:root {
    color-scheme: light;
    --bg: #f4efe7;
    --surface: rgba(255, 252, 246, 0.92);
    --surface-strong: #fffaf1;
    --ink: #1f2933;
    --muted: #6b6258;
    --line: rgba(91, 71, 49, 0.16);
    --accent: #d97706;
    --accent-strong: #9a3412;
    --good: #15803d;
    --danger: #b91c1c;
    --shadow: 0 26px 70px rgba(80, 52, 22, 0.18);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    padding: clamp(18px, 4vw, 48px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink);
    font-family: "Avenir Next", "Noto Sans JP", "Yu Gothic", sans-serif;
    background:
        radial-gradient(circle at 12% 16%, rgba(251, 191, 36, 0.26), transparent 28%),
        radial-gradient(circle at 88% 8%, rgba(20, 184, 166, 0.18), transparent 24%),
        linear-gradient(135deg, #fff7ed 0%, #f1eadf 46%, #e7f0e8 100%);
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(rgba(31, 41, 51, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(31, 41, 51, 0.035) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: radial-gradient(circle at center, black, transparent 78%);
}

.clouds {
    position: fixed;
    inset: 0 0 auto 0;
    height: 220px;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

.cloud {
    position: absolute;
    width: 150px;
    height: 58px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.78);
    filter: blur(0.3px);
    opacity: 0.85;
}

.cloud::before,
.cloud::after {
    content: "";
    position: absolute;
    background: inherit;
    border-radius: 50%;
}

.cloud::before {
    width: 78px;
    height: 78px;
    top: -28px;
    left: 24px;
}

.cloud::after {
    width: 68px;
    height: 68px;
    top: -10px;
    right: 22px;
}

.container {
    width: min(780px, 100%);
    padding: clamp(24px, 5vw, 42px);
    position: relative;
    z-index: 1;
    border: 1px solid var(--line);
    border-radius: 30px;
    background: var(--surface);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.eyebrow {
    width: fit-content;
    margin: 0 auto 10px;
    padding: 7px 12px;
    border: 1px solid rgba(217, 119, 6, 0.3);
    border-radius: 999px;
    color: var(--accent-strong);
    background: rgba(251, 191, 36, 0.18);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

h1,
h2,
p {
    margin-top: 0;
}

h1 {
    margin-bottom: 10px;
    text-align: center;
    font-size: clamp(2rem, 7vw, 3.6rem);
    line-height: 1;
    letter-spacing: -0.06em;
}

.subtitle {
    margin-bottom: 30px;
    color: var(--muted);
    text-align: center;
    line-height: 1.7;
}

.section h2 {
    margin-bottom: 16px;
    color: var(--accent-strong);
    font-size: 1rem;
    letter-spacing: 0.08em;
}

.upload-area {
    display: grid;
    gap: 12px;
    place-items: center;
    padding: clamp(26px, 7vw, 48px);
    border: 2px dashed rgba(217, 119, 6, 0.45);
    border-radius: 24px;
    background:
        linear-gradient(135deg, rgba(255, 250, 241, 0.88), rgba(255, 247, 237, 0.62)),
        radial-gradient(circle at 50% 0%, rgba(251, 191, 36, 0.22), transparent 46%);
    cursor: pointer;
    text-align: center;
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.upload-area:hover,
.upload-area.dragover {
    transform: translateY(-2px);
    border-color: var(--accent);
    box-shadow: 0 16px 36px rgba(217, 119, 6, 0.16);
}

.upload-icon {
    display: grid;
    place-items: center;
    width: 68px;
    height: 68px;
    border-radius: 22px;
    color: #fffaf1;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    font-weight: 900;
    letter-spacing: -0.08em;
    box-shadow: 0 14px 28px rgba(154, 52, 18, 0.25);
}

.upload-text {
    color: var(--ink);
    font-size: clamp(1.05rem, 3vw, 1.3rem);
    font-weight: 800;
}

.upload-subtext,
.queue-hint,
.share-hint,
.file-size,
.file-status {
    color: var(--muted);
    font-size: 0.86rem;
    line-height: 1.5;
}

#fileInput {
    display: none;
}

button,
.download-button,
.upload-button {
    border: 0;
    border-radius: 999px;
    padding: 11px 16px;
    color: #fffaf1;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.15s ease, opacity 0.15s ease, box-shadow 0.15s ease;
    box-shadow: 0 10px 24px rgba(154, 52, 18, 0.2);
}

button:hover:not(:disabled),
.download-button:hover:not(:disabled),
.upload-button:hover:not(:disabled) {
    transform: translateY(-1px);
}

button:disabled,
.download-button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
    box-shadow: none;
}

.queue-container {
    margin-top: 24px;
    padding: clamp(16px, 3vw, 22px);
    display: grid;
    gap: 14px;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: rgba(255, 250, 241, 0.72);
}

.queue-header,
.queue-row,
.share-panel,
.share-actions,
.queue-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.queue-header,
.share-panel,
.queue-row {
    justify-content: space-between;
}

.queue-header,
.share-panel {
    flex-wrap: wrap;
}

.queue-title,
.share-title,
.file-name {
    color: var(--ink);
    font-weight: 900;
}

.queue-count,
.copy-badge {
    display: inline-flex;
    min-width: 42px;
    justify-content: center;
    padding: 6px 10px;
    border-radius: 999px;
    color: #fffaf1;
    background: #1f2933;
    font-size: 0.78rem;
    font-weight: 900;
}

.share-panel {
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--surface-strong);
}

.share-actions {
    flex-wrap: wrap;
}

.copy-all-button {
    background: linear-gradient(135deg, #0f766e, #115e59);
}

.zip-button {
    background: linear-gradient(135deg, #166534, #14532d);
}

.is-copied {
    background: linear-gradient(135deg, var(--good), #166534) !important;
}

.share-links,
.queue-list {
    display: grid;
    gap: 12px;
}

.share-link,
.queue-empty,
.queue-item {
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.68);
}

.share-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px;
}

.share-link a,
.share-link-anchor {
    color: var(--accent-strong);
    word-break: break-all;
    text-decoration: none;
}

.share-link a:hover,
.share-link-anchor:hover {
    text-decoration: underline;
}

.queue-empty {
    padding: 18px;
    color: var(--muted);
    text-align: center;
}

.queue-item {
    padding: 14px;
    border-left: 6px solid var(--accent);
    box-shadow: 0 10px 28px rgba(80, 52, 22, 0.08);
}

.queue-item.success {
    border-left-color: var(--good);
}

.queue-item.error {
    border-left-color: var(--danger);
}

.queue-item.canceled {
    opacity: 0.72;
}

.queue-meta {
    min-width: 0;
}

.file-name {
    word-break: break-all;
}

.cancel-button,
.queue-actions .download-button,
.share-link .download-button {
    padding: 8px 12px;
    font-size: 0.82rem;
}

.cancel-button {
    color: var(--danger);
    border: 1px solid rgba(185, 28, 28, 0.3);
    background: rgba(254, 242, 242, 0.85);
    box-shadow: none;
}

.progress-bar {
    height: 9px;
    margin-top: 12px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(91, 71, 49, 0.12);
}

.progress-fill {
    width: 0%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #f59e0b, #0f766e);
    transition: width 0.24s ease;
}

.progress-text {
    margin-top: 8px;
}

.queue-link-box {
    display: none !important;
}

.error-message,
.success-message {
    margin-bottom: 16px;
    padding: 12px 14px;
    border-radius: 16px;
    font-weight: 800;
}

.error-message {
    color: var(--danger);
    border: 1px solid rgba(185, 28, 28, 0.2);
    background: rgba(254, 242, 242, 0.88);
}

.success-message {
    color: var(--good);
    border: 1px solid rgba(21, 128, 61, 0.2);
    background: rgba(240, 253, 244, 0.88);
}

.preview-container {
    display: none;
    margin-top: 22px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: var(--surface-strong);
}

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    color: #fffaf1;
    background: #1f2933;
    font-weight: 900;
}

.preview-close {
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.12);
    box-shadow: none;
}

.preview-body {
    max-height: 360px;
    overflow: auto;
    padding: 16px;
}

.preview-image,
.preview-video {
    display: block;
    width: 100%;
    max-height: 320px;
    object-fit: contain;
    border-radius: 16px;
    background: #111827;
}

.preview-audio {
    width: 100%;
    margin-bottom: 12px;
}

.preview-text {
    margin: 0;
    white-space: pre-wrap;
    word-break: break-word;
    color: #f8fafc;
    background: #111827;
    border-radius: 16px;
    padding: 16px;
    font-family: "SFMono-Regular", Consolas, monospace;
    font-size: 0.86rem;
    line-height: 1.55;
}

.preview-unavailable {
    padding: 24px;
    color: var(--muted);
    text-align: center;
}

[hidden] {
    display: none !important;
}

@media (max-width: 680px) {
    body {
        align-items: flex-start;
        padding: 14px;
    }

    .container {
        border-radius: 24px;
    }

    .queue-header,
    .queue-row,
    .share-panel,
    .share-link,
    .share-actions,
    .queue-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .queue-count,
    button,
    .download-button,
    .upload-button {
        width: 100%;
    }
}