:root {
    --primary: #0078D4;
    --primary-hover: #005A9E;
    --secondary: #C239B3;
    --accent: #8B5CF6;
    --dark: #FFFFFF;
    --darker: #FFFFFF;
    --card: #FFFFFF;
    --card-hover: #F5F5F5;
    --surface: #FFFFFF;
    --text: #000000;
    --text-muted: #666666;
    --border: rgba(0, 0, 0, 0.1);
    --gradient-1: linear-gradient(135deg, #0078D4 0%, #005A9E 100%);
    --gradient-2: linear-gradient(135deg, #C239B3 0%, #C239B3 100%);
    --gradient-3: linear-gradient(135deg, #0078D4 0%, #0078D4 100%);
    --shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: #FFFFFF;
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .logo {
    font-family: 'Space Grotesk', sans-serif;
}

        /* Animated Background */
        .bg-mesh {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }

        .bg-mesh::before {
        /* Animated Background */
        .bg-mesh {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            overflow: hidden;
        }

        .bg-mesh::before {
            content: '';
            position: absolute;
            width: 150%;
            height: 150%;
            background: 
                radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
            animation: float 20s ease-in-out infinite;
        }

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

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

        ::-webkit-scrollbar-track {
            background: var(--darker);
        }

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

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

        /* Bootstrap Customizations */
        .btn-sm { padding: 0.4rem 0.8rem; }
        .btn-lg { padding: 0.75rem 1.5rem; }

        .custom-btn {
            padding: 12px 24px;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            transition: all 0.3s ease;
        }

        .custom-btn:hover {
            transform: translateY(-2px);
        }

        .text-gradient {
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
            color: white;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* Right Sidebar */
        .right-sidebar {
            position: sticky;
            top: 90px;
            height: fit-content;
        }

        .suggested-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 24px;
            margin-bottom: 20px;
        }

        .suggested-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .suggested-header h3 {
            font-size: 18px;
            font-weight: 600;
        }

        .suggested-user {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px;
            border-radius: 12px;
            transition: all 0.3s ease;
            margin-bottom: 8px;
        }

        .suggested-user:hover {
            background: var(--surface);
        }

        .suggested-user img {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid var(--border);
        }

        .suggested-info {
            flex: 1;
        }

        .suggested-info h4 {
            font-size: 14px;
            font-weight: 600;
        }

        .suggested-info p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Modal Styles */
        .login-modal {
            position: fixed;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 24px;
            background: rgba(2, 6, 23, 0.72);
            backdrop-filter: blur(12px);
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: opacity 0.25s ease, visibility 0.25s ease;
            z-index: 1200;
        }

        .login-modal.open {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }

        .login-modal-dialog {
            width: min(100%, 400px);
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 24px;
            box-shadow: var(--shadow);
            padding: 32px;
            position: relative;
        }

        .login-modal-header {
            text-align: center;
            margin-bottom: 24px;
        }

        .login-modal-header h3 {
            font-size: 24px;
            margin-bottom: 8px;
        }

        .login-modal-header p {
            color: var(--text-muted);
            font-size: 14px;
        }

        .login-modal-close {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 36px;
            height: 36px;
            border: 1px solid var(--border);
            border-radius: 10px;
            background: var(--surface);
            color: var(--text);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .login-modal-close:hover {
            background: var(--card-hover);
            transform: translateY(-1px);
        }

        .login-form-group {
            margin-bottom: 16px;
        }
        
        .login-form-group input {
            width: 100%;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 14px 16px;
            color: var(--text);
            font-size: 14px;
            font-family: inherit;
            transition: all 0.3s ease;
        }

        .login-form-group input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.14);
        }

        .login-form-group input.input-error {
            border-color: #ef4444;
            background: linear-gradient(to right, rgba(239, 68, 68, 0.03), var(--surface));
        }

        .login-form-group input.input-error:focus {
            border-color: #dc2626;
            box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.14);
        }

        .login-form-group .input-error-message {
            display: none;
            color: #dc2626;
            font-size: 12px;
            font-weight: 500;
            margin-top: 6px;
            margin-left: 0;
            animation: slideDown 0.3s ease-out;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .login-btn {
            width: 100%;
            padding: 14px;
            background: var(--gradient-1);
            color: white;
            border: none;
            border-radius: 14px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 8px;
        }

        .login-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
        }

        .login-footer {
            margin-top: 20px;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        .login-footer a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }
        
        .error-message {
            background: rgba(239, 68, 68, 0.1);
            border: 1px solid rgba(239, 68, 68, 0.2);
            color: #ef4444;
            padding: 12px;
            border-radius: 10px;
            margin-bottom: 16px;
            font-size: 14px;
            text-align: center;
        }

        /* ===== Responsive Design ===== */
        @media (max-width: 1200px) {
            .container {
                grid-template-columns: 1fr;
                max-width: 700px;
            }
            .left-sidebar,
            .right-sidebar {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .top-nav {
                padding: 0 12px;
                height: 60px;
            }
            .search-wrapper {
                width: 180px;
            }
            .search-bar {
                padding: 8px 14px 8px 38px;
                font-size: 13px;
            }
            .container {
                margin-top: 74px;
                padding: 0 12px;
            }
            .hero-content h1 {
                font-size: 24px;
            }
            .hero-banner {
                padding: 24px;
            }
            .card-header {
                padding: 14px 16px;
            }
            .card-content {
                padding: 0 16px 14px;
            }
            .card-actions {
                padding: 6px 16px 14px;
            }
            .card-title {
                font-size: 17px;
            }
            .feed-card {
                border-radius: 16px;
            }
        }

        @media (max-width: 480px) {
            .logo {
                font-size: 22px;
            }
            .search-wrapper {
                display: none;
            }
            .nav-right {
                gap: 8px;
            }
            .icon-btn {
                width: 36px;
                height: 36px;
            }
            .hero-content h1 {
                font-size: 20px;
            }
            .hero-content p {
                font-size: 14px;
            }
        }

/* Responsive Typography and Container */
@media (max-width: 1024px) {
  .container { max-width: 90%; padding: 0 15px; }
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
}
@media (max-width: 768px) {
  body { font-size: 0.95rem; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .container { width: 100%; padding: 0 10px; }
  .btn { display: inline-block; width: 100%; text-align: center; margin-bottom: 0.5rem; }
  form .form-group { display: flex; flex-direction: column; }
}
@media (max-width: 480px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.25rem; }
  .form-control { width: 100%; }
}