/* Karaoke Studio — Dark Studio Theme */
:root {
    --bg-primary: #0d0d12;
    --bg-secondary: #14141c;
    --bg-surface: #1a1a26;
    --bg-elevated: #22222f;
    --bg-hover: #2a2a3a;
    --text-primary: #e8e6f0;
    --text-secondary: #9490a8;
    --text-muted: #5e5a72;
    --accent: #7c6df0;
    --accent-glow: #7c6df066;
    --accent-light: #a89df5;
    --success: #3dd68c;
    --warning: #f0b840;
    --danger: #f05050;
    --info: #50a8f0;
    --border: #2a2838;
    --border-focus: #7c6df080;
    --font-body: 'Be Vietnam Pro', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 14px;
}

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

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: var(--accent-light); text-decoration: none; }
a:hover { color: var(--accent); }

/* Topbar */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 56px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 16px;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 22px;
    color: var(--accent);
    text-shadow: 0 0 16px var(--accent-glow);
}

.logo-text { letter-spacing: -0.5px; }

nav { display: flex; gap: 4px; }

.nav-link {
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.15s;
}

.nav-link:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-link.active { background: var(--accent); color: #fff; }

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

/* Cards */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 16px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.3px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    font-family: var(--font-body);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.btn-primary:hover { background: #6b5ce0; box-shadow: 0 0 20px var(--accent-glow); }

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

.btn-success { background: var(--success); color: #0d0d12; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 12px; }

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-body);
    transition: border-color 0.15s;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-textarea {
    min-height: 200px;
    resize: vertical;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.7;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%239490a8' stroke-width='1.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* Upload zone */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}
.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-glow);
}
.upload-zone-icon { font-size: 40px; margin-bottom: 12px; display: block; }
.upload-zone-text { font-size: 14px; color: var(--text-secondary); }

/* Project list */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 16px;
}

.project-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: all 0.15s;
    cursor: pointer;
}
.project-card:hover {
    border-color: var(--accent);
    box-shadow: 0 0 24px var(--accent-glow);
    transform: translateY(-2px);
}

.project-card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.project-card-meta {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--text-muted);
}

.badge {
    display: inline-flex;
    padding: 2px 8px;
    border-radius: 99px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.badge-draft { background: var(--text-muted); color: var(--bg-primary); }
.badge-analyzing { background: var(--info); color: #fff; }
.badge-timing_ready { background: var(--warning); color: #0d0d12; }
.badge-rendering { background: var(--accent); color: #fff; }
.badge-done { background: var(--success); color: #0d0d12; }
.badge-error { background: var(--danger); color: #fff; }

/* Progress bar */
.progress {
    height: 6px;
    background: var(--bg-elevated);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 8px;
}
.progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 0.3s;
}

/* Flex utilities */
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 13px; }
.text-mono { font-family: var(--font-mono); font-size: 12px; }

/* Row layout */
.row { display: flex; gap: 16px; }
.col { flex: 1; }

/* Responsive */
@media (max-width: 768px) {
    .container { padding: 16px; }
    .row { flex-direction: column; }
    .project-grid { grid-template-columns: 1fr; }
}