/* =========================================================================
   Dive Tools — shared portal styles
   Design tokens match the CCR calculator so the portal and individual
   apps feel like one product family.
   ========================================================================= */

:root {
  /* Palette (mirrors ccr-calculator/index.html) */
  --blue-dark:   #1f3864;
  --blue-mid:    #2e75b6;
  --blue-light:  #ddebf7;
  --cream:       #fff8e1;
  --green-light: #e2efda;
  --green-dark:  #c6e0b4;
  --red:         #c00000;
  --text:        #1a1a1a;
  --muted:       #666;
  --border:      #d0d7de;
  --bg:          #f5f7fa;
  --shadow-sm:   0 1px 2px rgba(0,0,0,0.06), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-md:   0 2px 4px rgba(0,0,0,0.06), 0 6px 16px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--blue-mid); }
a:hover { color: var(--blue-dark); }

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* -------------------------------------------------------------------------
   Site header
   ------------------------------------------------------------------------- */

.site-header {
  background: var(--blue-dark);
  color: #fff;
  padding: 28px 0 24px;
  border-bottom: 4px solid var(--blue-mid);
}

.site-header h1 {
  margin: 0;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.site-header .tagline {
  margin: 4px 0 0;
  font-size: 14px;
  opacity: 0.85;
}

/* -------------------------------------------------------------------------
   Main content sections
   ------------------------------------------------------------------------- */

main.wrap {
  padding-top: 32px;
  padding-bottom: 60px;
}

.intro p {
  font-size: 16px;
  color: var(--text);
  max-width: 720px;
  margin: 0 0 32px;
}

.section-heading {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

section.tools {
  margin-bottom: 48px;
}

/* -------------------------------------------------------------------------
   Tool cards
   ------------------------------------------------------------------------- */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 20px 18px;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow-sm);
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
  min-height: 180px;
}

.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--blue-mid);
  color: var(--text);
}

.tool-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
}

.tool-card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--blue-dark);
  line-height: 1.3;
}

.tool-desc {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--text);
  flex: 1;
}

.tool-card-footer {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.open-arrow {
  font-size: 13px;
  font-weight: 500;
  color: var(--blue-mid);
}

.tool-card:hover .open-arrow {
  color: var(--blue-dark);
}

/* Placeholder cards (for planned tools) */
.tool-card-placeholder {
  background: #fafbfc;
  border-style: dashed;
  cursor: default;
}

.tool-card-placeholder:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
  border-color: var(--border);
}

.tool-card-placeholder h3 {
  color: var(--muted);
}

.tool-card-placeholder .tool-desc {
  color: var(--muted);
  font-style: italic;
}

.open-arrow-muted {
  font-size: 13px;
  color: var(--muted);
}

/* -------------------------------------------------------------------------
   Status badges
   ------------------------------------------------------------------------- */

.badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: 4px;
  white-space: nowrap;
}

.badge-live {
  background: var(--green-light);
  color: #2d5a2d;
  border: 1px solid var(--green-dark);
}

.badge-beta {
  background: var(--cream);
  color: #8a6d00;
  border: 1px solid #e6d59a;
}

.badge-planned {
  background: #f0f0f0;
  color: var(--muted);
  border: 1px solid var(--border);
}

/* -------------------------------------------------------------------------
   About section
   ------------------------------------------------------------------------- */

.about p {
  font-size: 14px;
  color: var(--text);
  margin: 0 0 10px;
}

.about .fine-print {
  font-size: 13px;
  color: var(--muted);
}

/* -------------------------------------------------------------------------
   Site footer
   ------------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 20px 0;
  margin-top: 40px;
}

.site-footer p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

/* -------------------------------------------------------------------------
   Shared component: back-to-portal link
   Use on individual calculator pages: <a class="back-link" href="../">← Dive Tools</a>
   ------------------------------------------------------------------------- */

.back-link {
  display: inline-block;
  font-size: 13px;
  color: #fff;
  text-decoration: none;
  opacity: 0.85;
  padding: 4px 8px;
  border-radius: 4px;
  margin-bottom: 4px;
}

.back-link:hover {
  opacity: 1;
  background: rgba(255,255,255,0.1);
  color: #fff;
}

/* -------------------------------------------------------------------------
   Mobile tweaks
   ------------------------------------------------------------------------- */

@media (max-width: 640px) {
  .site-header { padding: 22px 0 20px; }
  .site-header h1 { font-size: 22px; }
  .intro p { font-size: 15px; }
  .tool-grid { grid-template-columns: 1fr; }
  main.wrap { padding-top: 24px; }
}