/* DriverMate UK — Distinctive Civic Utility Stylesheet
   Designed for T2 Automations. Non-negotiable: zero emoji icons, full theme toggle support, responsive <= 400px. */

:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --ink: #0f172a;
  --ink-secondary: #475569;
  --ink-muted: #64748b;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --accent: #0284c7;
  --accent-soft: rgba(2, 132, 199, 0.1);
  --amber: #d97706;
  --amber-soft: rgba(217, 119, 6, 0.12);
  --emerald: #059669;
  --emerald-soft: rgba(5, 150, 105, 0.12);
  --crimson: #e11d48;
  --crimson-soft: rgba(225, 29, 72, 0.12);
  --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

:root[data-theme="dark"] {
  --bg: #070d18;
  --surface: #0f172a;
  --surface-alt: #1e293b;
  --ink: #f8fafc;
  --ink-secondary: #cbd5e1;
  --ink-muted: #94a3b8;
  --line: #1e293b;
  --line-strong: #334155;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.15);
  --amber: #fbbf24;
  --amber-soft: rgba(251, 191, 36, 0.15);
  --emerald: #10b981;
  --emerald-soft: rgba(16, 185, 129, 0.15);
  --crimson: #f43f5e;
  --crimson-soft: rgba(244, 63, 94, 0.15);
  --card-shadow: 0 8px 30px -4px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-family: var(--font-sans); background-color: var(--bg); color: var(--ink); line-height: 1.5; -webkit-text-size-adjust: 100%; }
body { min-height: 100vh; padding: 1.25rem 1rem 3.5rem; display: flex; justify-content: center; }
.shell { width: 100%; max-width: 660px; }

/* Header & Meta */
.app-header { margin-bottom: 1.5rem; }
.header-top { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; margin-bottom: 1rem; }
.trust-pill { display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.72rem; font-weight: 600; color: var(--ink-secondary); background: var(--surface); border: 1px solid var(--line); padding: 0.35rem 0.75rem; border-radius: 9999px; }
.pulse-indicator { width: 6px; height: 6px; border-radius: 50%; background: var(--emerald); box-shadow: 0 0 0 2px var(--emerald-soft); }
.theme-toggle { background: var(--surface); border: 1px solid var(--line); color: var(--ink); padding: 0.4rem; border-radius: var(--radius-sm); cursor: pointer; display: inline-flex; align-items: center; justify-content: center; }
.theme-icon { display: block; }
:root[data-theme="light"] .moon-icon { display: block; }
:root[data-theme="light"] .sun-icon { display: none; }
:root[data-theme="dark"] .moon-icon { display: none; }
:root[data-theme="dark"] .sun-icon { display: block; }
.brand-row { display: flex; align-items: center; gap: 0.9rem; }
.brand-badge { background: var(--surface-alt); border: 1px solid var(--line-strong); color: var(--accent); padding: 0.5rem; border-radius: var(--radius-md); display: grid; place-items: center; }
h1 { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.025em; line-height: 1.15; }
.tagline { font-size: 0.8rem; color: var(--ink-muted); margin-top: 0.2rem; }

/* Tabs Navigation */
.tabs-nav { display: flex; gap: 0.4rem; background: var(--surface-alt); border: 1px solid var(--line); padding: 0.3rem; border-radius: var(--radius-md); margin-bottom: 1.25rem; }
.tab-btn { flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 0.45rem; background: transparent; border: none; border-radius: var(--radius-sm); padding: 0.65rem 0.5rem; font-family: var(--font-sans); font-size: 0.82rem; font-weight: 600; color: var(--ink-secondary); cursor: pointer; transition: background 0.15s ease, color 0.15s ease; }
.tab-btn.active { background: var(--surface); color: var(--ink); box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1); border: 1px solid var(--line); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Card Surfaces */
.panel-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--card-shadow); }
.panel-intro { margin-bottom: 1.25rem; }
h2 { font-size: 1.2rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 0.35rem; }
.panel-intro p { font-size: 0.85rem; color: var(--ink-secondary); line-height: 1.5; }

/* Mode Selector (Decode vs Calculate) */
.mode-selector { display: flex; background: var(--surface-alt); border-radius: var(--radius-sm); padding: 0.25rem; margin-bottom: 1.25rem; }
.mode-toggle { flex: 1; background: transparent; border: none; font-family: var(--font-sans); font-size: 0.8rem; font-weight: 600; color: var(--ink-muted); padding: 0.5rem; border-radius: var(--radius-sm); cursor: pointer; }
.mode-toggle.active { background: var(--surface); color: var(--ink); box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08); }

/* Form Controls */
.control-group { margin-bottom: 0.85rem; }
.control-label { display: block; font-size: 0.8rem; font-weight: 600; color: var(--ink); margin-bottom: 0.35rem; }
.input-action-row { display: flex; gap: 0.5rem; }
.code-field { font-family: var(--font-mono); font-size: 1rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; background: var(--surface-alt); border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 0.75rem 0.85rem; color: var(--ink); flex: 1; outline: none; }
.code-field:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.text-field { width: 100%; font-family: var(--font-sans); font-size: 0.88rem; background: var(--surface-alt); border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 0.7rem 0.85rem; color: var(--ink); outline: none; }
.text-field:focus { border-color: var(--accent); }
.field-hint { font-size: 0.75rem; color: var(--ink-muted); margin-top: 0.35rem; }
.action-btn { background: var(--ink); color: var(--bg); border: none; border-radius: var(--radius-sm); padding: 0.75rem 1.25rem; font-family: var(--font-sans); font-size: 0.88rem; font-weight: 700; cursor: pointer; white-space: nowrap; }
.action-btn.full-width { width: 100%; margin-top: 0.5rem; }
.sample-actions { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.75rem; }
.sample-title { font-size: 0.72rem; color: var(--ink-muted); }
.sample-chip { background: var(--surface-alt); border: 1px solid var(--line); color: var(--ink-secondary); font-size: 0.72rem; font-family: var(--font-sans); font-weight: 500; padding: 0.2rem 0.55rem; border-radius: 9999px; cursor: pointer; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }

/* Photocard Visual Simulation */
.decoder-output-container { margin-top: 1.5rem; }
.photocard-sim { background: linear-gradient(145deg, #1e3a5f 0%, #0f243e 100%); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: var(--radius-md); padding: 1.15rem; color: #ffffff; margin-bottom: 1rem; }
.photocard-masthead { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(255, 255, 255, 0.15); padding-bottom: 0.5rem; margin-bottom: 0.85rem; }
.uk-badge { background: #0284c7; color: #fff; font-size: 0.65rem; font-weight: 800; padding: 0.15rem 0.4rem; border-radius: 3px; }
.photocard-headline { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; color: #e2e8f0; }
.photocard-issuer { font-size: 0.72rem; font-weight: 800; color: #fbbf24; }
.photocard-characters { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.35rem; }
.char-segment { display: flex; flex-direction: column; align-items: center; background: rgba(0, 0, 0, 0.35); border: 1px solid rgba(255, 255, 255, 0.15); border-radius: 5px; padding: 0.35rem 0.45rem; }
.char-segment.highlight { border-color: #fbbf24; background: rgba(251, 191, 36, 0.15); }
.char-val { font-family: var(--font-mono); font-size: 1.1rem; font-weight: 800; color: #fff; }
.char-label { font-size: 0.58rem; color: #fbbf24; text-transform: uppercase; margin-top: 0.15rem; }

/* Decoded Table */
.decoded-table { display: flex; flex-direction: column; gap: 0.5rem; }
.decoded-row { display: flex; justify-content: space-between; align-items: center; background: var(--surface-alt); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.65rem 0.85rem; font-size: 0.82rem; }
.row-key { color: var(--ink-secondary); font-weight: 500; }
.row-val { font-family: var(--font-mono); font-weight: 700; color: var(--ink); }

/* Disclosure Card (FAQ) */
.disclosure-card { background: var(--surface-alt); border: 1px solid var(--line); border-radius: var(--radius-md); margin-top: 1.25rem; overflow: hidden; }
.disclosure-trigger { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 0.85rem 1rem; background: transparent; border: none; font-family: var(--font-sans); font-size: 0.85rem; font-weight: 600; color: var(--ink); cursor: pointer; text-align: left; }
.trigger-label { display: flex; align-items: center; gap: 0.5rem; }
.chevron-icon { transition: transform 0.2s var(--ease); }
.disclosure-trigger[aria-expanded="true"] .chevron-icon { transform: rotate(180deg); }
.disclosure-body { padding: 0 1rem 1rem; font-size: 0.82rem; color: var(--ink-secondary); line-height: 1.5; }
.disclosure-body p { margin-bottom: 0.5rem; }
.statute-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.5rem; }
.statute-list li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.5rem 0.75rem; }

/* Official Government Box */
.official-box { margin-top: 1.25rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.official-box h3 { font-size: 0.88rem; font-weight: 700; margin-bottom: 0.65rem; }
.official-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; }
.gov-card-link { background: var(--surface-alt); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.75rem; text-decoration: none; color: var(--ink); display: flex; flex-direction: column; gap: 0.2rem; }
.gov-card-link strong { font-size: 0.82rem; color: var(--accent); }
.gov-card-link span { font-size: 0.72rem; color: var(--ink-muted); }

/* V5C Guard Specifics */
.warning-state { border-bottom: 1px solid var(--line); padding-bottom: 1rem; }
.warning-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.4rem; }
.warning-header h2 { color: var(--crimson); margin-bottom: 0; }
.law-callout { background: var(--crimson-soft); border: 1px solid rgba(225, 29, 72, 0.25); border-radius: var(--radius-md); padding: 0.85rem 1rem; margin: 1.25rem 0; }
.callout-badge { font-size: 0.68rem; font-weight: 800; color: var(--crimson); letter-spacing: 0.06em; margin-bottom: 0.25rem; }
.law-callout p { font-size: 0.82rem; color: var(--ink); line-height: 1.45; }
.checklist-desc { font-size: 0.82rem; color: var(--ink-muted); margin-bottom: 0.85rem; }
.interactive-checklist { display: flex; flex-direction: column; gap: 0.65rem; }
.check-row { display: flex; align-items: flex-start; gap: 0.75rem; background: var(--surface-alt); border: 1px solid var(--line); border-radius: var(--radius-md); padding: 0.85rem 1rem; transition: border-color 0.15s ease, background 0.15s ease; }
.check-row.done { background: var(--emerald-soft); border-color: rgba(5, 150, 105, 0.35); }
.check-row.priority { border-left: 4px solid var(--crimson); }
.task-checkbox { width: 18px; height: 18px; margin-top: 0.15rem; accent-color: var(--emerald); cursor: pointer; }
.task-label { flex: 1; font-size: 0.82rem; cursor: pointer; line-height: 1.4; }
.task-label strong { display: block; color: var(--ink); margin-bottom: 0.15rem; }
.task-label span { font-size: 0.75rem; color: var(--ink-muted); }
.link-gov-btn { font-size: 0.75rem; font-weight: 700; color: var(--accent); text-decoration: none; white-space: nowrap; padding: 0.3rem 0.65rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); }
.status-tag { font-size: 0.7rem; font-weight: 600; color: var(--ink-muted); background: var(--surface); border: 1px solid var(--line); padding: 0.25rem 0.5rem; border-radius: var(--radius-sm); white-space: nowrap; }
.progress-footer { margin-top: 1.25rem; padding-top: 1rem; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 0.4rem; }
#v5c-progress-readout { font-size: 0.78rem; font-weight: 600; color: var(--ink-secondary); }
.progress-track { width: 100%; height: 6px; background: var(--surface-alt); border-radius: 9999px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--emerald); transition: width 0.25s var(--ease); }

/* Expiry Watchdog Specifics */
.status-result-card { background: var(--surface-alt); border: 1px solid var(--line); border-radius: var(--radius-md); padding: 1.15rem; margin-top: 1rem; }
.status-result-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.status-header-tag { font-size: 0.68rem; font-weight: 700; color: var(--ink-muted); letter-spacing: 0.05em; }
.status-date-value { font-size: 1.25rem; font-weight: 800; color: var(--ink); letter-spacing: -0.02em; }
.status-pill { padding: 0.3rem 0.65rem; border-radius: 9999px; font-size: 0.75rem; font-weight: 700; }
.status-pill.valid { background: var(--emerald-soft); color: var(--emerald); border: 1px solid rgba(5, 150, 105, 0.3); }
.status-pill.expiring { background: var(--amber-soft); color: var(--amber); border: 1px solid rgba(217, 119, 6, 0.3); }
.status-pill.expired { background: var(--crimson-soft); color: var(--crimson); border: 1px solid rgba(225, 29, 72, 0.3); }
.status-advice-body { font-size: 0.8rem; color: var(--ink-secondary); line-height: 1.45; }
.portals-box { margin-top: 1.5rem; }
.portals-box h3 { font-size: 0.88rem; font-weight: 700; margin-bottom: 0.65rem; }
.portals-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; }
.portal-card { background: var(--surface-alt); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.75rem; text-decoration: none; color: var(--ink); display: flex; flex-direction: column; gap: 0.2rem; }
.portal-card strong { font-size: 0.82rem; color: var(--accent); }
.portal-card span { font-size: 0.72rem; color: var(--ink-muted); }

/* Cross-App Synergy Cards */
.synergy-card { margin-top: 1.5rem; background: var(--surface-alt); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--radius-md); padding: 1rem 1.15rem; }
.synergy-badge { font-size: 0.65rem; font-weight: 800; color: var(--accent); letter-spacing: 0.05em; margin-bottom: 0.25rem; }
.synergy-card h4 { font-size: 0.88rem; font-weight: 700; color: var(--ink); margin-bottom: 0.25rem; }
.synergy-card p { font-size: 0.78rem; color: var(--ink-secondary); line-height: 1.45; margin-bottom: 0.5rem; }
.synergy-cta { font-size: 0.78rem; font-weight: 700; color: var(--accent); text-decoration: none; }

/* Footer */
.app-footer { margin-top: 2rem; text-align: center; font-size: 0.78rem; color: var(--ink-muted); }
.footer-meta strong { color: var(--ink-secondary); }
.footer-meta p { font-size: 0.72rem; margin-top: 0.4rem; line-height: 1.45; }

/* Media Queries & Responsive Safeguards */
@media (hover: hover) {
  .theme-toggle:hover { border-color: var(--line-strong); }
  .tab-btn:hover:not(.active) { color: var(--ink); }
  .action-btn:hover { filter: brightness(1.15); }
  .sample-chip:hover { border-color: var(--accent); color: var(--accent); }
  .gov-card-link:hover, .portal-card:hover { border-color: var(--line-strong); background: var(--surface); }
  .link-gov-btn:hover { background: var(--accent); color: #fff; }
  .synergy-cta:hover { text-decoration: underline; }
}

@media (max-width: 540px) {
  .form-grid, .official-grid, .portals-grid { grid-template-columns: 1fr; }
  .input-action-row { flex-direction: column; }
  .action-btn { width: 100%; }
}

@media (max-width: 400px) {
  body { padding-inline: 0.65rem; }
  .tab-btn { font-size: 0.75rem; padding: 0.55rem 0.35rem; }
  .tab-btn svg { display: none; }
  .check-row { flex-direction: column; }
  .link-gov-btn { align-self: flex-start; }
}

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