/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #0f0f0f;
    --surface: #1a1a1a;
    --surface-hover: #222;
    --border: #2a2a2a;
    --text: #e8e8e8;
    --text-muted: #888;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #22c55e;
    --error: #ef4444;
    --radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 3rem 1rem;
}

/* Header */
.app-header {
    margin-bottom: 2rem;
}

h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
}

h2 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    margin-top: 2rem;
}

/* Form */
.form-group {
    margin-bottom: 1.25rem;
}

label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Drop zone */
.drop-zone {
    width: 100%;
    padding: 2rem 1rem;
    border: 1px dashed #333;
    border-radius: var(--radius);
    background: var(--surface);
    cursor: pointer;
    text-align: center;
    transition: border-color 0.15s, background 0.15s;
    position: relative;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.05);
}

.drop-zone-text {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.drop-zone-text strong {
    color: var(--accent);
    font-weight: 500;
}

.drop-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.file-info {
    font-size: 0.8rem;
    color: var(--accent);
    margin-top: 0.5rem;
}

/* Select */
select {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9375rem;
    background: var(--surface);
    color: var(--text);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23888'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
}

select:focus {
    outline: none;
    border-color: var(--accent);
}

/* Buttons */
.btn-primary {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: var(--radius);
    background: var(--accent);
    color: #fff;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-secondary {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: transparent;
    color: var(--text);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: border-color 0.15s;
    margin-top: 0.5rem;
}

.btn-secondary:hover { border-color: var(--text-muted); }

button:focus-visible, select:focus-visible, a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Error */
.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-top: 1rem;
    font-size: 0.875rem;
}

/* Warning */
.warning {
    background: rgba(234, 179, 8, 0.1);
    border: 1px solid rgba(234, 179, 8, 0.2);
    color: #fcd34d;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    margin-top: 1rem;
    font-size: 0.8rem;
}

/* Progress */
.progress-status {
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 0.9375rem;
}

.copies-list {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.copy-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    font-size: 0.875rem;
}

.copy-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    flex-shrink: 0;
}

.badge-pending { background: #1f1f1f; color: #666; }
.badge-processing { background: rgba(59, 130, 246, 0.15); color: var(--accent); animation: pulse 1.5s infinite; }
.badge-completed { background: rgba(34, 197, 94, 0.15); color: var(--success); }
.badge-error { background: rgba(239, 68, 68, 0.15); color: var(--error); }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Results */
.results-list {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
    margin-bottom: 0.75rem;
}

.result-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    min-width: 0;
}

.result-item span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
    font-size: 0.8rem;
}

.btn-download {
    padding: 0.3rem 0.75rem;
    border: none;
    border-radius: 5px;
    background: var(--success);
    color: #000;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-download:hover { background: #16a34a; }

/* History */
.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: border-color 0.15s;
    min-width: 0;
}

.history-item:hover { border-color: #444; }

.history-item > div:first-child {
    min-width: 0;
    overflow: hidden;
}

.history-item > div:first-child > div:first-child {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.875rem;
}

.history-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 480px) {
    .container { padding: 1.5rem 0.75rem; }
    h1 { font-size: 1.3rem; }
}