:root {
            /* Light Mode Colors */
            --bg-primary: #ffffff;
            --bg-secondary: #f8fafc;
            --bg-tertiary: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-tertiary: #64748b;
            --border-color: #e2e8f0;
            --card-bg: rgba(255, 255, 255, 0.95);
            --input-bg: #ffffff;
            --input-border: #e2e8f0;
            --input-focus-border: #6366f1;
            --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);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
            --grid-opacity: 0.1;
            --orb-opacity: 0.2;
        }

        [data-bs-theme="dark"] {
            /* Dark Mode Colors */
            --bg-primary: #0f172a;
            --bg-secondary: #1e293b;
            --bg-tertiary: #334155;
            --text-primary: #f8fafc;
            --text-secondary: #cbd5e1;
            --text-tertiary: #94a3b8;
            --border-color: rgba(99, 102, 241, 0.2);
            --card-bg: rgba(15, 23, 42, 0.8);
            --input-bg: rgba(15, 23, 42, 0.6);
            --input-border: rgba(99, 102, 241, 0.2);
            --input-focus-border: #6366f1;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
            --grid-opacity: 0.3;
            --orb-opacity: 0.3;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg-primary);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow-x: hidden;
            overflow-y: auto;
            padding: 40px 0;
            transition: background 0.3s ease;
        }

        /* Animated grid background */
        .grid-background {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(rgba(99, 102, 241, var(--grid-opacity)) 1px, transparent 1px),
                linear-gradient(90deg, rgba(99, 102, 241, var(--grid-opacity)) 1px, transparent 1px);
            background-size: 50px 50px;
            animation: gridMove 20s linear infinite;
            transition: opacity 0.3s ease;
        }

        @keyframes gridMove {
            0% { transform: translate(0, 0); }
            100% { transform: translate(50px, 50px); }
        }

        /* Floating orbs */
        .orb {
            position: fixed;
            border-radius: 50%;
            filter: blur(80px);
            opacity: var(--orb-opacity);
            animation: float 20s infinite ease-in-out;
            transition: opacity 0.3s ease;
        }

        .orb-1 {
            width: 500px;
            height: 500px;
            background: #6366f1;
            top: -250px;
            left: -250px;
            animation-delay: 0s;
        }

        .orb-2 {
            width: 400px;
            height: 400px;
            background: #8b5cf6;
            bottom: -200px;
            right: -200px;
            animation-delay: 5s;
        }

        .orb-3 {
            width: 300px;
            height: 300px;
            background: #ec4899;
            top: 50%;
            right: -150px;
            animation-delay: 10s;
        }

        @keyframes float {
            0%, 100% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(100px, -100px) scale(1.1); }
            66% { transform: translate(-50px, 50px) scale(0.9); }
        }

        .auth-wrapper {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
            position: relative;
            z-index: 1;
        }

        .auth-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-xl);
            overflow: hidden;
            animation: fadeInUp 0.8s ease-out;
            transition: background 0.3s ease, border-color 0.3s ease;
        }

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

        .auth-left {
            background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
            padding: 80px 60px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            color: white;
            position: relative;
            overflow: hidden;
        }

        .auth-left::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
            opacity: 0.3;
        }

        .auth-left-content {
            position: relative;
            z-index: 1;
        }

        .auth-logo {
            margin-bottom: 40px;
        }

        .auth-logo img {
            height: 180px;
            width: auto;
            max-width: 100%;
            filter: brightness(0) invert(1);
        }

        .auth-left h1 {
            font-size: 42px;
            font-weight: 800;
            margin-bottom: 20px;
            line-height: 1.2;
            letter-spacing: -1px;
        }

        .auth-left p {
            font-size: 18px;
            opacity: 0.9;
            line-height: 1.6;
            max-width: 400px;
        }

        .auth-right {
            padding: 60px;
            background: var(--bg-secondary);
            display: flex;
            flex-direction: column;
            justify-content: center;
            transition: background 0.3s ease;
        }

        .auth-form-header {
            margin-bottom: 40px;
        }

        .auth-form-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            transition: color 0.3s ease;
        }

        .auth-form-header p {
            font-size: 16px;
            color: var(--text-tertiary);
            transition: color 0.3s ease;
        }

        .form-group {
            margin-bottom: 24px;
        }

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 10px;
            letter-spacing: 0.3px;
            transition: color 0.3s ease;
        }

        .input-wrapper {
            position: relative;
        }

        .input-icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-tertiary);
            font-size: 20px;
            z-index: 2;
            transition: color 0.3s ease;
        }

        .form-control {
            width: 100%;
            padding: 16px 20px 16px 56px;
            background: var(--input-bg);
            border: 2px solid var(--input-border);
            border-radius: 12px;
            color: var(--text-primary);
            font-size: 15px;
            transition: all 0.3s ease;
            outline: none;
        }

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

        .form-control:focus {
            border-color: var(--input-focus-border);
            background: var(--input-bg);
            box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
        }

        .form-control:focus + .input-icon {
            color: var(--input-focus-border);
        }

        .password-toggle-btn {
            position: absolute;
            right: 18px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--text-tertiary);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: all 0.2s ease;
            z-index: 2;
        }

        .password-toggle-btn:hover {
            color: var(--input-focus-border);
            background: rgba(99, 102, 241, 0.1);
        }

        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin: 24px 0;
        }

        .form-check {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .form-check-input {
            width: 18px;
            height: 18px;
            border: 2px solid var(--input-border);
            border-radius: 4px;
            background: var(--input-bg);
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .form-check-input:checked {
            background: var(--input-focus-border);
            border-color: var(--input-focus-border);
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='M6 10l3 3l6-6'/%3e%3c/svg%3e");
        }

        .form-check-label {
            color: var(--text-secondary);
            font-size: 14px;
            cursor: pointer;
            margin: 0;
            transition: color 0.3s ease;
        }

        .forgot-link {
            color: var(--input-focus-border);
            text-decoration: none;
            font-size: 14px;
            font-weight: 600;
            transition: color 0.2s ease;
        }

        .forgot-link:hover {
            color: #8b5cf6;
        }

        .btn-submit {
            width: 100%;
            padding: 16px 24px;
            background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
            border: none;
            border-radius: 12px;
            color: white;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .btn-submit::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 0.5s;
        }

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

        .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
        }

        .btn-submit:active {
            transform: translateY(0);
        }

        .alert {
            padding: 16px 20px;
            border-radius: 12px;
            margin-bottom: 24px;
            border-left: 4px solid;
            font-size: 14px;
        }

        .alert-danger {
            background: rgba(239, 68, 68, 0.1);
            border-color: #ef4444;
            color: #dc2626;
        }

        [data-bs-theme="dark"] .alert-danger {
            background: rgba(239, 68, 68, 0.2);
            color: #fca5a5;
        }

        .auth-footer {
            margin-top: 32px;
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid var(--border-color);
            transition: border-color 0.3s ease;
        }

        .auth-footer p {
            color: var(--text-tertiary);
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .auth-footer a {
            color: var(--input-focus-border);
            text-decoration: none;
            font-weight: 600;
            transition: color 0.2s ease;
        }

        .auth-footer a:hover {
            color: #8b5cf6;
        }

        /* Dark mode specific adjustments */
        [data-bs-theme="dark"] body {
            background: #0f172a;
        }

        [data-bs-theme="dark"] .auth-right {
            background: rgba(30, 41, 59, 0.5);
        }

        [data-bs-theme="dark"] .form-control {
            background: rgba(15, 23, 42, 0.6);
            border-color: rgba(99, 102, 241, 0.2);
        }

        [data-bs-theme="dark"] .form-control:focus {
            background: rgba(15, 23, 42, 0.8);
        }

        @media (max-width: 968px) {
            .auth-container {
                grid-template-columns: 1fr;
            }

            .auth-left {
                padding: 50px 40px;
                min-height: 300px;
            }

            .auth-left h1 {
                font-size: 32px;
            }

            .auth-right {
                padding: 50px 40px;
            }
        }

        @media (max-width: 576px) {
            body {
                padding: 20px 0;
            }

            .auth-wrapper {
                padding: 16px;
            }

            .auth-left {
                padding: 40px 30px;
            }

            .auth-left h1 {
                font-size: 28px;
            }

            .auth-right {
                padding: 40px 30px;
            }

            .auth-form-header h2 {
                font-size: 26px;
            }
        }