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

    body {
        font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
        color: #e2e8f0;
    }

    .login-container {
        width: 100%;
        max-width: 420px;
        padding: 20px;
    }

    .login-logo {
        text-align: center;
        margin-bottom: 32px;
    }

    .login-logo h1 {
        font-size: 28px;
        font-weight: 700;
        color: #ffffff;
        letter-spacing: -0.5px;
    }

    .login-logo h1 span {
        color: #2563eb;
    }

    .login-logo p {
        font-size: 14px;
        color: #94a3b8;
        margin-top: 8px;
    }

    .login-card {
        background: rgba(30, 41, 59, 0.8);
        border: 1px solid rgba(71, 85, 105, 0.4);
        border-radius: 16px;
        padding: 36px;
        backdrop-filter: blur(20px);
        box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    }

    .login-card h2 {
        font-size: 20px;
        font-weight: 600;
        color: #f1f5f9;
        margin-bottom: 24px;
    }

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

    .form-group label {
        display: block;
        font-size: 13px;
        font-weight: 500;
        color: #94a3b8;
        margin-bottom: 6px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        width: 100%;
        padding: 12px 16px;
        font-size: 15px;
        font-family: 'Inter', sans-serif;
        background: rgba(15, 23, 42, 0.6);
        border: 1px solid rgba(71, 85, 105, 0.5);
        border-radius: 10px;
        color: #f1f5f9;
        outline: none;
        transition: border-color 0.2s, box-shadow 0.2s;
    }

    .form-group textarea {
        resize: vertical;
        min-height: 80px;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
        border-color: #2563eb;
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
    }

    .form-group input::placeholder,
    .form-group textarea::placeholder {
        color: #475569;
    }

    .form-group select option {
        background: #1e293b;
        color: #f1f5f9;
    }

    .login-btn {
        width: 100%;
        padding: 13px;
        font-size: 15px;
        font-weight: 600;
        font-family: 'Inter', sans-serif;
        border: none;
        border-radius: 10px;
        cursor: pointer;
        transition: all 0.2s;
        margin-bottom: 12px;
    }

    .login-btn-primary {
        background: #2563eb;
        color: white;
    }

    .login-btn-primary:hover {
        background: #1d4ed8;
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
    }

    .login-btn-primary:disabled {
        background: #1e3a5f;
        color: #64748b;
        cursor: not-allowed;
        transform: none;
        box-shadow: none;
    }

    .login-divider {
        display: flex;
        align-items: center;
        margin: 20px 0;
        gap: 12px;
    }

    .login-divider::before,
    .login-divider::after {
        content: '';
        flex: 1;
        height: 1px;
        background: rgba(71, 85, 105, 0.4);
    }

    .login-divider span {
        font-size: 12px;
        color: #64748b;
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    .login-btn-demo {
        background: transparent;
        color: #8b5cf6;
        border: 1px solid rgba(139, 92, 246, 0.4);
    }

    .login-btn-demo:hover {
        background: rgba(139, 92, 246, 0.1);
        border-color: #8b5cf6;
    }

    .login-btn-demo:disabled {
        opacity: 0.5;
        cursor: not-allowed;
    }

    .error-message {
        display: none;
        background: rgba(239, 68, 68, 0.15);
        border: 1px solid rgba(239, 68, 68, 0.3);
        color: #fca5a5;
        padding: 12px 16px;
        border-radius: 10px;
        font-size: 13px;
        margin-bottom: 16px;
    }

    .error-message.visible {
        display: block;
    }

    .success-message {
        display: none;
        background: rgba(16, 185, 129, 0.15);
        border: 1px solid rgba(16, 185, 129, 0.3);
        color: #6ee7b7;
        padding: 16px;
        border-radius: 10px;
        font-size: 14px;
        margin-bottom: 16px;
        text-align: center;
        line-height: 1.5;
    }

    .success-message.visible {
        display: block;
    }

    .login-footer {
        text-align: center;
        margin-top: 24px;
        font-size: 12px;
        color: #475569;
    }

    .loading-spinner {
        display: inline-block;
        width: 18px;
        height: 18px;
        border: 2px solid rgba(255, 255, 255, 0.3);
        border-top-color: white;
        border-radius: 50%;
        animation: spin 0.6s linear infinite;
        vertical-align: middle;
        margin-right: 8px;
    }

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

    /* Modal Overlay */
    .modal-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(4px);
        z-index: 1000;
        align-items: center;
        justify-content: center;
        padding: 20px;
    }

    .modal-overlay.visible {
        display: flex;
    }

    .modal-card {
        background: #1e293b;
        border: 1px solid rgba(71, 85, 105, 0.5);
        border-radius: 16px;
        padding: 32px;
        width: 100%;
        max-width: 460px;
        box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
        max-height: 90vh;
        overflow-y: auto;
    }

    .modal-card h2 {
        font-size: 20px;
        font-weight: 600;
        color: #f1f5f9;
        margin-bottom: 6px;
    }

    .modal-card .modal-subtitle {
        font-size: 13px;
        color: #94a3b8;
        margin-bottom: 24px;
    }

    .modal-actions {
        display: flex;
        gap: 12px;
        margin-top: 8px;
    }

    .modal-actions .login-btn {
        margin-bottom: 0;
    }

    .btn-cancel {
        background: transparent;
        color: #94a3b8;
        border: 1px solid rgba(71, 85, 105, 0.5);
    }

    .btn-cancel:hover {
        background: rgba(71, 85, 105, 0.2);
        color: #e2e8f0;
    }

    .required-star {
        color: #ef4444;
    }