/* Art direction: Dutch government utility → clean, functional, trustworthy
   Palette: Nexus warm beige + teal primary + Dutch-yellow plate accent
   Typography: Inter (body) + Instrument Serif (logo/display only)
   Density: Balanced — focused single-column */

:root, [data-theme="light"] {
--color-bg: #f7f6f2; --color-surface: #f9f8f5; --color-surface-2: #fbfbf9;
--color-surface-offset: #f3f0ec; --color-surface-offset-2: #edeae5;
--color-divider: #dcd9d5; --color-border: #d4d1ca;
--color-text: #28251d; --color-text-muted: #7a7974;
--color-text-faint: #bab9b4; --color-text-inverse: #f9f8f4;
--color-primary: #01696f; --color-primary-hover: #0c4e54;
--color-primary-active: #0f3638; --color-primary-highlight: #cedcd8;
--color-success: #437a22; --color-success-highlight: #d4dfcc;
--color-error: #a12c7b; --color-error-highlight: #e0ced7;
--color-warning: #964219; --color-warning-highlight: #ddcfc6;
--radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.75rem;
--radius-xl: 1rem; --radius-full: 9999px;
--shadow-sm: 0 1px 2px oklch(0.2 0.01 80 / 0.06);
--shadow-md: 0 4px 12px oklch(0.2 0.01 80 / 0.08);
--shadow-lg: 0 12px 32px oklch(0.2 0.01 80 / 0.12);
--transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
--text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
--text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
--text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
--text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
--text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
--text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
--font-display: 'Instrument Serif', Georgia, serif;
--font-body: 'Inter', 'Helvetica Neue', sans-serif;
--font-mono: 'Courier New', Courier, monospace;
--space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
--space-4: 1rem; --space-5: 1.25rem; --space-6: 1.5rem;
--space-8: 2rem; --space-10: 2.5rem; --space-12: 3rem; --space-16: 4rem;
--content-narrow: 640px;
}

[data-theme="dark"] {
--color-bg: #171614; --color-surface: #1c1b19; --color-surface-2: #201f1d;
--color-surface-offset: #1d1c1a; --color-surface-offset-2: #22211f;
--color-divider: #262523; --color-border: #393836;
--color-text: #cdccca; --color-text-muted: #797876;
--color-text-faint: #5a5957; --color-text-inverse: #2b2a28;
--color-primary: #4f98a3; --color-primary-hover: #227f8b;
--color-primary-active: #1a626b; --color-primary-highlight: #313b3b;
--color-success: #6daa45; --color-success-highlight: #3a4435;
--color-error: #d163a7; --color-error-highlight: #4c3d46;
--color-warning: #bb653b; --color-warning-highlight: #564942;
--shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
--shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
--shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #171614; --color-surface: #1c1b19; --color-surface-2: #201f1d;
    --color-surface-offset: #1d1c1a; --color-surface-offset-2: #22211f;
    --color-divider: #262523; --color-border: #393836;
    --color-text: #cdccca; --color-text-muted: #797876;
    --color-text-faint: #5a5957; --color-text-inverse: #2b2a28;
    --color-primary: #4f98a3; --color-primary-hover: #227f8b;
    --color-primary-active: #1a626b; --color-primary-highlight: #313b3b;
    --color-success: #6daa45; --color-success-highlight: #3a4435;
    --color-error: #d163a7; --color-error-highlight: #4c3d46;
    --color-warning: #bb653b; --color-warning-highlight: #564942;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; scroll-behavior: smooth; }
body { min-height: 100dvh; font-family: var(--font-body); font-size: var(--text-base); color: var(--color-text); background-color: var(--color-bg); display: flex; flex-direction: column; align-items: center; transition: background-color var(--transition), color var(--transition); }
img, canvas { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
input, button { transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }

.page-wrap { width: 100%; max-width: var(--content-narrow); padding: var(--space-6) var(--space-4) var(--space-16); display: flex; flex-direction: column; align-items: center; gap: var(--space-6); }

/* Header */
header { width: 100%; display: flex; align-items: center; justify-content: space-between; padding-block: var(--space-3); }
.logo { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; color: var(--color-text); }
.logo-mark { width: 36px; height: 36px; background: var(--color-primary); border-radius: var(--radius-md); display: grid; place-items: center; color: #fff; font-weight: 700; font-size: var(--text-xs); letter-spacing: 0.05em; flex-shrink: 0; }
.logo-text { font-family: var(--font-display); font-size: var(--text-lg); font-style: italic; }
.theme-toggle { width: 40px; height: 40px; border-radius: var(--radius-full); display: grid; place-items: center; color: var(--color-text-muted); border: 1px solid oklch(from var(--color-text) l c h / 0.12); background: var(--color-surface); }
.theme-toggle:hover { color: var(--color-text); border-color: var(--color-primary); }

/* Hero */
.hero { text-align: center; display: flex; flex-direction: column; align-items: center; gap: var(--space-2); }
.hero h1 { font-family: var(--font-display); font-size: var(--text-2xl); font-style: italic; font-weight: 400; line-height: 1.1; }
.hero p { font-size: var(--text-sm); color: var(--color-text-muted); max-width: 46ch; line-height: 1.6; }

/* Card */
.card { width: 100%; background: var(--color-surface); border: 1px solid oklch(from var(--color-text) l c h / 0.10); border-radius: var(--radius-xl); padding: var(--space-6); box-shadow: var(--shadow-md); display: flex; flex-direction: column; gap: var(--space-4); }

/* Tabs */
.tabs { display: flex; gap: var(--space-2); background: var(--color-surface-offset); border-radius: var(--radius-lg); padding: var(--space-1); }
.tab-btn { flex: 1; padding: var(--space-2) var(--space-4); border-radius: calc(var(--radius-lg) - var(--space-1)); font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); display: flex; align-items: center; justify-content: center; gap: var(--space-2); }
.tab-btn:hover { color: var(--color-text); }
.tab-btn.active { background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-sm); font-weight: 600; }
.tab-panel { display: none; flex-direction: column; gap: var(--space-4); }
.tab-panel.active { display: flex; }

/* Text input */
.input-row { display: flex; gap: var(--space-3); align-items: stretch; }
.kenteken-input { flex: 1; padding: var(--space-3) var(--space-5); font-size: var(--text-lg); font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; border: 2px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface-2); color: var(--color-text); text-align: center; font-family: var(--font-body); }
.kenteken-input::placeholder { color: var(--color-text-faint); letter-spacing: 0.08em; font-weight: 400; }
.kenteken-input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.15); }
.btn-primary { padding: var(--space-3) var(--space-6); background: var(--color-primary); color: #fff; border-radius: var(--radius-lg); font-weight: 600; font-size: var(--text-sm); letter-spacing: 0.02em; white-space: nowrap; box-shadow: var(--shadow-sm); display: inline-flex; align-items: center; gap: var(--space-2); }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-primary:active { background: var(--color-primary-active); }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-secondary { padding: var(--space-3) var(--space-5); background: var(--color-surface-offset); color: var(--color-text); border: 1px solid var(--color-border); border-radius: var(--radius-lg); font-weight: 500; font-size: var(--text-sm); white-space: nowrap; }
.btn-secondary:hover { background: var(--color-surface-offset-2); border-color: var(--color-primary); color: var(--color-primary); }

/* API keys — two columns */
.api-keys-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); padding-top: var(--space-2); border-top: 1px solid var(--color-divider); }
.api-key-group { display: flex; flex-direction: column; gap: var(--space-1); }
.field-label { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; }
.api-key-input { width: 100%; padding: var(--space-2) var(--space-3); font-size: var(--text-sm); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface-2); color: var(--color-text); font-family: var(--font-mono); }
.api-key-input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.12); }
.field-hint { font-size: var(--text-xs); color: var(--color-text-faint); line-height: 1.4; }
.field-hint a { color: var(--color-text-muted); text-decoration: underline; }
.field-hint a:hover { color: var(--color-primary); }

/* Drop zone */
.drop-zone { position: relative; border: 2px dashed var(--color-border); border-radius: var(--radius-xl); padding: var(--space-10) var(--space-6); text-align: center; cursor: pointer; transition: border-color var(--transition), background var(--transition); background: var(--color-surface-2); display: flex; flex-direction: column; align-items: center; gap: var(--space-3); }
.drop-zone:hover, .drop-zone.dragover { border-color: var(--color-primary); background: var(--color-primary-highlight); }
.drop-zone input[type="file"] { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.drop-icon { color: var(--color-text-faint); transition: color var(--transition); }
.drop-zone:hover .drop-icon, .drop-zone.dragover .drop-icon { color: var(--color-primary); }
.drop-title { font-size: var(--text-base); font-weight: 600; color: var(--color-text); }
.drop-subtitle { font-size: var(--text-sm); color: var(--color-text-muted); }
.drop-mobile-hint { font-size: var(--text-xs); color: var(--color-text-faint); display: flex; align-items: center; gap: var(--space-2); }

/* Preview */
.preview-area { display: none; flex-direction: column; gap: var(--space-4); }
.preview-area.visible { display: flex; }
.preview-img-wrap { border-radius: var(--radius-lg); overflow: hidden; background: var(--color-surface-offset); border: 1px solid var(--color-border); }
.preview-img-wrap img { width: 100%; max-height: 260px; object-fit: contain; display: block; }
#processCanvas { display: none; }
.preview-actions { display: flex; gap: var(--space-3); align-items: center; }

/* OCR progress */
.ocr-progress-wrap { display: none; flex-direction: column; gap: var(--space-2); }
.ocr-progress-wrap.visible { display: flex; }
.ocr-label { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 500; }
.ocr-bar-track { height: 6px; border-radius: var(--radius-full); background: var(--color-surface-offset); overflow: hidden; }
.ocr-bar-fill { height: 100%; border-radius: var(--radius-full); background: var(--color-primary); width: 0%; transition: width 0.2s ease; }
.ocr-detected { display: none; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); background: var(--color-primary-highlight); border: 1px solid oklch(from var(--color-primary) l c h / 0.2); border-radius: var(--radius-md); }
.ocr-detected.visible { display: flex; }
.ocr-detected-label { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }
.ocr-detected-value { font-weight: 700; font-size: var(--text-base); color: var(--color-primary); letter-spacing: 0.1em; font-family: var(--font-mono); }
.ocr-edit-btn { margin-left: auto; font-size: var(--text-xs); color: var(--color-text-muted); text-decoration: underline; cursor: pointer; white-space: nowrap; background: none; border: none; }
.ocr-edit-btn:hover { color: var(--color-primary); }

/* Status */
.status-msg { display: none; width: 100%; padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); font-size: var(--text-sm); font-weight: 500; }
.status-msg.error { display: block; background: var(--color-error-highlight); color: var(--color-error); border: 1px solid oklch(from var(--color-error) l c h / 0.25); }
.status-msg.loading { display: flex; align-items: center; gap: var(--space-3); background: var(--color-primary-highlight); color: var(--color-primary); border: 1px solid oklch(from var(--color-primary) l c h / 0.2); }
.status-msg.warn { display: block; background: var(--color-warning-highlight); color: var(--color-warning); border: 1px solid oklch(from var(--color-warning) l c h / 0.25); }
.status-msg a { color: inherit; text-decoration: underline; }
.spinner { width: 16px; height: 16px; flex-shrink: 0; border: 2px solid oklch(from var(--color-primary) l c h / 0.25); border-top-color: var(--color-primary); border-radius: 50%; animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Result card */
.result-card { display: none; width: 100%; background: var(--color-surface); border: 1px solid oklch(from var(--color-text) l c h / 0.10); border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-lg); animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
.result-card.visible { display: block; }
@keyframes slideUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
.result-header { background: var(--color-primary); padding: var(--space-5) var(--space-6); display: flex; align-items: center; gap: var(--space-4); }
.plate-display { background: #FFCD00; border: 3px solid #444; border-radius: 5px; padding: var(--space-1) var(--space-5) var(--space-1) calc(var(--space-5) + 22px); font-weight: 900; font-size: var(--text-xl); font-family: var(--font-mono); letter-spacing: 0.1em; color: #000; line-height: 1.2; position: relative; box-shadow: inset 0 0 0 2px #aaa; flex-shrink: 0; }
.plate-display::before { content: 'NL'; position: absolute; left: 0; top: 0; bottom: 0; width: 26px; background: #003DA5; border-radius: 3px 0 0 3px; color: #FFCD00; font-size: 7px; font-weight: 700; display: flex; align-items: center; justify-content: center; writing-mode: vertical-rl; }
.result-title { color: #fff; }
.result-title h2 { font-size: var(--text-lg); font-weight: 600; }
.result-title p { font-size: var(--text-xs); opacity: 0.75; margin-top: var(--space-1); }
.result-grid { display: grid; grid-template-columns: 1fr 1fr; }
.result-item { padding: var(--space-4) var(--space-6); border-bottom: 1px solid var(--color-divider); border-right: 1px solid var(--color-divider); }
.result-item:nth-child(even) { border-right: none; }
.result-item.full-width { grid-column: 1 / -1; border-right: none; }
.result-item:last-child, .result-item:nth-last-child(2):nth-child(odd) { border-bottom: none; }
.result-item-label { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: var(--space-1); }
.result-item-value { font-size: var(--text-base); font-weight: 600; color: var(--color-text); line-height: 1.3; }
.result-item-value.unknown { color: var(--color-text-faint); font-weight: 400; font-style: italic; }
.result-footer { padding: var(--space-4) var(--space-6); border-top: 1px solid var(--color-divider); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3); }
.rdw-link { display: inline-flex; align-items: center; gap: var(--space-2); font-size: var(--text-sm); font-weight: 500; color: var(--color-primary); text-decoration: none; }
.rdw-link:hover { color: var(--color-primary-hover); text-decoration: underline; }
.result-footer-note { font-size: var(--text-xs); color: var(--color-text-faint); }
.badge { display: inline-block; padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; }
.badge-yes { background: var(--color-success-highlight); color: var(--color-success); }
.badge-no  { background: var(--color-error-highlight);   color: var(--color-error); }
.badge-warn{ background: var(--color-warning-highlight); color: var(--color-warning); }

footer { text-align: center; font-size: var(--text-xs); color: var(--color-text-faint); padding-top: var(--space-2); }
footer a { color: var(--color-text-muted); }

/* Responsive */
@media (max-width: 480px) {
  .input-row { flex-direction: column; }
  .result-grid { grid-template-columns: 1fr; }
  .result-item { border-right: none; }
  .plate-display { font-size: var(--text-lg); }
  .tabs { gap: var(--space-1); }
  .tab-btn { padding: var(--space-2) var(--space-3); font-size: var(--text-xs); }
  .api-keys-row { grid-template-columns: 1fr; }
}