  0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg:  0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl:  0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  /* Typography */
  --font-main: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', 'Fira Code', monospace;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-slow: 0.3s ease;

  /* Safe areas PWA */
  --sat: env(safe-area-inset-top,    0px);
  --sab: env(safe-area-inset-bottom, 0px);
  --sal: env(safe-area-inset-left,   0px);
  --sar: env(safe-area-inset-right,  0px);
}

/* ── Dark mode ── */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:              #0c1222;
    --color-bg-subtle:       #111827;
    --color-bg-muted:        #1e293b;

    --color-text-primary:    #f1f5f9;
    --color-text-secondary:  #cbd5e1;
    --color-text-on-primary: #ffffff;
    --color-text-on-dark:    #f1f5f9;

    --color-primary:         #3b82f6;
    --color-primary-hover:   #60a5fa;
    --color-primary-subtle:  #172554;
    --color-primary-ring:    rgba(59, 130, 246, 0.3);

    --color-success:         #22c55e;
    --color-success-hover:   #4ade80;
    --color-success-subtle:  #052e16;
    --color-success-ring:    rgba(34, 197, 94, 0.3);

    --color-accent:          #38bdf8;
    --color-accent-hover:    #7dd3fc;
    --color-accent-subtle:   #0c4a6e;

    --color-warning:         #fbbf24;
    --color-warning-subtle:  #451a03;
    --color-error:           #f87171;
    --color-error-subtle:    #450a0a;

    --color-border:          #1e293b;
    --color-border-strong:   #334155;
    --color-border-input:    #475569;

    --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md:  0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg:  0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl:  0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  }
}

/* ── Reset & Base ── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.625;
  color: var(--color-text-primary);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-top:    var(--sat);
  padding-bottom: var(--sab);
  padding-left:   var(--sal);
  padding-right:  var(--sar);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--color-primary-hover);
}
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-main);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.75rem);
}
h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}
h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}
h4 {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
}

p, li {
  font-size: 1rem;
  line-height: 1.625;
  color: var(--color-text-secondary);
}

.text-sm {
  font-size: 0.875rem;
  line-height: 1.5;
}

.text-xs {
  font-size: 0.8125rem;
  line-height: 1.4;
}

.text-lg {
  font-size: 1.125rem;
  line-height: 1.6;
}

.text-label {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-primary);
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

@media (min-width: 640px) {
  .container { padding: 0 var(--space-6); }
}
@media (min-width: 1024px) {
  .container { padding: 0 var(--space-8); }
}

/* ── Grid ── */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* ================================================================
   1. HEADER / NAVBAR
   ================================================================ */
.navbar {
  position: sticky;
  top: var(--sat);
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  height: 64px;
  display: flex;
  align-items: center;
}

@media (prefers-color-scheme: dark) {
  .navbar {
    background: rgba(12, 18, 34, 0.88);
  }
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text-primary);
  text-decoration: none;
}
.navbar-brand:hover {
  color: var(--color-primary);
}

.navbar-brand .brand-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.navbar-brand .brand-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-success);
  margin-left: var(--space-1);
}

.navbar-nav {
  display: none;
  list-style: none;
  gap: var(--space-6);
  align-items: center;
}
.navbar-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  min-height: 44px;
  display: flex;
  align-items: center;
}
.navbar-nav a:hover {
  color: var(--color-primary);
}
.navbar-nav a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Hamburger mobile */
.navbar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--color-text-primary);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}
.navbar-toggle:hover {
  background: var(--color-bg-muted);
}
.navbar-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.navbar-toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile menu overlay */
.navbar-mobile-menu {
  display: none;
  position: fixed;
  inset: 64px 0 0 0;
  background: var(--color-bg);
  z-index: 99;
  padding: var(--space-6) 20px;
  overflow-y: auto;
}
.navbar-mobile-menu.is-open {
  display: block;
  animation: fadeInDown 0.2s ease;
}
.navbar-mobile-menu a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border);
  min-height: 52px;
}
.navbar-mobile-menu a:hover {
  color: var(--color-primary);
}

@media (min-width: 768px) {
  .navbar-nav { display: flex; }
  .navbar-toggle { display: none; }
  .navbar-mobile-menu { display: none !important; }
}

/* ================================================================
   2. HERO SECTION
   ================================================================ */
.hero {
  padding: var(--space-16) 0 var(--space-12);
  background: var(--color-bg);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    var(--color-primary-subtle) 0%,
    transparent 70%
  );
  pointer-events: none;
  opacity: 0.6;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--space-6);
}
.hero-badge svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.hero h1 {
  margin-bottom: var(--space-6);
}

.hero h1 .text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.hero-stats {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}
.hero-stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1;
  margin-bottom: var(--space-1);
}
.hero-stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

@media (min-width: 640px) {
  .hero {
    padding: var(--space-20) 0 var(--space-16);
  }
  .hero-actions {
    flex-direction: row;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: 6rem 0 var(--space-20);
  }
}

/* ================================================================
   3. FEATURES SECTION (3 colonnes)
   ================================================================ */
.section {
  padding: var(--space-section) 0;
}

.section-subtle {
  background: var(--color-bg-subtle);
}

.section-muted {
  background: var(--color-bg-muted);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-12);
}

.section-header .text-label {
  margin-bottom: var(--space-3);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
}

/* Feature card */
.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  text-align: center;
}
.feature-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
}
.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-icon--blue {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
}
.feature-icon--green {
  background: var(--color-success-subtle);
  color: var(--color-success);
}
.feature-icon--cyan {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
}

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

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

/* ================================================================
   4. FORMULAIRE DE CALCUL
   ================================================================ */
.calc-form {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
}

@media (min-width: 640px) {
  .calc-form {
    padding: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .calc-form {
    padding: var(--space-10);
  }
}

.calc-form-header {
  margin-bottom: var(--space-8);
}
.calc-form-header h2 {
  margin-bottom: var(--space-2);
}
.calc-form-header p {
  color: var(--color-text-secondary);
}

/* Form group */
.form-group {
  margin-bottom: var(--space-6);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .form-row--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Label */
.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.form-label .form-hint {
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-left: var(--space-1);
}

/* Input */
.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-main);
  font-size: 1rem;
  color: var(--color-text-primary);
  background: var(--color-bg);
  border: 1px solid var(--color-border-input);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-secondary);
  opacity: 0.6;
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--color-border-strong);
}

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

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

/* Input with unit suffix */
.input-group {
  position: relative;
}
.input-group .form-input {
  padding-right: 56px;
}
.input-group .input-suffix {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  pointer-events: none;
}

/* Select dropdown arrow */
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23374151' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 44px;
  cursor: pointer;
}

@media (prefers-color-scheme: dark) {
  .form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23cbd5e1' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  }
}

/* Textarea */
.form-textarea {
  min-height: 100px;
  resize: vertical;
}

/* Validation states */
.form-input--error,
.form-select--error {
  border-color: var(--color-error);
}
.form-input--error:focus,
.form-select--error:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
}

.form-input--success,
.form-select--success {
  border-color: var(--color-success);
}
.form-input--success:focus,
.form-select--success:focus {
  box-shadow: 0 0 0 3px var(--color-success-ring);
}

.form-error {
  font-size: 0.8125rem;
  color: var(--color-error);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.form-error svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* Slider / Range */
.form-range-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-range-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.form-range-value {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-subtle);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.form-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--color-bg-muted);
  outline: none;
  cursor: pointer;
}
.form-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.form-range::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  box-shadow: 0 0 0 4px var(--color-primary-ring);
}
.form-range::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg);
  box-shadow: var(--shadow-md);
  cursor: pointer;
}
.form-range:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 4px var(--color-primary-ring);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-height: 44px;
  padding: var(--space-2) 0;
  cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.form-check-label {
  font-size: 0.9375rem;
  color: var(--color-text-primary);
  cursor: pointer;
}

/* Form divider */
.form-divider {
  height: 1px;
  background: var(--color-border);
  border: none;
  margin: var(--space-8) 0;
}

/* ================================================================
   5. RESULT CARDS
   ================================================================ */
.results-section {
  padding: var(--space-section) 0;
}

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

@media (min-width: 640px) {
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .results-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.result-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.result-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.result-card--blue::before {
  background: var(--color-primary);
}
.result-card--green::before {
  background: var(--color-success);
}
.result-card--cyan::before {
  background: var(--color-accent);
}

.result-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-lg);
}

.result-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}
.result-card-icon svg {
  width: 22px;
  height: 22px;
}

.result-card-icon--blue {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
}
.result-card-icon--green {
  background: var(--color-success-subtle);
  color: var(--color-success);
}
.result-card-icon--cyan {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
}

.result-value {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.result-unit {
  font-size: 1rem;
  font-weight: 500;
  opacity: 0.7;
}

.result-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.result-detail {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

/* Result summary card (large) */
.result-summary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  border: none;
}

@media (min-width: 640px) {
  .result-summary {
    padding: var(--space-10) var(--space-8);
  }
}

.result-summary h3 {
  color: var(--color-text-on-primary);
  margin-bottom: var(--space-4);
}
.result-summary .result-value {
  color: var(--color-text-on-primary);
  font-size: clamp(2.5rem, 6vw, 4rem);
}
.result-summary .result-label {
  color: rgba(255, 255, 255, 0.85);
}

/* ================================================================
   6. TABLEAU DE DIMENSIONNEMENT
   ================================================================ */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  min-width: 600px;
}

.data-table thead {
  background: var(--color-bg-subtle);
  border-bottom: 1px solid var(--color-border);
}

.data-table th {
  text-align: left;
  padding: var(--space-4) var(--space-5);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.data-table td {
  padding: var(--space-4) var(--space-5);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table tbody tr:hover {
  background: var(--color-bg-subtle);
}

.data-table .cell-value {
  font-weight: 600;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}

.data-table .cell-badge {
  display: inline-flex;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}
.data-table .cell-badge--recommended {
  background: var(--color-success-subtle);
  color: var(--color-success);
}
.data-table .cell-badge--viable {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
}
.data-table .cell-badge--limited {
  background: var(--color-warning-subtle);
  color: var(--color-warning);
}

/* Responsive table hint on mobile */
.table-hint {
  display: block;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  padding: var(--space-3);
}

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

/* ================================================================
   7. BOUTONS
   ================================================================ */

/* Primary — blue */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-radius: var(--radius-lg);
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.9375rem;
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast), transform 0.1s ease, box-shadow var(--transition-fast);
  min-height: 48px;
  text-decoration: none;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--color-primary-ring);
  color: var(--color-text-on-primary);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-primary svg {
  width: 18px;
  height: 18px;
}

/* Secondary — outline */
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-bg);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
  min-height: 48px;
  text-decoration: none;
}
.btn-secondary:hover {
  background: var(--color-bg-subtle);
  border-color: var(--color-border-strong);
  color: var(--color-text-primary);
}
.btn-secondary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn-secondary svg {
  width: 18px;
  height: 18px;
}

/* Success — green */
.btn-success {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-success);
  color: var(--color-text-on-primary);
  border-radius: var(--radius-lg);
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.9375rem;
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast), transform 0.1s ease, box-shadow var(--transition-fast);
  min-height: 48px;
  text-decoration: none;
}
.btn-success:hover {
  background: var(--color-success-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--color-success-ring);
  color: var(--color-text-on-primary);
}
.btn-success:active {
  transform: translateY(0);
}
.btn-success:focus-visible {
  outline: 2px solid var(--color-success);
  outline-offset: 2px;
}
.btn-success:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.btn-success svg {
  width: 18px;
  height: 18px;
}

/* Ghost button */
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-main);
  font-weight: 500;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  min-height: 48px;
  text-decoration: none;
}
.btn-ghost:hover {
  background: var(--color-bg-muted);
  color: var(--color-text-primary);
}
.btn-ghost:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn-ghost svg {
  width: 18px;
  height: 18px;
}

/* Button sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.8125rem;
  min-height: 36px;
}
.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1rem;
  min-height: 52px;
}

/* Full-width on mobile — mobile-first : pleine largeur par defaut, auto au-dessus */
.btn-full-mobile {
  width: 100%;
}
@media (min-width: 640px) {
  .btn-full-mobile {
    width: auto;
  }
}

/* Icon-only button */
.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.btn-icon:hover {
  background: var(--color-bg-subtle);
  color: var(--color-text-primary);
  border-color: var(--color-border-strong);
}
.btn-icon:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn-icon svg {
  width: 20px;
  height: 20px;
}

/* ================================================================
   8. FOOTER
   ================================================================ */
.footer {
  background: var(--color-bg-subtle);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}
.footer-brand svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.footer-description {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: 320px;
}

.footer-heading {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}
.footer-links a:hover {
  color: var(--color-primary);
}
.footer-links a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  text-align: center;
}
.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ================================================================
   9. COMMENT CA MARCHE — 3 etapes
   ================================================================ */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  counter-reset: step-counter;
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
}

.step-card {
  position: relative;
  counter-increment: step-counter;
  text-align: center;
  padding: var(--space-6);
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  font-weight: 700;
  font-size: 1.25rem;
  margin: 0 auto var(--space-5);
}

.step-card h3 {
  margin-bottom: var(--space-3);
}

.step-card p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

/* Connector line between steps (desktop) */
@media (min-width: 768px) {
  .step-card:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 32px;
    right: -12%;
    width: 24%;
    height: 2px;
    background: var(--color-border);
  }
}

/* ================================================================
   10. MODAL (Google Sign-In)
   ================================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}
.modal-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-bg);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 420px;
  padding: var(--space-8);
  transform: translateY(16px) scale(0.97);
  transition: transform var(--transition-slow);
  position: relative;
}
.modal-overlay.is-visible .modal {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.modal-close:hover {
  background: var(--color-bg-muted);
  color: var(--color-text-primary);
}
.modal-close:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.modal-close svg {
  width: 20px;
  height: 20px;
}

.modal-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.modal-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xl);
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
}
.modal-icon svg {
  width: 28px;
  height: 28px;
}

.modal-header h3 {
  margin-bottom: var(--space-2);
}
.modal-header p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

/* Google sign-in button */
.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  width: 100%;
  min-height: 52px;
  padding: var(--space-3) var(--space-6);
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  font-family: var(--font-main);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}
.btn-google:hover {
  background: var(--color-bg-subtle);
  box-shadow: var(--shadow-md);
}
.btn-google:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn-google svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.modal-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-6) 0;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
}
.modal-divider::before,
.modal-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.modal-footer {
  text-align: center;
  margin-top: var(--space-6);
}
.modal-footer p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}
.modal-footer a {
  font-weight: 500;
}

/* ================================================================
   11. ZONE EXPORT PDF
   ================================================================ */
.export-section {
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
}

@media (min-width: 640px) {
  .export-section {
    padding: var(--space-8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
  }
}

.export-content {
  margin-bottom: var(--space-6);
}

@media (min-width: 640px) {
  .export-content {
    margin-bottom: 0;
  }
}

.export-content h3 {
  margin-bottom: var(--space-2);
}
.export-content p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.export-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

@media (min-width: 480px) {
  .export-actions {
    flex-direction: row;
  }
}

/* ================================================================
   UTILITY CLASSES
   ================================================================ */

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

/* Text alignment */
.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

/* Spacing helpers */
.mt-4  { margin-top: var(--space-4); }
.mt-6  { margin-top: var(--space-6); }
.mt-8  { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-4  { margin-bottom: var(--space-4); }
.mb-6  { margin-bottom: var(--space-6); }
.mb-8  { margin-bottom: var(--space-8); }

/* Flex helpers */
.flex        { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* Badge / Tag */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}
.badge--blue {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
}
.badge--green {
  background: var(--color-success-subtle);
  color: var(--color-success);
}
.badge--cyan {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
}

/* Alert / Notice */
.alert {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid;
  font-size: 0.9375rem;
}
.alert svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}
.alert--info {
  background: var(--color-primary-subtle);
  border-color: var(--color-primary);
  color: var(--color-text-primary);
}
.alert--info svg {
  color: var(--color-primary);
}
.alert--success {
  background: var(--color-success-subtle);
  border-color: var(--color-success);
  color: var(--color-text-primary);
}
.alert--success svg {
  color: var(--color-success);
}
.alert--warning {
  background: var(--color-warning-subtle);
  border-color: var(--color-warning);
  color: var(--color-text-primary);
}
.alert--warning svg {
  color: var(--color-warning);
}
.alert--error {
  background: var(--color-error-subtle);
  border-color: var(--color-error);
  color: var(--color-text-primary);
}
.alert--error svg {
  color: var(--color-error);
}

/* Tooltip */
.tooltip {
  position: relative;
  display: inline-flex;
}
.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-3);
  background: var(--color-text-primary);
  color: var(--color-bg);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: 50;
}
.tooltip:hover::after,
.tooltip:focus-visible::after {
  opacity: 1;
}

/* Divider */
.divider {
  height: 1px;
  background: var(--color-border);
  border: none;
  margin: var(--space-8) 0;
}

/* Loading spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Progress bar */
.progress {
  width: 100%;
  height: 8px;
  background: var(--color-bg-muted);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}
.progress-bar--blue {
  background: var(--color-primary);
}
.progress-bar--green {
  background: var(--color-success);
}

/* ================================================================
   ANIMATIONS
   ================================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.animate-in {
  opacity: 0;
  animation: fadeInUp 0.5s ease forwards;
}
.animate-in:nth-child(2) { animation-delay: 0.1s; }
.animate-in:nth-child(3) { animation-delay: 0.2s; }
.animate-in:nth-child(4) { animation-delay: 0.3s; }
.animate-in:nth-child(5) { animation-delay: 0.4s; }
.animate-in:nth-child(6) { animation-delay: 0.5s; }

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

/* ================================================================
   TABS (for calc sections)
   ================================================================ */
.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  min-height: 48px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.tab:hover {
  color: var(--color-text-primary);
}
.tab:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}
.tab.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}
.tab svg {
  width: 18px;
  height: 18px;
}

.tab-panel {
  display: none;
  padding: var(--space-6) 0;
}
.tab-panel.is-active {
  display: block;
  animation: fadeIn 0.2s ease;
}

/* ================================================================
   CARD generic
   ================================================================ */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.card-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* ================================================================
   SKELETON / Loading states
   ================================================================ */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-muted) 25%,
    var(--color-bg-subtle) 50%,
    var(--color-bg-muted) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 16px;
  margin-bottom: var(--space-2);
}
.skeleton-text:last-child {
  width: 70%;
}

.skeleton-heading {
  height: 28px;
  width: 50%;
  margin-bottom: var(--space-4);
}

.skeleton-value {
  height: 40px;
  width: 60%;
  margin-bottom: var(--space-2);
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ================================================================
   PWA UPDATE TOAST
   ================================================================ */
.pwa-update-toast {
  position: fixed;
  bottom: var(--space-4);
  left: var(--space-4);
  right: var(--space-4);
  bottom: calc(var(--sab) + var(--space-4));
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-xl);
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  box-shadow: var(--shadow-xl);
  z-index: 9999;
  animation: fadeInUp 0.3s ease;
}
.pwa-update-toast span {
  flex: 1;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
}
.pwa-update-toast button {
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.8125rem;
}
.pwa-update-toast button:first-of-type {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}
.pwa-update-toast button:first-of-type:hover {
  background: var(--color-primary-hover);
}
.pwa-update-toast button:last-of-type {
  background: var(--color-bg-muted);
  color: var(--color-text-secondary);
}
.pwa-update-toast button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

@media (min-width: 640px) {
  .pwa-update-toast {
    left: auto;
    right: var(--space-6);
    bottom: calc(var(--sab) + var(--space-6));
    max-width: 420px;
    flex-wrap: nowrap;
  }
}

/* ================================================================
   PRINT
   ================================================================ */
@media print {
  .navbar,
  .footer,
  .hero,
  .btn-primary,
  .btn-secondary,
  .btn-success,
  .btn-ghost,
  .modal-overlay,
  .pwa-update-toast,
  .export-section {
    display: none !important;
  }
  body {
    color: var(--color-text-primary);
    background: var(--color-bg);
  }
  .result-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid var(--color-border-strong);
  }
}