/* ============================================================
   TariffWise — professional, clean UI (light + dark aware)
   ============================================================ */

:root {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-ink: #ffffff;
  --success: #16a34a;
  --success-soft: #f0fdf4;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 8px 24px rgba(15, 23, 42, .06);
  --radius: 14px;
  --radius-sm: 9px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --surface: #131c31;
    --surface-2: #1b2740;
    --text: #e5edff;
    --muted: #93a4c4;
    --border: #263450;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-ink: #06122b;
    --success: #34d399;
    --success-soft: #0d2a20;
    --danger: #f87171;
    --danger-soft: #2a1516;
    --shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 12px 32px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* ===== Top bar ===== */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: .85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: .55rem; font-size: 1.2rem; font-weight: 700; letter-spacing: -.01em; }
.brand-mark { font-size: 1.35rem; }
.brand-name span { color: var(--primary); }
.badge-free {
  font-size: .72rem;
  font-weight: 600;
  color: var(--success);
  background: var(--success-soft);
  border: 1px solid color-mix(in srgb, var(--success) 35%, transparent);
  padding: .25rem .6rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* ===== Hero ===== */
.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.75rem 1.25rem 1.25rem;
  text-align: center;
}
.hero h1 {
  margin: 0 0 .6rem;
  font-size: clamp(1.7rem, 4.5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -.025em;
  line-height: 1.15;
}
.hero-sub { margin: 0 auto .9rem; max-width: 520px; font-size: 1.05rem; color: var(--muted); }
.hero-note {
  display: inline-block;
  margin: 0;
  font-size: .88rem;
  color: var(--text);
  background: var(--danger-soft);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  padding: .6rem 1rem;
  border-radius: var(--radius-sm);
}

/* ===== Layout ===== */
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
}
.card-head { margin-bottom: 1.25rem; }
.card-head h2 { margin: 0 0 .25rem; font-size: 1.2rem; font-weight: 700; letter-spacing: -.01em; }
.card-desc { margin: 0; color: var(--muted); font-size: .9rem; }

/* ===== Form fields ===== */
.field { margin-bottom: 1.1rem; }
.field label {
  display: block;
  font-weight: 600;
  margin-bottom: .4rem;
  font-size: .9rem;
}
.hint { display: block; font-weight: 400; color: var(--muted); font-size: .78rem; margin-top: .1rem; }

input, select {
  width: 100%;
  padding: .7rem .8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1rem;
  transition: border-color .15s, box-shadow .15s;
}
input::placeholder { color: var(--muted); opacity: .8; }
input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 22%, transparent);
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 520px) { .grid { grid-template-columns: 1fr; } }

.row { display: flex; gap: .55rem; }
.row input { flex: 1; }

/* ===== Buttons ===== */
.btn {
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  padding: .7rem 1.1rem;
  transition: background .15s, border-color .15s, opacity .15s;
}
.btn.primary {
  width: 100%;
  background: var(--primary);
  color: var(--primary-ink);
  margin-top: .35rem;
  font-size: 1rem;
}
.btn.primary:hover { background: var(--primary-hover); }
.btn.ghost {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border);
  white-space: nowrap;
}
.btn.ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn:disabled { opacity: .55; cursor: wait; }

/* ===== Status text ===== */
.status { font-size: .84rem; margin-top: .45rem; min-height: 1.1em; }
.status.ok { color: var(--success); }
.status.err { color: var(--danger); }

/* ===== Result ===== */
.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
}
.breakdown { width: 100%; border-collapse: collapse; }
.breakdown td { padding: .6rem .25rem; border-bottom: 1px solid var(--border); }
.breakdown td:last-child { text-align: right; font-variant-numeric: tabular-nums; font-weight: 600; }
.breakdown tr.sub td { color: var(--muted); font-size: .82rem; font-weight: 400; padding: .3rem .25rem .3rem 1rem; }
.breakdown tr.total td {
  font-size: 1.2rem;
  color: var(--text);
  border-top: 2px solid var(--border);
  border-bottom: none;
  padding-top: .85rem;
}
.breakdown tr.total td:last-child { color: var(--primary); }
.breakdown tr.price td { font-size: 1.15rem; font-weight: 700; border-bottom: none; }
.breakdown tr.price td:last-child { color: var(--success); }
.note { color: var(--muted); font-size: .8rem; margin: .9rem 0 0; }

.alert {
  background: var(--danger-soft);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  color: var(--text);
  padding: .8rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.15rem;
  font-size: .9rem;
}
.disclaimer { color: var(--muted); font-size: .78rem; text-align: center; margin: 1.1rem 0 0; }

/* ===== Result hero (two big numbers — the first thing a user sees) ===== */
.example-tag {
  text-align: center;
  font-size: .85rem;
  color: var(--muted);
  margin: 0 0 .9rem;
}
.result-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.1rem;
}
@media (max-width: 520px) { .result-hero { grid-template-columns: 1fr; } }
.hero-num {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1.25rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: .3rem;
}
.hero-num.accent { border-color: color-mix(in srgb, var(--success) 45%, transparent); }
.hero-num-label { font-size: .82rem; color: var(--muted); font-weight: 600; }
.hero-num-value { font-size: 2rem; font-weight: 800; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.hero-num.accent .hero-num-value { color: var(--success); }
.hero-num-sub { font-size: .78rem; color: var(--muted); }

/* ===== Money slot (affiliate CTA) ===== */
.cta-card {
  display: flex;
  align-items: center;
  gap: .9rem;
  text-decoration: none;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  margin-bottom: 1.1rem;
  transition: border-color .15s, transform .1s;
}
.cta-card:hover { border-color: var(--primary); transform: translateY(-1px); }
.cta-icon { font-size: 1.6rem; }
.cta-text { display: flex; flex-direction: column; gap: .15rem; }
.cta-text strong { color: var(--text); font-size: .98rem; }
.cta-text span { color: var(--muted); font-size: .84rem; }
.affiliate-note { color: var(--muted); font-size: .74rem; text-align: center; margin: -.6rem 0 1.1rem; }

/* Breakdown collapsed by default — keeps jargon out of the way */
.breakdown-box summary {
  cursor: pointer;
  font-weight: 600;
  font-size: .92rem;
  list-style: none;
}
.breakdown-box summary::-webkit-details-marker { display: none; }
.breakdown-box summary::before { content: "▸ "; color: var(--muted); }
.breakdown-box[open] summary::before { content: "▾ "; }
.breakdown-box[open] summary { margin-bottom: .75rem; }

/* ===== Key box ===== */
.keybox summary {
  cursor: pointer;
  font-weight: 600;
  font-size: .92rem;
  list-style: none;
}
.keybox summary::-webkit-details-marker { display: none; }
.keybox summary::before { content: "▸ "; color: var(--muted); }
.keybox[open] summary::before { content: "▾ "; }
.keybox .row, .keybox .small { margin-top: .9rem; }
.small { color: var(--muted); font-size: .82rem; }
.small a { color: var(--primary); }

/* ===== SEO / info content ===== */
.info {
  max-width: 720px;
  margin: .5rem auto 0;
  padding: .5rem 0 1rem;
}
.info h2 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -.01em;
  margin: 1.6rem 0 .5rem;
}
.info p { color: var(--muted); margin: 0 0 .6rem; }
.info p strong { color: var(--text); }
.info .how { color: var(--muted); padding-left: 1.2rem; margin: 0 0 .6rem; }
.info .how li { margin-bottom: .35rem; }
.faq {
  border-bottom: 1px solid var(--border);
  padding: .75rem 0;
}
.faq summary { cursor: pointer; font-weight: 600; font-size: .95rem; }
.faq p { margin: .5rem 0 0; font-size: .9rem; }

/* ===== Footer ===== */
.site-footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  text-align: center;
  color: var(--muted);
  font-size: .8rem;
  border-top: 1px solid var(--border);
}
.site-footer p { margin: .35rem 0; }
.copyright { opacity: .75; }