/* ====================================================
   CONDUCTING TRAINER - Premium Dark UI
   Font: Inter via Google Fonts
   ==================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Playfair+Display:wght@700;900&display=swap');

:root {
    --bg-base:        #0a0b0f;
    --bg-surface:     #111318;
    --bg-elevated:    #1a1d24;
    --bg-card:        #1f2330;
    --accent:         #6c63ff;
    --accent-glow:    rgba(108, 99, 255, 0.35);
    --accent-2:       #00d4aa;
    --accent-2-glow:  rgba(0, 212, 170, 0.3);
    --danger:         #ff4757;
    --warning:        #ffa502;
    --gold:           #ffd700;
    --text-primary:   #f0f1f5;
    --text-secondary: #8b8fa8;
    --text-muted:     #555a72;
    --border:         rgba(255,255,255,0.07);
    --border-hover:   rgba(108, 99, 255, 0.4);
    --radius-sm:      8px;
    --radius-md:      14px;
    --radius-lg:      20px;
    --radius-xl:      28px;
    --shadow-card:    0 4px 24px rgba(0,0,0,0.5);
    --shadow-glow:    0 0 30px rgba(108,99,255,0.25);
    --transition:     all 0.25s cubic-bezier(0.4,0,0.2,1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
}

/* =====================
   PORTRAIT CONTAINER
   ===================== */
.portrait-container {
    width: 100%;
    max-width: 420px;
    height: 100%;
    max-height: 860px;
    background: var(--bg-surface);
    position: relative;
    box-shadow: 0 0 60px rgba(0,0,0,0.8), 0 0 0 1px var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-radius: 0;
}

@media (min-height: 860px) {
    .portrait-container {
        border-radius: 24px;
    }
}

/* =====================
   SCREENS
   ===================== */
.screen {
    display: none;
    flex-direction: column;
    height: 100%;
    width: 100%;
    position: absolute;
    top: 0; left: 0;
    overflow: hidden;
}
.screen.active {
    display: flex;
}

/* =====================
   LANDING SCREEN
   ===================== */
#landing-screen {
    background: linear-gradient(160deg, #0d0e14 0%, #12131a 40%, #0f1020 100%);
    justify-content: space-between;
    align-items: center;
    padding: 60px 30px 50px;
    position: relative;
    overflow: hidden;
}

#landing-screen::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    background: radial-gradient(circle, rgba(108,99,255,0.15) 0%, transparent 70%);
    pointer-events: none;
}

#landing-screen::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    bottom: 80px;
    right: -100px;
    background: radial-gradient(circle, rgba(0,212,170,0.08) 0%, transparent 70%);
    pointer-events: none;
}

.landing-content {
    text-align: center;
    z-index: 1;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 16px;
}

.landing-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent), #9b8fff);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.4rem;
    margin-bottom: 8px;
    box-shadow: 0 8px 32px rgba(108,99,255,0.4);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.light-brand {
    font-family: 'Playfair Display', serif;
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--text-primary);
    line-height: 1.1;
    letter-spacing: -0.5px;
}

.light-brand span {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.light-subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.2px;
}

.landing-footer {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    z-index: 1;
}

/* =====================
   BUTTONS
   ===================== */
.btn {
    border: none;
    padding: 14px 20px;
    border-radius: var(--radius-lg);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.2px;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0);
    transition: background 0.2s;
}

.btn:hover::after { background: rgba(255,255,255,0.05); }
.btn:active { transform: scale(0.98); }

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, #8b83ff 100%);
    color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px var(--accent-glow);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    border-color: var(--border-hover);
    background: var(--bg-card);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
.btn-ghost:hover {
    color: var(--text-primary);
    border-color: rgba(255,255,255,0.15);
    background: rgba(255,255,255,0.04);
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid rgba(255,71,87,0.3);
}
.btn-danger:hover {
    background: rgba(255,71,87,0.08);
    border-color: rgba(255,71,87,0.5);
}

/* Legacy class compatibility */
.light-btn { @extend .btn; }
.light-btn.primary { background: linear-gradient(135deg, var(--accent), #8b83ff); color: #fff; border: none; padding: 14px 20px; border-radius: var(--radius-lg); font-family: 'Inter', sans-serif; font-size: 0.95rem; font-weight: 600; cursor: pointer; width: 100%; transition: var(--transition); box-shadow: 0 4px 20px var(--accent-glow); }
.light-btn.primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px var(--accent-glow); }
.light-btn.secondary { background: var(--bg-elevated); color: var(--text-primary); border: 1px solid var(--border); padding: 14px 20px; border-radius: var(--radius-lg); font-family: 'Inter', sans-serif; font-size: 0.95rem; font-weight: 600; cursor: pointer; width: 100%; transition: var(--transition); }
.light-btn.secondary:hover { border-color: var(--border-hover); background: var(--bg-card); transform: translateY(-1px); }
.light-btn.shadow { box-shadow: var(--shadow-card); }

/* =====================
   BACK BUTTON
   ===================== */
.back-btn {
    position: absolute;
    top: 16px;
    left: 16px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 8px 14px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
    width: auto;
}
.back-btn:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.15);
}

/* =====================
   AUTH SCREENS
   ===================== */
#login-screen, #register-screen {
    background: var(--bg-surface);
    justify-content: center;
    align-items: center;
    padding: 30px;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 36px 28px;
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 340px;
    text-align: center;
    box-shadow: var(--shadow-card), 0 0 0 1px rgba(255,255,255,0.04);
}

.auth-card .auth-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
    display: block;
}

.auth-card h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.auth-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 28px;
    line-height: 1.5;
}

/* =====================
   INPUTS
   ===================== */
.light-input {
    width: 100%;
    padding: 13px 16px;
    margin-bottom: 14px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: var(--transition);
    box-sizing: border-box;
}
.light-input::placeholder { color: var(--text-muted); }
.light-input:focus {
    border-color: var(--accent);
    background: var(--bg-card);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.error-msg {
    color: var(--danger);
    font-size: 0.83rem;
    margin-top: 12px;
    min-height: 18px;
    text-align: center;
    font-weight: 500;
}

/* =====================
   MAIN MENU
   ===================== */
#main-menu {
    background: var(--bg-surface);
    justify-content: center;
    align-items: center;
    padding: 40px 30px;
    gap: 0;
    position: relative;
}

#main-menu::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(108,99,255,0.1) 0%, transparent 65%);
    pointer-events: none;
}

.menu-brand {
    text-align: center;
    margin-bottom: 8px;
    z-index: 1;
}

.menu-brand h1 {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.menu-brand h1 span {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

#user-greeting {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 8px 20px;
    margin-bottom: 32px;
    z-index: 1;
    display: inline-block;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    z-index: 1;
}

/* =====================
   SONG SELECTION & LEADERBOARD
   ===================== */
#song-selection, #leaderboard-screen {
    background: var(--bg-surface);
    padding: 0;
    overflow: hidden;
}

.screen-header {
    padding: 20px 24px 16px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.screen-header h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.screen-header p {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 2px;
}

.song-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    scrollbar-width: thin;
    scrollbar-color: var(--bg-card) transparent;
}

.song-list::-webkit-scrollbar { width: 4px; }
.song-list::-webkit-scrollbar-thumb { background: var(--bg-card); border-radius: 4px; }

.song-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.song-item::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--accent), var(--accent-2));
    border-radius: 3px 0 0 3px;
    opacity: 0;
    transition: opacity 0.2s;
}

.song-item:hover {
    border-color: var(--border-hover);
    background: var(--bg-elevated);
    transform: translateX(4px);
}

.song-item:hover::before { opacity: 1; }

.song-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.song-meta {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 4px;
    display: flex;
    gap: 8px;
}

.song-badge {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 4px 10px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.leaderboard-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 14px 16px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 14px;
    transition: var(--transition);
}

.leaderboard-item:hover {
    border-color: var(--border-hover);
    transform: translateX(3px);
}

.rank-badge {
    min-width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.rank-badge.gold   { background: rgba(255,215,0,0.15); color: #ffd700; border: 1px solid rgba(255,215,0,0.3); }
.rank-badge.silver { background: rgba(192,192,192,0.15); color: #c0c0c0; border: 1px solid rgba(192,192,192,0.3); }
.rank-badge.bronze { background: rgba(205,127,50,0.15); color: #cd7f32; border: 1px solid rgba(205,127,50,0.3); }
.rank-badge.normal { background: var(--bg-elevated); color: var(--text-muted); border: 1px solid var(--border); }

.score-badge {
    background: rgba(108,99,255,0.12);
    color: var(--accent);
    font-weight: 700;
    padding: 5px 12px;
    border-radius: 50px;
    font-size: 0.85rem;
    border: 1px solid rgba(108,99,255,0.3);
    min-width: 70px;
    text-align: center;
}

.screen-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
    background: var(--bg-elevated);
    flex-shrink: 0;
}

.screen-footer button {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 13px;
    border-radius: var(--radius-md);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    width: 100%;
    transition: var(--transition);
}
.screen-footer button:hover {
    color: var(--text-primary);
    border-color: rgba(255,255,255,0.15);
    background: var(--bg-elevated);
}

/* Legacy selectors */
#btn-back-to-menu, #btn-back-to-menu-leaderboard {
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 13px;
    font-family: 'Inter', sans-serif;
    width: 100%;
    margin-top: 0;
}

/* =====================
   GAME SCREEN
   ===================== */
#game-screen {
    padding: 0;
    position: relative;
    overflow: hidden;
    background: #000;
}

.hud {
    position: absolute;
    top: 16px;
    left: 16px;
    right: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: rgba(10, 11, 15, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    z-index: 10;
}

#score-display, #combo-display {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

#combo-display { color: var(--accent-2); }

.hud button {
    background: rgba(255,71,87,0.15);
    border: 1px solid rgba(255,71,87,0.3);
    color: var(--danger);
    padding: 5px 14px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    width: auto;
    margin: 0;
    transition: var(--transition);
}

.hud button:hover {
    background: rgba(255,71,87,0.25);
    border-color: rgba(255,71,87,0.5);
}

.video-container {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: #000;
    overflow: hidden;
}

video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1);
}

canvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 5;
    transform: scaleX(-1);
}

.controls {
    position: absolute;
    bottom: 20px;
    left: 16px;
    right: 16px;
    background: rgba(10,11,15,0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.08);
    padding: 16px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 10;
}

.controls label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.controls input[type="range"] {
    flex: 1;
    accent-color: var(--accent);
}

.controls select {
    flex: 1;
    padding: 5px 8px;
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: 'Inter', sans-serif;
    font-size: 0.82rem;
}

/* =====================
   RATING MODAL
   ===================== */
#rating-prompt {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 28px 24px;
    border-radius: var(--radius-xl);
    z-index: 99;
    text-align: center;
    width: 88%;
    max-width: 340px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.7), 0 0 0 1px rgba(255,255,255,0.04);
    backdrop-filter: blur(20px);
}

#rating-prompt h3 {
    font-family: 'Playfair Display', serif;
    color: var(--text-primary);
    font-size: 1.3rem;
    margin-bottom: 6px;
}

#rating-prompt p {
    color: var(--text-secondary);
    font-size: 0.82rem;
    margin-bottom: 18px;
}

#rating-stars {
    font-size: 36px;
    cursor: pointer;
    margin-bottom: 16px;
    letter-spacing: 4px;
}

#rating-stars span { color: var(--bg-elevated); transition: color 0.15s; }
#rating-stars span.active { color: var(--gold); }

#rating-review {
    width: 100%;
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    color: var(--text-primary);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    resize: none;
    outline: none;
    box-sizing: border-box;
    transition: border-color 0.2s;
}
#rating-review:focus { border-color: var(--accent); }

.rating-actions {
    margin-top: 18px;
    display: flex;
    gap: 10px;
}

.rating-actions button {
    flex: 1;
    padding: 11px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.rating-actions .btn-submit-rating {
    background: linear-gradient(135deg, var(--accent), #8b83ff);
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-glow);
}
.rating-actions .btn-submit-rating:hover { transform: translateY(-1px); }

.rating-actions .btn-skip-rating {
    background: var(--bg-elevated);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
.rating-actions .btn-skip-rating:hover { color: var(--text-primary); }

/* =====================
   MISC UTILITIES
   ===================== */
.admin-link {
    margin-top: 16px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.78rem;
    text-align: center;
    display: block;
    transition: color 0.2s;
}
.admin-link:hover { color: var(--text-secondary); }

button { margin: 0; }

/* =====================
   LOADING STATE
   ===================== */
.loading-text {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-align: center;
    padding: 24px;
    font-style: italic;
}

/* =====================
   LIGHT THEME OVERRIDES (compatibility)
   ===================== */
.light-theme {
    background: var(--bg-surface);
    color: var(--text-primary);
    justify-content: center;
    align-items: center;
}