/* Utopolis - Terminal Aesthetic */
:root {
    --bg: #000000;
    --primary: #00ff41;
    --primary-dim: #00aa2d;
    --primary-dark: #004d13;
    --player: #00ff41;
    --enemy: #ff0040;
    --neutral: #555555;
    --panel-bg: rgba(0, 0, 0, 0.95);
    --panel-border: #00ff41;

    /* Terrain colors - vibrant and distinguishable */
    --terrain-grass: #44aa44;     /* Light green (food) */
    --terrain-forest: #1a6a1a;    /* Dark green (wood) */
    --terrain-hills: #8a6a3a;     /* Brown (stone) */
    --terrain-water: #3388dd;     /* Bright blue */
    --terrain-mountain: #5a5a5a;
    --terrain-desert: #6a6a3a;

    /* Map edge glow */
    --map-edge: #00ff41;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--bg);
    color: var(--primary);
    font-family: 'Courier New', 'Lucida Console', monospace;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
}

#game-canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

/* UI Overlay */
#ui-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#ui-overlay > * {
    pointer-events: auto;
}

/* Top HUD */
#hud {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
}

#game-title {
    font-size: 24px;
    font-weight: bold;
    text-shadow: 0 0 10px var(--primary);
    letter-spacing: 4px;
}

#turn-info {
    display: flex;
    gap: 20px;
    font-size: 16px;
}

#turn-counter {
    color: var(--primary);
}

#age-display {
    color: var(--primary-dim);
    text-transform: uppercase;
}

#resources {
    display: flex;
    gap: 15px;
    font-size: 14px;
}

.resource {
    padding: 4px 8px;
    border: 1px solid var(--primary-dim);
    background: white;
}

#food { border-color: #44ff44; }
#wood { border-color: #8b5a2b; color: #8b5a2b; }
#stone { border-color: #888888; color: #888888; }

/* Bottom Buttons Container */
#bottom-buttons {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
}

/* Common Button Style */
#end-turn-btn,
#age-btn {
    padding: 15px 30px;
    font-family: inherit;
    font-size: 16px;
    font-weight: bold;
    color: var(--bg);
    background: var(--primary);
    border: 2px solid var(--primary);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.2s ease;
}

#end-turn-btn:hover,
#age-btn:hover {
    background: var(--bg);
    color: var(--primary);
    box-shadow: 0 0 20px var(--primary);
}

#end-turn-btn:disabled,
#age-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Panels */
.panel {
    position: absolute;
    background: var(--panel-bg);
    border: 2px solid var(--panel-border);
    min-width: 200px;
    max-width: 300px;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: rgba(0, 255, 65, 0.15);
    border-bottom: 1px solid var(--primary-dim);
    font-weight: bold;
    font-size: 14px;
    letter-spacing: 1px;
}

.close-btn {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 20px;
    cursor: pointer;
    padding: 0 5px;
}

.close-btn:hover {
    color: var(--enemy);
}

/* Info Panel */
#info-panel {
    bottom: 20px;
    left: 20px;
}

#info-content {
    padding: 12px;
    font-size: 13px;
    line-height: 1.6;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 2px 0;
}

.stat-label {
    color: var(--primary-dim);
}

.stat-value {
    color: var(--primary);
}

.health-bar {
    width: 100%;
    height: 8px;
    background: #222;
    margin-top: 8px;
    border: 1px solid var(--primary-dim);
}

.health-bar-fill {
    height: 100%;
    background: var(--primary);
    transition: width 0.3s ease;
}

.health-bar-fill.warning {
    background: #ffff00;
}

.health-bar-fill.danger {
    background: var(--enemy);
}

/* Production Panel */
#production-panel {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#production-content {
    padding: 12px;
}

.production-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px;
    margin: 4px 0;
    border: 1px solid var(--primary-dim);
    cursor: pointer;
    transition: all 0.2s ease;
}

.production-item:hover {
    background: rgba(0, 255, 65, 0.2);
    border-color: var(--primary);
}

.production-item.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.production-item.disabled:hover {
    background: none;
    border-color: var(--primary-dim);
}

.unit-name {
    font-weight: bold;
}

.unit-cost {
    font-size: 11px;
    color: var(--primary-dim);
}

/* Settler Panel */
#settler-panel {
    bottom: 80px;
    left: 20px;
}

#settler-content {
    padding: 8px;
}

.settler-action {
    display: block;
    width: 100%;
    padding: 8px 12px;
    margin: 4px 0;
    font-family: inherit;
    font-size: 12px;
    color: var(--primary);
    background: transparent;
    border: 1px solid var(--primary-dim);
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
}

.settler-action:hover {
    background: rgba(0, 255, 65, 0.2);
    border-color: var(--primary);
}

.settler-action.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Age Panel */
#age-panel {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#age-content {
    padding: 16px;
    text-align: center;
}

.age-name {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 12px;
    text-shadow: 0 0 10px var(--primary);
}

.age-requirements {
    font-size: 12px;
    color: var(--primary-dim);
    margin-bottom: 16px;
}

.advance-btn {
    padding: 10px 20px;
    font-family: inherit;
    font-size: 14px;
    font-weight: bold;
    color: var(--bg);
    background: var(--primary);
    border: none;
    cursor: pointer;
    text-transform: uppercase;
}

.advance-btn:hover {
    box-shadow: 0 0 15px var(--primary);
}

.advance-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Overlays */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
}

#victory-content,
#pause-content {
    text-align: center;
    padding: 40px;
    border: 2px solid var(--primary);
    background: var(--bg);
}

#victory-title {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 0 0 30px var(--primary);
    letter-spacing: 8px;
}

#victory-title.defeat {
    color: var(--enemy);
    text-shadow: 0 0 30px var(--enemy);
}

#victory-reason {
    font-size: 16px;
    color: var(--primary-dim);
    margin-bottom: 30px;
}

#play-again-btn,
#resume-btn,
#restart-btn {
    padding: 12px 30px;
    margin: 5px;
    font-family: inherit;
    font-size: 16px;
    font-weight: bold;
    color: var(--bg);
    background: var(--primary);
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
}

#play-again-btn:hover,
#resume-btn:hover,
#restart-btn:hover {
    box-shadow: 0 0 20px var(--primary);
}

/* AI Indicator */
#ai-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px 40px;
    background: var(--panel-bg);
    border: 2px solid var(--enemy);
    color: var(--enemy);
    font-size: 18px;
    letter-spacing: 2px;
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ===========================
   INSTRUCTIONS OVERLAY
   =========================== */

#instructions-content {
    width: 90%;
    max-width: 800px;
    max-height: 85vh;
    background: var(--bg);
    border: 2px solid var(--primary);
    display: flex;
    flex-direction: column;
}

.instructions-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--primary-dim);
    background: rgba(0, 255, 65, 0.1);
}

.instructions-header h1 {
    font-size: 28px;
    letter-spacing: 6px;
    text-shadow: 0 0 15px var(--primary);
    margin: 0;
}

.instructions-header .close-btn {
    font-size: 28px;
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    padding: 0 10px;
}

.instructions-header .close-btn:hover {
    color: var(--enemy);
}

#instructions-body {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}

/* Tab Navigation */
.instructions-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    padding: 15px;
    border-bottom: 1px solid var(--primary-dark);
    background: rgba(0, 0, 0, 0.5);
}

.instructions-tab {
    padding: 8px 16px;
    font-family: inherit;
    font-size: 12px;
    font-weight: bold;
    color: var(--primary-dim);
    background: transparent;
    border: 1px solid var(--primary-dim);
    cursor: pointer;
    letter-spacing: 1px;
    transition: all 0.2s ease;
}

.instructions-tab:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(0, 255, 65, 0.1);
}

.instructions-tab.active {
    color: var(--bg);
    background: var(--primary);
    border-color: var(--primary);
}

/* Tab Content Panels */
.instructions-panel {
    display: none;
    padding: 20px;
    line-height: 1.6;
}

.instructions-panel.active {
    display: block;
}

.instructions-panel h2 {
    font-size: 20px;
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--primary-dim);
    letter-spacing: 3px;
    text-shadow: 0 0 10px var(--primary);
}

.instructions-panel h3 {
    font-size: 14px;
    margin: 20px 0 10px 0;
    color: var(--primary);
    letter-spacing: 2px;
}

.instructions-panel p {
    color: var(--primary-dim);
    margin-bottom: 10px;
}

.instructions-panel .intro-text {
    color: var(--primary);
    margin-bottom: 15px;
}

.instructions-panel .note {
    font-size: 12px;
    color: var(--primary-dark);
    font-style: italic;
    margin-top: 15px;
    padding-top: 10px;
    border-top: 1px dashed var(--primary-dark);
}

.instructions-panel .note-text {
    font-size: 12px;
    color: var(--primary-dark);
    margin-bottom: 10px;
}

.highlight {
    color: var(--primary);
    font-weight: bold;
}

/* Controls Tab */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 12px;
    border: 1px solid var(--primary-dark);
    background: rgba(0, 255, 65, 0.05);
}

.control-item .key {
    color: var(--primary);
    font-weight: bold;
    min-width: 140px;
}

.control-item .action {
    color: var(--primary-dim);
    text-align: right;
}

/* Resources Tab */
.resource-list,
.improvement-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 15px;
}

.resource-item,
.improvement-item {
    display: flex;
    gap: 15px;
    padding: 8px 12px;
    border: 1px solid var(--primary-dark);
}

.resource-name {
    font-weight: bold;
    min-width: 80px;
}

.food-color { color: #44ff44; }
.wood-color { color: #c49a6c; }
.stone-color { color: #888888; }

.resource-desc {
    color: var(--primary-dim);
}

.improvement-name {
    color: var(--primary);
    font-weight: bold;
    min-width: 100px;
}

.improvement-terrain {
    color: var(--primary-dark);
    min-width: 80px;
}

.improvement-yield {
    color: var(--primary-dim);
}

/* Units Tab - Table */
.unit-table {
    border: 1px solid var(--primary-dim);
    margin-bottom: 15px;
}

.unit-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 0.7fr 0.7fr 0.7fr 0.7fr;
    gap: 10px;
    padding: 8px 12px;
    border-bottom: 1px solid var(--primary-dark);
}

.unit-row:last-child {
    border-bottom: none;
}

.unit-row.header {
    background: rgba(0, 255, 65, 0.15);
    color: var(--primary);
    font-weight: bold;
    font-size: 12px;
    letter-spacing: 1px;
}

.unit-row span {
    color: var(--primary-dim);
}

.unit-row:not(.header):hover {
    background: rgba(0, 255, 65, 0.08);
}

/* Ages Tab */
.age-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.age-item {
    padding: 12px;
    border: 1px solid var(--primary-dim);
    background: rgba(0, 255, 65, 0.05);
}

.age-name {
    display: block;
    font-size: 16px;
    font-weight: bold;
    color: var(--primary);
    letter-spacing: 2px;
    margin-bottom: 5px;
}

.age-req {
    display: block;
    font-size: 12px;
    color: var(--primary-dark);
    margin-bottom: 3px;
}

.age-unlock {
    display: block;
    font-size: 13px;
    color: var(--primary-dim);
}

/* Combat Tab */
.combat-rules {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.rule {
    padding: 12px;
    border: 1px solid var(--primary-dark);
}

.rule h3 {
    margin: 0 0 8px 0;
    font-size: 14px;
}

.rule p {
    margin: 5px 0;
}

/* Victory Tab */
.victory-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.victory-item {
    padding: 15px;
    border: 2px solid var(--primary-dim);
    background: rgba(0, 255, 65, 0.08);
}

.victory-name {
    display: block;
    font-size: 16px;
    font-weight: bold;
    color: var(--primary);
    letter-spacing: 2px;
    margin-bottom: 8px;
    text-shadow: 0 0 8px var(--primary);
}

.victory-item p {
    margin: 0;
}

.tips-list {
    list-style: none;
    padding: 0;
    margin: 10px 0;
}

.tips-list li {
    padding: 6px 0 6px 20px;
    color: var(--primary-dim);
    position: relative;
}

.tips-list li::before {
    content: ">";
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* Help Button Styling */
#help-btn {
    width: 50px;
    height: 50px;
    padding: 0;
    font-family: inherit;
    font-size: 24px;
    font-weight: bold;
    color: var(--bg);
    background: var(--primary);
    border: 2px solid var(--primary);
    cursor: pointer;
    transition: all 0.2s ease;
    pointer-events: auto;
}

#help-btn:hover {
    background: var(--bg);
    color: var(--primary);
    box-shadow: 0 0 20px var(--primary);
}

/* Responsive adjustments for Instructions */
@media (max-width: 600px) {
    #instructions-content {
        width: 95%;
        max-height: 90vh;
    }

    .instructions-tabs {
        justify-content: center;
    }

    .instructions-tab {
        padding: 6px 10px;
        font-size: 10px;
    }

    .unit-row {
        font-size: 11px;
        gap: 5px;
        padding: 6px 8px;
    }

    .control-item {
        flex-direction: column;
        gap: 5px;
    }

    .control-item .key,
    .control-item .action {
        text-align: left;
    }
}

/* Hidden utility */
.hidden {
    display: none !important;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-dim);
    border: 1px solid var(--primary);
}

/* Selection glow effect */
.selected {
    box-shadow: 0 0 15px var(--primary);
}