/*
  Siri Driving School website: design tokens
  Version 1, 2 October 2026. See 02_Design_Brief.md.
  Contrast ratios were computed on 2 October 2026. Re-check if any value changes.
  Dark theme follows the device setting; data-theme="light" or "dark" on <html> forces one.
*/

:root {
  color-scheme: light dark;

  /* Light theme (contrast against the stated background in brackets) */
  --bg: #ffffff;
  --surface: #f5f7fa;
  --surface-2: #e8eef4;
  --ink: #12202f;               /* 16.5:1 on bg */
  --ink-muted: #445466;         /* 7.8:1 on bg, 7.2:1 on surface */
  --primary: #0b4a6f;           /* 9.5:1 with white text */
  --primary-hover: #083a58;     /* 12.0:1 with white text */
  --on-primary: #ffffff;
  --link: #0b4a6f;              /* 9.5:1 on bg */
  --accent: #f5b800;            /* fill only; ink text on it 9.2:1 */
  --on-accent: #12202f;
  --success: #1b6e45;           /* 6.2:1 on bg */
  --success-bg: #e3f5eb;        /* success-ink on it 7.6:1 */
  --success-ink: #14573a;
  --danger: #b42318;            /* 6.6:1 on bg; white text on it 6.6:1 */
  --danger-bg: #fdecea;         /* danger-ink on it 7.2:1 */
  --danger-ink: #9b1c13;
  --on-danger: #ffffff;
  --warning-bg: #fff4d6;
  --warning-ink: #7a4a00;       /* 6.8:1 on warning-bg */
  --control-border: #6b7a8c;    /* 4.4:1 on bg (needs 3:1) */
  --focus-ring: #0b4a6f;        /* 9.5:1 on bg (needs 3:1) */
  --border-soft: #c9d2dc;       /* decorative dividers only */

  /* Type */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --text-base: 1.125rem;        /* 18px */
  --text-small: 1rem;           /* 16px, never smaller for body or fields */
  --text-h1: 2.25rem;
  --text-h2: 1.75rem;
  --text-h3: 1.375rem;
  --text-h4: 1.25rem;
  --leading-body: 1.55;
  --leading-heading: 1.2;
  --measure: 65ch;

  /* Space, radius, size */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --radius-card: 16px;
  --radius-control: 10px;
  --target-min: 48px;           /* primary actions; never below 24px anywhere */
  --content-max: 1120px;

  /* Focus */
  --focus-width: 3px;
  --focus-offset: 2px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1620;
    --surface: #15202d;
    --surface-2: #1d2b3b;
    --ink: #e8eef5;             /* 15.6:1 on bg */
    --ink-muted: #a9b6c5;       /* 8.8:1 on bg, 8.0:1 on surface */
    --primary: #6bb6e6;         /* fill with dark text 8.2:1 */
    --primary-hover: #8cc7ee;
    --on-primary: #0e1620;
    --link: #6bb6e6;            /* 8.2:1 on bg */
    --accent: #f5b800;
    --on-accent: #12202f;
    --success: #5ccb93;         /* 9.0:1 on bg */
    --success-bg: #12301f;
    --success-ink: #9ae6bf;
    --danger: #ff8a80;          /* 8.0:1 on bg; dark text on it 8.0:1 */
    --danger-bg: #3a1613;
    --danger-ink: #ffb4ad;
    --on-danger: #0e1620;
    --warning-bg: #3a2c0a;
    --warning-ink: #ffd98a;
    --control-border: #7f8fa3;  /* 5.5:1 on bg, 5.0:1 on surface */
    --focus-ring: #6bb6e6;      /* 8.2:1 on bg */
    --border-soft: #2a3a4d;
  }
}

:root[data-theme="dark"] {
  --bg: #0e1620;
  --surface: #15202d;
  --surface-2: #1d2b3b;
  --ink: #e8eef5;
  --ink-muted: #a9b6c5;
  --primary: #6bb6e6;
  --primary-hover: #8cc7ee;
  --on-primary: #0e1620;
  --link: #6bb6e6;
  --accent: #f5b800;
  --on-accent: #12202f;
  --success: #5ccb93;
  --success-bg: #12301f;
  --success-ink: #9ae6bf;
  --danger: #ff8a80;
  --danger-bg: #3a1613;
  --danger-ink: #ffb4ad;
  --on-danger: #0e1620;
  --warning-bg: #3a2c0a;
  --warning-ink: #ffd98a;
  --control-border: #7f8fa3;
  --focus-ring: #6bb6e6;
  --border-soft: #2a3a4d;
}

/* Base rules every page needs */
html { font-family: var(--font-sans); font-size: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}
:focus-visible {
  outline: var(--focus-width) solid var(--focus-ring);
  outline-offset: var(--focus-offset);
}
input, select, textarea, button { font: inherit; }
input, select, textarea { font-size: var(--text-small); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* Site styles. Colours, type and spacing come from tokens.css above. */
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; }
img { max-width: 100%; height: auto; }
a { color: var(--link); text-underline-offset: 3px; }
a:hover { color: var(--primary-hover); }

.wrap { width: 100%; max-width: var(--content-max); margin: 0 auto; padding-inline: var(--space-3); }
.skip { position: absolute; left: var(--space-3); top: -100px; background: var(--primary); color: var(--on-primary); padding: var(--space-2) var(--space-3); border-radius: var(--radius-control); z-index: 10; }
.skip:focus { top: var(--space-2); }

h1 { font-size: var(--text-h1); line-height: var(--leading-heading); margin: var(--space-4) 0 var(--space-3); color: var(--link); }
h2 { font-size: var(--text-h2); line-height: var(--leading-heading); margin: var(--space-5) 0 var(--space-2); }
h3 { font-size: var(--text-h3); line-height: var(--leading-heading); margin: 0 0 var(--space-2); }
p, li { max-width: var(--measure); }
main { padding-bottom: var(--space-5); }
.lead { font-size: 1.375rem; line-height: 1.4; }
.small { font-size: var(--text-small); color: var(--ink-muted); }

/* Header */
.site-header { border-bottom: 1px solid var(--border-soft); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); padding-block: var(--space-3) var(--space-2); flex-wrap: wrap; }
.brand { display: inline-block; line-height: 0; }
.brand img { display: block; width: 220px; max-width: 100%; height: auto; }
@media (min-width: 600px) { .brand img { width: 240px; } }
.nav { list-style: none; margin: 0; padding: 0 0 var(--space-2); display: flex; flex-wrap: wrap; gap: 0 var(--space-3); }
.nav li { max-width: none; }
.nav a { display: inline-flex; align-items: center; min-height: var(--target-min); padding-inline: 2px; color: var(--ink); font-weight: 600; text-decoration: none; border-bottom: 3px solid transparent; }
.nav a:hover { border-bottom-color: var(--accent); }
.nav a[aria-current="page"] { border-bottom-color: var(--primary); color: var(--link); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: var(--target-min); min-width: var(--target-min); padding: var(--space-2) var(--space-4); border-radius: var(--radius-control); font-weight: 700; text-decoration: none; border: 2px solid var(--primary); text-align: center; }
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { background: var(--primary-hover); color: var(--on-primary); }
.btn-secondary { background: transparent; color: var(--link); }
.btn-secondary:hover { background: var(--surface-2); color: var(--link); }
.btn-small { padding: var(--space-1) var(--space-3); }
.btn-static { cursor: default; border-style: dashed; background: transparent; color: var(--ink-muted); border-color: var(--control-border); }
.btn-primary.btn-static { background: var(--surface); }
.actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin: var(--space-3) 0; max-width: none; }

/* Cards */
.cards { list-style: none; padding: 0; margin: var(--space-3) 0; display: grid; gap: var(--space-3); grid-template-columns: 1fr; }
.card { background: var(--surface); border-radius: var(--radius-card); padding: var(--space-4); max-width: none; display: flex; flex-direction: column; }
.card p { margin: 0 0 var(--space-2); }
.price { font-variant-numeric: tabular-nums; }
.amount { font-size: var(--text-h2); font-weight: 700; color: var(--link); }
/* preview marker inside a price */
.amount .tbc { font-size: var(--text-small); white-space: normal; }
.unit { color: var(--ink-muted); }
.card .btn { align-self: flex-start; }

/* Steps */
.steps { padding-left: 0; list-style: none; counter-reset: step; display: grid; gap: var(--space-3); }
.steps > li { counter-increment: step; position: relative; padding-left: 56px; min-height: 40px; max-width: var(--measure); }
.steps > li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 40px; height: 40px; border-radius: 50%; background: var(--accent); color: var(--on-accent); font-weight: 700; display: flex; align-items: center; justify-content: center; }
.steps h2 { font-size: var(--text-h4); margin: 0 0 var(--space-1); }
.steps p { margin: 0; }
ul.plain { padding-left: var(--space-4); }
ul.plain li { margin-bottom: var(--space-2); }

/* Notices */
.notice { background: var(--warning-bg); color: var(--warning-ink); border-radius: var(--radius-control); padding: var(--space-3); max-width: none; }
.notice a { color: inherit; font-weight: 700; }
.preview-banner { background: var(--warning-bg); color: var(--warning-ink); margin: 0; padding: var(--space-2) var(--space-3); text-align: center; max-width: none; border-bottom: 2px solid var(--accent); }
.tbc { background: var(--warning-bg); color: var(--warning-ink); border: 1px dashed var(--warning-ink); border-radius: 6px; padding: 0 6px; font-weight: 600; white-space: nowrap; }

/* FAQ */
.faq { border-bottom: 1px solid var(--border-soft); }
.faq summary { cursor: pointer; min-height: var(--target-min); display: flex; align-items: center; padding: var(--space-2) 0; list-style-position: inside; }
.faq summary h2 { display: inline; font-size: var(--text-h4); margin: 0; }
.faq p { margin: 0 0 var(--space-3); }

/* Contact, credit */
.contact { display: grid; grid-template-columns: max-content 1fr; gap: var(--space-2) var(--space-4); }
.contact dt { font-weight: 700; }
.contact dd { margin: 0; }
.credit-row { display: flex; align-items: center; gap: var(--space-3); }
/* Swar Nepal logos are navy and red, so they sit on a white plate in both light and dark mode. */
.logo-plate { display: inline-flex; align-items: center; background: #fff; border-radius: 8px; padding: 6px 8px; line-height: 0; }
.logo-plate img { display: block; }

/* Footer */
.site-footer { background: var(--surface); margin-top: var(--space-5); padding-block: var(--space-4); border-top: 1px solid var(--border-soft); }
.foot p { margin: 0 0 var(--space-2); }
.foot a { display: inline-block; padding-block: 8px; }
.foot-brand { display: flex; align-items: center; gap: var(--space-3); }
.foot-name { font-weight: 700; }
.credit { color: var(--ink-muted); font-size: var(--text-small); display: flex; align-items: center; gap: var(--space-2); }

@media (min-width: 600px) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  h1 { font-size: 2.75rem; }
}
@media (min-width: 1100px) {
  .cards { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.reviews { background: var(--surface); border-left: 5px solid var(--accent); border-radius: var(--radius-control); padding: var(--space-3); max-width: none; }

.badge { align-self: flex-start; background: var(--accent); color: var(--on-accent); font-weight: 800; border-radius: 999px; padding: 2px 12px; margin: 0 0 var(--space-2); max-width: none; }
.cards-single { grid-template-columns: 1fr; max-width: 28rem; }
@media (min-width: 600px) { .cards-single { grid-template-columns: 1fr; } }
@media (min-width: 1100px) { .cards { grid-template-columns: repeat(4, minmax(0, 1fr)); } .cards-single { grid-template-columns: 1fr; } }