/* 
 * MoozicOrb Main Stylesheet
 * Modern Music Platform UI inspired by Spotify & Apple Music
 */

/* Variables for consistent styling */
:root {
    /* Spotify-inspired color palette */
    --color-primary: #1db954; /* Spotify green */
    --color-primary-dark: #1ed760;
    --color-primary-light: rgba(29, 185, 84, 0.1);
    --color-secondary: #ff6b35; /* Vibrant orange accent */
    --color-secondary-dark: #e55a2b;
    
    /* Dark theme colors */
    --color-bg-primary: #121212; /* Spotify dark background */
    --color-bg-secondary: #181818;
    --color-bg-tertiary: #282828;
    --color-surface: #1e1e1e;
    --color-surface-hover: #2a2a2a;
    
    /* Text colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #b3b3b3;
    --color-text-muted: #6a6a6a;
    --color-white: #ffffff;
    
    /* Status colors */
    --color-success: #1db954;
    --color-warning: #ffa726;
    --color-error: #f44336;
    
    /* Typography */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Border radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --border-radius-full: 50px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(29, 185, 84, 0.3);
    
    /* Layout dimensions */
    --navbar-height: 64px;
    --sidebar-width: 240px;
    --sidebar-collapsed-width: 72px;
    --player-height: 90px;

    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
}

/* Base Styles & Reset */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    height: 100%;
}

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
}

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

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-surface);
    border-radius: var(--border-radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-surface-hover);
}

/* Layout Components */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xl);
    position: relative;
    padding-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    border-radius: var(--border-radius-full);
}

/* Cards */
.card {
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(29, 185, 84, 0.3);
}

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -var(--spacing-md);
}

.col {
    padding: 0 var(--spacing-md);
    flex: 1;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-full);
    font-weight: var(--font-weight-semibold);
    font-size: 0.95rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    min-height: 44px; /* Touch target size */
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

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

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn--secondary {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn--secondary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn--outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-glow);
}

.btn--ghost {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
    backdrop-filter: blur(10px);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Navigation - Fixed Header */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    transition: all var(--transition-normal);
}

.navbar__logo {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.navbar__logo:hover {
    color: var(--color-primary-dark);
}

.navbar__brand-globe {
    display: flex;
    align-items: center;
}

.navbar__logo-rb {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-full);
    font-weight: var(--font-weight-bold);
    font-size: 0.875rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.navbar__logo-rb:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.navbar__auth-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.navbar__toggler {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
}

.navbar__toggler:hover {
    background: rgba(255, 255, 255, 0.1);
}

.hamburger-menu {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.hamburger-menu span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: var(--border-radius-full);
    transition: all var(--transition-fast);
}

/* Sidebar Navigation */
.sidebar {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--navbar-height));
    background: rgba(24, 24, 24, 0.95);
    backdrop-filter: blur(20px);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 900;
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar__profile {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar__profile-image {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--spacing-md);
    border: 3px solid var(--color-primary);
    transition: all var(--transition-normal);
}

.sidebar__profile-image:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.sidebar__follow-info {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.sidebar__profile-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.sidebar__search {
    position: relative;
    margin-bottom: var(--spacing-xl);
}

.search-bar {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-md) 3rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-full);
    color: var(--color-text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.search-bar:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(29, 185, 84, 0.2);
    background: rgba(255, 255, 255, 0.15);
}

.search-bar::placeholder {
    color: var(--color-text-muted);
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: 1rem;
}

.sidebar__nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar__nav li {
    margin-bottom: var(--spacing-sm);
}

.sidebar__nav a {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
}

.sidebar__nav a:hover,
.sidebar__nav a.active {
    color: var(--color-text-primary);
    background: rgba(29, 185, 84, 0.1);
    transform: translateX(4px);
}

.sidebar__nav a.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--color-primary);
    border-radius: var(--border-radius-full);
}

/* Main Content Area */
main {
    margin-left: var(--sidebar-width);
    padding: calc(var(--navbar-height) + var(--spacing-lg)) var(--spacing-lg) var(--spacing-lg);
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
}

/* Content Sections */
.content-section {
    margin-bottom: var(--spacing-2xl);
}

.announcement-banner {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    padding: var(--spacing-md);
    text-align: center;
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.announcement-banner__text {
    font-weight: var(--font-weight-medium);
    margin: 0;
}

/* Navigation Menu */
.navbar__menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar__item {
    margin-left: var(--spacing-lg);
}

.navbar__link {
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    position: relative;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
}

.navbar__link:hover {
    color: var(--color-primary);
    background-color: rgba(29, 185, 84, 0.1);
}

.navbar__link.active {
    color: var(--color-primary);
    background-color: rgba(29, 185, 84, 0.15);
}

.navbar__toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
    transition: background-color var(--transition-normal);
}

.navbar__toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--navbar-height));
    background: var(--color-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 900;
    padding: var(--spacing-lg);
    transition: transform var(--transition-normal);
    overflow-y: auto;
}

.sidebar__profile {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar__avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--spacing-md);
    border: 3px solid var(--color-primary);
    box-shadow: 0 4px 20px rgba(29, 185, 84, 0.3);
}

.sidebar__name {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    text-align: center;
}

.sidebar__search {
    width: 100%;
    margin-bottom: var(--spacing-xl);
}

.sidebar__search input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    transition: all var(--transition-normal);
}

.sidebar__search input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 2px rgba(29, 185, 84, 0.2);
}

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

.sidebar__menu {
    list-style: none;
    margin: 0;
    padding: 0;
}

.sidebar__item {
    margin-bottom: var(--spacing-sm);
}

.sidebar__link {
    display: flex;
    align-items: center;
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
}

.sidebar__link:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(4px);
}

.sidebar__link.active {
    color: var(--color-primary);
    background: rgba(29, 185, 84, 0.15);
    border-left: 3px solid var(--color-primary);
}

.sidebar__link i {
    margin-right: var(--spacing-md);
    font-size: 1.2rem;
    width: 20px;
    text-align: center;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: var(--spacing-lg);
    min-height: calc(100vh - var(--navbar-height));
    transition: margin-left var(--transition-normal);
    background: var(--color-background);
}

/* Content Cards */
.content-card {
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    height: 100%;
}

.content-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(29, 185, 84, 0.3);
}

.content-card__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.content-card:hover .content-card__image {
    transform: scale(1.05);
}

.content-card__body {
    padding: var(--spacing-lg);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.content-card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.content-card__text {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
    line-height: 1.5;
}

.content-card__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Scrollable Lists */
.scroll-container {
    position: relative;
    margin: var(--spacing-lg) 0;
}

.scroll-list {
    display: flex;
    overflow-x: auto;
    padding: var(--spacing-md) 0;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) rgba(255, 255, 255, 0.1);
}

.scroll-list::-webkit-scrollbar {
    height: 8px;
}

.scroll-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.scroll-list::-webkit-scrollbar-thumb {
    background-color: var(--color-primary);
    border-radius: 10px;
}

.scroll-item {
    flex: 0 0 auto;
    width: 200px;
    margin-right: var(--spacing-md);
}

.scroll-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background: var(--color-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition-normal);
}

.scroll-nav:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-50%) scale(1.1);
}

.scroll-nav--prev {
    left: -20px;
}

.scroll-nav--next {
    right: -20px;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 2px rgba(29, 185, 84, 0.2);
}

.form-control::placeholder {
    color: var(--color-text-secondary);
}

/* Music Player Styles */
.music-player {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--player-height);
    background: var(--color-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 1000;
}

.player-info {
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 0;
}

.player-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
    justify-content: center;
}

.player-volume {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: flex-end;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* Responsive Design */
@media (max-width: 1200px) {
    :root {
        --sidebar-width: 220px;
    }
    
    .scroll-item {
        width: 180px;
    }
}

@media (max-width: 992px) {
    :root {
        --sidebar-width: 200px;
    }
    
    .row {
        flex-direction: column;
    }
    
    .col {
        width: 100%;
        margin-bottom: var(--spacing-lg);
    }
    
    .scroll-item {
        width: 160px;
    }
    
    .navbar__auth {
        gap: var(--spacing-sm);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 100%;
        --navbar-height: 60px;
        --spacing-base: 12px;
    }
    
    body {
        font-size: 14px;
    }
    
    .navbar {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .navbar__menu {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        width: 100%;
        background: var(--color-surface);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        flex-direction: column;
        padding: var(--spacing-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        z-index: 999;
    }
    
    .navbar__menu.is-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .navbar__item {
        margin: var(--spacing-sm) 0;
        width: 100%;
    }
    
    .navbar__link {
        display: block;
        width: 100%;
        text-align: center;
        padding: var(--spacing-md);
    }
    
    .navbar__toggle {
        display: block;
    }
    
    .sidebar {
        transform: translateX(-100%);
        z-index: 1000;
        width: 280px;
    }
    
    .sidebar.is-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: var(--spacing-md);
    }
    
    main {
        margin-left: 0;
        padding: calc(var(--navbar-height) + var(--spacing-md)) var(--spacing-md) calc(var(--player-height) + var(--spacing-md));
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .scroll-nav {
        width: 35px;
        height: 35px;
    }
    
    .content-card__body {
        padding: var(--spacing-md);
    }
    
    .music-player {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .player-controls {
        gap: var(--spacing-sm);
    }
}

@media (max-width: 576px) {
    :root {
        --spacing-base: 10px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .navbar {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .navbar__logo {
        font-size: var(--font-size-lg);
    }
    
    .sidebar {
        width: 100%;
    }
    
    .sidebar__profile {
        padding: var(--spacing-md);
    }
    
    .sidebar__avatar {
        width: 60px;
        height: 60px;
    }
    
    .main-content {
        padding: var(--spacing-sm);
    }
    
    main {
        padding: calc(var(--navbar-height) + var(--spacing-sm)) var(--spacing-sm) calc(var(--player-height) + var(--spacing-sm));
    }
    
    .content-card__body {
        padding: var(--spacing-sm);
    }
    
    .content-card__title {
        font-size: var(--font-size-base);
    }
    
    .scroll-item {
        width: 140px;
    }
    
    .scroll-nav {
        display: none;
    }
    
    .music-player {
        height: 70px;
        padding: var(--spacing-xs) var(--spacing-sm);
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .player-info,
    .player-controls,
    .player-volume {
        flex: none;
        width: 100%;
        justify-content: center;
    }
    
    .player-info {
        order: 2;
    }
    
    .player-controls {
        order: 1;
    }
    
    .player-volume {
        order: 3;
        display: none;
    }
    
    .content-card__image {
        height: 150px;
    }
}

/* Dark mode toggle */
.theme-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--color-primary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.ml-0 { margin-left: 0; }
.mr-0 { margin-right: 0; }

.p-0 { padding: 0; }
.m-0 { margin: 0; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }