/* ═══════════════════════════════════════════════════════════════
   NEXUS Dashboard - Component Styles
   Widget, Chart, and Interactive Component Styles
   ═══════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────
   Base Widget Styles
   ───────────────────────────────────────────────────────────────── */
.widget {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
    transition: all var(--transition-base);
}

.widget::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.1) 0%,
        transparent 50%,
        transparent 100%
    );
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.widget:hover::before {
    opacity: 1;
}

.widget:hover {
    transform: translateY(-4px);
    box-shadow:
        var(--glass-shadow),
        0 20px 60px rgba(0, 0, 0, 0.3),
        0 0 0 1px var(--color-border-strong);
}

/* Widget Size Variants */
.widget-lg {
    grid-column: span 8;
    min-height: 350px;
}

.widget-md {
    grid-column: span 4;
    min-height: 300px;
}

.widget-sm {
    grid-column: span 4;
    min-height: 250px;
}

/* Widget Header */
.widget-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-border);
}

.widget-title {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.widget-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.widget-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.widget-btn:hover {
    color: var(--color-text-primary);
    background: var(--color-surface);
}

.drag-handle {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    cursor: grab;
    transition: color var(--transition-fast);
    user-select: none;
}

.drag-handle:hover {
    color: var(--color-accent-primary);
}

.drag-handle:active {
    cursor: grabbing;
}

/* Widget Body */
.widget-body {
    flex: 1;
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
}

.widget-body.chart-centered {
    align-items: center;
    justify-content: center;
    position: relative;
}

/* Widget Drag States */
.widget.dragging {
    opacity: 0.6;
    transform: scale(1.02) rotate(2deg);
    box-shadow:
        0 30px 80px rgba(0, 0, 0, 0.4),
        0 0 0 2px var(--color-accent-primary);
    z-index: 100;
}

.widget.drag-over {
    transform: scale(0.98);
    border-color: var(--color-accent-primary);
    box-shadow:
        0 0 0 2px var(--color-accent-primary),
        inset 0 0 30px var(--color-accent-glow);
}

/* ─────────────────────────────────────────────────────────────────
   Chart Containers
   ───────────────────────────────────────────────────────────────── */
.widget-body canvas {
    width: 100% !important;
    height: 100% !important;
    max-height: 280px;
}

.chart-centered canvas {
    max-width: 180px;
    max-height: 180px;
}

/* Gauge Value Overlay */
.gauge-value {
    position: absolute;
    bottom: 30%;
    font-family: var(--font-mono);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-accent-primary);
    text-shadow: 0 0 20px var(--color-accent-glow);
}

/* Pie Chart Container */
.pie-container {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    width: 100%;
    height: 100%;
}

.pie-container canvas {
    flex: 1;
    max-width: 180px !important;
    max-height: 180px !important;
}

.pie-legend {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.pie-legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
}

.pie-legend-color {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.pie-legend-label {
    color: var(--color-text-secondary);
}

.pie-legend-value {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-left: auto;
}

/* ─────────────────────────────────────────────────────────────────
   Activity Feed
   ───────────────────────────────────────────────────────────────── */
.activity-feed {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    overflow-y: auto;
    max-height: 240px;
    padding-right: var(--space-2);
}

.activity-feed::-webkit-scrollbar {
    width: 4px;
}

.activity-feed::-webkit-scrollbar-track {
    background: var(--color-surface);
    border-radius: var(--radius-full);
}

.activity-feed::-webkit-scrollbar-thumb {
    background: var(--color-border-strong);
    border-radius: var(--radius-full);
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    animation: slideInFade 0.4s ease-out;
}

.activity-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-base);
    background: var(--color-elevated);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.activity-icon.success { background: rgba(34, 197, 94, 0.2); color: var(--color-success); }
.activity-icon.warning { background: rgba(245, 158, 11, 0.2); color: var(--color-warning); }
.activity-icon.danger { background: rgba(239, 68, 68, 0.2); color: var(--color-danger); }
.activity-icon.info { background: rgba(0, 240, 255, 0.2); color: var(--color-accent-primary); }

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

.activity-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    line-height: 1.4;
}

.activity-time {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

/* ─────────────────────────────────────────────────────────────────
   Mini Stats (Performance Widget)
   ───────────────────────────────────────────────────────────────── */
.mini-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    width: 100%;
}

.mini-stat {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: var(--space-1) var(--space-3);
    align-items: center;
}

.mini-stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mini-stat-value {
    font-family: var(--font-mono);
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-accent-primary);
    text-align: right;
}

.mini-stat-bar {
    grid-column: span 2;
    height: 6px;
    background: var(--color-surface);
    border-radius: var(--radius-full);
    position: relative;
    overflow: hidden;
}

.mini-stat-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: var(--progress, 0%);
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-tertiary));
    border-radius: var(--radius-full);
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px var(--color-accent-glow);
}

/* ─────────────────────────────────────────────────────────────────
   Buttons & Interactive Elements
   ───────────────────────────────────────────────────────────────── */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-display);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-base);
}

.btn-primary {
    color: var(--color-void);
    background: var(--color-accent-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--color-accent-glow);
}

/* Ripple Effect */
.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    transform: scale(0);
    opacity: 0;
    transition: transform 0.6s ease-out, opacity 0.6s ease-out;
}

.btn:active::after {
    transform: scale(2);
    opacity: 1;
    transition: none;
}

/* ─────────────────────────────────────────────────────────────────
   Tooltips
   ───────────────────────────────────────────────────────────────── */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::before,
[data-tooltip]::after {
    position: absolute;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--transition-fast);
    z-index: var(--z-tooltip);
}

[data-tooltip]::before {
    content: attr(data-tooltip);
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: 500;
    white-space: nowrap;
    color: var(--color-text-primary);
    background: var(--color-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

[data-tooltip]::after {
    content: '';
    bottom: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    border: 4px solid transparent;
    border-top-color: var(--color-elevated);
}

[data-tooltip]:hover::before,
[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ─────────────────────────────────────────────────────────────────
   Loading States
   ───────────────────────────────────────────────────────────────── */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-surface) 0%,
        var(--color-elevated) 50%,
        var(--color-surface) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-sm);
}

/* ─────────────────────────────────────────────────────────────────
   Focus States (Accessibility)
   ───────────────────────────────────────────────────────────────── */
:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

button:focus:not(:focus-visible) {
    outline: none;
}