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

:root {
    /* Premium White & Blue Theme */
    --primary-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    --success-gradient: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    --danger-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --info-gradient: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    --warning-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);

    /* Solid Colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;

    /* Background Colors - Light Theme */
    --bg-color: #f8fafc;
    --sidebar-bg: linear-gradient(180deg, #1e3a8a 0%, #1d4ed8 100%);
    --sidebar-hover: rgba(255, 255, 255, 0.1);
    --header-bg: #ffffff;
    --card-bg: #ffffff;

    /* Text Colors - Light Theme */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;

    /* Border & Shadow - Light Theme */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Sidebar Styles */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: transform 0.3s ease;
    z-index: 1000;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    padding: 28px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-title {
    font-size: 22px;
    font-weight: 700;
    color: white;
    letter-spacing: -0.3px;
}

.sidebar-subtitle {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 4px;
    font-weight: 500;
}

.sidebar-nav {
    padding: 20px 12px;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: all 0.2s ease;
    border-radius: var(--radius-md);
    margin-bottom: 4px;
    font-weight: 500;
    font-size: 14px;
}

.nav-item:hover {
    background: var(--sidebar-hover);
    color: white;
}

.nav-item.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.nav-item i,
.nav-item svg {
    margin-right: 12px;
    opacity: 0.9;
    flex-shrink: 0;
}

.nav-item.active i,
.nav-item.active svg {
    opacity: 1;
}

.nav-section {
    margin-top: 28px;
}

.nav-section-title {
    padding: 8px 16px;
    font-size: 11px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sidebar-footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
    text-align: center;
    font-weight: 500;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    transition: margin-left 0.3s ease;
    background: var(--bg-color);
}

/* Header Styles */
.header {
    background: var(--header-bg);
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.sidebar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s;
}

.sidebar-toggle:hover {
    background-color: var(--bg-color);
}

.sidebar-toggle span {
    width: 22px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all 0.3s;
    border-radius: 2px;
}

.page-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.user-email {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.user-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.user-badge.admin {
    background: var(--warning-gradient);
    color: white;
}

.user-badge.user {
    background: var(--primary-gradient);
    color: white;
}

.user-menu {
    position: relative;
}

.user-menu-btn {
    background: var(--primary-gradient);
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-md);
    transition: all 0.2s;
    color: white;
}

.user-menu-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    display: none;
    overflow: hidden;
}

.dropdown-menu.show {
    display: block;
    animation: slideDown 0.2s ease;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s;
    font-weight: 500;
    font-size: 14px;
}

.dropdown-item:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

/* Content Wrapper */
.content-wrapper {
    padding: 32px;
    min-height: calc(100vh - 70px);
}

/* Flash Messages */
.flash-messages {
    margin-bottom: 24px;
}

.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.3s ease;
    border: 1px solid;
    font-weight: 500;
    font-size: 14px;
}

.alert-success {
    background: #f0fdf4;
    color: #166534;
    border-color: #bbf7d0;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border-color: #fecaca;
}

.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border-color: #fde68a;
}

.alert-info {
    background: #eff6ff;
    color: #1e40af;
    border-color: #bfdbfe;
}

.close-alert {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    opacity: 0.5;
    transition: all 0.2s;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-alert:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.05);
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-danger,
.btn-success {
    padding: 10px 20px;
    border-radius: var(--radius-md);
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-success {
    background: var(--success-gradient);
    color: white;
}

.btn-success:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
}

.btn-secondary {
    background-color: #e2e8f0;
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: #cbd5e1;
}

.btn-danger {
    background: var(--danger-gradient);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

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

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

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

    .sidebar-toggle {
        display: flex;
    }

    .header {
        padding: 14px 16px;
    }

    .content-wrapper {
        padding: 16px;
    }

    .user-email {
        display: none;
    }

    .page-title {
        font-size: 18px;
    }
}

/* Animations */
@keyframes slideIn {
    from {
        transform: translateY(-10px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        transform: translateY(-5px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

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

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Selection */
::selection {
    background: var(--primary-color);
    color: white;
}

::-moz-selection {
    background: var(--primary-color);
    color: white;
}