:root {
    --bg: #f6f5f1;
    --surface: #ffffff;
    --text: #1f2937;
    --text-muted: #6b7280;
    --accent: #8b6f47;
    --accent-hover: #6e5635;
    --error: #b91c1c;
    --success: #15803d;
    --border: #e5e1d8;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.04);
    --radius: 12px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter",
                 "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 20px 64px;
}

.hero {
    text-align: center;
    margin-bottom: 32px;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.lead {
    margin: 0;
    color: var(--text-muted);
    font-size: 16px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
}

.card h2 {
    margin: 0 0 16px;
    font-size: 18px;
    font-weight: 600;
}

.dropzone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    background: #fafaf7;
    padding: 40px 20px;
    text-align: center;
    transition: border-color 0.15s, background 0.15s;
    cursor: pointer;
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--accent);
    background: #f3efe7;
}

.dropzone-inner {
    pointer-events: none;
}

.upload-icon {
    width: 40px;
    height: 40px;
    color: var(--accent);
    margin-bottom: 12px;
}

.dropzone-hint {
    margin: 0 0 6px;
    color: var(--text);
    font-size: 15px;
}

.dropzone-meta {
    margin: 0;
    color: var(--text-muted);
    font-size: 13px;
}

.link-btn {
    background: none;
    border: none;
    color: var(--accent);
    text-decoration: underline;
    cursor: pointer;
    font: inherit;
    padding: 0;
    pointer-events: auto;
}

.link-btn:hover { color: var(--accent-hover); }

.file-info {
    margin: 16px 0 0;
    padding: 12px 14px;
    background: #fafaf7;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text);
}

.file-info strong { font-weight: 600; }

.result-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 24px;
    margin: 0 0 20px;
}

.result-list > div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.result-list dt {
    color: var(--text-muted);
    font-size: 13px;
    margin: 0;
}

.result-list dd {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font: inherit;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
}

.btn svg { width: 18px; height: 18px; }

.btn.primary {
    background: var(--accent);
    color: #fff;
}

.btn.primary:hover { background: var(--accent-hover); }

.btn.secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    margin-left: 8px;
}

.btn.secondary:hover { background: #f3efe7; }

.progress {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 16px;
}

.progress-bar {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.2s;
}

.error-card {
    border-color: #f3c0c0;
    background: #fef2f2;
}

.error-card h2 { color: var(--error); margin-bottom: 8px; }
.error-card p { margin: 0; color: var(--error); }

.footer {
    margin-top: 32px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

.footer p { margin: 4px 0; }
.footer a { color: var(--text-muted); }

@media (max-width: 480px) {
    .container { padding: 20px 14px 48px; }
    .hero h1 { font-size: 26px; }
    .result-list { grid-template-columns: 1fr; gap: 10px; }
    .btn { width: 100%; justify-content: center; }
    .btn.secondary { margin-left: 0; margin-top: 8px; }
}