/* ============================================
   INFINITY OS - ALERTS & STATES
   Shared notices, informational panels, and state surfaces
   ============================================ */

.infinity-alert,
.ui-notice {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(17, 23, 36, 0.9) 0%, rgba(12, 17, 28, 0.84) 100%);
    box-shadow: 0 20px 50px rgba(2, 6, 23, 0.24);
    position: relative;
    overflow: hidden;
}

.infinity-alert::before,
.ui-notice::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(130deg, rgba(255, 255, 255, 0.05), transparent 36%, rgba(0, 240, 255, 0.08) 100%);
    pointer-events: none;
}

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

.alert-copy,
.ui-notice__content {
    position: relative;
    z-index: 1;
    flex: 1;
}

.alert-title,
.ui-notice__icon {
    color: var(--text-primary);
}

.ui-notice__icon,
.ui-state__icon {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
}

.ui-notice__title {
    margin: 0 0 var(--space-xs);
    font-size: 1rem;
    color: var(--text-primary);
}

.alert-title {
    margin-bottom: var(--space-xs);
}

.alert-info,
.ui-notice--info {
    background: var(--color-info-bg);
    border-color: rgba(0, 240, 255, 0.2);
}

.alert-success {
    background: var(--color-success-bg);
    border-color: rgba(0, 255, 136, 0.2);
}

.alert-warning,
.ui-notice--warning {
    background: var(--color-warning-bg);
    border-color: rgba(255, 193, 7, 0.2);
}

.alert-error {
    background: var(--color-error-bg);
    border-color: rgba(255, 107, 129, 0.2);
}

.alert-neutral,
.ui-notice--neutral {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--border-color);
}

.ui-notice__text {
    margin: 0;
    color: var(--text-primary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.ui-note-list {
    margin: var(--space-xs) 0 0 calc(var(--space-md) + 4px);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.6;
}

.ui-state {
    position: relative;
    overflow: hidden;
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
    border: 1px dashed rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(15, 21, 33, 0.8) 0%, rgba(10, 14, 24, 0.72) 100%);
}

.ui-state--compact {
    padding: var(--space-lg);
}

.ui-state--loading,
.ui-state--error,
.ui-state--empty {
    min-height: 100%;
}

.ui-state__icon {
    margin: 0 auto var(--space-md);
    font-size: 1.25rem;
    opacity: 1;
}

.ui-state__title {
    margin: 0 0 var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.ui-state__description {
    margin: 0 auto;
    max-width: 28rem;
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.ui-state__actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.ui-state__caption {
    margin-top: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.ui-loading-skeleton {
    width: 100%;
    min-height: 220px;
    border-radius: var(--radius-md);
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.05) 25%, rgba(255, 255, 255, 0.12) 50%, rgba(255, 255, 255, 0.05) 75%);
    background-size: 200% 100%;
    animation: uiShimmer 1.8s linear infinite;
}

.ui-state--loading .ui-state__icon::before {
    content: '';
    width: 1rem;
    height: 1rem;
    border-radius: 999px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    animation: uiSpin 0.7s linear infinite;
}

.ui-inline-feedback {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.ui-inline-feedback--muted {
    color: var(--text-tertiary);
}

.ui-inline-feedback--error {
    color: var(--color-error);
}

@keyframes uiShimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

@keyframes uiSpin {
    to {
        transform: rotate(360deg);
    }
}
/* ============================================
   PHASE 4 — CANONICAL EMPTY STATE
   Standardized empty / zero-data surface
   ============================================ */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    min-height: 200px;
}

.empty-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    margin: 0 auto var(--space-lg);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-tertiary);
    font-size: 1.5rem;
}

.empty-icon svg {
    width: 2rem;
    height: 2rem;
    stroke: var(--text-tertiary);
}

.empty-title {
    margin: 0 0 var(--space-sm);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
}

.empty-message {
    margin: 0 0 var(--space-lg);
    max-width: 26rem;
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.empty-hint {
    margin: 0;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.empty-action {
    margin-top: var(--space-md);
}

/* Compact empty state — for table cells, mini panels */
.empty-state--compact {
    min-height: 120px;
    padding: var(--space-lg);
}

.empty-state--compact .empty-icon {
    width: 2.5rem;
    height: 2.5rem;
    margin-bottom: var(--space-md);
}

/* ============================================
   PHASE 4 — INLINE FEEDBACK STATES
   Validation hints, field-level feedback
   ============================================ */

.field-error {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    margin-top: var(--space-xs);
    font-size: 0.8125rem;
    color: var(--color-error);
}

.field-success {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    margin-top: var(--space-xs);
    font-size: 0.8125rem;
    color: var(--color-success);
}

/* ============================================
   PHASE 4 — FLASH MESSAGE DISPLAY
   Session flash feedback (success, error, warning)
   ============================================ */

.flash-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.flash {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid transparent;
}

.flash.error,
.flash-error {
    background: var(--color-error-bg);
    border-color: rgba(255, 107, 129, 0.3);
    color: var(--color-error);
}

.flash.success,
.flash-success {
    background: var(--color-success-bg);
    border-color: rgba(0, 255, 136, 0.3);
    color: var(--color-success);
}

.flash.warning,
.flash-warning {
    background: var(--color-warning-bg);
    border-color: rgba(255, 193, 7, 0.3);
    color: var(--color-warning);
}

.flash.info,
.flash-info {
    background: var(--color-info-bg);
    border-color: rgba(0, 240, 255, 0.3);
    color: var(--color-info);
}