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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #1db954 0%, #191414 100%);
    color: white;
    height: 100vh;
    overflow: hidden;
}

#app {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.screen {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none !important;
}

/* Login Screen */
.login-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    text-align: center;
}

.login-container h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.login-container p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.8;
    max-width: 300px;
}

/* Main App Layout */
#main-app {
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Buttons */
.btn-primary {
    background: #1db954;
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    background: #1ed760;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: white;
    color: #191414;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    flex-shrink: 0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

/* Navigation */
.nav-tabs {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    margin: 0.5rem 1rem;
    border-radius: 25px;
    padding: 0.25rem;
    flex-shrink: 0;
}

.nav-tab {
    flex: 1;
    background: transparent;
    color: white;
    border: none;
    padding: 0.6rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.9rem;
}

.nav-tab.active {
    background: rgba(255, 255, 255, 0.2);
}

/* Content Area */
.tab-content {
    display: none;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
}

/* Search */
.search-container {
    display: flex;
    margin: 0.5rem 1rem;
    gap: 0.5rem;
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 0.95rem;
    outline: none;
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.search-btn {
    background: #1db954;
    color: white;
    border: none;
    padding: 0.75rem 1.25rem;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1.1rem;
}

/* Results */
.results-container {
    flex: 1;
    padding: 0.5rem 1rem;
    overflow-y: auto;
    min-height: 0;
    -webkit-overflow-scrolling: touch;
}

.track-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    margin-bottom: 0.5rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.track-item:hover {
    background: rgba(255, 255, 255, 0.2);
}

.track-item.playing {
    background: rgba(29, 185, 84, 0.3);
    border: 2px solid #1db954;
}

.track-image {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    object-fit: cover;
    margin-right: 0.75rem;
    flex-shrink: 0;
}

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

.track-name {
    font-weight: 600;
    margin-bottom: 0.2rem;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-artist {
    opacity: 0.7;
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.like-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.3rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.like-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.like-btn.liked {
    color: #1db954;
}

/* Current Track Info */
.current-track-info {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.3);
    flex-shrink: 0;
}

.current-track-image {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    object-fit: cover;
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.current-track-details {
    flex: 1;
    min-width: 0;
}

.current-track-name {
    font-weight: 600;
    margin-bottom: 0.2rem;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.current-track-artist {
    opacity: 0.7;
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Player Controls */
.player-controls {
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    padding: 1rem;
    flex-shrink: 0;
}

.progress-container {
    margin-bottom: 0.75rem;
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    margin-bottom: 0.4rem;
    cursor: pointer;
}

.progress {
    height: 100%;
    background: #1db954;
    border-radius: 2px;
    width: 0%;
    transition: width 0.1s ease;
}

.time-display {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    opacity: 0.7;
}

.control-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 0.75rem;
}

.control-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.6rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

.play-btn {
    font-size: 2rem;
}

.volume-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
}

.volume-slider {
    flex: 1;
    -webkit-appearance: none;
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.2);
    outline: none;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #1db954;
    cursor: pointer;
}

.volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #1db954;
    cursor: pointer;
    border: none;
}

/* Loading */
.loading {
    text-align: center;
    padding: 2rem;
    opacity: 0.7;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid #1db954;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* Make sure everything fits on mobile */
@media (max-height: 700px) {
    .app-header {
        padding: 0.5rem 1rem;
    }
    
    .nav-tabs {
        margin: 0.4rem 1rem;
    }
    
    .nav-tab {
        padding: 0.5rem;
    }
    
    .current-track-info {
        padding: 0.6rem 1rem;
    }
    
    .player-controls {
        padding: 0.75rem 1rem;
    }
    
    .control-buttons {
        margin-bottom: 0.5rem;
    }
}