:root {
            --primary: #0d47a1;
            --primary-light: #1976d2;
            --secondary: #00838f;
            --bg-default: #f4f6f8;
            --bg-paper: #ffffff;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --border-color: #e2e8f0;
            --card-shadow: 0px 10px 30px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        [data-theme="dark"] {
            --primary: #90caf9;
            --primary-light: #e3f2fd;
            --secondary: #4dd0e1;
            --bg-default: #0a192f;
            --bg-paper: #112240;
            --text-primary: #f8fafc;
            --text-secondary: #94a3b8;
            --border-color: #233554;
            --card-shadow: 0px 10px 30px rgba(0, 0, 0, 0.3);
        }

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

        body {
            font-family: 'Prompt', sans-serif;
            background-color: var(--bg-default);
            color: var(--text-primary);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .navbar {
            background-color: var(--bg-paper);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            padding: 1rem 1.5rem;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
        }

        .logo img {
            height: 40px;
            width: auto;
        }

        .theme-toggle {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .auth-wrapper {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 2rem 1rem;
        }

        .auth-card {
            background-color: var(--bg-paper);
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
            width: 100%;
            max-width: 440px;
            padding: 2.5rem 2rem;
        }

        .auth-header {
            text-align: center;
            margin-bottom: 2rem;
        }

        .auth-header h4 {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }

        .auth-header p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .form-group {
            margin-bottom: 1.25rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.4rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .password-input-group {
            position: relative;
            display: flex;
            align-items: center;
        }

        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            font-family: inherit;
            font-size: 0.95rem;
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            color: var(--text-primary);
            outline: none;
            transition: var(--transition);
        }

        .password-input-group .form-control {
            padding-right: 2.75rem;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.15);
        }

        .toggle-password {
            position: absolute;
            right: 10px;
            background: none;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 4px;
            border-radius: 50%;
            transition: var(--transition);
        }

        .toggle-password:hover {
            color: var(--primary);
            background-color: rgba(0, 0, 0, 0.05);
        }

        /* Password Strength Meter */
        .strength-meter {
            height: 5px;
            background-color: var(--border-color);
            border-radius: 3px;
            margin-top: 8px;
            overflow: hidden;
        }

        .strength-bar {
            height: 100%;
            width: 0%;
            transition: width 0.3s ease, background-color 0.3s ease;
        }

        .strength-label {
            display: flex;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        .btn {
            width: 100%;
            padding: 0.85rem;
            font-size: 1rem;
            font-weight: 500;
            font-family: inherit;
            border-radius: 10px;
            cursor: pointer;
            border: none;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-primary {
            background-color: var(--primary-light);
            color: #ffffff;
        }

        .btn-primary:hover {
            opacity: 0.95;
        }

        .btn-primary:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

        .btn-link {
            background: none;
            border: none;
            color: var(--secondary);
            font-family: inherit;
            font-size: 0.9rem;
            cursor: pointer;
            margin-top: 0.8rem;
            width: 100%;
            text-align: center;
            text-decoration: underline;
        }

        /* Toast Container & Notification */
        .toast-container {
            position: fixed;
            top: 24px;
            right: 24px;
            z-index: 9999;
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 380px;
            width: calc(100% - 48px);
            pointer-events: none;
        }

        .toast {
            pointer-events: auto;
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 18px;
            border-radius: 12px;
            background-color: var(--bg-paper);
            color: var(--text-primary);
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
            animation: toastSlideIn 0.35s cubic-bezier(0.215, 0.61, 0.355, 1) forwards;
            transition: all 0.3s ease;
        }

        .toast.hide {
            opacity: 0;
            transform: translateX(100%);
            margin-top: -50px;
        }

        .toast-icon {
            font-size: 1.5rem;
            flex-shrink: 0;
        }

        .toast-message {
            font-size: 0.92rem;
            font-weight: 500;
            flex-grow: 1;
        }

        .toast-success {
            border-left: 4px solid #10b981;
        }

        .toast-success .toast-icon {
            color: #10b981;
        }

        .toast-error {
            border-left: 4px solid #ef4444;
        }

        .toast-error .toast-icon {
            color: #ef4444;
        }

        .toast-warning {
            border-left: 4px solid #f59e0b;
        }

        .toast-warning .toast-icon {
            color: #f59e0b;
        }

        @keyframes toastSlideIn {
            from {
                opacity: 0;
                transform: translateX(100%);
            }

            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        /* Spinner */
        .spinner {
            width: 18px;
            height: 18px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-top-color: #ffffff;
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }

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

        footer {
            text-align: center;
            padding: 1.5rem;
            color: var(--text-secondary);
            font-size: 0.85rem;
            border-top: 1px solid var(--border-color);
            background-color: var(--bg-paper);
        }

        @media (max-width: 480px) {
            .toast-container {
                top: 16px;
                right: 16px;
                left: 16px;
                width: auto;
                max-width: none;
            }
        }