/* ═══════════════════════════════════════════════════════════════════════════════
   COMMAND HUD - Modern Floating UI System
   Performance-first: GPU-accelerated transforms, will-change, contain
   ═══════════════════════════════════════════════════════════════════════════════ */

/* ═══════════════════════════════════════════════════════════════════════════════
   BASE CONTAINER
   ═══════════════════════════════════════════════════════════════════════════════ */
.command-hud {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 100;
    font-family: var(--font-main, 'Segoe UI', sans-serif);
}

/* Only enable pointer-events on specific interactive elements, not all children */
.hud-quick-stats,
.hud-empire-bar,
.hud-fleet-tracker,
.hud-agent-panel {
    pointer-events: auto;
}

/* Floating panels: pointer-events controlled by visibility state in their own rules */

/* ═══════════════════════════════════════════════════════════════════════════════
   QUICK STATS BAR (Top Right)
   ═══════════════════════════════════════════════════════════════════════════════ */
.hud-quick-stats {
    position: absolute;
    top: 60px;
    right: 16px;
    display: flex;
    gap: 8px;
    contain: layout style;
}

.quick-stat {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: rgba(10, 15, 30, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary, #9ca3b8);
    transition: all 0.2s ease;
    cursor: pointer;
}

.quick-stat:hover {
    background: rgba(20, 30, 50, 0.9);
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-2px);
}

.quick-stat.active {
    border-color: var(--accent, #00d4ff);
    box-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
}

.quick-stat .stat-icon {
    font-size: 14px;
}

.quick-stat .stat-value {
    font-weight: 600;
    color: var(--text-primary, #e8eaf0);
    min-width: 20px;
    text-align: center;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   EMPIRE BAR (Bottom Center)
   ═══════════════════════════════════════════════════════════════════════════════ */
.hud-empire-bar {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    contain: layout style;
    will-change: transform;
}

.empire-bar-inner {
    display: flex;
    gap: 4px;
    padding: 8px 16px;
    background: rgba(10, 15, 30, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    max-width: 90vw;
    overflow-x: auto;
    scrollbar-width: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.empire-bar-inner::-webkit-scrollbar {
    display: none;
}

.hud-empire-bar.expanded .empire-bar-inner {
    padding: 12px 20px;
    gap: 8px;
}

.empire-icon {
    position: relative;
    width: 52px;
    height: 68px;
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.3s ease,
                filter 0.2s ease;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hud-empire-bar.expanded .empire-icon {
    width: 64px;
    height: 80px;
}

.empire-icon:hover {
    transform: scale(1.15) translateY(-4px);
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.5)) drop-shadow(0 0 16px var(--empire-color));
    z-index: 10;
}

.empire-icon.leader {
    filter: drop-shadow(0 0 8px rgba(245, 200, 66, 0.6));
}

.empire-icon.leader:hover {
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.5)) drop-shadow(0 0 20px rgba(245, 200, 66, 0.8));
}

.empire-icon.eliminated {
    opacity: 0.4;
    filter: grayscale(0.7);
}

.empire-crest-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.empire-crest-icon svg {
    width: 100%;
    height: 100%;
}

.hud-empire-bar.expanded .empire-crest-icon {
    width: 52px;
    height: 52px;
}

.empire-rank-badge {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: 10px;
    font-weight: 700;
    padding: 1px 5px;
    border-radius: 8px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.empire-icon .crown {
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 14px;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.5));
    z-index: 5;
}

.empire-icon-bar {
    position: absolute;
    bottom: 18px;
    left: 4px;
    right: 4px;
    height: 3px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.empire-name-label {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    font-size: 8px;
    font-weight: 500;
    color: var(--text-secondary, #9ca3b8);
    white-space: nowrap;
    max-width: 56px;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
    padding: 0 2px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

.empire-icon:hover .empire-name-label {
    color: var(--text-primary, #e8eaf0);
}

.hud-empire-bar.expanded .empire-name-label {
    font-size: 9px;
    max-width: 64px;
}

/* Dynamic ranking animations */
.empire-icon.entering {
    opacity: 0;
    transform: scale(0.8) translateY(10px);
}

.empire-icon.exiting {
    opacity: 0;
    transform: scale(0.8) translateY(-10px);
    pointer-events: none;
}

.empire-rank-badge {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                background 0.3s ease;
}

.empire-rank-badge.rank-changed {
    animation: rank-pulse 0.5s ease;
}

@keyframes rank-pulse {
    0% { transform: translateX(-50%) scale(1); }
    30% { transform: translateX(-50%) scale(1.4); background: var(--accent, #00d4ff); }
    100% { transform: translateX(-50%) scale(1); }
}

.empire-bar-expand {
    margin-top: 4px;
    padding: 4px 12px;
    font-size: 10px;
    color: var(--text-dim, #5a6070);
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.empire-bar-expand:hover {
    opacity: 1;
}

.hud-empire-bar.expanded .empire-bar-expand span {
    transform: rotate(180deg);
    display: inline-block;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   SELECTION CARD (Floating)
   ═══════════════════════════════════════════════════════════════════════════════ */
.hud-selection-card {
    position: absolute;
    width: 280px;
    background: rgba(10, 15, 30, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 1px rgba(255, 255, 255, 0.1);
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transform: scale(0.95) translateY(8px);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    contain: layout style paint;
    will-change: transform, opacity;
}

.hud-selection-card.visible {
    opacity: 1;
    pointer-events: auto;
    transform: scale(1) translateY(0);
}

.selection-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.selection-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary, #e8eaf0);
}

.selection-close {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: none;
    border-radius: 50%;
    color: var(--text-secondary, #9ca3b8);
    cursor: pointer;
    transition: all 0.15s;
}

.selection-close:hover {
    background: rgba(244, 63, 94, 0.3);
    color: var(--danger, #f43f5e);
}

.selection-card-body {
    padding: 16px;
}

.selection-stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.selection-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.selection-stat .stat-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-dim, #5a6070);
}

.selection-stat .stat-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary, #e8eaf0);
}

.selection-resources {
    display: flex;
    gap: 12px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 12px;
    color: var(--text-secondary, #9ca3b8);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   FLEET TRACKER (Bottom Left)
   ═══════════════════════════════════════════════════════════════════════════════ */
.hud-fleet-tracker {
    position: absolute;
    bottom: 16px;
    right: 16px;
    width: 260px;
    background: rgba(10, 15, 30, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    overflow: hidden;
    contain: layout style;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hud-fleet-tracker:not(.has-fleets) {
    opacity: 0.5;
}

.hud-fleet-tracker.expanded {
    width: 320px;
}

.fleet-tracker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    font-size: 12px;
    color: var(--text-secondary, #9ca3b8);
}

.fleet-count {
    background: var(--accent, #00d4ff);
    color: var(--bg-space, #060610);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
}

.fleet-tracker-list {
    max-height: 280px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.hud-fleet-tracker.expanded .fleet-tracker-list {
    max-height: 400px;
}

.fleet-item {
    padding: 8px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.fleet-item:last-child {
    border-bottom: none;
}

.fleet-item-header {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    margin-bottom: 4px;
}

.fleet-ships {
    color: var(--text-primary, #e8eaf0);
}

.fleet-time {
    color: var(--accent, #00d4ff);
    font-weight: 500;
}

.fleet-progress {
    height: 3px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.fleet-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent, #00d4ff), var(--purple, #9855f7));
    border-radius: 2px;
    transition: width 0.5s linear;
}

.fleet-progress-bar.wormhole {
    background: linear-gradient(90deg, var(--purple, #9855f7), #ff55ff);
    animation: wormhole-pulse 1s ease infinite;
}

@keyframes wormhole-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.fleet-empty {
    padding: 16px;
    text-align: center;
    color: var(--text-dim, #5a6070);
    font-size: 11px;
}

/* Fleet Empire Cards - grouped by empire with crests */
.fleet-empire-card {
    padding: 10px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--empire-color, #888);
    background: linear-gradient(90deg, rgba(var(--empire-color-rgb, 128, 128, 128), 0.1) 0%, transparent 100%);
    transition: background 0.2s ease;
}

.fleet-empire-card:hover {
    background: linear-gradient(90deg, rgba(var(--empire-color-rgb, 128, 128, 128), 0.2) 0%, rgba(255, 255, 255, 0.03) 100%);
}

.fleet-empire-card:last-child {
    border-bottom: none;
}

.fleet-empire-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.fleet-empire-crest {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3),
                0 0 0 1px rgba(255, 255, 255, 0.1);
}

.fleet-empire-crest svg {
    width: 100%;
    height: 100%;
}

.fleet-empire-info {
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.fleet-empire-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary, #e8eaf0);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-shadow: 0 0 8px var(--empire-color, #888);
}

.fleet-empire-stats {
    display: flex;
    gap: 8px;
    font-size: 10px;
    color: var(--text-secondary, #9ca3b8);
    margin-top: 2px;
}

.fleet-stat {
    display: flex;
    align-items: center;
    gap: 2px;
}

.fleet-empire-eta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.fleet-empire-eta .wormhole-icon {
    font-size: 12px;
    animation: wormhole-pulse 1.5s ease infinite;
}

.fleet-empire-eta .eta-time {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent, #00d4ff);
}

.fleet-empire-card .fleet-progress {
    margin-top: 4px;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   EMPIRE DETAIL PANEL
   ═══════════════════════════════════════════════════════════════════════════════ */
.hud-empire-detail {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    width: 320px;
    background: rgba(10, 15, 30, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    contain: layout style paint;
}

.hud-empire-detail.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.empire-detail-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.empire-detail-crest {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
}

.empire-detail-info {
    flex: 1;
}

.empire-detail-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary, #e8eaf0);
    margin: 0;
}

.empire-detail-rank {
    font-size: 12px;
    color: var(--gold, #f5c842);
    font-weight: 500;
}

.empire-detail-close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: none;
    border-radius: 50%;
    color: var(--text-secondary, #9ca3b8);
    cursor: pointer;
    font-size: 16px;
    transition: all 0.15s;
}

.empire-detail-close:hover {
    background: rgba(244, 63, 94, 0.3);
    color: var(--danger, #f43f5e);
}

.empire-detail-body {
    padding: 16px;
}

.empire-detail-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.empire-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 8px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
}

.empire-stat .stat-icon {
    font-size: 18px;
    margin-bottom: 4px;
}

.empire-stat .stat-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary, #e8eaf0);
}

.empire-stat .stat-label {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-dim, #5a6070);
    margin-top: 2px;
}

.empire-detail-species {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.species-name {
    font-size: 12px;
    color: var(--text-secondary, #9ca3b8);
}

/* ═══════════════════════════════════════════════════════════════════════════════
   AGENT PANEL (Right Slide)
   ═══════════════════════════════════════════════════════════════════════════════ */
.hud-agent-panel {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    contain: layout style;
}

.hud-agent-panel.collapsed .agent-panel-content {
    width: 0;
    padding: 0;
    opacity: 0;
    pointer-events: none;
}

.agent-panel-tab {
    width: 40px;
    height: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    background: rgba(10, 15, 30, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-right: none;
    border-radius: 12px 0 0 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.agent-panel-tab:hover {
    background: rgba(20, 30, 50, 0.9);
}

.agent-panel-tab span:first-child {
    font-size: 18px;
}

.agent-badge {
    background: var(--accent, #00d4ff);
    color: var(--bg-space, #060610);
    padding: 1px 6px;
    border-radius: 8px;
    font-size: 10px;
    font-weight: 600;
}

.agent-panel-content {
    width: 240px;
    background: rgba(10, 15, 30, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px 0 0 12px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.agent-panel-header {
    padding: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.agent-panel-header input {
    width: 100%;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary, #e8eaf0);
    font-size: 12px;
    outline: none;
    transition: border-color 0.2s;
}

.agent-panel-header input:focus {
    border-color: var(--accent, #00d4ff);
}

.agent-panel-header input::placeholder {
    color: var(--text-dim, #5a6070);
}

.agent-panel-list {
    max-height: 300px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.agent-item-hud {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    cursor: pointer;
    transition: background 0.15s;
}

.agent-item-hud:hover {
    background: rgba(255, 255, 255, 0.05);
}

.agent-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.agent-name {
    font-size: 12px;
    color: var(--text-primary, #e8eaf0);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.agent-empire {
    font-size: 10px;
    color: var(--text-dim, #5a6070);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 60px;
}

.agent-empty {
    padding: 24px;
    text-align: center;
    color: var(--text-dim, #5a6070);
    font-size: 12px;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   HIDE OLD SIDEBAR WHEN HUD IS ACTIVE
   ═══════════════════════════════════════════════════════════════════════════════ */
body.hud-mode .info-panel {
    display: none !important;
}

body.hud-mode .main-layout {
    grid-template-columns: 1fr !important;
}

body.hud-mode .universe-panel {
    border-radius: 0 !important;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
    .hud-quick-stats {
        top: auto;
        bottom: 80px;
        right: 8px;
        flex-direction: column;
    }
    
    .hud-empire-bar {
        bottom: 8px;
    }
    
    .empire-bar-inner {
        padding: 6px 12px;
        gap: 2px;
    }
    
    .empire-icon {
        width: 28px;
        height: 28px;
    }
    
    .hud-fleet-tracker {
        display: none;
    }
    
    .hud-agent-panel {
        display: none;
    }
    
    .hud-selection-card {
        width: 260px;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   PERFORMANCE HINTS
   ═══════════════════════════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
    .command-hud * {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}