/* Alert Component System */

/* Base Alert */
.alert {
    --alert-padding-y: var(--spacing-3);
    --alert-padding-x: var(--spacing-4);
    --alert-margin-bottom: var(--spacing-5);
    --alert-border-radius: var(--radius-base);
    --alert-border-width: var(--border-width-1);

    position: relative;
    padding: var(--alert-padding-y) var(--alert-padding-x);
    margin-bottom: var(--alert-margin-bottom);
    border: var(--alert-border-width) solid transparent;
    border-radius: var(--alert-border-radius);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
}

.alert:last-child {
    margin-bottom: 0;
}

/* Alert Variants */
.alert-success {
    color: var(--alert-success-text);
    background-color: var(--alert-success-bg);
    border-color: var(--alert-success-border);
}

.alert-danger,
.alert-error {
    color: var(--alert-danger-text);
    background-color: var(--alert-danger-bg);
    border-color: var(--alert-danger-border);
}

.alert-warning {
    color: var(--alert-warning-text);
    background-color: var(--alert-warning-bg);
    border-color: var(--alert-warning-border);
}

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

/* Gas Fee Note — needs top margin because it's placed after siblings that lack bottom margin */
.gas-fee-note {
    margin-top: var(--spacing-4);
}

/* Alert with Icons */
.alert-with-icon {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
}

.alert-icon {
    flex-shrink: 0;
    width: 1.25rem;
    height: 1.25rem;
    margin-top: 0.125rem;
}

.alert-content {
    flex: 1;
    min-width: 0;
}

/* Dismissible Alerts */
.alert-dismissible {
    padding-right: calc(var(--alert-padding-x) + 2.5rem);
}

.alert-dismiss {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 2;
    padding: var(--alert-padding-y) var(--alert-padding-x);
    color: inherit;
    background: none;
    border: 0;
    opacity: 0.5;
    cursor: pointer;
}

.alert-dismiss:hover,
.alert-dismiss:focus {
    opacity: 0.75;
    text-decoration: none;
}

.alert-dismiss::before {
    content: "×";
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
}

/* Alert Sizes */
.alert-sm {
    --alert-padding-y: var(--spacing-2);
    --alert-padding-x: var(--spacing-3);
    font-size: var(--font-size-sm);
}

.alert-lg {
    --alert-padding-y: var(--spacing-4);
    --alert-padding-x: var(--spacing-5);
    font-size: var(--font-size-lg);
}

/* Alert Links */
.alert-link {
    font-weight: var(--font-weight-bold);
    color: inherit;
    text-decoration: underline;
}

.alert-link:hover,
.alert-link:focus {
    color: inherit;
    text-decoration: none;
}

/* Alert List */
.alert ul {
    margin: 0;
    padding-left: var(--spacing-5);
}

.alert ul:last-child {
    margin-bottom: 0;
}

/* Alert Headings */
.alert-heading {
    color: inherit;
    margin-bottom: var(--spacing-2);
    font-weight: var(--font-weight-bold);
}

/* Toast Notifications */
.toast {
    position: fixed;
    top: var(--spacing-4);
    right: var(--spacing-4);
    z-index: var(--z-50);
    max-width: 350px;
    background-color: var(--color-white);
    border: var(--border-width-1) solid var(--border-color);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease-in-out;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-2) var(--spacing-3);
    background-color: var(--color-gray-100);
    border-bottom: var(--border-width-1) solid var(--border-color);
    border-top-left-radius: calc(var(--radius-base) - var(--border-width-1));
    border-top-right-radius: calc(var(--radius-base) - var(--border-width-1));
}

.toast-body {
    padding: var(--spacing-3);
}

/* Alert Animation */
@keyframes alert-fade-in {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-fade-in {
    animation: alert-fade-in 0.3s ease-out;
}

/* Alert Auto-Dismiss */
.alert-fade-out {
    opacity: 0;
    transition: opacity 1s ease-out;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .toast {
        left: var(--spacing-4);
        right: var(--spacing-4);
        max-width: none;
    }

    .alert-dismissible {
        padding-right: var(--alert-padding-x);
    }

    .alert-dismiss {
        position: static;
        float: right;
        margin-left: var(--spacing-2);
    }
}

/* Fixed Notification System */
.notifications-container {
    position: fixed;
    top: calc(var(--navbar-height) + var(--spacing-4)); /* navbar height + spacing */
    left: 50%;
    transform: translateX(-50%);
    z-index: 110; /* Above navbar (101) and sidebars (100) */

    /* Container dimensions - viewport centered, never exceed viewport */
    width: min(var(--notification-max-width), calc(100vw - 2 * var(--spacing-6)));

    /* Layout */
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);

    /* Pointer events - pass through to page content */
    pointer-events: none;
}

.notifications-container .alert {
    /* Re-enable pointer events on actual alerts */
    pointer-events: auto;

    /* Override default margin (we use gap on container) */
    margin-bottom: 0;

    /* Slide-in animation */
    animation: notification-slide-in 0.3s ease-out;

    /* Shadow for elevation */
    box-shadow: var(--shadow-md);
}

/* Close button for notification container */
.notifications-close {
    position: absolute;
    top: var(--spacing-2);
    right: var(--spacing-2);
    z-index: 2;

    /* Button styling */
    background: none;
    color: var(--color-gray-600);
    border: none;
    padding: var(--spacing-1);

    /* Flexbox centering for perfect alignment at all zoom levels */
    display: flex;
    align-items: center;
    justify-content: center;

    /* Typography */
    font-size: 1.4375rem; /* 23px */
    line-height: 1;
    font-weight: 700;

    /* Interaction */
    cursor: pointer;
    transition: color 0.2s ease;

    /* Pointer events */
    pointer-events: auto;
}

.notifications-close:hover,
.notifications-close:focus {
    color: var(--color-gray-900);
}

.notifications-close:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Slide-in animation for new notifications */
@keyframes notification-slide-in {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hide animation - triggered by JS or manual close */
.notification-hiding {
    opacity: 0;
    transition: opacity 0.4s ease-out;
}

/* Responsive adjustments for notifications */
@media (max-width: 768px) {
    .notifications-container {
        top: calc(var(--navbar-height) + var(--spacing-3));
        width: calc(100% - var(--spacing-6));
        max-width: none;
    }

    .notifications-close {
        font-size: 1.625rem; /* 26px */
    }
}

/* Notification close form wrapper */
.notification-close-form {
    display: contents;
}

/* Links inside notification alerts */
.alert a.notification-link {
    color: inherit;
    text-decoration: underline;
    font-weight: var(--font-weight-semibold);
}

.alert a.notification-link:hover,
.alert a.notification-link:focus {
    text-decoration: none;
}

/* Pending Transaction Banner — reusable for any page awaiting blockchain confirmation */
.pending-banner {
    padding: var(--spacing-3) var(--spacing-4);
    margin-top: 2rem;
    margin-bottom: var(--spacing-5);
    background-color: var(--alert-info-bg);
    border: var(--border-width-1) solid var(--alert-info-border);
    border-radius: var(--radius-base);
    color: var(--alert-info-text);
}

.pending-banner p {
    margin: 0;
    font-size: var(--font-size-base);
}

/* Pending Indicator Dot — pulsing animation for transaction confirmation banners */
.pending-indicator {
    display: inline-block;
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background-color: var(--alert-info-text);
    margin-right: var(--spacing-2);
    vertical-align: middle;
    animation: pending-pulse 1.5s ease-in-out infinite;
}

@keyframes pending-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}