/* ==========================================================================
   Freelance Payment Kit — stylesheet
   Plain CSS. No build step, no framework.
   Section order: variables → base → layout → header → hero → blocks →
   cards → forms → generator output → tracker → templates → footer → toast
   ========================================================================== */

:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-2: #fbfcfe;
  --ink: #0f172a;
  --ink-2: #3f4a5c;
  --ink-3: #667085;
  --line: #e4e8f0;
  --line-strong: #cfd6e4;
  --brand: #4f46e5;
  --brand-dark: #4338ca;
  --brand-soft: #eef1ff;
  --ok: #0f766e;
  --ok-soft: #e6f6f3;
  --warn: #b45309;
  --warn-soft: #fdf2e2;
  --danger: #b42318;
  --danger-soft: #fdeceb;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 9px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 1px 2px rgba(16, 24, 40, 0.04), 0 12px 28px -18px rgba(16, 24, 40, 0.28);
  --max: 1080px;
}

* { box-sizing: border-box; }

/* The hidden attribute must win over component display rules
   (for example .btn { display: inline-flex }). */
[hidden] { display: none !important; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.015em; margin: 0 0 0.5em; }
h1 { font-size: clamp(1.85rem, 4.6vw, 2.85rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.3rem, 2.4vw, 1.6rem); }
h3 { font-size: 1.05rem; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
a { color: var(--brand-dark); }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: #eef1f6;
  border-radius: 5px;
  padding: 0.1em 0.35em;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: #fff;
  padding: 10px 16px; border-radius: 0 0 8px 0; z-index: 100;
}
.skip-link:focus { left: 0; }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 64px;
  flex-wrap: wrap;
  padding-top: 8px;
  padding-bottom: 8px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  font-size: 0.65rem;
  letter-spacing: 0.06em;
}

.nav {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  max-width: 100%;
}
.nav::-webkit-scrollbar { display: none; }

.nav a {
  padding: 8px 12px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--ink-2);
  font-size: 0.92rem;
  font-weight: 500;
  white-space: nowrap;
}
.nav a:hover { background: #eef1f6; color: var(--ink); }
.nav a.is-active { background: var(--brand-soft); color: var(--brand-dark); font-weight: 600; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 9vw, 88px) 0 clamp(28px, 5vw, 48px);
  background:
    radial-gradient(720px 320px at 50% -60px, rgba(79, 70, 229, 0.13), transparent 70%),
    radial-gradient(520px 260px at 88% 0%, rgba(14, 165, 233, 0.10), transparent 70%);
  border-bottom: 1px solid var(--line);
}

.hero-inner { text-align: center; max-width: 760px; }

.eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 5px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.hero h1 { margin-bottom: 16px; }

.lede {
  font-size: clamp(1.02rem, 1.6vw, 1.16rem);
  color: var(--ink-2);
  max-width: 620px;
  margin: 0 auto 26px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.micro { font-size: 0.84rem; color: var(--ink-3); margin: 0; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.94rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.08s ease, box-shadow 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 3px solid rgba(79, 70, 229, 0.35); outline-offset: 2px; }

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.12), 0 8px 18px -10px rgba(79, 70, 229, 0.75);
}
.btn-primary:hover { background: var(--brand-dark); }

.btn-ghost {
  background: #fff;
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-ghost:hover { background: #f7f8fc; border-color: #b9c2d4; }

.btn-sm { padding: 7px 12px; font-size: 0.84rem; border-radius: 8px; }

.btn-ghost.danger { color: var(--danger); border-color: #f0cdc9; }
.btn-ghost.danger:hover { background: var(--danger-soft); border-color: #e5b4ae; }

/* ---------- generic blocks ---------- */
.page { padding-bottom: 72px; }

.block { padding: clamp(36px, 6vw, 56px) 0 0; }
.block h2 { margin-bottom: 6px; }

.section-sub {
  color: var(--ink-3);
  margin: 0 0 26px;
  max-width: 660px;
}

.page-head { padding: clamp(32px, 6vw, 56px) 20px 22px; }
.page-head h1 { margin-bottom: 8px; }
.page-head .section-sub { margin-bottom: 0; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

/* ---------- cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: clamp(18px, 2.6vw, 26px);
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}
.card-title.spaced { margin-top: 26px; }

.feature { display: flex; flex-direction: column; }
.feature-icon {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  margin-bottom: 14px;
}
.feature-icon svg { width: 19px; height: 19px; }
.feature h3 { margin-bottom: 8px; }
.feature p { color: var(--ink-2); font-size: 0.94rem; margin: 0; }

.steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  counter-reset: step;
}
.steps li {
  display: flex;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 18px;
}
.steps h3 { font-size: 0.98rem; margin-bottom: 6px; }
.steps p { font-size: 0.9rem; color: var(--ink-2); margin: 0; }
.step-num {
  flex: 0 0 auto;
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
}

.faq { display: grid; gap: 10px; margin-top: 20px; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px 18px;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 0.96rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  color: var(--ink-3);
  font-weight: 400;
  font-size: 1.2rem;
  line-height: 1;
}
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 12px 0 0; color: var(--ink-2); font-size: 0.94rem; }

.prose { color: var(--ink-2); }
.prose ul { margin: 0; padding-left: 20px; }
.prose li { margin-bottom: 10px; }
.prose li:last-child { margin-bottom: 0; }
.prose strong { color: var(--ink); }

/* ---------- forms ---------- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
}

.form-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.field { display: flex; flex-direction: column; min-width: 0; }
.field.inline { gap: 4px; }

.field label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 6px;
}
.req { color: var(--danger); font-weight: 700; }

input[type="text"],
input[type="number"],
input[type="search"],
input[type="date"],
select,
textarea {
  width: 100%;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

textarea { resize: vertical; line-height: 1.65; }

input:focus, select:focus, textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.16);
}

input[aria-invalid="true"] { border-color: var(--danger); background: #fff; }
input[aria-invalid="true"]:focus { box-shadow: 0 0 0 3px rgba(180, 35, 24, 0.14); }

.hint { font-size: 0.78rem; color: var(--ink-3); margin: 6px 0 0; line-height: 1.5; }

.field-error {
  font-size: 0.8rem;
  color: var(--danger);
  margin: 6px 0 0;
  font-weight: 500;
}

.form-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 20px;
  align-items: center;
}
.form-actions.split { justify-content: space-between; margin-top: 18px; }

/* ---------- two column layout ---------- */
.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

/* Tracker uses a single column: the table needs the full width. */
.tracker-stack { display: grid; gap: 18px; }

/* ---------- generator output ---------- */
.output-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.output-head .card-title { margin-bottom: 16px; }

.pill {
  font-size: 0.74rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  white-space: nowrap;
}

.output-empty {
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--surface-2);
  padding: 34px 18px;
  text-align: center;
  color: var(--ink-3);
  font-size: 0.92rem;
}
.output-empty p { margin: 0 0 6px; }

.mini-label {
  display: block;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  margin: 0 0 6px;
}

.subject-row { display: flex; gap: 8px; margin-bottom: 16px; align-items: flex-start; }
.subject-input {
  font-weight: 600;
  resize: none;
  min-height: 62px;
  line-height: 1.4;
}
.subject-row .btn { flex: 0 0 auto; }

.body-out { min-height: 260px; font-size: 0.95rem; }

/* ---------- notices ---------- */
.notice {
  background: var(--warn-soft);
  border: 1px solid #f2ddbd;
  border-radius: var(--radius-md);
  padding: 13px 16px;
  font-size: 0.88rem;
  color: #7a4a08;
  margin: 0 0 18px;
  line-height: 1.55;
}
.notice strong { color: #653c05; }

/* ---------- tracker ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}
.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
}
.stat-label {
  display: block;
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  margin-bottom: 4px;
}
.stat-value { font-size: 1.22rem; font-weight: 700; letter-spacing: -0.02em; }

.tracker-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr);
  gap: 12px;
  margin-bottom: 14px;
}

.table-wrap { width: 100%; overflow-x: auto; }

.tracker-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.tracker-table th {
  text-align: left;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  padding: 8px 8px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.tracker-table td {
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
  color: var(--ink-2);
}
.tracker-table tbody tr:last-child td { border-bottom: none; }
.tracker-table .num { white-space: nowrap; font-variant-numeric: tabular-nums; color: var(--ink); font-weight: 600; }
.tracker-table .notes-cell { max-width: 280px; overflow-wrap: anywhere; }
.tracker-table td:nth-child(2),
.tracker-table td:nth-child(4) { white-space: nowrap; }
.tracker-table .row-actions { display: flex; gap: 6px; justify-content: flex-end; white-space: nowrap; }

.status {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  white-space: nowrap;
}
.status.pending { background: var(--brand-soft); color: var(--brand-dark); }
.status.overdue { background: var(--danger-soft); color: var(--danger); }
.status.paid { background: var(--ok-soft); color: var(--ok); }

.empty-state {
  color: var(--ink-3);
  font-size: 0.9rem;
  text-align: center;
  padding: 22px 10px 8px;
  margin: 0;
}

/* ---------- templates ---------- */
.template-list { display: grid; gap: 16px; }

.template-card .template-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.template-card h2 { font-size: 1.05rem; margin: 0 0 4px; }
.template-card .when { font-size: 0.88rem; color: var(--ink-3); margin: 0; max-width: 560px; }

.template-subject {
  font-size: 0.86rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 11px;
  margin-bottom: 10px;
  color: var(--ink-2);
  overflow-wrap: anywhere;
}
.template-subject b { color: var(--ink-3); font-weight: 700; text-transform: uppercase; font-size: 0.72rem; letter-spacing: 0.06em; margin-right: 8px; }

.template-body {
  white-space: pre-wrap;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin: 0;
  overflow-wrap: anywhere;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 34px 0;
  margin-top: 20px;
}
.footer-inner { display: grid; gap: 14px; }
.footer-brand { font-weight: 700; margin: 0 0 4px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.footer-nav a {
  font-size: 0.87rem;
  color: var(--ink-2);
  text-decoration: none;
}
.footer-nav a:hover { color: var(--brand-dark); text-decoration: underline; }
.copyright { font-size: 0.8rem; }

/* ---------- toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 12px);
  background: #14203a;
  color: #fff;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 11px 18px;
  border-radius: 10px;
  box-shadow: 0 12px 30px -12px rgba(16, 24, 40, 0.55);
  opacity: 0;
  transition: opacity 0.18s ease, transform 0.18s ease;
  z-index: 60;
  max-width: min(92vw, 420px);
  text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.error { background: #7f1d1d; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
  .grid-3, .steps { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .form-grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tracker-toolbar { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .header-inner { gap: 8px; }
  .brand-text { font-size: 0.95rem; }
  .nav { width: 100%; margin: 0 -4px; }
  .nav a { padding: 7px 10px; font-size: 0.86rem; }
  .form-grid, .form-grid-3 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; gap: 8px; }
  .stat { display: flex; align-items: baseline; justify-content: space-between; padding: 11px 14px; }
  .stat-label { margin: 0; }
  .tracker-toolbar { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .subject-row { flex-wrap: wrap; }
  .subject-row .btn { width: 100%; }
  .output-head { flex-wrap: wrap; }

  /* table becomes stacked cards */
  .tracker-table thead { display: none; }
  .tracker-table, .tracker-table tbody { display: block; width: 100%; }
  .tracker-table tr {
    display: block;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    margin-bottom: 10px;
    background: var(--surface);
  }
  .tracker-table td {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 14px;
    border: none;
    padding: 5px 0;
    text-align: right;
  }
  .tracker-table td::before {
    content: attr(data-label);
    flex: 0 0 auto;
    text-align: left;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-3);
    padding-top: 3px;
  }
  .tracker-table td.notes-cell { max-width: none; }
  .tracker-table td.row-actions-cell { justify-content: flex-end; padding-top: 10px; }
  .tracker-table td.row-actions-cell::before { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}