:root {
    --bg-color: #f0f2f5;
    --card-bg: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --accent-color: #ff4757;
    --accent-hover: #ff6b81;
    --border-color: #e1e4e8;
    --input-bg: #f8f9fa;
    --player-bg: rgba(255, 255, 255, 0.95);
    --gradient-bg: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    padding-bottom: 120px;
    min-height: 100vh;
    background-image: var(--gradient-bg);
    background-attachment: fixed;
}

.main-container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 15px;
}

/* Header */
.app-header {
    text-align: center;
    margin-bottom: 2rem;
    animation: fadeInDown 0.8s ease;
}

.app-header h2 {
    font-weight: 700;
    background: linear-gradient(45deg, #ff4757, #ff6b81, #5352ed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

/* Search Card */
.search-card {
    background-color: var(--card-bg);
    border: 1px solid white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
    transition: transform 0.3s ease;
    backdrop-filter: blur(4px);
}

.search-card:hover {
    box-shadow: 0 12px 40px rgba(31, 38, 135, 0.25);
}

.form-control, .form-select {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 10px 15px;
}

.form-control:focus, .form-select:focus {
    background-color: #fff;
    color: var(--text-primary);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.25rem rgba(255, 71, 87, 0.25);
}

.btn-search {
    background: linear-gradient(45deg, #ff4757, #ff6b81);
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(255, 71, 87, 0.3);
}

.btn-search:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 71, 87, 0.4);
    background: linear-gradient(45deg, #ff6b81, #ff4757);
}

/* Results Area */
.results-card {
    background-color: transparent;
    border: none;
    margin-top: 2rem;
}

.song-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.2s ease;
    animation: fadeInUp 0.5s ease forwards;
    opacity: 0;
}

.song-item:hover {
    transform: translateX(5px);
    background-color: #f8f9fa;
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.song-info {
    flex-grow: 1;
    margin-right: 15px;
}

.song-name {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.song-artist {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.song-actions .btn-play {
    border-radius: 20px;
    padding: 5px 15px;
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.song-actions .btn-play:hover {
    background-color: var(--accent-color);
    color: white;
}

/* Player Bar */
.player-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--player-bg);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    padding: 15px 0;
    z-index: 1000;
    box-shadow: 0 -5px 20px rgba(0,0,0,0.5);
    transform: translateY(100%);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.player-bar.active {
    transform: translateY(0);
}

.player-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.current-track-info {
    display: flex;
    align-items: center;
    min-width: 200px;
}

.track-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-color), #ff6b81);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-size: 1.5rem;
    color: white;
    box-shadow: 0 4px 10px rgba(255, 71, 87, 0.3);
}

.track-details {
    display: flex;
    flex-direction: column;
}

.track-name {
    font-weight: bold;
    color: var(--text-primary);
}

.track-artist {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #bbb;
}

/* Loading Spinner */
.loading-container {
    display: none;
    text-align: center;
    padding: 40px;
}

.music-wave {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    height: 30px;
    gap: 5px;
}

.wave-bar {
    width: 6px;
    background-color: var(--accent-color);
    animation: wave 1s ease-in-out infinite;
}

.wave-bar:nth-child(2) { animation-delay: 0.1s; }
.wave-bar:nth-child(3) { animation-delay: 0.2s; }
.wave-bar:nth-child(4) { animation-delay: 0.3s; }
.wave-bar:nth-child(5) { animation-delay: 0.4s; }

@keyframes wave {
    0%, 100% { height: 5px; }
    50% { height: 30px; }
}