/* Mobilia Tools — single stylesheet for every page.
   Design tokens up top; change them here and the whole site follows. */

:root {
  --color-primary: #1a73e8;
  --color-primary-dark: #1557b0;
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-text: #1c1e21;
  --color-text-2: #5f6368;
  --color-border: #e0e3e8;
  --color-accent-bg: #e8f0fe;
  --color-success: #188038;
  --color-error: #d93025;
  --radius: 12px;
  --radius-sm: 8px;
  --space-1: 6px;
  --space-2: 12px;
  --space-3: 20px;
  --space-4: 32px;
  --space-5: 52px;
  --shadow: 0 1px 3px rgba(20, 24, 33, 0.08), 0 4px 14px rgba(20, 24, 33, 0.05);
  --max-width: 760px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #8ab4f8;
    --color-primary-dark: #aecbfa;
    --color-bg: #131417;
    --color-surface: #1d1f24;
    --color-text: #e8eaed;
    --color-text-2: #9aa0a6;
    --color-border: #34373e;
    --color-accent-bg: #1c2b41;
    --color-success: #81c995;
    --color-error: #f28b82;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-3); }

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 1.7rem; line-height: 1.25; margin: var(--space-3) 0 var(--space-2); }
h2 { font-size: 1.2rem; margin: var(--space-4) 0 var(--space-2); }

.intro { color: var(--color-text-2); margin: 0 0 var(--space-3); }

/* ------------------------------------------------------------- header/footer */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.header-row {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 56px;
}
.logo { font-weight: 700; font-size: 1.05rem; color: var(--color-text); }
.logo:hover { text-decoration: none; color: var(--color-primary); }
.site-nav { display: flex; gap: var(--space-3); }
.site-nav a { color: var(--color-text-2); font-size: 0.95rem; }
.site-nav a:hover { color: var(--color-primary); text-decoration: none; }

.site-footer {
  margin-top: var(--space-5);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-2);
  font-size: 0.88rem;
  text-align: center;
}
.site-footer .footnote { opacity: 0.75; margin-top: var(--space-1); }

.breadcrumb {
  font-size: 0.85rem; color: var(--color-text-2);
  margin-top: var(--space-3);
}
.breadcrumb span { color: var(--color-text-2); }

/* --------------------------------------------------------------- calculator */

.calc-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-3);
  margin: var(--space-3) 0;
}

.field { margin-bottom: var(--space-2); }
.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-2);
  margin-bottom: 4px;
}
.field input, .field select, .field textarea {
  width: 100%;
  padding: 10px 12px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--color-primary);
}

.field-row { display: flex; gap: var(--space-2); }
.field-row .field { flex: 1; min-width: 0; }

.result {
  display: none;
  margin-top: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-accent-bg);
  border-radius: var(--radius-sm);
  font-size: 1.02rem;
  overflow-wrap: break-word;
}
.result.visible { display: block; }
.result .big { font-size: 1.35rem; font-weight: 700; }
.result .ok { color: var(--color-success); font-weight: 700; }
.result .bad { color: var(--color-error); font-weight: 700; }
.result table { width: 100%; border-collapse: collapse; margin-top: var(--space-1); }
.result td { padding: 4px 0; border-bottom: 1px solid var(--color-border); }
.result td:last-child { text-align: right; font-weight: 600; }
.result tr:last-child td { border-bottom: none; }

/* ------------------------------------------------------------------ content */

.content-section { margin-top: var(--space-4); }
.content-section code {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.9em;
}
.content-section table {
  width: 100%; border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
}
.content-section th, .content-section td {
  text-align: left; padding: 8px 12px;
  border-bottom: 1px solid var(--color-border);
}
.content-section tr:last-child td { border-bottom: none; }

/* ---------------------------------------------------------------------- CTA */

.cta-card {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-3); flex-wrap: wrap;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius);
  padding: var(--space-3);
  margin-top: var(--space-4);
}
.cta-card h2 { margin: 0 0 4px; font-size: 1.05rem; }
.cta-card p { margin: 0; color: var(--color-text-2); font-size: 0.92rem; }

.play-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: #000; color: #fff;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}
.play-badge:hover { text-decoration: none; opacity: 0.88; }
.play-badge small { display: block; font-size: 0.62rem; letter-spacing: 0.06em; opacity: 0.85; }
.play-badge span { line-height: 1.15; font-weight: 600; }

/* ---------------------------------------------------------------- ad slots */

.ad-slot {
  margin: var(--space-4) 0;
  min-height: 90px;
  text-align: center;
}

/* ----------------------------------------------------------------- FAQ/grid */

.faq details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-2);
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq p { margin: var(--space-2) 0 var(--space-1); color: var(--color-text-2); }

.tool-grid {
  list-style: none; padding: 0; margin: var(--space-2) 0 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2);
}
.hub-grid { margin-top: var(--space-3); }
.tool-card {
  display: flex; gap: var(--space-2); align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  height: 100%;
  color: var(--color-text);
}
.tool-card:hover { border-color: var(--color-primary); text-decoration: none; }
.tool-card strong { display: block; font-size: 0.98rem; }
.tool-card small { color: var(--color-text-2); font-size: 0.82rem; line-height: 1.4; display: block; margin-top: 2px; }
.tool-card-icon { font-size: 1.4rem; line-height: 1.3; }

@media (max-width: 560px) {
  .tool-grid { grid-template-columns: 1fr; }
  .field-row { flex-direction: column; gap: 0; }
  h1 { font-size: 1.45rem; }
}