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

:root {
    --bg: #111118;
    --bg2: #1b1b28;
    --bg3: #2a2a3d;
    --surface: #22223a;
    --text: #eaeaf2;
    --text-dim: #9090a8;
    --accent: #7c5cfc;
    --accent-glow: rgba(124, 92, 252, 0.25);
    --accent-hover: #9b80ff;
    --orange: #e85d04;
    --orange-hover: #ff7a22;
    --danger: #ff4455;
    --success: #22dd66;
    --border: #35354d;
    --radius: 10px;
    --shadow: 0 2px 16px rgba(0,0,0,0.35);
}

html { font-size: 15px; }

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

/* ===== Nav ===== */
.topnav {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    padding: 1rem 2.5rem;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: 4px;
    background: linear-gradient(135deg, var(--accent), var(--orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 0.4rem;
}

.nav-link {
    color: var(--text-dim);
    text-decoration: none;
    padding: 0.55rem 1.3rem;
    border-radius: var(--radius);
    transition: all 0.2s ease;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.3px;
}

.nav-link:hover {
    color: var(--text);
    background: var(--bg3);
}

.nav-link.active {
    color: #fff;
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

/* ===== Pages ===== */
.page {
    display: none;
    padding: 2.5rem 2.5rem 4rem;
    max-width: 960px;
    margin: 0 auto;
    animation: fadeIn 0.25s ease;
}

.page.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.3rem;
    letter-spacing: -0.3px;
}

.page-header p {
    color: var(--text-dim);
    font-size: 0.9rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.65rem 1.4rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 700;
    font-size: 0.85rem;
    transition: all 0.2s ease;
    letter-spacing: 0.2px;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 2px 10px var(--accent-glow);
}
.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 20px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    background: var(--bg3);
    border-color: var(--accent);
}

.btn-accent {
    background: var(--orange);
    color: #fff;
    box-shadow: 0 2px 10px rgba(232, 93, 4, 0.25);
}
.btn-accent:hover {
    background: var(--orange-hover);
    transform: translateY(-1px);
}

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.85; }

.btn-small {
    padding: 0.35rem 0.8rem;
    font-size: 0.8rem;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    background: var(--bg3);
    color: var(--text);
    transition: all 0.15s ease;
}
.btn-small:hover { background: var(--border); }
.btn-small.btn-accent { background: var(--orange); color: #fff; }
.btn-small.btn-accent:hover { background: var(--orange-hover); }
.btn-small.btn-danger { background: var(--danger); color: #fff; }

.btn:disabled { opacity: 0.4; cursor: not-allowed; pointer-events: none; }

/* ===== Inputs ===== */
.input-field {
    padding: 0.65rem 1rem;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.9rem;
    outline: none;
    flex: 1;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-field:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-field::placeholder { color: var(--text-dim); opacity: 0.6; }

.input-small {
    width: 80px;
    padding: 0.4rem 0.5rem;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    text-align: center;
    font-size: 0.85rem;
    outline: none;
}
.input-small:focus { border-color: var(--accent); }

/* ===== Upload Zone ===== */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 16px;
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--surface);
}

.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--accent);
    background: rgba(124, 92, 252, 0.08);
    box-shadow: 0 0 30px var(--accent-glow);
}

.upload-icon {
    font-size: 3.5rem;
    margin-bottom: 0.75rem;
    display: block;
}

.upload-zone p {
    font-size: 1rem;
    font-weight: 600;
}

.upload-sub {
    color: var(--text-dim);
    font-size: 0.8rem !important;
    font-weight: 400 !important;
    margin-top: 0.4rem;
}

/* ===== Progress ===== */
.progress-section {
    margin: 2rem 0;
    padding: 1.25rem;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.progress-bar {
    height: 8px;
    background: var(--bg3);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--orange));
    width: 0%;
    transition: width 0.4s ease;
    border-radius: 4px;
}

#stems-status-text {
    color: var(--text-dim);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===== Stems Queue ===== */
.stems-queue {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin: 1.5rem 0;
}

.queue-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    transition: border-color 0.3s;
}

.queue-card.queue-processing { border-color: var(--accent); }
.queue-card.queue-done { border-color: var(--success); }
.queue-card.queue-failed { border-color: var(--danger); }

.queue-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.queue-filename { font-weight: 600; font-size: 0.9rem; }

.queue-status {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-dim);
}

.queue-card.queue-processing .queue-status { color: var(--accent); }
.queue-card.queue-done .queue-status { color: var(--success); }
.queue-card.queue-failed .queue-status { color: var(--danger); }

.queue-info {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 0.4rem;
}

/* ===== Stems Results ===== */
.stems-result-section {
    margin-bottom: 2rem;
    padding: 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.stems-result-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--accent);
}

.stems-dl-all {
    text-align: center;
    margin-top: 1rem;
}

/* ===== Song Library ===== */
.stems-library {
    margin-top: 2rem;
}

.library-title {
    font-size: 1.1rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-dim);
    margin-bottom: 1.25rem;
}

.song-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.song-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
}

.song-name {
    font-size: 1rem;
    font-weight: 700;
}

.song-id {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-left: 0.75rem;
    font-family: monospace;
}

.song-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-sm {
    padding: 0.4rem 0.9rem;
    font-size: 0.8rem;
}

.song-stems-waves {
    padding: 0.75rem 1.25rem;
}

.stem-row {
    margin-bottom: 0.5rem;
}

.stem-row-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.25rem;
}

.stem-label {
    text-transform: capitalize;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

.stem-waveform {
    height: 48px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--bg);
}

.song-download-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border);
    background: rgba(0,0,0,0.15);
}

.stem-checks {
    display: flex;
    gap: 1rem;
}

.stem-check {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
    font-size: 0.85rem;
}

.stem-check input[type="checkbox"] {
    accent-color: var(--accent);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.stem-check-name {
    text-transform: capitalize;
    font-weight: 600;
}

/* ===== Lyrics ===== */
.lyrics-input-row {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.lyrics-preview {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.lyrics-meta {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.lyrics-textarea {
    width: 100%;
    min-height: 320px;
    padding: 1.25rem;
    background: var(--bg);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 1rem;
    line-height: 1.9;
    resize: vertical;
    font-family: inherit;
    transition: border-color 0.2s;
}

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

.lyrics-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.saved-list {
    margin-top: 1rem;
}

.saved-list h3 {
    margin-bottom: 1rem;
    color: var(--text-dim);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 700;
}

.saved-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.saved-item:hover {
    background: var(--bg3);
    border-color: var(--accent);
    transform: translateX(4px);
}

.saved-item .saved-title { font-weight: 600; }
.saved-item .saved-artist { color: var(--text-dim); font-size: 0.85rem; margin-left: 0.5rem; }
.saved-item .saved-actions { display: flex; gap: 0.4rem; }

/* ===== Hidden attribute must win ===== */
[hidden] { display: none !important; }

/* ===== Teleprompter ===== */
.teleprompter-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #000;
    z-index: 999;
    display: flex;
    flex-direction: column;
}

.teleprompter-controls {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1rem 2rem;
    background: rgba(15, 15, 25, 0.95);
    border-bottom: 1px solid #2a2a3d;
    backdrop-filter: blur(8px);
}

.tp-title {
    font-weight: 700;
    flex: 1;
    font-size: 1rem;
}

.tp-speed {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#tp-speed-label {
    font-size: 0.85rem;
    color: var(--text-dim);
    min-width: 80px;
    text-align: center;
    font-weight: 600;
}

.teleprompter-content {
    flex: 1;
    overflow-y: auto;
    padding: 4rem 12%;
    font-size: 2.4rem;
    line-height: 2.2;
    white-space: pre-wrap;
    text-align: center;
    color: #fff;
    font-weight: 300;
}

/* ===== Mixer ===== */
.mixer-controls { margin-bottom: 1.5rem; }

.mixer-project-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.mixer-upload-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border);
}

.mixer-export-controls {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.mixer-export-controls label {
    font-size: 0.85rem;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 500;
}

.mixer-track-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.mixer-track {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    cursor: grab;
    transition: all 0.2s ease;
}

.mixer-track:hover { border-color: var(--accent); }
.mixer-track:active { cursor: grabbing; }
.mixer-track.sortable-ghost { opacity: 0.3; }
.mixer-track.sortable-chosen { box-shadow: 0 8px 30px rgba(0,0,0,0.4); }

.mixer-track-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.mixer-track-header .track-name {
    font-weight: 700;
    font-size: 0.9rem;
}

.mixer-track-header .track-pos {
    color: var(--text-dim);
    font-size: 0.8rem;
    background: var(--bg3);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
}

.mixer-waveform {
    height: 80px;
    margin-bottom: 0.75rem;
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg);
}

.mixer-track-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-dim);
    flex-wrap: wrap;
}

.mixer-track-controls label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 500;
}

.region-label {
    font-weight: 600;
    color: var(--accent);
    font-size: 0.85rem;
    min-width: 120px;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.8rem 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 1000;
    box-shadow: var(--shadow);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translate(-50%, 10px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

.toast.toast-error { border-color: var(--danger); color: var(--danger); }
.toast.toast-success { border-color: var(--success); color: var(--success); }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== Selection ===== */
::selection {
    background: var(--accent);
    color: #fff;
}