/* ============================================================
   KARAOKE APP - MOBILE FIRST CSS
   ============================================================ */

:root {
    --primary: #1DB954;
    --primary-dark: #1ed760;
    --secondary: #191414;
    --accent: #ff6b6b;
    --bg-dark: #121212;
    --bg-card: #282828;
    --bg-input: #333333;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --success: #1DB954;
    --danger: #ff4444;
    --warning: #ffaa00;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ============================================================
   SCREEN MANAGEMENT
   ============================================================ */
.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

/* ============================================================
   LOGIN SCREEN
   ============================================================ */
#login-screen {
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a1a2e 100%);
    padding: 20px;
}

.login-container {
    text-align: center;
    width: 100%;
    max-width: 320px;
}

.logo {
    margin-bottom: 40px;
}

.logo-icon {
    font-size: 72px;
    display: block;
    margin-bottom: 16px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-form label {
    font-size: 18px;
    color: var(--text-secondary);
}

.login-form input {
    padding: 16px;
    font-size: 18px;
    border: 2px solid var(--bg-input);
    border-radius: 12px;
    background: var(--bg-card);
    color: var(--text-primary);
    text-align: center;
    outline: none;
    transition: border-color 0.3s;
}

.login-form input:focus {
    border-color: var(--primary);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
    padding: 16px 32px;
    font-size: 18px;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    background: var(--primary);
    color: var(--secondary);
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: scale(1.02);
}

.btn-primary:disabled {
    background: var(--bg-input);
    color: var(--text-secondary);
    cursor: not-allowed;
}

.btn-secondary {
    padding: 12px 24px;
    font-size: 16px;
    border: 2px solid var(--text-secondary);
    border-radius: 50px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-search {
    width: 56px;
    height: 56px;
    border: none;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    transition: transform 0.2s;
}

.btn-search:active {
    transform: scale(0.95);
}

/* ============================================================
   APP HEADER
   ============================================================ */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--secondary);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-title {
    font-size: 18px;
    font-weight: 700;
    user-select: none;
    cursor: default;
}

.user-badge {
    font-size: 14px;
    padding: 6px 12px;
    background: var(--bg-card);
    border-radius: 20px;
}

.connection-status {
    font-size: 20px;
}

/* ============================================================
   SEARCH SECTION
   ============================================================ */
.app-content {
    flex: 1;
    padding: 20px;
    padding-bottom: 100px;
}

.search-section {
    margin-bottom: 24px;
}

.search-box {
    display: flex;
    gap: 12px;
    align-items: center;
}

.search-box input {
    flex: 1;
    padding: 14px 20px;
    font-size: 16px;
    border: none;
    border-radius: 50px;
    background: var(--bg-card);
    color: var(--text-primary);
    outline: none;
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

/* ============================================================
   SEARCH RESULTS
   ============================================================ */
.search-results h3 {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.results-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.result-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 12px;
    transition: background 0.2s;
}

.result-item:active {
    background: var(--bg-input);
}

.result-image {
    width: 56px;
    height: 56px;
    border-radius: 8px;
    object-fit: cover;
    background: var(--bg-input);
}

.result-info {
    flex: 1;
    min-width: 0;
}

.result-title {
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-artist {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-add {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background: var(--primary);
    color: var(--secondary);
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
    flex-shrink: 0;
}

.result-add:active {
    transform: scale(0.9);
}

/* ============================================================
   MY SONG SECTION
   ============================================================ */
.my-song-section {
    margin-bottom: 24px;
}

.song-card {
    padding: 16px;
    background: linear-gradient(135deg, var(--primary) 0%, #1ed760 100%);
    border-radius: 12px;
    color: var(--secondary);
}

.song-card .song-title {
    font-size: 18px;
    font-weight: 700;
}

.song-card .song-artist {
    font-size: 14px;
    opacity: 0.8;
}

/* ============================================================
   QUEUE SECTION
   ============================================================ */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.section-header h3 {
    font-size: 18px;
    font-weight: 700;
}

.queue-count {
    background: var(--primary);
    color: var(--secondary);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.queue-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.queue-empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px 20px;
    font-size: 15px;
}

.queue-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 12px;
    position: relative;
}

.queue-position {
    width: 32px;
    height: 32px;
    background: var(--bg-input);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.queue-item.mine {
    border: 2px solid var(--primary);
}

.queue-item.mine .queue-position {
    background: var(--primary);
    color: var(--secondary);
}

.queue-singer {
    font-size: 12px;
    color: var(--primary);
    margin-top: 2px;
}

/* ============================================================
   YOUR TURN SCREEN
   ============================================================ */
#your-turn-screen {
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #2d1f1f 100%);
}

.your-turn-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.pulse-ring {
    position: absolute;
    width: 200px;
    height: 200px;
    border: 4px solid var(--accent);
    border-radius: 50%;
    animation: pulseRing 2s ease-out infinite;
}

@keyframes pulseRing {
    0% { transform: scale(0.8); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

.your-turn-content {
    text-align: center;
    z-index: 1;
    padding: 20px;
}

.your-turn-icon {
    font-size: 80px;
    display: block;
    margin-bottom: 16px;
}

.your-turn-content h2 {
    font-size: 32px;
    margin-bottom: 24px;
    color: var(--accent);
}

.your-turn-song-info {
    margin-bottom: 32px;
}

.turn-song-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.turn-song-artist {
    font-size: 18px;
    color: var(--text-secondary);
}

.btn-mic {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 20px 40px;
    font-size: 20px;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    background: var(--accent);
    color: white;
    cursor: pointer;
    margin-bottom: 16px;
    transition: all 0.3s;
}

.btn-mic:active {
    transform: scale(0.95);
}

.btn-mic.active {
    background: var(--success);
    animation: glow 1s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(29, 185, 84, 0.5); }
    50% { box-shadow: 0 0 40px rgba(29, 185, 84, 0.8); }
}

.mic-icon {
    font-size: 28px;
}

/* ============================================================
   TOAST NOTIFICATION
   ============================================================ */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    padding: 14px 24px;
    background: var(--success);
    color: var(--secondary);
    border-radius: 50px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 1000;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateX(-50%) translateY(20px); opacity: 0; }
    to { transform: translateX(-50%) translateY(0); opacity: 1; }
}

.toast.error {
    background: var(--danger);
    color: white;
}

/* ============================================================
   ADMIN PANEL
   ============================================================ */
.admin-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.admin-panel {
    background: var(--bg-card);
    padding: 32px;
    border-radius: 16px;
    width: 90%;
    max-width: 320px;
    text-align: center;
}

.admin-panel h2 {
    margin-bottom: 24px;
}

.admin-login {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.admin-login input {
    padding: 14px;
    font-size: 16px;
    border: 2px solid var(--bg-input);
    border-radius: 12px;
    background: var(--bg-dark);
    color: var(--text-primary);
    text-align: center;
}

.admin-controls {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Admin Status */
.admin-status {
    padding: 12px;
    background: var(--bg-dark);
    border-radius: 12px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.status-dot.green {
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
}

.status-dot.red {
    background: var(--danger);
    box-shadow: 0 0 10px var(--danger);
}

/* Admin Toggle */
.admin-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: var(--bg-dark);
    border-radius: 12px;
}

.switch {
    position: relative;
    width: 52px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-input);
    border-radius: 28px;
    transition: 0.3s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: 0.3s;
}

input:checked + .slider {
    background: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

/* Admin Buttons */
.admin-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn-admin {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-admin:active {
    transform: scale(0.98);
}

.btn-skip {
    background: var(--warning);
    color: var(--secondary);
}

.btn-volume {
    background: var(--accent);
    color: white;
}

.btn-clear {
    background: var(--danger);
    color: white;
}

/* Admin Stats */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    padding: 16px;
    background: var(--bg-dark);
    border-radius: 12px;
}

.stat-item {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.stat-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}