/* Modal Base */
.modal {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal[hidden] {
    display: none;
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* Prevent body scroll when modal is open */
body.modal-open {
    overflow: hidden;
    padding-right: var(--scrollbar-width, 0px);
}

/* Modal Container */
.modal-container {
    position: relative;
    width: 100%;
    max-width: 400px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
}

/* Modal Content */
.modal-content {
    padding: var(--spacing-xl);
}

/* Close Button */
.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 32px;
    height: 32px;
    padding: 0;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-close .icon {
    width: 20px;
    height: 20px;
}

/* Auth Section */
.auth-section {
    text-align: center;
}

.auth-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.auth-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* Auth Form */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.form-group input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-group input:hover {
    border-color: var(--border-hover);
}

.form-group input:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 2px rgba(var(--primary-color-rgb), 0.2);
    outline: none;
}

/* Form Error */
.form-error {
    color: var(--error-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
    min-height: 20px;
    text-align: left;
}

/* Button Loading State */
.button-loader {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.btn.loading .button-text {
    visibility: hidden;
}

.btn.loading .button-loader {
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Responsive Adjustments */
@media (max-width: 480px) {
    .modal {
        padding: var(--spacing-sm);
    }

    .modal-container {
        max-width: none;
    }
}

/* High Contrast Mode */
@media (forced-colors: active) {
    .modal-container {
        border: 2px solid ButtonText;
    }

    .form-group input {
        border: 1px solid ButtonText;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .button-loader {
        animation: none;
    }
}