/* AudiOhm - Modern Neon Cyberpunk Theme 2.0 */
:root {
    --bg-dark: #0A0E27;
    --bg-darker: #050814;
    --bg-card: rgba(15, 23, 50, 0.6);
    --bg-card-hover: rgba(15, 23, 50, 0.8);
    --primary: #00F0FF;
    --secondary: #BF00FF;
    --accent: #FF006E;
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0C0;
    --border: rgba(0, 240, 255, 0.2);
    --glow-primary: 0 0 20px rgba(0, 240, 255, 0.5);
    --glow-secondary: 0 0 20px rgba(191, 0, 255, 0.5);
    --glass-bg: rgba(10, 14, 39, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Segoe UI', 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    overflow: hidden;
    position: relative;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 80%, rgba(0, 240, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(191, 0, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(255, 0, 110, 0.05) 0%, transparent 50%);
    animation: gradientShift 20s ease infinite;
    z-index: -1;
}

@keyframes gradientShift {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(120deg); }
    66% { transform: translate(-20px, 20px) rotate(240deg); }
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-dark);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.spinner {
    width: 80px;
    height: 80px;
    position: relative;
}

.spinner::before,
.spinner::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 4px solid transparent;
}

.spinner::before {
    border-top-color: var(--primary);
    animation: spin 1s linear infinite;
}

.spinner::after {
    border-bottom-color: var(--secondary);
    animation: spin 1.5s linear infinite reverse;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-screen h2 {
    margin-top: 2rem;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Screens */
.screen {
    width: 100%;
    height: 100vh;
    animation: slideIn 0.5s ease;
}

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

.screen.hidden {
    display: none !important;
}

/* Login Screen */
.login-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    padding: 2rem;
}

.logo {
    font-size: 4rem;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: logoGlow 3s ease-in-out infinite;
    text-align: center;
}

@keyframes logoGlow {
    0%, 100% { filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.5)); }
    33% { filter: drop-shadow(0 0 30px rgba(191, 0, 255, 0.7)); }
    66% { filter: drop-shadow(0 0 25px rgba(255, 0, 110, 0.6)); }
}

.login-form {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 3rem 2rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4),
                var(--glow-primary);
    width: 100%;
    max-width: 420px;
    animation: formAppear 0.6s ease;
}

@keyframes formAppear {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group::before {
    content: '\f007';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.form-group:has(input[type="password"])::before {
    content: '\f023';
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(0, 240, 255, 0.05);
    box-shadow: var(--glow-primary);
}

.form-group:has(input:focus)::before {
    color: var(--primary);
}

.btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--glow-primary), 0 10px 30px rgba(0, 240, 255, 0.3);
}

.btn:hover::before {
    left: 100%;
}

.btn:active {
    transform: translateY(-1px);
}

.register-link {
    margin-top: 1.5rem;
    text-align: center;
    color: var(--text-secondary);
}

.register-link a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    position: relative;
}

.register-link a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.register-link a:hover::after {
    width: 100%;
}

.error-message {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(255, 0, 110, 0.1);
    border: 1px solid var(--accent);
    border-radius: 12px;
    color: var(--accent);
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-10px); }
    40%, 80% { transform: translateX(10px); }
}

/* Main App */
#main-app {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-darker);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 2rem 1rem;
    position: relative;
    overflow: hidden;
}

.sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.sidebar-header {
    margin-bottom: 3rem;
}

.sidebar-header .logo {
    font-size: 2rem;
    margin-bottom: 0;
    text-align: left;
}

.sidebar-nav {
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 1rem 1.2rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 12px;
    margin-bottom: 0.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.nav-item:hover,
.nav-item.active {
    background: rgba(0, 240, 255, 0.1);
    color: var(--primary);
    transform: translateX(5px);
}

.nav-item:hover::before,
.nav-item.active::before {
    transform: scaleY(1);
}

.nav-item i {
    margin-right: 1rem;
    width: 24px;
    font-size: 1.2rem;
}

.sidebar-footer {
    margin-top: auto;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: rgba(255, 0, 110, 0.1);
    border-color: var(--accent);
    color: var(--accent);
}

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 3rem;
    padding-bottom: 140px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.main-content::-webkit-scrollbar {
    width: 8px;
}

.main-content::-webkit-scrollbar-track {
    background: transparent;
}

.main-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.main-content::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

.page {
    display: none;
    animation: pageFadeIn 0.4s ease;
}

@keyframes pageFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page.active {
    display: block;
}

.page-header {
    margin-bottom: 3rem;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* Sections */
.section {
    margin-bottom: 4rem;
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.section h2::before {
    content: '';
    width: 4px;
    height: 2rem;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 2px;
}

/* Search Bar */
.search-bar {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    position: relative;
}

.search-bar input {
    flex: 1;
    padding: 1.2rem 1.5rem;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 2px solid var(--border);
    border-radius: 15px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--glow-primary);
    transform: scale(1.01);
}

.search-bar button {
    width: auto;
    padding: 0 2.5rem;
}

/* Track List */
.track-list {
    display: grid;
    gap: 1rem;
}

.track-card {
    display: flex;
    align-items: center;
    padding: 1.2rem;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 15px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.track-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.track-card:hover {
    border-color: var(--primary);
    box-shadow: var(--glow-primary), 0 10px 30px rgba(0, 240, 255, 0.2);
    transform: translateY(-3px) scale(1.01);
}

.track-card:hover::before {
    transform: scaleX(1);
}

.track-cover {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 12px;
    margin-right: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.track-info {
    flex: 1;
}

.track-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}

.track-artist {
    color: var(--text-secondary);
    font-size: 1rem;
}

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

.track-actions {
    display: flex;
    gap: 0.8rem;
}

.btn-play-track {
    padding: 0.6rem 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 10px;
    color: white;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-play-track:hover {
    transform: scale(1.05);
    box-shadow: var(--glow-primary);
}

/* Playlist List */
.playlist-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 2rem;
}

.playlist-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 15px;
    padding: 1.2rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.playlist-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(191, 0, 255, 0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.playlist-card:hover {
    border-color: var(--primary);
    box-shadow: var(--glow-primary), 0 15px 40px rgba(0, 240, 255, 0.3);
    transform: translateY(-8px) scale(1.02);
}

.playlist-card:hover::before {
    opacity: 1;
}

.playlist-cover {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 1rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.playlist-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    position: relative;
}

.playlist-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    position: relative;
}

/* Player */
.player {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    padding: 1.2rem 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    z-index: 1000;
    box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.3);
}

.player::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

/* Hide player on login screen */
#login-screen .player,
body:not(:has(#main-app.visible)) .player {
    display: none !important;
}

#main-app.visible .player {
    display: flex !important;
    animation: playerSlideUp 0.5s ease;
}

@keyframes playerSlideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.player-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 280px;
}

.player-cover {
    width: 70px;
    height: 70px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease;
}

.player-cover:hover {
    transform: scale(1.1);
}

.player-details {
    flex: 1;
}

.player-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.player-artist {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    flex: 1;
    justify-content: center;
}

.btn-control {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0.5rem;
    border-radius: 50%;
}

.btn-control:hover {
    color: var(--primary);
    background: rgba(0, 240, 255, 0.1);
    transform: scale(1.1);
}

.btn-play {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 240, 255, 0.4);
}

.btn-play:hover {
    transform: scale(1.15);
    box-shadow: var(--glow-primary), 0 8px 25px rgba(0, 240, 255, 0.6);
}

.player-progress {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 1rem;
    max-width: 500px;
}

.progress-bar,
.volume-bar {
    flex: 1;
    height: 5px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.progress-bar:hover,
.volume-bar:hover {
    height: 7px;
}

.progress-bar::-webkit-slider-thumb,
.volume-bar::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
    transition: transform 0.2s ease;
}

.progress-bar::-webkit-slider-thumb:hover,
.volume-bar::-webkit-slider-thumb:hover {
    transform: scale(1.3);
}

.time {
    font-size: 0.85rem;
    color: var(--text-secondary);
    min-width: 45px;
    font-weight: 600;
}

.player-volume {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    min-width: 160px;
}

.player-volume i {
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.player-volume:hover i {
    color: var(--primary);
}

.player-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.player-actions .btn-control {
    font-size: 1.2rem;
}

.player-actions #like-btn.liked {
    color: var(--accent);
}

.player-actions #like-btn.liked i {
    font-weight: 900;
}

/* Loading States */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg,
        rgba(255, 255, 255, 0.05) 0%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(255, 255, 255, 0.05) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.toast {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    padding: 1rem 1.5rem;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    animation: toastSlideIn 0.4s ease;
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 300px;
}

@keyframes toastSlideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left-color: #00FF88;
}

.toast.error {
    border-left-color: var(--accent);
}

.toast i {
    font-size: 1.5rem;
}

.toast.success i {
    color: #00FF88;
}

.toast.error i {
    color: var(--accent);
}

/* Responsive */
@media (max-width: 1024px) {
    .main-content {
        padding: 2rem;
    }

    .page-header h1 {
        font-size: 2.5rem;
    }

    .playlist-list {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -280px;
        z-index: 1001;
        transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .sidebar.open {
        left: 0;
        box-shadow: 5px 0 30px rgba(0, 0, 0, 0.5);
    }

    .main-content {
        padding: 1.5rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .player {
        flex-wrap: wrap;
        padding: 1rem;
        gap: 1rem;
    }

    .player-info {
        min-width: auto;
        flex: 1;
    }

    .player-cover {
        width: 50px;
        height: 50px;
    }

    .player-controls {
        order: 3;
        width: 100%;
        justify-content: space-around;
    }

    .player-progress {
        max-width: none;
        order: 2;
        flex: 1;
    }

    .player-volume {
        display: none;
    }

    .playlist-list {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }

    .track-card {
        flex-wrap: wrap;
    }

    .track-cover {
        width: 60px;
        height: 60px;
    }
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 1002;
    background: var(--primary);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    color: var(--bg-dark);
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--glow-primary);
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* Scroll Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

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

/* Hover Effects */
.hover-glow {
    transition: all 0.3s ease;
}

.hover-glow:hover {
    box-shadow: var(--glow-primary);
}