/* ===== Design Tokens ===== */
:root {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #212529;
  --color-text-muted: #6c757d;
  --color-border: #dee2e6;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-danger: #dc2626;
  --color-danger-hover: #b91c1c;
  --color-success: #16a34a;
  --color-warning: #d97706;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.hidden { display: none !important; }

/* ===== Login ===== */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-box {
  background: var(--color-surface);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 360px;
}

.login-box h1 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.auth-toggle {
  margin-top: 1rem;
  font-size: 0.875rem;
  text-align: center;
  color: var(--color-text-muted);
}

/* ===== Forms ===== */
label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--color-text-muted);
}

input, select, textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-family: var(--font);
  background: var(--color-surface);
  color: var(--color-text);
  margin-bottom: 1rem;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea { resize: vertical; min-height: 4rem; }

/* ===== Buttons ===== */
button, .btn, a.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: background-color 0.15s;
}

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

button:hover, .btn-primary:hover {
  background: var(--color-primary-hover);
  text-decoration: none;
}

.btn-secondary {
  background: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: #ced4da;
}

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

.btn-danger:hover {
  background: var(--color-danger-hover);
}

.btn-text {
  background: none;
  color: var(--color-text-muted);
  padding: 0.25rem 0.5rem;
}

.btn-text:hover {
  color: var(--color-text);
  background: rgba(0, 0, 0, 0.05);
}

.btn-sm {
  padding: 0.25rem 0.625rem;
  font-size: 0.8125rem;
}

/* ===== Navigation ===== */
#main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0 1.5rem;
  height: 56px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

.nav-brand {
  font-weight: 700;
  font-size: 1rem;
  white-space: nowrap;
}

.app-version {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* In the nav, tuck the version right up against the brand (counteracts the
   nav's 1.5rem flex gap so it reads as a label on the app name). */
#main-nav .app-version {
  margin-left: -1.1rem;
}

/* On the login screen, center it under the app name. */
.login-box .app-version {
  display: block;
  text-align: center;
  margin-top: -0.5rem;
  margin-bottom: 1rem;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
  flex: 1;
}

.nav-links a {
  display: block;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

.nav-links a:hover {
  background: var(--color-bg);
  color: var(--color-text);
  text-decoration: none;
}

.nav-links a.active {
  background: var(--color-primary);
  color: #fff;
}

/* ===== Main Content ===== */
#app {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* ===== Page Headers ===== */
.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
}

/* ===== Cards ===== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

.card h2 {
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

/* Destructive-action card (settings → delete account) */
.card-danger {
  border-color: color-mix(in srgb, var(--color-danger) 40%, var(--color-border));
}

.card-danger h2 {
  color: var(--color-danger);
}

/* ===== Tables ===== */
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

thead {
  background: var(--color-bg);
}

th, td {
  padding: 0.625rem 0.875rem;
  text-align: left;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

th.sortable {
  cursor: pointer;
  user-select: none;
  position: relative;
  padding-right: 1.25rem;
}

th.sortable:hover { color: var(--color-text); }

th.sortable::after {
  content: '⇅';
  position: absolute;
  right: 0.25rem;
  opacity: 0.3;
  font-size: 0.7rem;
}

th.sort-asc::after { content: '▲'; opacity: 0.7; }
th.sort-desc::after { content: '▼'; opacity: 0.7; }

tbody tr:last-child td { border-bottom: none; }

tbody tr:hover { background: #f1f5f9; }

td.actions {
  white-space: nowrap;
  text-align: right;
}

/* ===== Badges ===== */
.badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-draft { background: #e2e8f0; color: #475569; }
.badge-sent { background: #dbeafe; color: #1e40af; }
.badge-paid { background: #dcfce7; color: #166534; }

/* ===== Dashboard Stats ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card { text-align: center; }

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* ===== Invoice Detail ===== */
.invoice-meta p {
  margin-bottom: 0.35rem;
}

/* ===== Onboarding wizard (#/welcome) ===== */
.onboarding-progress {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1rem 0 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.onboarding-progress__dots {
  display: inline-flex;
  gap: 0.4rem;
}

.onboarding-progress__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-border);
}

.onboarding-progress__dot.active {
  background: var(--color-primary);
}

/* ===== Notices ===== */
.notice-warning,
.notice-success {
  border: 1px solid;
  border-radius: var(--radius);
  color: var(--color-text);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.9375rem;
}

.notice-warning {
  border-color: var(--color-warning);
  background: color-mix(in srgb, var(--color-warning) 8%, var(--color-surface));
}

.notice-success {
  border-color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 8%, var(--color-surface));
}

/* Verify-email banner: sits between the nav and #app, so it matches #app's
   own width and gutters rather than spanning the viewport. The colour class
   is swapped wholesale by app.js (warning → success → error), so everything
   structural is anchored on the id and survives the swap. */
#verify-banner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  max-width: 960px;
  margin: 1.5rem auto -0.5rem;
  padding: 0.75rem 1.5rem;
}

#verify-banner :last-child {
  margin-left: auto;
}

/* ===== Utilities ===== */
.error { color: var(--color-danger); font-size: 0.875rem; }
.text-muted { color: var(--color-text-muted); }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-muted);
}

.empty-state p {
  margin-bottom: 1rem;
}

/* ===== Form Grid ===== */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 1rem;
}

.form-row + .form-row,
.form-row + .form-group {
  margin-top: 1rem;
}

.form-row .form-group { margin-bottom: 0; }

.form-group { margin-bottom: 1rem; }
.form-group label { margin-bottom: 0.25rem; }
.form-group input,
.form-group select,
.form-group textarea { margin-bottom: 0; }

.form-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* ===== Legal Pages & Footer ===== */
/* Standalone pages (terms.html, privacy.html) share this stylesheet; the
   global reset zeroes all margins, so document rhythm is set here. */
.legal-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.legal-content h1 {
  font-size: 1.5rem;
  margin: 1.5rem 0 0.25rem;
}

.legal-content h2 {
  font-size: 1.125rem;
  margin: 2rem 0 0.5rem;
}

.legal-content p { margin: 0.75rem 0; }

.legal-content ul {
  margin: 0.75rem 0;
  padding-left: 1.5rem;
}

.legal-content li { margin: 0.25rem 0; }

.legal-home { font-size: 0.875rem; }

.legal-updated {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.legal-footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

#app-footer {
  text-align: center;
  padding: 1.5rem;
  margin-top: 2rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.consent-note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}