:root {
    /* Mirrors Android DefaultColorPaletteLight (com.noa.smartscanai.ui.theme.Color) */
    --primary: #019D88;
    --primary-dark: #00897B;
    --primary-light: #4DB6AC;
    --secondary: #FF7043;
    --secondary-dark: #E64A19;
    --secondary-light: #FF8A65;
    --bg: #FFFFFF;
    --bg-alt: #F5F5F5;
    --bg-elevated: #FFFFFF;
    --surface: #FFFFFF;
    --text: #333333;
    --text-muted: #6B7280;
    --border: #E0E4E3;
    --danger: #D32F2F;
    --success: #2E7D32;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 6px 20px rgba(1, 157, 136, 0.10);
    --shadow-lg: 0 18px 50px rgba(1, 157, 136, 0.20);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-pill: 999px;
    --container: 1180px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Mirrors Android DefaultColorPaletteDark — orange on slate */
        --primary: #FFA500;
        --primary-dark: #FB8C00;
        --primary-light: #FFCC80;
        --secondary: #FFA500;
        --secondary-dark: #FF8A65;
        --secondary-light: #FFB74D;
        --bg: #1F272D;
        --bg-alt: #2B343B;
        --bg-elevated: #2B343B;
        --surface: #2B343B;
        --text: #E0E0E0;
        --text-muted: #9DA9B0;
        --border: #3A4148;
        --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55);
        /* On orange/yellow primary in dark mode, dark text reads better than white */
        --on-primary: #1F272D;
        --on-secondary: #1F272D;
    }
    .btn-primary { color: var(--on-primary) !important; box-shadow: 0 6px 18px rgba(255, 165, 0, 0.32) !important; }
    .btn-primary:hover { color: var(--on-primary) !important; }
    .btn-secondary { color: var(--on-secondary) !important; }
    .btn-secondary:hover { color: var(--on-secondary) !important; }
    .cta-strip .btn { color: var(--primary) !important; }
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Navbar ---------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand-name { font-size: 17px; letter-spacing: -0.01em; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-links a {
    color: var(--text-muted);
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--text); background: var(--bg-alt); }
.nav-links a.active { color: var(--primary); background: color-mix(in srgb, var(--primary) 10%, transparent); }
.nav-cta { margin-left: 8px; }

.nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 10px;
    width: 40px;
    height: 40px;
    padding: 0;
    cursor: pointer;
    color: var(--text);
    -webkit-tap-highlight-color: transparent;
}
.nav-toggle:active { transform: scale(0.96); }
.nav-toggle svg { pointer-events: none; }

@media (max-width: 820px) {
    .nav-toggle { display: inline-flex; }
    .nav-links {
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        z-index: 60;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 12px 16px 18px;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        display: none;
    }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 12px 14px; font-size: 16px; }
    .nav-cta { margin: 6px 0 0 0; text-align: center; }
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: transform .12s ease, box-shadow .15s ease, background .15s;
    text-decoration: none;
    background: var(--bg-alt);
    color: var(--text);
    line-height: 1;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 18px rgba(1, 157, 136, 0.32);
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary {
    background: var(--secondary);
    color: #fff;
}
.btn-secondary:hover { background: var(--secondary-dark); color: #fff; }
.btn-ghost {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
}
.btn-ghost:hover { background: var(--bg-alt); }
.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-lg { padding: 16px 28px; font-size: 16px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .55; cursor: not-allowed; transform: none; }

/* ---------- Hero ---------- */
.hero {
    padding: 72px 0 56px;
    background:
        radial-gradient(1200px 480px at 90% -10%, color-mix(in srgb, var(--secondary) 28%, transparent), transparent 60%),
        radial-gradient(900px 600px at -10% 10%, color-mix(in srgb, var(--primary) 30%, transparent), transparent 60%);
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: center;
}
.hero h1 {
    font-size: clamp(34px, 5.2vw, 56px);
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin: 0 0 18px;
}
.hero h1 .accent {
    background: linear-gradient(120deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero p.lead {
    font-size: 18px;
    color: var(--text-muted);
    margin: 0 0 28px;
    max-width: 540px;
}
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 18px;
}
.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    color: var(--text-muted);
    font-size: 13px;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta svg { color: var(--secondary-dark); }

@media (max-width: 880px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* ---------- Cards / Sections ---------- */
section { padding: 64px 0; }
.section-head { text-align: center; max-width: 700px; margin: 0 auto 40px; }
.section-head h2 {
    font-size: clamp(26px, 3.4vw, 36px);
    margin: 0 0 12px;
    letter-spacing: -0.015em;
}
.section-head p { color: var(--text-muted); font-size: 17px; margin: 0; }
.eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--primary);
    background: color-mix(in srgb, var(--primary) 10%, transparent);
    padding: 6px 12px;
    border-radius: var(--radius-pill);
    margin-bottom: 14px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}
.card-tight { padding: 18px; }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
@media (max-width: 880px) { .feature-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .feature-grid { grid-template-columns: 1fr; } }

.feature {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 22px;
    transition: transform .18s ease, box-shadow .18s ease, border-color .15s;
}
.feature:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: color-mix(in srgb, var(--primary) 30%, var(--border));
}
.feature-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    margin-bottom: 14px;
}
.feature h3 { margin: 0 0 6px; font-size: 17px; letter-spacing: -0.01em; }
.feature p { margin: 0; color: var(--text-muted); font-size: 14.5px; }

/* ---------- Scanner widget ---------- */
.scanner-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}
.scanner-stage {
    position: relative;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-md);
    background: #0a0816;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    font-size: 14px;
}
.scanner-stage video,
.scanner-stage img,
.scanner-stage canvas {
    width: 100% !important;
    height: 100% !important;
    object-fit: cover;
}
.scanner-stage .placeholder {
    text-align: center;
    padding: 24px;
}
.scanner-stage .placeholder svg {
    width: 56px; height: 56px; margin-bottom: 10px; opacity: .85;
}
.scanner-overlay {
    position: absolute;
    inset: 12%;
    border: 2px solid rgba(255,255,255,0.7);
    border-radius: 18px;
    pointer-events: none;
    box-shadow: 0 0 0 9999px rgba(0,0,0,0.35);
}
.scanner-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 14px;
}
.scanner-actions .grow { flex: 1; }

.result-panel {
    margin-top: 16px;
    padding: 16px;
    border-radius: var(--radius-md);
    background: var(--bg-alt);
    border: 1px solid var(--border);
    display: none;
}
.result-panel.show { display: block; }
.result-type {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 8px;
}
.result-content {
    font-size: 15px;
    word-break: break-all;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 12px;
    max-height: 160px;
    overflow: auto;
}
.result-actions { display: flex; flex-wrap: wrap; gap: 8px; }

/* ---------- Forms ---------- */
.form-row { display: grid; gap: 6px; margin-bottom: 14px; }
.form-row label { font-size: 13px; font-weight: 600; color: var(--text-muted); }
.input, .select, .textarea {
    width: 100%;
    padding: 11px 13px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
    font-size: 15px;
    transition: border-color .15s, box-shadow .15s;
}
.input:focus, .select:focus, .textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent);
}
.textarea { min-height: 100px; resize: vertical; }
.color-row { display: flex; align-items: center; gap: 10px; }
.color-row input[type="color"] {
    width: 44px; height: 36px; border: 1px solid var(--border); border-radius: 8px; padding: 2px; background: var(--surface); cursor: pointer;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 600px) { .grid-2 { grid-template-columns: 1fr; } }

/* ---------- Showcase / phones ---------- */
.showcase {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
@media (max-width: 880px) { .showcase { grid-template-columns: repeat(2, 1fr); } }
.showcase img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--bg-alt);
    padding: 16px;
    transition: transform .2s;
}
.showcase img:hover { transform: scale(1.03); }

/* ---------- CTA strip ---------- */
.cta-strip {
    background: linear-gradient(120deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    box-shadow: var(--shadow-lg);
}
.cta-strip h3 { margin: 0 0 6px; font-size: 24px; letter-spacing: -0.01em; }
.cta-strip p { margin: 0; opacity: 0.9; }
.cta-strip .btn { background: #fff; color: var(--primary); }
.cta-strip .btn:hover { background: #f1ebff; }

/* ---------- Footer ---------- */
footer {
    border-top: 1px solid var(--border);
    padding: 36px 0;
    color: var(--text-muted);
    font-size: 14px;
}
.foot-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}
.foot-links { display: flex; gap: 18px; }
.foot-links a { color: var(--text-muted); }

/* ---------- Page header (interior pages) ---------- */
.page-head {
    padding: 56px 0 24px;
    background:
        radial-gradient(700px 280px at 100% 0%, color-mix(in srgb, var(--secondary) 18%, transparent), transparent 60%),
        radial-gradient(700px 280px at 0% 0%, color-mix(in srgb, var(--primary) 22%, transparent), transparent 60%);
}
.page-head h1 {
    font-size: clamp(28px, 4vw, 42px);
    margin: 0 0 8px;
    letter-spacing: -0.02em;
}
.page-head p { margin: 0; color: var(--text-muted); font-size: 17px; max-width: 640px; }

.layout-2col {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 28px;
    align-items: start;
}
@media (max-width: 980px) { .layout-2col { grid-template-columns: 1fr; } }

/* ---------- History ---------- */
.history-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 18px;
    align-items: center;
}
.history-toolbar .input { max-width: 320px; }
.history-toolbar .select { max-width: 200px; }
.history-list {
    display: grid;
    gap: 12px;
}
.history-item {
    display: grid;
    grid-template-columns: 44px 1fr auto;
    gap: 14px;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
}
.history-item .ico {
    width: 44px; height: 44px; border-radius: 12px;
    background: color-mix(in srgb, var(--primary) 12%, transparent);
    color: var(--primary);
    display: inline-flex; align-items: center; justify-content: center;
}
.history-item .meta { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.history-item .content {
    font-size: 14.5px;
    word-break: break-all;
    -webkit-line-clamp: 2;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.history-item .actions { display: flex; gap: 6px; }
.icon-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 10px;
    width: 36px; height: 36px;
    display: inline-flex; align-items: center; justify-content: center;
    cursor: pointer; color: var(--text-muted);
}
.icon-btn:hover { color: var(--text); background: var(--bg-alt); }
.icon-btn.fav { color: var(--secondary-dark); }

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
    border: 1px dashed var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-alt);
}

/* ---------- Toast ---------- */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--text);
    color: var(--bg);
    padding: 12px 18px;
    border-radius: var(--radius-pill);
    font-size: 14px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: opacity .2s, transform .2s;
    pointer-events: none;
    z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* html5-qrcode visual cleanup */
#qr-reader__dashboard_section_csr,
#qr-reader__dashboard_section_swaplink,
#qr-reader__status_span,
#qr-reader__header_message { display: none !important; }
#qr-reader { border: 0 !important; padding: 0 !important; }
#qr-reader video { border-radius: var(--radius-md); }

/* Small helpers */
.hidden { display: none !important; }
.row { display: flex; gap: 10px; flex-wrap: wrap; }
.spacer { flex: 1; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.text-muted { color: var(--text-muted); }