static/style.css

:root {
    --bg: #d7e6f8;
    --panel: rgba(255, 255, 255, 0.92);
    --panel-border: rgba(196, 213, 232, 0.7);
    --soft-border: #e8edf4;
    --text: #24384f;
    --muted: #8a99ad;
    --blue: #2d8cf0;
    --blue-deep: #226fbd;
    --red: #f15a49;
    --green: #1ca48d;
    --amber: #f4be59;
    --shadow: 0 34px 70px rgba(88, 116, 154, 0.24);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.6), transparent 32%),
        linear-gradient(180deg, #d9e8fa 0%, #c8daf0 100%);
    min-height: 100vh;
    color: var(--text);
}

.shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 18px;
}

.panel {
    width: min(1040px, 100%);
    background: var(--panel);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 28px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
    padding: 34px;
}

.hero {
    margin-bottom: 18px;
}

.eyebrow {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: 10px;
}

.hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.04;
    margin-bottom: 10px;
}

.hero-copy {
    max-width: 620px;
    color: #62748b;
    font-size: 15px;
    line-height: 1.6;
}

.status-row {
    margin-bottom: 18px;
}

.status {
    width: 100%;
    border-radius: 16px;
    padding: 14px 18px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid transparent;
}

.status.loading {
    background: #fff6d9;
    color: #866014;
    border-color: #f7e0a1;
}

.status.success {
    background: #e6f8ef;
    color: #1d7a57;
    border-color: #b9ebd0;
}

.status.error {
    background: #fde8e8;
    color: #a53c3c;
    border-color: #f7c8c8;
}

.dropzone {
    border: 1.5px dashed #dfe7f1;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.75);
    min-height: 108px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 22px;
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    margin-bottom: 28px;
}

.dropzone:hover,
.dropzone:focus-visible,
.dropzone.dragover {
    border-color: #8ec2fb;
    box-shadow: 0 12px 28px rgba(70, 118, 176, 0.12);
    transform: translateY(-1px);
    outline: none;
}

.dropzone-icon {
    width: 30px;
    height: 30px;
    border-radius: 10px;
    background: rgba(45, 140, 240, 0.1);
    color: var(--blue);
    font-size: 20px;
    font-weight: 700;
    display: grid;
    place-items: center;
    flex-shrink: 0;
}

.dropzone-copy {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    justify-content: center;
    text-align: center;
    color: #39495d;
    font-size: 16px;
}

.link-btn {
    border: none;
    background: none;
    color: var(--blue);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.workspace,
.output-grid {
    margin-top: 10px;
}

.workspace-header,
.output-head {
    margin-bottom: 16px;
}

.workspace-header h2,
.output-head h3 {
    font-size: 14px;
    font-weight: 700;
    color: #a0acbb;
    margin-bottom: 4px;
}

.workspace-header p,
.output-head p {
    color: var(--muted);
    font-size: 13px;
}

.card-grid,
.output-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.source-card,
.output-card {
    background: #fff;
    border: 1px solid var(--soft-border);
    border-radius: 18px;
    min-height: 160px;
    padding: 22px 22px 18px;
    position: relative;
    box-shadow: 0 8px 24px rgba(101, 122, 149, 0.08);
}

.source-card {
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 10px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.source-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(101, 122, 149, 0.12);
    border-color: #dbe7f6;
}

.source-card strong {
    font-size: 18px;
    font-weight: 600;
}

.card-meta {
    color: var(--muted);
    font-size: 14px;
}

.card-menu {
    position: absolute;
    top: 18px;
    right: 20px;
    font-size: 22px;
    color: #29384a;
    letter-spacing: 0.04em;
}

.card-icon {
    position: absolute;
    top: 22px;
    left: 22px;
    width: 28px;
    height: 28px;
    border-radius: 9px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.card-icon::after {
    content: "";
    position: absolute;
    inset: 8px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.9);
}

.image-card-icon,
.audio-card-icon {
    background: linear-gradient(180deg, #53abff 0%, #2d8cf0 100%);
}

.mic-card-icon {
    background: linear-gradient(180deg, #2ac3ab 0%, #16937e 100%);
}

.stop-card-icon {
    background: linear-gradient(180deg, #ffc766 0%, #f1a92f 100%);
}

.action-card {
    border: none;
    text-align: left;
    color: var(--text);
}

.action-card:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 8px 24px rgba(101, 122, 149, 0.08);
}

.preview-card,
.result {
    min-height: 280px;
}

.preview {
    min-height: 196px;
    border: 1.5px dashed #dce6f2;
    border-radius: 18px;
    background: linear-gradient(180deg, #fcfdff 0%, #f6f9fd 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--muted);
    padding: 20px;
}

.preview.active {
    border-color: #96c6ff;
}

.preview img {
    max-width: 100%;
    max-height: 260px;
    border-radius: 14px;
    box-shadow: 0 12px 28px rgba(50, 80, 120, 0.12);
}

.preview audio {
    width: min(340px, 100%);
    margin-top: 12px;
}

.preview p {
    font-size: 15px;
}

.result.hidden {
    display: none;
}

.result-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 10px;
}

.result-item {
    border: 1px solid #e6edf7;
    border-radius: 16px;
    padding: 14px 16px;
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.result-item strong {
    display: block;
    font-size: 16px;
    margin-bottom: 6px;
}

.result-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    color: var(--muted);
    font-size: 13px;
}

.next-btn {
    margin-top: 18px;
    align-self: flex-start;
    border: none;
    border-radius: 999px;
    background: #eef5ff;
    color: var(--blue-deep);
    padding: 12px 18px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.next-btn:hover {
    background: #dbeafc;
    transform: translateY(-1px);
}

@media (max-width: 760px) {
    .panel {
        padding: 22px;
        border-radius: 22px;
    }

    .card-grid,
    .output-grid {
        grid-template-columns: 1fr;
    }

    .dropzone {
        flex-direction: column;
    }
}