:root {
    --bg: #0e0f12;
    --card: #151821;
    --muted: #8a93a6;
    --text: #e9ecf1;
    --accent: #6ee7ff;
    --accent-2: #8b5cf6;
    --ok: #10b981;
    --warn: #f59e0b;
    --err: #ef4444;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --radius: 16px;
}
* {
    box-sizing: border-box;
}
body {
    margin: 0;
    font-family:
        ui-sans-serif,
        system-ui,
        -apple-system,
        Segoe UI,
        Roboto,
        Inter,
        Arial,
        "Apple Color Emoji",
        "Segoe UI Emoji";
    background:
        radial-gradient(1200px 800px at 80% -10%, rgba(139, 92, 246, 0.25), transparent 60%),
        radial-gradient(900px 700px at -10% 20%, rgba(110, 231, 255, 0.18), transparent 60%), var(--bg);
    color: var(--text);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
header {
    padding: 28px 20px 10px;
    text-align: center;
}
.title {
    font-size: clamp(22px, 4vw, 36px);
    font-weight: 600;
    letter-spacing: 0.3px;
}
.subtitle {
    color: var(--muted);
    margin-top: 8px;
}
main {
    max-width: 1100px;
    margin: 30px auto 80px;
    padding: 0 18px;
}

.grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 18px;
}
@media (max-width: 900px) {
    .grid {
        grid-template-columns: 1fr;
    }
}

.card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)), var(--card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: var(--shadow);
    border-radius: var(--radius);
}
.card h3 {
    margin: 0 0 10px;
}
.card .body {
    padding: 18px;
}

.drop {
    border: 2px dashed rgba(255, 255, 255, 0.15);
    border-radius: calc(var(--radius) - 6px);
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    cursor: pointer;
    transition: 0.2s;
    text-align: center;
}
.drop:hover {
    border-color: rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.02);
}

.drop .badge {
    padding: 6px 10px;
    font-size: 12px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--muted);
}
input[type="file"] {
    display: none;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-top: 14px;
}
button {
    appearance: none;
    border: 0;
    padding: 12px 16px;
    border-radius: 12px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow);
}
.btn {
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    color: #0b0c10;
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
.btn-ghost {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: var(--text);
}

.sizes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 8px;
    margin-top: 10px;
}
.sizes label {
    display: flex;
    align-items: center;
    gap: 4px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 13px;
}

.results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 14px;
}
.thumb {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 10px;
    text-align: center;
}
.thumb img {
    max-width: 100%;
    image-rendering: -webkit-optimize-contrast;
}
.thumb .meta {
    color: var(--muted);
    font-size: 12px;
    margin-top: 6px;
}

.snippet {
    background: #0b0c10;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 12px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 12px;
    color: #d0d6e4;
    overflow: auto;
}

.note {
    font-size: 13px;
    font-style: italic;
    color: var(--muted);
    margin-top: 12px;
}

.footer {
    font-size: 12px;
    font-weight: 300;
    max-width: 1100px;
    margin: 24px auto 40px;
    padding: 0 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--muted);
}
.sig {
    font-family: "Brush Script MT", "Lucida Handwriting", cursive;
    font-size: 20px;
    color: #fff;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.55);
    z-index: 50;
}
.modal.open {
    display: flex;
}
.modal-card {
    background: var(--card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    max-width: 520px;
    width: 92%;
    padding: 18px;
}
.modal-card h4 {
    margin: 0 0 8px;
}
.modal-card p {
    margin: 0 0 14px;
    color: var(--muted);
}