/* =============================================================================
 * AUTHENTICATION UI IMPROVEMENTS
 * Toast notifications, form validation, loading states
 * ============================================================================= */

/* Toast Notification Container */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    background: white;
    border-radius: 8px;
    padding: 16px 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    max-width: 350px;
    display: flex;
    align-items: center;
    gap: 12px;
    pointer-events: all;
    animation: toastSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    border-left: 4px solid;
}

@keyframes toastSlideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

.toast.toast-error {
    border-left-color: #ef4444;
}

.toast.toast-info {
    border-left-color: #3b82f6;
}

.toast-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.toast-success .toast-icon::before {
    content: "✓";
    display: inline-block;
    width: 24px;
    height: 24px;
    background: #10b981;
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 24px;
}

.toast-error .toast-icon::before {
    content: "✕";
    display: inline-block;
    width: 24px;
    height: 24px;
    background: #ef4444;
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 24px;
}

.toast-info .toast-icon::before {
    content: "i";
    display: inline-block;
    width: 24px;
    height: 24px;
    background: #3b82f6;
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 24px;
    font-weight: bold;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: 2px;
    color: #1f2937;
}

.toast-message {
    font-size: 14px;
    color: #6b7280;
}

.toast-close {
    background: none;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    padding: 0;
    font-size: 18px;
    line-height: 1;
    transition: color 0.2s;
}

.toast-close:hover {
    color: #4b5563;
}

/* Form Error Message */
.form-error {
    background: #fee2e2;
    border: 1px solid #fecaca;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 16px;
    color: #dc2626;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-error[hidden] {
    display: none;
}

.form-error::before {
    content: "⚠";
    font-size: 16px;
}

/* Input Hints */
.input-hint {
    font-size: 12px;
    margin-top: 4px;
    margin-bottom: 12px;
    color: #6b7280;
}

.input-hint[hidden] {
    display: none;
}

.input-hint.error {
    color: #dc2626;
}

.input-hint.success {
    color: #10b981;
}

/* Input States */
.input.invalid {
    border-color: #ef4444;
    background: #fef2f2;
}

.input.valid {
    border-color: #10b981;
}

/* Button Loading State */
.modal-btn.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.modal-btn.loading::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid white;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.6s linear infinite;
}

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

/* Modal Improvements */
.modal-body {
    padding: 24px;
}

.modal label {
    display: block;
    font-weight: 500;
    margin-bottom: 6px;
    color: #374151;
    font-size: 14px;
}

.modal .input {
    margin-bottom: 4px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.modal-btn {
    flex: 1;
    transition: all 0.2s;
}

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

/* Password Strength Indicator */
.password-strength {
    height: 4px;
    background: #e5e7eb;
    border-radius: 2px;
    margin-top: 4px;
    margin-bottom: 8px;
    overflow: hidden;
}

.password-strength-bar {
    height: 100%;
    transition: width 0.3s, background-color 0.3s;
    border-radius: 2px;
}

.password-strength-bar.weak {
    width: 33%;
    background-color: #ef4444;
}

.password-strength-bar.medium {
    width: 66%;
    background-color: #f59e0b;
}

.password-strength-bar.strong {
    width: 100%;
    background-color: #10b981;
}