/* ==========================================================================
   Ease Travel Planner — shared design system
   Plain CSS, no build step. Edit variables below to re-theme the whole site.
   ========================================================================== */

:root {
  /* Brand palette */
  --brand-primary: #146b73;
  --brand-primary-dark: #0d4d54;
  --brand-primary-light: #e3f1f1;
  --brand-accent: #e08a3e;
  --brand-accent-dark: #c06f28;

  /* Neutrals / text */
  --ink: #1b2430;
  --ink-muted: #55636f;
  --ink-faint: #8695a1;
  --bg: #ffffff;
  --bg-alt: #f5f8f8;
  --bg-card: #ffffff;
  --border: #e1e8ea;

  /* Feedback */
  --success: #2f9e63;
  --warning: #b45309;

  /* Icon-chip accent colors — light bg + dark fg pairs, one per tool/guide for visual variety */
  --chip-teal-bg: #e3f1f1;   --chip-teal-fg: #0d4d54;
  --chip-amber-bg: #fbe8d3;  --chip-amber-fg: #a85d12;
  --chip-blue-bg: #dceafb;   --chip-blue-fg: #1d5a96;
  --chip-violet-bg: #eae3fb; --chip-violet-fg: #5b3aa6;
  --chip-rose-bg: #fbe3e9;   --chip-rose-fg: #a62a55;

  /* Type */
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-size-base: 16px;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;

  /* Layout */
  --max-width: 1120px;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(20, 30, 40, 0.06), 0 4px 16px rgba(20, 30, 40, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand-primary: #3fa8a8;
    --brand-primary-dark: #2c8080;
    --brand-primary-light: #123334;
    --brand-accent: #f0a05f;
    --brand-accent-dark: #d98a44;
    --ink: #eef2f3;
    --ink-muted: #b3c0c6;
    --ink-faint: #7c8c94;
    --bg: #10161a;
    --bg-alt: #161d22;
    --bg-card: #1a2227;
    --border: #2a343a;

    --chip-teal-bg: #123334;   --chip-teal-fg: #5ec9c9;
    --chip-amber-bg: #3a2712;  --chip-amber-fg: #f0a05f;
    --chip-blue-bg: #132a3a;   --chip-blue-fg: #7ab6ec;
    --chip-violet-bg: #241a3a; --chip-violet-fg: #b79df0;
    --chip-rose-bg: #3a1520;   --chip-rose-fg: #ef92ad;
  }
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}
img, svg { max-width: 100%; display: block; }
a { color: var(--brand-primary-dark); }
@media (prefers-color-scheme: dark) { a { color: var(--brand-primary); } }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 var(--space-3); font-weight: 700; }
p { margin: 0 0 var(--space-3); }
ul, ol { margin: 0 0 var(--space-3); padding-left: 1.25em; }
label { font-weight: 600; font-size: 0.9rem; }
input, select, button { font-family: inherit; font-size: 1rem; }
table { border-collapse: collapse; width: 100%; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--brand-primary);
  color: #fff; padding: 0.6em 1em; z-index: 100; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Layout helpers ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}
.section { padding: var(--space-6) 0; }
.section-alt { background: var(--bg-alt); }
.section-tight { padding: var(--space-5) 0; }

.grid { display: grid; gap: var(--space-4); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid-2, .grid-3, .grid-5 { grid-template-columns: 1fr; }
}

/* ---------- Header / nav ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.55em;
  text-decoration: none;
  color: var(--ink);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.brand svg { width: 30px; height: 30px; flex-shrink: 0; }
.brand-name-accent { color: var(--brand-primary-dark); }
@media (prefers-color-scheme: dark) { .brand-name-accent { color: var(--brand-primary); } }

.main-nav { display: flex; align-items: center; gap: var(--space-4); }
.main-nav ul { list-style: none; display: flex; gap: var(--space-4); margin: 0; padding: 0; }
.main-nav a {
  text-decoration: none; color: var(--ink-muted); font-weight: 600; font-size: 0.95rem;
  padding: 0.4em 0.1em; border-bottom: 2px solid transparent;
}
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--brand-accent); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--border); border-radius: var(--radius-sm);
  width: 42px; height: 38px; cursor: pointer; align-items: center; justify-content: center;
}
.nav-toggle svg { width: 20px; height: 20px; }

@media (max-width: 780px) {
  .main-nav {
    position: absolute; top: 68px; left: 0; right: 0; background: var(--bg);
    border-bottom: 1px solid var(--border); flex-direction: column; align-items: stretch;
    padding: var(--space-3) var(--space-4); display: none; box-shadow: var(--shadow);
  }
  .main-nav.is-open { display: flex; }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav li { border-top: 1px solid var(--border); }
  .main-nav li:first-child { border-top: none; }
  .main-nav a { display: block; padding: 0.85em 0.1em; }
  .nav-toggle { display: inline-flex; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5em;
  padding: 0.75em 1.3em; border-radius: var(--radius-sm); font-weight: 700;
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
  font-size: 0.98rem; line-height: 1.2;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--brand-primary); color: #fff; }
.btn-primary:hover { background: var(--brand-primary-dark); box-shadow: 0 6px 16px rgba(20, 107, 115, 0.32); }
.btn-accent { background: var(--brand-accent); color: #1b1206; }
.btn-accent:hover { background: var(--brand-accent-dark); box-shadow: 0 6px 16px rgba(224, 138, 62, 0.35); }
.btn-outline { background: transparent; color: var(--ink); border-color: var(--border); }
.btn-outline:hover { border-color: var(--brand-primary); color: var(--brand-primary-dark); }
.btn-block { width: 100%; }
.btn-sm { padding: 0.5em 0.9em; font-size: 0.88rem; }
.btn[disabled] { opacity: 0.7; cursor: progress; transform: none; }

.btn .spinner {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.4); border-top-color: currentColor;
  animation: spin 0.7s linear infinite; display: inline-block;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: var(--space-6) 0 var(--space-5);
  background: linear-gradient(180deg, var(--brand-primary-light) 0%, var(--bg) 100%);
  overflow: hidden;
}
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%; z-index: 0;
  filter: blur(60px); opacity: 0.35; animation: drift 16s ease-in-out infinite alternate;
}
.hero::before {
  width: 340px; height: 340px; background: var(--brand-accent);
  top: -120px; right: -80px;
}
.hero::after {
  width: 260px; height: 260px; background: var(--brand-primary);
  bottom: -100px; left: -60px; animation-delay: -8s;
}
.hero .container { position: relative; z-index: 1; }
.hero h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); max-width: 18ch; }
.hero p.lead { font-size: 1.15rem; color: var(--ink-muted); max-width: 56ch; }
.hero-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--space-4); }

/* ---------- Trust badges ---------- */
.trust-row { display: flex; flex-wrap: wrap; gap: 0.6em; margin-top: var(--space-4); }
.trust-badge {
  display: inline-flex; align-items: center; gap: 0.45em;
  background: var(--bg); border: 1px solid var(--border); border-radius: 100px;
  padding: 0.45em 0.9em 0.45em 0.6em; font-size: 0.85rem; font-weight: 600; color: var(--ink-muted);
  box-shadow: var(--shadow);
}
.trust-badge svg { width: 16px; height: 16px; color: var(--brand-primary-dark); flex-shrink: 0; }

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: var(--space-4); box-shadow: var(--shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-primary);
  box-shadow: 0 8px 24px rgba(20, 30, 40, 0.1), 0 2px 8px rgba(20, 30, 40, 0.08);
}
.card h3 { font-size: 1.1rem; margin-bottom: 0.4em; }
.card p { color: var(--ink-muted); margin-bottom: var(--space-3); font-size: 0.95rem; }
.tool-card { display: flex; flex-direction: column; height: 100%; }
.tool-card .icon {
  width: 44px; height: 44px; border-radius: 10px; background: var(--brand-primary-light);
  display: flex; align-items: center; justify-content: center; margin-bottom: var(--space-3);
  transition: transform 0.25s ease;
}
.tool-card .icon svg { width: 24px; height: 24px; color: var(--brand-primary-dark); }
.tool-card:hover .icon { transform: scale(1.08) rotate(-4deg); }
.tool-card .btn { margin-top: auto; }

/* Icon-chip color variants — one per tool/guide, for visual variety */
.icon-teal   { background: var(--chip-teal-bg); }   .icon-teal svg   { color: var(--chip-teal-fg); }
.icon-amber  { background: var(--chip-amber-bg); }  .icon-amber svg  { color: var(--chip-amber-fg); }
.icon-blue   { background: var(--chip-blue-bg); }   .icon-blue svg   { color: var(--chip-blue-fg); }
.icon-violet { background: var(--chip-violet-bg); } .icon-violet svg { color: var(--chip-violet-fg); }
.icon-rose   { background: var(--chip-rose-bg); }   .icon-rose svg   { color: var(--chip-rose-fg); }

.badge {
  display: inline-block; font-size: 0.75rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.04em; background: var(--brand-primary-light); color: var(--brand-primary-dark);
  padding: 0.3em 0.7em; border-radius: 100px; margin-bottom: var(--space-2);
}
.badge-teal   { background: var(--chip-teal-bg);   color: var(--chip-teal-fg); }
.badge-amber  { background: var(--chip-amber-bg);  color: var(--chip-amber-fg); }
.badge-blue   { background: var(--chip-blue-bg);   color: var(--chip-blue-fg); }
.badge-violet { background: var(--chip-violet-bg); color: var(--chip-violet-fg); }
.badge-rose   { background: var(--chip-rose-bg);   color: var(--chip-rose-fg); }

/* ---------- Forms (tool pages) ---------- */
.tool-shell {
  display: grid; grid-template-columns: minmax(280px, 380px) 1fr; gap: var(--space-5);
  align-items: start;
}
@media (max-width: 860px) { .tool-shell { grid-template-columns: 1fr; } }

.form-panel { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--space-4); box-shadow: var(--shadow); }
.field { margin-bottom: var(--space-3); }
.field label { display: block; margin-bottom: 0.35em; }
.field input, .field select {
  width: 100%; padding: 0.65em 0.75em; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--ink);
}
.field input:focus, .field select:focus { outline: 2px solid var(--brand-primary); outline-offset: 1px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.hint { font-size: 0.82rem; color: var(--ink-faint); margin-top: 0.3em; }

.result-panel { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--space-4); box-shadow: var(--shadow); min-height: 220px; }
.result-panel .placeholder { color: var(--ink-faint); text-align: center; padding: var(--space-5) 0; }

.bar-row { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-2); }
.bar-label { width: 110px; flex-shrink: 0; font-size: 0.88rem; color: var(--ink-muted); }
.bar-track { flex: 1; background: var(--bg-alt); border-radius: 100px; height: 10px; overflow: hidden; }
.bar-fill { display: block; height: 100%; border-radius: 100px; background: var(--brand-primary); }
.bar-value { width: 70px; text-align: right; font-weight: 700; font-size: 0.9rem; flex-shrink: 0; }

.checklist { list-style: none; padding: 0; margin: 0; }
.checklist li {
  display: flex; align-items: flex-start; gap: 0.6em; padding: 0.6em 0; border-bottom: 1px solid var(--border);
}
.checklist li:last-child { border-bottom: none; }
.checklist input[type="checkbox"] { margin-top: 0.3em; width: 16px; height: 16px; accent-color: var(--brand-primary); }

.total-row {
  display: flex; justify-content: space-between; align-items: baseline; padding-top: var(--space-3);
  margin-top: var(--space-3); border-top: 1px solid var(--border); font-weight: 800; font-size: 1.15rem;
}

/* ---------- Affiliate CTA box ---------- */
.cta-box {
  background: var(--brand-primary-light); border: 1px solid var(--border); border-radius: var(--radius);
  padding: var(--space-4); margin-top: var(--space-4);
}
.cta-box h4 { margin-bottom: 0.3em; }
.cta-box p { color: var(--ink-muted); font-size: 0.9rem; }
.affiliate-note { font-size: 0.75rem; color: var(--ink-faint); margin-top: var(--space-2); }

/* ---------- Prose (guides) ---------- */
.prose { max-width: 72ch; }
.prose h2 { margin-top: var(--space-5); font-size: 1.4rem; }
.prose h3 { margin-top: var(--space-4); font-size: 1.15rem; }
.prose p, .prose li { color: var(--ink); }
.prose table { margin: var(--space-3) 0; font-size: 0.92rem; }
.prose th, .prose td { border: 1px solid var(--border); padding: 0.6em 0.8em; text-align: left; }
.prose th { background: var(--bg-alt); }

.breadcrumbs { font-size: 0.85rem; color: var(--ink-faint); margin-bottom: var(--space-3); }
.breadcrumbs a { color: var(--ink-faint); }
.byline { font-size: 0.85rem; color: var(--ink-faint); margin-bottom: var(--space-4); }

/* ---------- Footer ---------- */
.site-footer { background: var(--bg-alt); border-top: 1px solid var(--border); padding: var(--space-6) 0 var(--space-4); margin-top: var(--space-6); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-4); margin-bottom: var(--space-5); }
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-grid h5 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-faint); margin-bottom: var(--space-3); }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 0.5em; }
.footer-grid a { color: var(--ink-muted); text-decoration: none; font-size: 0.92rem; }
.footer-grid a:hover { color: var(--ink); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: var(--space-4); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-2); font-size: 0.82rem; color: var(--ink-faint); }

/* ---------- Misc ---------- */
.eyebrow { color: var(--brand-primary-dark); font-weight: 700; text-transform: uppercase; font-size: 0.8rem; letter-spacing: 0.05em; }
@media (prefers-color-scheme: dark) { .eyebrow { color: var(--brand-primary); } }
.center { text-align: center; }
.mt-0 { margin-top: 0; }
.text-muted { color: var(--ink-muted); }
hr.rule { border: none; border-top: 1px solid var(--border); margin: var(--space-5) 0; }

/* ---------- Motion: keyframes ---------- */
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-24px, 18px) scale(1.08); }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Scroll reveal (progressively enhanced by main.js) ---------- */
.will-reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.will-reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Result panels animate in fresh each time they're filled */
.result-fade { animation: fadeInUp 0.4s ease; }

/* ---------- Respect reduced-motion preference ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero::before, .hero::after { animation: none; }
  .card:hover { transform: none; }
  .tool-card:hover .icon { transform: none; }
  .btn:hover { transform: none; }
  .will-reveal { opacity: 1; transform: none; transition: none; }
  .result-fade { animation: none; }
  .btn .spinner { animation-duration: 1.4s; }
}