/* DF Automotive x Apple design system
   Brand voice: DF dark photography + charcoal tiles
   Interaction: Apple Action Blue pills, tight display type, tile rhythm */

:root {
    --color-primary: #0066cc;
    --color-primary-focus: #0071e3;
    --color-primary-on-dark: #2997ff;
    --color-ink: #1d1d1f;
    --color-body: #1d1d1f;
    --color-body-on-dark: #ffffff;
    --color-body-muted: #cccccc;
    --color-ink-muted-80: #333333;
    --color-ink-muted-48: #7a7a7a;
    --color-divider-soft: #f0f0f0;
    --color-hairline: #e0e0e0;
    --color-canvas: #ffffff;
    --color-canvas-parchment: #f5f5f7;
    --color-surface-pearl: #fafafc;
    --color-surface-tile-1: #272729;
    --color-surface-tile-2: #2a2a2c;
    --color-surface-tile-3: #252527;
    --color-surface-black: #000000;
    --color-df-dark: #0d0a0a;
    --color-df-red: #a90707;
    --color-ok: #198754;
    --color-danger: #c44536;
    --color-warn: #9a5b1e;

    --font-display: "Manrope", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-text: "Manrope", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    --radius-sm: 8px;
    --radius-md: 11px;
    --radius-lg: 18px;
    --radius-pill: 9999px;

    --space-xs: 8px;
    --space-sm: 12px;
    --space-md: 17px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;
    --space-section: 80px;

    --shadow-product: rgba(0, 0, 0, 0.22) 3px 5px 30px 0;
    --nav-h: 52px;

    /* legacy aliases used by existing markup */
    --sd-bg: var(--color-canvas-parchment);
    --sd-surface: var(--color-canvas);
    --sd-ink: var(--color-ink);
    --sd-muted: var(--color-ink-muted-48);
    --sd-accent: var(--color-primary);
    --sd-accent-dark: #0055aa;
    --sd-ok: var(--color-ok);
    --sd-danger: var(--color-danger);
    --sd-radius: var(--radius-lg);
    --sd-shadow: none;
    --sd-font: var(--font-text);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-text);
    font-size: 17px;
    font-weight: 400;
    line-height: 1.47;
    letter-spacing: -0.374px;
    color: var(--color-ink);
    background: var(--color-canvas);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.admin-body {
    background: var(--color-canvas-parchment);
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: 1rem;
    z-index: 1000;
    background: #fff;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
}

/* ---------- Global nav (DF dark + Apple slim) ---------- */
.df-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    color: var(--color-body-on-dark);
}

.df-nav__inner {
    width: min(1120px, 100%);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
}

.df-nav__brand {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
    text-decoration: none;
    color: #fff;
}

.df-nav__mark {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 0.04em;
    font-style: italic;
}

.df-nav__sub {
    font-size: 10px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    opacity: 0.75;
    font-weight: 400;
}

.df-nav__links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.df-nav__links a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 400;
}

.df-nav__links a:active {
    transform: scale(0.95);
}

/* ---------- Tiles / one-pager sections ---------- */
.tile {
    width: 100%;
    padding: var(--space-section) var(--space-lg);
}

.tile--hero {
    min-height: calc(100vh - var(--nav-h));
    display: flex;
    align-items: center;
    background:
        linear-gradient(120deg, rgba(13, 10, 10, 0.88) 0%, rgba(39, 39, 41, 0.72) 55%, rgba(13, 10, 10, 0.9) 100%),
        radial-gradient(ellipse at 70% 40%, rgba(0, 102, 204, 0.18), transparent 50%),
        var(--color-df-dark);
    color: var(--color-body-on-dark);
    position: relative;
    overflow: hidden;
}

.tile--dark {
    background: var(--color-surface-tile-1);
    color: var(--color-body-on-dark);
}

.tile--dark-2 {
    background: var(--color-surface-tile-2);
    color: var(--color-body-on-dark);
}

.tile--light {
    background: var(--color-canvas);
    color: var(--color-ink);
}

.tile--parchment {
    background: var(--color-canvas-parchment);
    color: var(--color-ink);
}

.tile__inner {
    width: min(980px, 100%);
    margin: 0 auto;
    text-align: center;
}

.tile__inner--wide {
    width: min(1120px, 100%);
}

.tile__inner--left {
    text-align: left;
}

.eyebrow {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--color-primary-on-dark);
    margin: 0 0 var(--space-md);
}

.tile--light .eyebrow,
.tile--parchment .eyebrow {
    color: var(--color-primary);
}

.hero-display {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 600;
    line-height: 1.07;
    letter-spacing: -0.28px;
    margin: 0 0 var(--space-md);
}

.display-lg {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 600;
    line-height: 1.1;
    margin: 0 0 var(--space-sm);
}

.lead {
    font-size: clamp(1.125rem, 2.4vw, 1.75rem);
    font-weight: 400;
    line-height: 1.25;
    margin: 0 0 var(--space-xl);
    color: var(--color-body-muted);
    max-width: 34em;
    margin-left: auto;
    margin-right: auto;
}

.tile--light .lead,
.tile--parchment .lead {
    color: var(--color-ink-muted-48);
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-top: var(--space-lg);
}

/* ---------- Buttons (Apple pill grammar) ---------- */
.btn-sd,
.btn-apple {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    border: 1px solid var(--color-primary);
    color: #fff;
    font-family: var(--font-text);
    font-size: 17px;
    font-weight: 400;
    line-height: 1;
    min-height: 44px;
    padding: 11px 22px;
    border-radius: var(--radius-pill);
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.12s ease;
}

.btn-sd:hover,
.btn-sd:focus,
.btn-apple:hover,
.btn-apple:focus {
    background: var(--color-primary-focus);
    border-color: var(--color-primary-focus);
    color: #fff;
}

.btn-sd:active,
.btn-apple:active {
    transform: scale(0.95);
}

.btn-sd:focus-visible,
.btn-apple:focus-visible {
    outline: 2px solid var(--color-primary-focus);
    outline-offset: 2px;
}

.btn-sd-secondary,
.btn-apple-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    font-size: 17px;
    font-weight: 400;
    min-height: 44px;
    padding: 11px 22px;
    border-radius: var(--radius-pill);
    text-decoration: none;
    cursor: pointer;
}

.tile--hero .btn-apple-ghost,
.tile--dark .btn-apple-ghost,
.tile--dark-2 .btn-apple-ghost {
    border-color: rgba(255, 255, 255, 0.55);
    color: #fff;
}

.btn-sd-secondary:active,
.btn-apple-ghost:active {
    transform: scale(0.95);
}

.w-100 { width: 100%; }

/* ---------- Forms ---------- */
.form-panel {
    background: var(--color-canvas);
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: left;
    max-width: 440px;
    margin: 0 auto;
}

.form-label {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: -0.224px;
    margin-bottom: 6px;
    color: var(--color-ink);
}

.form-control,
.form-select {
    min-height: 44px;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(0, 0, 0, 0.08);
    padding: 12px 20px;
    font-size: 17px;
    letter-spacing: -0.374px;
    background: var(--color-canvas);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary-focus);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.2);
    outline: none;
}

/* ---------- 3D stage ---------- */
.stage-3d {
    width: min(520px, 100%);
    margin: var(--space-xl) auto 0;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-lg);
    background:
        radial-gradient(circle at 50% 40%, rgba(255, 255, 255, 0.08), transparent 55%),
        var(--color-surface-tile-3);
    display: grid;
    place-items: center;
    box-shadow: var(--shadow-product);
    position: relative;
    overflow: hidden;
}

.stage-3d model-viewer,
.stage-3d img,
.stage-3d__img {
    width: 100%;
    height: 100%;
    max-width: 85%;
    object-fit: contain;
    filter: drop-shadow(var(--shadow-product));
}

.stage-3d__hint {
    position: absolute;
    inset: auto 16px 16px;
    font-size: 12px;
    color: var(--color-body-muted);
    text-align: center;
}

.stage-3d__placeholder {
    color: var(--color-body-muted);
    font-size: 14px;
    padding: 24px;
    text-align: center;
}

/* ---------- Feature grid ---------- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xxl);
    text-align: left;
}

.feature-card {
    background: var(--color-canvas);
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.feature-card h3 {
    font-size: 17px;
    font-weight: 600;
    letter-spacing: -0.374px;
    margin: 0 0 8px;
}

.feature-card p {
    margin: 0;
    font-size: 14px;
    line-height: 1.43;
    color: var(--color-ink-muted-48);
}

.feature-card__num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-pill);
    background: var(--color-primary);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
}

/* ---------- App chrome (dashboard etc.) ---------- */
.sd-shell {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg) var(--space-xxl);
}

.sd-shell-wide {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg) var(--space-xxl);
}

.sd-brand {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 600;
    letter-spacing: -0.28px;
    margin: 0;
    color: var(--color-ink);
}

.sd-lead {
    color: var(--color-ink-muted-48);
    font-size: 17px;
    margin: 0.4rem 0 1.25rem;
}

.sd-card {
    background: var(--color-canvas);
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius-lg);
    box-shadow: none;
    padding: var(--space-lg);
}

.sd-hero {
    padding: var(--space-xl) var(--space-lg);
    margin-bottom: var(--space-lg);
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    font-size: 14px;
    font-weight: 600;
    background: var(--color-surface-pearl);
    color: var(--color-ink-muted-80);
    border: 1px solid var(--color-divider-soft);
}

.option-card {
    display: block;
    width: 100%;
    text-align: left;
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius-lg);
    padding: 0.95rem 1rem;
    margin-bottom: 0.75rem;
    background: #fff;
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.option-card:hover,
.option-card:focus-within {
    border-color: var(--color-primary);
}

.option-card input { margin-right: 0.65rem; }

.option-card.selected {
    border: 2px solid var(--color-primary-focus);
    background: rgba(0, 102, 204, 0.04);
}

.progress-sd {
    height: 6px;
    border-radius: var(--radius-pill);
    background: rgba(0, 0, 0, 0.06);
    overflow: hidden;
}

.progress-sd .progress-bar {
    background: var(--color-primary);
    height: 100%;
}

.timer-box {
    position: sticky;
    top: calc(var(--nav-h) + 8px);
    z-index: 20;
    background: var(--color-surface-black);
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 0.85rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.timer-box .time {
    font-size: 1.5rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
}

.station-list .item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--color-divider-soft);
}

.station-list .item:last-child { border-bottom: 0; }

.badge-done {
    background: rgba(25, 135, 84, 0.12);
    color: var(--color-ok);
    border-radius: var(--radius-pill);
    padding: 6px 12px;
    font-size: 14px;
    font-weight: 600;
}

.badge-open {
    background: rgba(0, 102, 204, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-pill);
    padding: 6px 12px;
    font-size: 14px;
    font-weight: 600;
}

.admin-nav {
    background: var(--color-surface-black);
    color: #fff;
    padding: 0.9rem 1rem;
    margin-bottom: 0;
}

.admin-nav__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.85rem 1.25rem;
}

.admin-nav__brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 8rem;
}

.admin-nav__brand strong {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.admin-nav__brand span {
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
}

.admin-nav__groups {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem 1rem;
    flex: 1;
}

.admin-nav__group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.admin-nav__group--muted .admin-nav__link {
    color: rgba(255, 255, 255, 0.72);
}

.admin-nav__link {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    font-size: 12px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 6px 10px;
    border-radius: 999px;
}

.admin-nav__link:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.admin-nav__link.is-on {
    background: rgba(41, 151, 255, 0.22);
    color: #fff;
}

.admin-nav__user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

.admin-nav__user a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
}

.admin-page {
    padding-top: 1.25rem;
    padding-bottom: 2.5rem;
}

.admin-page__head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.admin-page__lead {
    margin: 0.35rem 0 0;
    color: var(--color-ink-muted-48);
    max-width: 36rem;
}

.admin-kicker {
    margin: 0 0 4px;
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-ink-muted-48);
    font-weight: 700;
}

.admin-stat__value {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.1;
}

.admin-code-line {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 0.75rem;
    margin: 0;
    color: var(--color-ink-muted-48);
}

.admin-code {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-ink);
    background: var(--color-canvas-parchment);
    padding: 2px 8px;
    border-radius: 6px;
}

.admin-status-pill {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 999px;
    background: #e8f1fb;
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 600;
}

.admin-advanced {
    padding: 1rem 1.15rem;
}

.admin-advanced > summary {
    cursor: pointer;
    font-weight: 600;
    list-style: none;
}

.admin-advanced > summary::-webkit-details-marker {
    display: none;
}

.table-sd {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-hairline);
}

.feedback-ok { border-left: 3px solid var(--color-ok); }
.feedback-bad { border-left: 3px solid var(--color-danger); }

.alert {
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-hairline);
}

.site-footer {
    background: var(--color-canvas-parchment);
    color: var(--color-ink-muted-80);
    padding: 64px var(--space-lg);
    font-size: 12px;
    line-height: 1.5;
}

.site-footer__inner {
    width: min(980px, 100%);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-lg);
}

.site-footer a {
    color: var(--color-ink-muted-80);
    text-decoration: none;
}

.site-footer a:hover { color: var(--color-primary); }

/* Reveal motion */
.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-in {
    opacity: 1;
    transform: none;
}

@media (max-width: 833px) {
    .feature-grid { grid-template-columns: 1fr; }
    .tile { padding: 48px var(--space-md); }
    .df-nav__links { display: none; }
}

@media (max-width: 576px) {
    .sd-shell,
    .sd-shell-wide {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }
}