/**
 * AOS - Artist Operating System
 * Main Stylesheet
 */

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --sidebar-width: 260px;
    --top-bar-height: 64px;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

/* App Container */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--surface);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border);
}

.app-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.app-subtitle {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-nav {
    padding: 16px 0;
}

.nav-list {
    list-style: none;
}

.nav-group-label {
    display: block;
    padding: 12px 24px 8px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-sublist {
    list-style: none;
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background-color: var(--background);
    color: var(--text-primary);
}

.nav-link.active {
    background-color: var(--background);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 500;
}

.nav-item-placeholder .nav-link {
    opacity: 0.6;
}

.nav-item-placeholder .nav-link:hover {
    opacity: 1;
}

.nav-icon {
    font-size: 20px;
    margin-right: 12px;
    width: 24px;
    text-align: center;
}

.nav-text {
    font-size: 14px;
}

/* Main Content Area */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* Top Bar */
.top-bar {
    height: var(--top-bar-height);
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 20px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all 0.3s ease;
}

.global-search {
    position: relative;
    width: 300px;
}

.global-search input {
    width: 100%;
    padding: 10px 40px 10px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background-color: var(--background);
    transition: border-color 0.2s ease;
}

.global-search input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 16px;
    pointer-events: none;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.artist-switcher select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background-color: var(--surface);
    cursor: pointer;
    min-width: 150px;
}

.artist-switcher select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.user-profile:hover {
    background-color: var(--background);
}

.user-avatar {
    font-size: 20px;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
}

/* Content Sections */
.content-section {
    display: none;
    padding: 32px 48px;
    animation: fadeIn 0.3s ease;
}

.content-section.active {
    display: block;
}

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

.section-header {
    margin-bottom: 32px;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

/* Dashboard Content */
.dashboard-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.dashboard-card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.dashboard-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

/* Floating Action Button */
.fab {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    transition: all 0.3s ease;
    z-index: 1000;
}

.fab:hover {
    background-color: var(--primary-dark);
    transform: scale(1.1);
}

.fab-icon {
    line-height: 1;
}

/* Placeholder sections */
.nav-item-placeholder {
    position: relative;
}

.nav-item-placeholder .nav-link::after {
    content: 'Coming Soon';
    position: absolute;
    right: 24px;
    font-size: 10px;
    background-color: var(--warning);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 240px;
    }

    .main-content {
        margin-left: var(--sidebar-width);
    }

    .content-section {
        padding: 24px 32px;
    }

    .global-search {
        width: 250px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .global-search {
        width: 200px;
    }

    .artist-switcher {
        display: none;
    }

    .content-section {
        padding: 20px 24px;
    }

    .section-header h2 {
        font-size: 24px;
    }

    .section-subtitle {
        font-size: 14px;
    }

    .dashboard-content {
        grid-template-columns: 1fr;
    }

    .fab {
        bottom: 24px;
        right: 24px;
        width: 48px;
        height: 48px;
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .top-bar {
        padding: 0 16px;
    }

    .global-search {
        width: 150px;
    }

    .global-search input {
        font-size: 12px;
    }

    .content-section {
        padding: 16px;
    }

    .section-header h2 {
        font-size: 20px;
    }

    .user-name {
        display: none;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.p-1 { padding: 8px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.p-4 { padding: 32px; }

/* Loading State */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px;
    color: var(--text-secondary);
}

.loading::after {
    content: '';
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 12px;
}

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

/* Empty State */
.empty-state {
    text-align: center;
    padding: 48px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.empty-state-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.empty-state-description {
    font-size: 14px;
}