:root {
    --primary-color: #9b87f5;
    --primary-dark: #7c63d4;
    --primary-light: #b8a5ff;
    --secondary-color: #6366f1;
    --background: #f8f9fa;
    --card-bg: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --online-green: #34d399;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: var(--card-bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 32px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s;
}

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

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.chat-icon {
    font-size: 24px;
    color: var(--text-secondary);
    transition: color 0.3s;
}

.chat-icon:hover {
    color: var(--primary-color);
}

.menu-btn, .user-avatar-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 24px;
    color: var(--text-secondary);
    padding: 5px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-light);
}

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

.user-menu, .guest-menu {
    position: relative;
}

.user-dropdown, .guest-dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: 50px;
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    min-width: 250px;
    z-index: 1001;
}

.user-dropdown.active, .guest-dropdown.active {
    display: block;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.user-info strong {
    display: block;
    font-size: 16px;
}

.user-info small {
    color: var(--text-secondary);
    font-size: 12px;
}

.admin-badge {
    background: var(--online-green);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    margin-left: 5px;
}

.user-dropdown a, .guest-dropdown a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    color: var(--text-primary);
    text-decoration: none;
    transition: background 0.2s;
}

.user-dropdown a:hover, .guest-dropdown a:hover {
    background: var(--background);
}

/* Search */
.search-container {
    padding: 15px 0;
}

.search-form {
    display: flex;
    gap: 10px;
}

.search-wrap {
    position: relative;
    flex: 1;
}

.search-suggest {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    z-index: 1100;
    overflow: hidden;
    max-height: 420px;
    overflow-y: auto;
}

.suggest-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    text-decoration: none;
    color: var(--text-primary);
    transition: background 0.15s;
    border-bottom: 1px solid var(--border-color);
}

.suggest-item:last-child { border-bottom: none; }
.suggest-item:hover { background: var(--background); }
.suggest-item i { color: var(--primary-color); width: 18px; text-align: center; }
.suggest-label { flex: 1; font-weight: 500; }
.suggest-sub { color: var(--text-secondary); font-size: 13px; }

.search-input {
    width: 100%;
    padding: 12px 20px;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

.search-input:focus {
    border-color: var(--primary-color);
}

.search-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 25px;
    padding: 12px 30px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

.search-btn:hover {
    background: var(--primary-dark);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 250px);
    padding: 30px 0;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--text-secondary);
    color: white;
}

.btn-secondary:hover {
    background: var(--text-primary);
}

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

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

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: var(--primary-color);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

select.form-control {
    cursor: pointer;
}

/* Flash Messages */
.flash-messages {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1002;
    max-width: 400px;
}

.alert {
    padding: 15px 20px;
    border-radius: 6px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.3s ease-out;
}

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

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success);
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--error);
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-left: 4px solid var(--secondary-color);
}

.close-btn {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: inherit;
    opacity: 0.7;
}

.close-btn:hover {
    opacity: 1;
}

/* Footer */
.footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    margin-top: 50px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--background);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s;
}

.social-icon:hover {
    background: var(--primary-color);
    color: white;
}

.footer-bottom {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .search-container {
        width: 100%;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}