/* ====================================
   Modern Alert System - CEV
   ==================================== */

:root {
    /* Colors - Semantic */
    --alert-warning-bg: #FEF3C7;
    --alert-warning-border: #F59E0B;
    --alert-warning-text: #92400E;
    --alert-warning-icon: #D97706;
    --alert-warning-hover: #FDE68A;

    --alert-error-bg: #FEE2E2;
    --alert-error-border: #EF4444;
    --alert-error-text: #991B1B;
    --alert-error-icon: #DC2626;

    --alert-success-bg: #D1FAE5;
    --alert-success-border: #10B981;
    --alert-success-text: #065F46;
    --alert-success-icon: #059669;

    --alert-info-bg: #DBEAFE;
    --alert-info-border: #3B82F6;
    --alert-info-text: #1E40AF;
    --alert-info-icon: #2563EB;

    /* Spacing */
    --alert-padding: 1rem;
    --alert-gap: 0.875rem;
    --alert-radius: 0.75rem;

    /* Animation */
    --alert-duration: 0.3s;
    --alert-easing: cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows */
    --alert-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
                    0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --alert-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
                          0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Toast alert (fixed, top-right) — do not apply to inline validation report alerts */
.cev-alert-toast {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    max-width: 28rem;
    width: calc(100% - 3rem);
    background: var(--alert-warning-bg);
    border-left: 4px solid var(--alert-warning-border);
    border-radius: var(--alert-radius);
    box-shadow: var(--alert-shadow);
    overflow: hidden;
    z-index: 9999;
    opacity: 0;
    transform: translateX(120%) scale(0.95);
    transition: all var(--alert-duration) var(--alert-easing);
    backdrop-filter: blur(10px);
}

.cev-alert-toast.cev-alert-show {
    opacity: 1;
    transform: translateX(0) scale(1);
}

.cev-alert-toast:hover {
    box-shadow: var(--alert-shadow-hover);
}

/* Alert Inner Container */
.cev-alert-container {
    display: flex;
    align-items: flex-start;
    gap: var(--alert-gap);
    padding: var(--alert-padding);
    position: relative;
}

/* Alert Icon */
.cev-alert-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: white;
    border-radius: 50%;
    color: var(--alert-warning-icon);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.cev-alert-icon svg {
    width: 1.25rem;
    height: 1.25rem;
}

/* Alert Content */
.cev-alert-content {
    flex: 1;
    min-width: 0;
    padding: 0.125rem 0;
}

.cev-alert-title {
    margin: 0 0 0.25rem 0;
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--alert-warning-text);
    letter-spacing: -0.01em;
}

.cev-alert-message {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--alert-warning-text);
    opacity: 0.9;
}

/* Close Button */
.cev-alert-close {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 0.375rem;
    color: var(--alert-warning-text);
    opacity: 0.6;
    cursor: pointer;
    transition: all 0.2s var(--alert-easing);
    margin: -0.25rem -0.25rem 0 0;
}

.cev-alert-close:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.05);
    transform: scale(1.05);
}

.cev-alert-close:active {
    transform: scale(0.95);
}

.cev-alert-close svg {
    width: 1rem;
    height: 1rem;
}

/* Progress Bar */
.cev-alert-progress {
    height: 3px;
    background: linear-gradient(
        90deg,
        var(--alert-warning-border) 0%,
        var(--alert-warning-icon) 100%
    );
    transform-origin: left;
    animation: alertProgress 5s linear forwards;
}

@keyframes alertProgress {
    from {
        transform: scaleX(1);
    }
    to {
        transform: scaleX(0);
    }
}

/* Alert Variants */
.cev-alert-error {
    background: var(--alert-error-bg);
    border-left-color: var(--alert-error-border);
}

.cev-alert-error .cev-alert-icon {
    color: var(--alert-error-icon);
}

.cev-alert-error .cev-alert-title,
.cev-alert-error .cev-alert-message,
.cev-alert-error .cev-alert-close {
    color: var(--alert-error-text);
}

.cev-alert-error .cev-alert-progress {
    background: linear-gradient(
        90deg,
        var(--alert-error-border) 0%,
        var(--alert-error-icon) 100%
    );
}

.cev-alert-success {
    background: var(--alert-success-bg);
    border-left-color: var(--alert-success-border);
}

.cev-alert-success .cev-alert-icon {
    color: var(--alert-success-icon);
}

.cev-alert-success .cev-alert-title,
.cev-alert-success .cev-alert-message,
.cev-alert-success .cev-alert-close {
    color: var(--alert-success-text);
}

.cev-alert-success .cev-alert-progress {
    background: linear-gradient(
        90deg,
        var(--alert-success-border) 0%,
        var(--alert-success-icon) 100%
    );
}

.cev-alert-info {
    background: var(--alert-info-bg);
    border-left-color: var(--alert-info-border);
}

.cev-alert-info .cev-alert-icon {
    color: var(--alert-info-icon);
}

.cev-alert-info .cev-alert-title,
.cev-alert-info .cev-alert-message,
.cev-alert-info .cev-alert-close {
    color: var(--alert-info-text);
}

.cev-alert-info .cev-alert-progress {
    background: linear-gradient(
        90deg,
        var(--alert-info-border) 0%,
        var(--alert-info-icon) 100%
    );
}

/* Responsive */
@media (max-width: 640px) {
    .cev-alert-toast {
        top: 1rem;
        right: 1rem;
        left: 1rem;
        width: auto;
        max-width: none;
    }

    .cev-alert-container {
        padding: 0.875rem;
    }

    .cev-alert-title {
        font-size: 0.875rem;
    }

    .cev-alert-message {
        font-size: 0.8125rem;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --alert-warning-bg: rgba(217, 119, 6, 0.15);
        --alert-warning-text: #FCD34D;

        --alert-error-bg: rgba(220, 38, 38, 0.15);
        --alert-error-text: #FCA5A5;

        --alert-success-bg: rgba(5, 150, 105, 0.15);
        --alert-success-text: #6EE7B7;

        --alert-info-bg: rgba(37, 99, 235, 0.15);
        --alert-info-text: #93C5FD;
    }

    .cev-alert-icon {
        background: rgba(255, 255, 255, 0.1);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .cev-alert-toast,
    .cev-alert-close,
    .cev-alert-progress {
        animation: none;
        transition: none;
    }
}

/* Focus Visible */
.cev-alert-close:focus-visible {
    outline: 2px solid var(--alert-warning-border);
    outline-offset: 2px;
}