/* ============================================================
   Quillbill — base design system
   Shared tokens + primitives for the marketing site and the app.
   ============================================================ */

:root {
  /* Palette — "ledger" theme: ink, paper, money green */
  --ink: #16241f;
  --ink-soft: #33453d;
  --muted: #5c6b64;
  --paper: #faf9f5;
  --card: #ffffff;
  --border: #e4e2da;
  --border-strong: #d2cfc4;

  --brand: #0e6b54;
  --brand-deep: #0a5241;
  --brand-tint: #e7f2ee;
  --brand-ink: #06392e;

  --gold: #b8860b;
  --danger: #b3403a;
  --danger-tint: #f9ecec;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    monospace;

  /* Shape */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(22, 36, 31, 0.06);
  --shadow: 0 6px 24px rgba(22, 36, 31, 0.08);
  --shadow-lg: 0 24px 60px rgba(22, 36, 31, 0.16);

  --container: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
  font-weight: 700;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease,
    transform 0.05s ease;
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: var(--brand-deep);
  color: #fff;
}

.btn-secondary {
  background: var(--card);
  color: var(--ink);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  border-color: var(--muted);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
}

.btn-ghost:hover {
  background: var(--brand-tint);
  color: var(--brand-ink);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 13.5px;
}

.btn-lg {
  padding: 15px 30px;
  font-size: 16.5px;
}

.btn-danger {
  background: var(--danger-tint);
  color: var(--danger);
  border-color: transparent;
}

/* ---------- Small bits ---------- */

.kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 14px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  background: var(--brand-tint);
  color: var(--brand-ink);
}

.badge-gold {
  background: #f7efdb;
  color: #7a5a08;
}

.muted {
  color: var(--muted);
}

.mono {
  font-family: var(--font-mono);
}

/* ---------- Brand mark ---------- */

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 30px;
  height: 30px;
  flex: none;
}

/* ---------- Forms ---------- */

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: 0.01em;
}

.field input,
.field select,
.field textarea {
  font: inherit;
  font-size: 14px;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
  width: 100%;
}

.field textarea {
  resize: vertical;
  min-height: 64px;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid var(--brand);
  outline-offset: -1px;
  border-color: var(--brand);
}

/* ---------- Utility ---------- */

.hidden {
  display: none !important;
}