/*
 * Reminder Bot — landing page + admin.
 * Tokens follow the validated data-viz palette (series #2a78d6 light / #3987e5 dark).
 * Light is the default; dark redefines tokens only.
 */

:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-raised: #ffffff;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #6d6b66;
  --gridline: #e1e0d9;
  --baseline: #c3c2b7;
  --border: rgba(11, 11, 11, 0.1);
  --accent: #256abf;          /* link/text accent: 5.1:1 on the page */
  --accent-strong: #184f95;
  --accent-wash: #cde2fb;
  --button-background: #256abf; /* white label 5.2:1 in both modes */
  --button-background-hover: #1c5cab;
  --on-accent: #ffffff;
  --series-1: #2a78d6;
  --status-good: #0ca30c;
  --status-warning: #fab219;
  --status-critical: #d03b3b;
  --status-info: #2a78d6;
  --danger-text: #d03b3b;     /* 4.8:1 on raised surface */
  --status-muted: #898781;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(11, 11, 11, 0.06), 0 4px 16px rgba(11, 11, 11, 0.04);
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Tahoma, "Vazirmatn", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-raised: #222220;
    --text-primary: #f0efec;
    --text-secondary: #c3c2b7;
    --text-muted: #a3a29b;
    --gridline: #2c2c2a;
    --baseline: #383835;
    --border: rgba(255, 255, 255, 0.1);
    --accent: #3987e5;        /* 5.3:1 on the dark page */
    --accent-strong: #86b6ef;
    --accent-wash: #104281;
    --series-1: #3987e5;
    --status-info: #3987e5;
    --danger-text: #e66767;   /* 4.9:1 on dark raised surface */
    --shadow: none;
  }
}

/* ---------- Base ---------- */

*,
*::before,
*::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3 { line-height: 1.2; margin-block: 0 0.5em; text-wrap: balance; }
h1 { font-size: clamp(1.75rem, 1.2rem + 2.4vw, 3rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.3rem, 1.1rem + 0.8vw, 1.75rem); letter-spacing: -0.01em; }
h3 { font-size: 1.05rem; }
p { margin-block: 0 1em; text-wrap: pretty; }

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: var(--accent-strong); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.95em; }

.page-width {
  inline-size: 100%;
  max-inline-size: 72rem;
  margin-inline: auto;
  padding-inline: max(16px, 4vw);
}

.section { padding-block: clamp(1.5rem, 1rem + 2vw, 3rem); }
.muted { color: var(--text-muted); }
.hint { color: var(--text-secondary); font-size: 0.9rem; }
.tabular, .numeric { font-variant-numeric: tabular-nums; }
.numeric { text-align: end; }

.visually-hidden {
  position: absolute !important;
  inline-size: 1px; block-size: 1px;
  overflow: hidden; clip-path: inset(50%); white-space: nowrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 1.05rem;
}
.brand:hover { color: var(--text-primary); }
.brand-mark { inline-size: 28px; block-size: 28px; border-radius: 7px; flex: none; }
.hero-mark { display: block; inline-size: clamp(64px, 10vw, 88px); block-size: auto; margin-block-end: 1.5rem; border-radius: 20px; box-shadow: var(--shadow); }

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.35rem 0.6rem;
  border-radius: 8px;
}
.nav-link:hover, .nav-link.is-current { color: var(--text-primary); background: var(--surface-raised); }

.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-block-size: 44px;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
}
.button-primary { background: var(--button-background); color: var(--on-accent); }
.button-primary:hover { background: var(--button-background-hover); color: var(--on-accent); }
.button-secondary { background: var(--surface-raised); color: var(--text-primary); border-color: var(--border); }
.button-secondary:hover { color: var(--text-primary); border-color: var(--baseline); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

/* ---------- Public landing ---------- */

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--page) 88%, transparent);
  backdrop-filter: blur(8px);
  border-block-end: 1px solid var(--border);
}
.site-header-inner, .admin-header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  padding-block: 0.75rem;
}
.site-nav { display: flex; gap: 0.25rem; margin-inline-end: auto; }
.language-switch { display: flex; gap: 0.25rem; }
.language-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.language-link.is-current { background: var(--text-primary); color: var(--page); border-color: var(--text-primary); }

.hero { padding-block: clamp(3rem, 2rem + 6vw, 6.5rem) clamp(2rem, 1rem + 3vw, 4rem); }
.hero h1 { max-inline-size: 18ch; }
.hero-text { font-size: clamp(1.05rem, 1rem + 0.4vw, 1.3rem); color: var(--text-secondary); max-inline-size: 42rem; margin-block-end: 1.75rem; }

.steps {
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: 1rem;
  counter-reset: step;
}
.step-card, .feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.step-card { counter-increment: step; }
.step-card::before {
  content: counter(step);
  display: grid;
  place-items: center;
  inline-size: 2rem; block-size: 2rem;
  border-radius: 50%;
  background: var(--accent-wash);
  color: var(--text-primary);
  font-weight: 700;
  margin-block-end: 0.75rem;
}
.step-card p, .feature-card p { color: var(--text-secondary); margin: 0; }

.example-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1rem;
}
.example-group h3 { font-size: 0.875rem; color: var(--text-secondary); font-weight: 600; }
.chips, .filter-chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  display: inline-block;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 0.9rem;
  text-decoration: none;
}
a.chip:hover { border-color: var(--baseline); color: var(--text-primary); }
.chip.is-current { background: var(--text-primary); color: var(--page); border-color: var(--text-primary); }

.feature-grid {
  list-style: none; margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  gap: 1rem;
}

.command-list { margin: 0; display: grid; gap: 0.25rem; max-inline-size: 40rem; }
.command-row {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 1rem;
  padding-block: 0.5rem;
  border-block-end: 1px solid var(--border);
}
.command-row dt { font-weight: 600; }
.command-row dd { margin: 0; color: var(--text-secondary); }

.site-footer { padding-block: 2rem; color: var(--text-muted); font-size: 0.875rem; border-block-start: 1px solid var(--border); }

/* ---------- Stat tiles ---------- */

.kpi-row {
  margin: 0 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr));
  gap: 1rem;
}
.stat-tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow);
}
.stat-label { color: var(--text-secondary); font-size: 0.875rem; }
.stat-value { margin: 0.25rem 0 0; font-size: clamp(1.75rem, 1.4rem + 1.2vw, 2.4rem); font-weight: 700; letter-spacing: -0.02em; }
.stat-note { margin: 0; color: var(--text-muted); font-size: 0.8rem; }

/* ---------- Column chart (single series) ---------- */

.chart {
  margin: 0 0 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.chart-title { font-weight: 600; margin-block-end: 1rem; }
/* Time runs left to right in every language, including RTL pages. */
.chart-body, .chart-x-axis { direction: ltr; }
.chart-body { display: flex; gap: 0.5rem; }
.chart-y-axis {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  block-size: 12rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  text-align: end;
  min-inline-size: 2ch;
  margin-block: -0.5em;
}
.chart-plot {
  position: relative;
  flex: 1;
  block-size: 12rem;
  border-block-end: 1px solid var(--baseline);
}
.chart-gridline { position: absolute; inset-inline: 0; border-block-start: 1px solid var(--gridline); }
.chart-gridline-top { inset-block-start: 0; }
.chart-gridline-middle { inset-block-start: 50%; }
.chart-columns {
  position: relative;
  list-style: none;
  margin: 0; padding: 0;
  block-size: 100%;
  display: grid;
  grid-template-columns: repeat(var(--column-count), 1fr);
  gap: 2px; /* surface gap between adjacent bars */
}
.chart-column {
  position: relative;
  display: flex;
  align-items: flex-end;
  block-size: 100%;
  cursor: default;
  border-radius: 4px 4px 0 0;
}
.chart-column:hover, .chart-column:focus-visible { background: color-mix(in srgb, var(--series-1) 8%, transparent); }
.chart-fill {
  inline-size: 100%;
  max-inline-size: 18px;
  margin-inline: auto;
  block-size: calc(var(--value) * 100%);
  background: var(--series-1);
  border-radius: 4px 4px 0 0;
}
.chart-tooltip {
  position: absolute;
  inset-block-end: calc(100% + 6px);
  inset-inline-start: 50%;
  translate: -50% 0;
  z-index: 2;
  white-space: nowrap;
  background: var(--text-primary);
  color: var(--page);
  font-size: 0.8rem;
  padding: 0.3rem 0.55rem;
  border-radius: 6px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms ease;
}
.chart-column.align-start .chart-tooltip { inset-inline-start: 0; translate: none; }
.chart-column.align-end .chart-tooltip { inset-inline-start: auto; inset-inline-end: 0; translate: none; }
.chart-column:hover .chart-tooltip, .chart-column:focus-visible .chart-tooltip { opacity: 1; }
.chart-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.chart-x-axis {
  display: flex;
  justify-content: space-between;
  padding-inline-start: calc(2ch + 0.5rem);
  margin-block-start: 0.4rem;
  color: var(--text-muted);
  font-size: 0.75rem;
}
.chart-table { margin-block-start: 1rem; }
.chart-table summary { cursor: pointer; color: var(--accent); font-size: 0.9rem; }
.chart-table .table-wrapper { margin-block-start: 0.75rem; max-block-size: 18rem; }

@media (prefers-reduced-motion: reduce) {
  .chart-tooltip { transition: none; }
}

/* ---------- Tables ---------- */

.table-wrapper {
  overflow: auto;
  max-inline-size: 100%;
  container-type: inline-size;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.table-wrapper table, .compact-table { inline-size: 100%; border-collapse: separate; border-spacing: 0; font-size: 0.9rem; }
.table-wrapper thead th {
  position: sticky;
  inset-block-start: 0;
  z-index: 1;
  background: var(--surface-raised);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.8rem;
  text-align: start;
  white-space: nowrap;
}
.table-wrapper th, .table-wrapper td { padding: 0.6rem 0.75rem; border-block-end: 1px solid var(--border); vertical-align: top; }
.table-wrapper tbody th { text-align: start; font-weight: 500; }
.table-wrapper thead th.numeric { text-align: end; }
.table-wrapper tbody tr:last-child > * { border-block-end: 0; }
.table-wrapper tbody tr:hover > * { background: color-mix(in srgb, var(--accent) 5%, var(--surface)); }
.data-table .reminder-text { min-inline-size: 16rem; max-inline-size: 32rem; overflow-wrap: anywhere; }
.empty-row { text-align: center; color: var(--text-muted); padding-block: 2rem !important; }

.compact-table th, .compact-table td { padding: 0.45rem 0; border-block-end: 1px solid var(--border); text-align: start; font-weight: 400; }
.compact-table td.numeric { text-align: end; }
.compact-table tr:last-child > * { border-block-end: 0; }

/* Stacked "card" rows when the table itself is narrow. */
@container (width < 640px) {
  .data-table, .data-table tbody, .data-table tr, .data-table th, .data-table td { display: block; }
  .data-table thead { display: none; }
  .data-table tr { padding: 0.75rem; border-block-end: 1px solid var(--border); }
  .data-table tbody th, .data-table td { border: 0; padding: 0.15rem 0; text-align: start; }
  .data-table tbody th { font-weight: 600; margin-block-end: 0.35rem; }
  .data-table td[data-label]::before {
    content: attr(data-label) ": ";
    color: var(--text-muted);
    font-size: 0.8rem;
  }
  .data-table .reminder-text { min-inline-size: 0; }
  .data-table tbody tr:hover > * { background: none; }
  .data-table tbody tr:hover { background: color-mix(in srgb, var(--accent) 5%, var(--surface)); }
  .data-table .empty-row::before { content: none; }
}

/* ---------- Status badges (icon + label; color is a secondary cue) ---------- */

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
  padding: 0.1rem 0.55rem 0.1rem 0.45rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-raised);
  vertical-align: middle;
}
.status-badge::before { content: ""; inline-size: 0.5rem; block-size: 0.5rem; border-radius: 50%; background: var(--tone); }
.tone-good { --tone: var(--status-good); }
.tone-warning { --tone: var(--status-warning); }
.tone-critical { --tone: var(--status-critical); }
.tone-info { --tone: var(--status-info); }
.tone-muted { --tone: var(--status-muted); }
h1 .status-badge { font-size: 0.85rem; }

/* ---------- Admin ---------- */

.admin-header { background: var(--surface); border-block-end: 1px solid var(--border); }
.admin-header nav { display: flex; flex-wrap: wrap; gap: 0.25rem; margin-inline-start: auto; }
.admin-main { padding-block: 2rem 4rem; }
.admin-main .section { padding-block: 1rem; }
.admin-main .kpi-row { margin-block-end: 1rem; }
.admin-main > h1 { font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); }
.section-heading { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 0.5rem; }
.breadcrumb { margin-block-end: 0.5rem; font-size: 0.9rem; }

.breakdown-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1rem;
}
.breakdown-grid h2 { font-size: 1rem; }
.health-card { margin-block-end: 1rem; }
.health-card h2 { font-size: 1.1rem; }
.health-card .compact-table td { padding-inline-start: 1rem; vertical-align: middle; }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75rem;
  margin-block-end: 1rem;
}
.field { display: grid; gap: 0.25rem; font-size: 0.85rem; color: var(--text-secondary); }
.field input, .field select {
  font: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--surface-raised);
  border: 1px solid var(--baseline);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
  min-block-size: 44px;
  min-inline-size: min(100%, 16rem);
}
.filter-bar .button-primary, .filter-bar .button-secondary { border-radius: 8px; }
.filter-chips { margin-block-end: 1rem; }

.profile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr));
  gap: 1rem 1.5rem;
  margin: 1rem 0 0;
}
.profile-grid dt { color: var(--text-secondary); font-size: 0.8rem; }
.profile-grid dd { margin: 0.15rem 0 0; }

.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-block-start: 1rem;
  font-size: 0.9rem;
}
.pagination-links { display: flex; align-items: center; gap: 0.75rem; }
.pagination .button-secondary { min-block-size: 36px; padding-block: 0.3rem; }

/* ---------- Admin forms, flashes, settings ---------- */

.flash {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--tone);
  background: var(--surface);
  margin-block-end: 1.25rem;
}
.flash-notice { --tone: var(--status-good); }
.flash-alert { --tone: var(--status-critical); }

.settings-form { display: grid; gap: 1.25rem; max-inline-size: 40rem; margin-block-end: 1.5rem; }
.settings-form .field input { max-inline-size: 12rem; }
.settings-form .hint { margin: 0; }
.field.has-error input { border-color: var(--status-critical); }
.field.has-error .hint { color: var(--danger-text); }
.toggle-field { display: grid; grid-template-columns: auto 1fr; gap: 0.25rem 0.6rem; align-items: center; }
.toggle-field label { font-weight: 600; }
.toggle-field .hint { grid-column: 2; }
.toggle-field input, .checkbox-field input { inline-size: 1.15rem; block-size: 1.15rem; accent-color: var(--accent); }
.form-actions { display: flex; gap: 0.75rem; }

.stacked-form { display: grid; gap: 0.75rem; justify-items: start; }
.checkbox-field { display: flex; gap: 0.5rem; align-items: flex-start; font-size: 0.9rem; }

.button-danger {
  display: inline-flex; align-items: center; justify-content: center;
  min-block-size: 44px; padding: 0.6rem 1.2rem; border-radius: 999px;
  font: inherit; font-weight: 600; cursor: pointer;
  background: var(--surface-raised); color: var(--danger-text);
  border: 1px solid var(--danger-text);
}
.button-danger:hover { background: color-mix(in srgb, var(--danger-text) 10%, var(--surface-raised)); }
.danger-zone { border-color: color-mix(in srgb, var(--status-critical) 35%, var(--border)); }
button[disabled] { opacity: 0.5; cursor: not-allowed; }

.button-small { min-block-size: 32px; padding: 0.25rem 0.8rem; font-size: 0.85rem; margin-inline-start: 0.5rem; }
.inline-form { display: inline; }
.break-anywhere { overflow-wrap: anywhere; }
h2 .status-badge { font-size: 0.8rem; margin-inline-start: 0.5rem; }

/* ---------- Legal pages ---------- */

.legal-page { padding-block: clamp(2rem, 1.5rem + 2vw, 3.5rem) 4rem; }
.legal-article { max-inline-size: 46rem; }
.legal-article h1 { font-size: clamp(1.75rem, 1.4rem + 1.5vw, 2.5rem); margin-block-end: 0.25rem; }
.legal-article h2 { font-size: 1.25rem; margin-block: 2.25rem 0.6rem; }
.legal-article h3 { font-size: 1rem; margin-block: 1.25rem 0.4rem; }
.legal-article ul { padding-inline-start: 1.25rem; margin-block: 0 1em; }
.legal-article li { margin-block-end: 0.35rem; }
.legal-article address { font-style: normal; margin-block-end: 1em; line-height: 1.7; }
.legal-meta { color: var(--text-muted); font-size: 0.9rem; margin-block-end: 1.75rem; }
.legal-summary {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem 0.25rem;
  box-shadow: var(--shadow);
}
.legal-summary h2 { margin-block-start: 0; font-size: 1.05rem; }
.legal-notice {
  max-inline-size: 46rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  border-inline-start: 4px solid var(--status-info);
  background: var(--surface);
}
.site-footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.5rem 1.5rem; }
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a { color: var(--text-secondary); }