:root {
    --bg: #07111f;
    --bg-soft: #0d1b2e;
    --card: rgba(12, 22, 38, 0.86);
    --card-border: rgba(148, 163, 184, 0.14);
    --text: #e5eefc;
    --muted: #9fb0c8;
    --accent: #4dd6c5;
    --accent-2: #7c8cff;
    --danger: #ff6b7a;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
}

* {
    box-sizing: border-box;
}

html, body {
    min-height: 100%;
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(124, 140, 255, 0.28), transparent 32%),
        radial-gradient(circle at top right, rgba(77, 214, 197, 0.20), transparent 28%),
        linear-gradient(180deg, #050a12 0%, var(--bg) 55%, #04070d 100%);
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.6), transparent 84%);
}

.shell {
    width: min(1200px, calc(100% - 32px));
    margin: 0 auto;
    padding: 32px 0 40px;
    position: relative;
    z-index: 1;
}

.hero {
    display: grid;
    grid-template-columns: 1.2fr 0.9fr;
    gap: 24px;
    align-items: stretch;
    margin-bottom: 24px;
}

.hero__copy,
.hero__panel,
.card,
.note-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.hero__copy {
    border-radius: 28px;
    padding: 34px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 999px;
    color: #dffef8;
    background: rgba(77, 214, 197, 0.14);
    border: 1px solid rgba(77, 214, 197, 0.18);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1 {
    margin: 18px 0 16px;
    font-size: clamp(34px, 5vw, 62px);
    line-height: 1.02;
    letter-spacing: -0.05em;
}

.hero p {
    margin: 0;
    max-width: 66ch;
    color: var(--muted);
    line-height: 1.7;
    font-size: 16px;
}

.hero__stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 24px;
}

.stat {
    border-radius: 18px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.stat strong,
.panel__head strong,
.result__meta strong {
    display: block;
    font-size: 18px;
    margin-bottom: 5px;
}

.stat span,
.panel__head span,
.result__meta span,
.card__head p,
.note-card p,
.field span {
    color: var(--muted);
}

.hero__panel {
    border-radius: 28px;
    padding: 18px;
}

.panel {
    height: 100%;
    border-radius: 22px;
    padding: 22px;
    background: linear-gradient(180deg, rgba(14, 27, 47, 0.98), rgba(8, 15, 27, 0.98));
    border: 1px solid rgba(255, 255, 255, 0.07);
}

.panel--glow {
    position: relative;
    overflow: hidden;
}

.panel--glow::after {
    content: '';
    position: absolute;
    inset: auto -30% -40% auto;
    width: 220px;
    height: 220px;
    background: radial-gradient(circle, rgba(124, 140, 255, 0.4), transparent 70%);
    filter: blur(10px);
    pointer-events: none;
}

.panel__head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
}

.qrcode {
    display: grid;
    place-items: center;
    min-height: 320px;
    border-radius: 20px;
    background: #fff;
    padding: 18px;
}

.panel__actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 24px;
    margin-bottom: 24px;
}

.card {
    border-radius: 26px;
    padding: 26px;
}

.card__head h2,
.note-card h3 {
    margin: 0 0 8px;
    font-size: 22px;
}

.card__head p {
    margin: 0;
    line-height: 1.6;
}

.alert {
    margin-top: 18px;
    padding: 14px 16px;
    border-radius: 16px;
    font-weight: 600;
}

.alert--error {
    background: rgba(255, 107, 122, 0.12);
    border: 1px solid rgba(255, 107, 122, 0.28);
    color: #ffd0d6;
}

.alert--success {
    background: rgba(77, 214, 197, 0.12);
    border: 1px solid rgba(77, 214, 197, 0.28);
    color: #dffff8;
}

.form {
    margin-top: 22px;
    display: grid;
    gap: 18px;
}

.field {
    display: grid;
    gap: 8px;
}

.field textarea,
.field input {
    width: 100%;
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    padding: 16px 18px;
    outline: none;
    font: inherit;
    transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.field textarea:focus,
.field input:focus {
    border-color: rgba(77, 214, 197, 0.65);
    background: rgba(255, 255, 255, 0.06);
}

.field textarea {
    resize: vertical;
    min-height: 170px;
}

.field-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 14px;
    align-items: end;
}

.presets {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.preset-btn {
    border: 1px solid rgba(124, 140, 255, 0.22);
    background: rgba(124, 140, 255, 0.08);
    color: #dfe7ff;
    padding: 10px 14px;
    border-radius: 999px;
    font: inherit;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.preset-btn:hover {
    transform: translateY(-1px);
    background: rgba(124, 140, 255, 0.14);
    border-color: rgba(124, 140, 255, 0.34);
}

.btn {
    border: 1px solid rgba(148, 163, 184, 0.20);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    padding: 14px 18px;
    border-radius: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.18s ease, background 0.18s ease, opacity 0.18s ease;
    white-space: nowrap;
}

.btn:hover:not(:disabled) {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.08);
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.btn--primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #031118;
    border-color: transparent;
    box-shadow: 0 16px 30px rgba(77, 214, 197, 0.18);
}

.btn--submit {
    align-self: end;
}

.result {
    margin-top: 22px;
    display: grid;
    gap: 18px;
}

.result__meta {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.result__meta > div {
    border-radius: 18px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.notes {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.grid--scan {
    margin-bottom: 24px;
}

.scan {
    margin-top: 22px;
    display: grid;
    gap: 18px;
}

.scan__toolbar,
.scan__actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.scan__preview {
    position: relative;
    min-height: 280px;
    border-radius: 22px;
    overflow: hidden;
    background:
        radial-gradient(circle at top, rgba(124, 140, 255, 0.18), transparent 60%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.02));
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.scan__preview video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.scan__placeholder {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    text-align: center;
    color: var(--muted);
    padding: 24px;
    line-height: 1.6;
}

.scan__preview canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    pointer-events: none;
}

.note-card--compact {
    padding: 18px 20px;
}

.note-card {
    border-radius: 22px;
    padding: 22px;
}

.note-card ol {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
    line-height: 1.8;
}

.note-card code {
    color: #dffef8;
}

@media (max-width: 980px) {
    .hero,
    .grid,
    .notes {
        grid-template-columns: 1fr;
    }

    .hero__stats,
    .result__meta {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .shell {
        width: min(100% - 20px, 1200px);
        padding-top: 20px;
    }

    .hero__copy,
    .card,
    .note-card,
    .hero__panel,
    .panel {
        border-radius: 22px;
    }

    .hero__copy,
    .card,
    .note-card {
        padding: 20px;
    }

    .field-row,
    .panel__actions,
    .scan__toolbar,
    .scan__actions {
        grid-template-columns: 1fr;
    }

    .btn--submit {
        width: 100%;
    }

    .qrcode {
        min-height: 280px;
    }
}