/* =========================================================================
   Courier Rate Calculator — internal logistics tool
   Palette: ink + cool neutrals, single dispatch-amber accent.
   Numbers/weights/prices set in a mono face for an "instrument readout" feel.
   ========================================================================= */

:root {
  --ink:        #1F337D;   /* JANEX navy — primary buttons, headings */
  --ink-2:      #28409A;   /* navy hover */
  --navy-deep:  #16264F;   /* deep navy — final-price bar */
  --surface:    #FFFFFF;
  --app-bg:     #EAEDF3;
  --line:       #D3D9E4;
  --line-soft:  #E8ECF3;
  --text:       #1A2438;
  --muted:      #5E6780;
  --accent:     #C4381F;   /* JANEX red — accent */
  --accent-ink: #8A2814;
  --accent-bg:  #FBE7E2;
  --accent-line:#F1C7BD;
  --ok:         #1D7A57;
  --danger:     #C0392B;
  --danger-bg:  #FBECEA;

  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, monospace;

  --r: 14px;
  --r-sm: 10px;
  --shadow: 0 1px 2px rgba(16, 34, 46, .05), 0 8px 24px rgba(16, 34, 46, .07);
  --tap: 52px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--text);
  background: var(--app-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 560px;
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: env(safe-area-inset-top) 16px calc(16px + env(safe-area-inset-bottom));
}

/* ---- Masthead ---------------------------------------------------------- */
.masthead {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 10px;
  padding: 24px 4px 18px;
}
.masthead__logo {
  height: 46px;
  width: auto;
  max-width: 78%;
}
.masthead__title h1 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.masthead__title p {
  margin: 2px 0 0;
  font-size: .84rem;
  color: var(--muted);
}

/* ---- Sheet / cards ----------------------------------------------------- */
.sheet { flex: 1; }

.form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  padding: 18px 16px 20px;
}

.field { margin-bottom: 16px; }
.field:last-child { margin-bottom: 0; }

.field > label,
.dims legend {
  display: block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--ink-2);
  margin-bottom: 7px;
}

input[type="number"],
select {
  width: 100%;
  height: var(--tap);
  padding: 0 14px;
  font-family: var(--font-ui);
  font-size: 1rem;
  color: var(--text);
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: var(--r-sm);
  appearance: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
input[type="number"] { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

input:focus,
select:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(16, 34, 46, .12);
}

.select-wrap { position: relative; }
.select-wrap::after {
  content: "";
  position: absolute;
  right: 16px; top: 50%;
  width: 9px; height: 9px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
}

/* per-kg rate chip shown under the country dropdown */
.rate-chip {
  margin: 9px 2px 0;
  padding: 8px 12px;
  font-size: .86rem;
  color: var(--ink-2);
  background: var(--accent-bg);
  border: 1px solid var(--accent-line);
  border-radius: var(--r-sm);
}
.rate-chip strong {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--accent-ink);
}
.rate-chip__sep { margin: 0 8px; color: var(--accent-line); }

/* dimensions block */
.dims {
  margin: 0 0 16px;
  padding: 0;
  border: 0;
}
.legend-opt {
  font-weight: 500;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted);
  background: var(--line-soft);
  padding: 2px 7px;
  border-radius: 999px;
  margin-left: 6px;
}
.dims__hint {
  margin: 0 2px 10px;
  font-size: .76rem;
  color: var(--muted);
}
.dims__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.dims__grid .field { margin-bottom: 0; }
.dims__grid input { padding: 0 10px; text-align: center; }

/* validation */
.field__error {
  margin: 6px 2px 0;
  min-height: 1em;
  font-size: .78rem;
  color: var(--danger);
}
.field--error input,
.field--error select {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(192, 57, 43, .1);
}

/* ---- Buttons ----------------------------------------------------------- */
.actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 20px;
}
.btn {
  height: var(--tap);
  padding: 0 22px;
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 650;
  border-radius: var(--r-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .04s ease, background-color .15s ease, border-color .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 3px solid rgba(16, 34, 46, .3); outline-offset: 2px; }

.btn--primary {
  background: var(--ink);
  color: #fff;
}
.btn--primary:hover { background: var(--ink-2); }
.btn--primary:disabled { opacity: .6; cursor: progress; }

.btn--ghost {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--muted); }

.linkbtn {
  display: inline-block;
  margin-top: 16px;
  padding: 6px 2px;
  font-size: .86rem;
  font-weight: 600;
  color: var(--accent-ink);
  background: none;
  border: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.linkbtn:focus-visible { outline: 3px solid rgba(16, 34, 46, .3); outline-offset: 2px; border-radius: 4px; }

/* ---- Rate details ------------------------------------------------------ */
.rate-card { margin-top: 14px; }
.rate-details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  padding: 16px;
}
.rate-details__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}
.rate-details__head h3 {
  margin: 0;
  font-size: 1rem;
  color: var(--ink);
}
.pill {
  flex: none;
  font-size: .74rem;
  font-weight: 600;
  color: var(--accent-ink);
  background: var(--accent-bg);
  padding: 4px 10px;
  border-radius: 999px;
}
.rate-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
.rate-table th,
.rate-table td {
  text-align: left;
  padding: 10px 4px;
  border-bottom: 1px solid var(--line-soft);
}
.rate-table thead th {
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted);
  font-weight: 600;
}
.rate-table tbody tr:last-child td { border-bottom: 0; }
.rate-table .num {
  text-align: right;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---- Result docket ----------------------------------------------------- */
.result { margin-top: 14px; }

.docket {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 4px solid var(--accent);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  padding: 18px 18px 16px;
}

.docket__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}
.docket__eyebrow {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  font-weight: 700;
}
.docket__dest {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.readout { margin: 0; }
.readout__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
}
.readout__row dt {
  color: var(--muted);
  font-size: .92rem;
}
.readout__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .98rem;
  color: var(--text);
}
.readout__row--strong dt { color: var(--ink); font-weight: 600; display: flex; align-items: center; gap: 8px; }
.readout__row--strong dd { font-weight: 700; color: var(--ink); }

.tag {
  font-family: var(--font-ui);
  font-size: .64rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--accent-ink);
  background: var(--accent-bg);
  padding: 2px 7px;
  border-radius: 999px;
}

.perf {
  height: 1px;
  margin: 12px 0;
  background-image: linear-gradient(to right, var(--line) 45%, transparent 45%);
  background-size: 10px 1px;
  background-repeat: repeat-x;
}

.final {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  padding: 14px 16px;
  background: var(--navy-deep);
  border-radius: var(--r-sm);
}
.final__label {
  color: #B7C4CC;
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 700;
}
.final__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.9rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
}

.note {
  margin: 12px 2px 0;
  font-size: .76rem;
  color: var(--muted);
}

/* empty / guidance state before a valid estimate exists */
.docket--empty {
  border-top-color: var(--line);
  border-style: dashed;
  box-shadow: none;
  background: transparent;
}
.empty-msg {
  margin: 0;
  padding: 6px 2px;
  font-size: .9rem;
  color: var(--muted);
}

/* ---- Footer ------------------------------------------------------------ */
.footer {
  margin-top: 22px;
  padding: 14px 4px 4px;
  text-align: center;
}
.footer p {
  margin: 0;
  font-size: .74rem;
  color: var(--muted);
}

/* ---- Larger screens ---------------------------------------------------- */
@media (min-width: 600px) {
  .masthead__text h1 { font-size: 1.35rem; }
  .final__value { font-size: 2.1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .btn:active { transform: none; }
}