/* ========================================================================
   GamePocGen - Base Game Styles
   Dark theme for incremental/idle games
   ======================================================================== */

:root {
    --game-bg: #0a0a0f;
    --game-surface: #12121a;
    --game-surface-hover: #1a1a25;
    --game-border: #2d2d3a;
    --game-text: #e2e8f0;
    --game-text-dim: #94a3b8;
    --game-accent: #6366f1;
    --game-accent-glow: rgba(99, 102, 241, 0.3);
    --game-success: #22c55e;
    --game-warning: #f59e0b;
    --game-danger: #ef4444;
    --game-gold: #fbbf24;
    --game-purple: #8b5cf6;
    --game-cyan: #22d3ee;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--game-bg);
    color: var(--game-text);
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ========================================================================
   Layout
   ======================================================================== */

.game-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: grid;
    grid-template-rows: auto 1fr;
    min-height: 100vh;
}

.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--game-surface);
    border: 1px solid var(--game-border);
    border-radius: 12px;
    margin-bottom: 1rem;
}

.game-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #fff, var(--game-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.game-main {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 1rem;
}

.game-sidebar {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.game-content {
    background: var(--game-surface);
    border: 1px solid var(--game-border);
    border-radius: 12px;
    padding: 1.5rem;
    min-height: 400px;
}

/* ========================================================================
   Resource Bar
   ======================================================================== */

.resource-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--game-surface);
    border: 1px solid var(--game-border);
    border-radius: 10px;
    transition: border-color 0.2s;
}

.resource-bar:hover {
    border-color: var(--game-accent);
}

.resource-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    background: linear-gradient(135deg, var(--game-gold), #f59e0b);
    flex-shrink: 0;
}

.resource-info {
    flex: 1;
    min-width: 0;
}

.resource-name {
    font-size: 0.75rem;
    color: var(--game-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.resource-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--game-gold);
    line-height: 1.2;
}

.resource-rate {
    font-size: 0.75rem;
    color: var(--game-success);
}

.resource-rate.negative {
    color: var(--game-danger);
}

/* ========================================================================
   Upgrade Button
   ======================================================================== */

.upgrade-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--game-surface);
    border: 1px solid var(--game-border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    text-align: left;
    color: var(--game-text);
    font-family: inherit;
    font-size: inherit;
}

.upgrade-btn:hover {
    background: var(--game-surface-hover);
    border-color: var(--game-accent);
    transform: translateY(-1px);
}

.upgrade-btn:active {
    transform: translateY(0);
}

.upgrade-btn.affordable {
    border-color: var(--game-success);
    box-shadow: 0 0 12px rgba(34, 197, 94, 0.15);
}

.upgrade-btn.affordable:hover {
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.25);
}

.upgrade-btn.locked {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.upgrade-btn.maxed {
    border-color: var(--game-purple);
    opacity: 0.7;
}

.upgrade-icon {
    width: 44px;
    height: 44px;
    background: var(--game-bg);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.upgrade-info {
    flex: 1;
    min-width: 0;
}

.upgrade-name {
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.2;
}

.upgrade-desc {
    font-size: 0.8rem;
    color: var(--game-text-dim);
}

.upgrade-cost {
    text-align: right;
    flex-shrink: 0;
}

.upgrade-cost-value {
    font-weight: 700;
    color: var(--game-gold);
    font-size: 0.95rem;
}

.upgrade-level {
    font-size: 0.75rem;
    color: var(--game-text-dim);
}

/* Tooltip */
.upgrade-tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--game-bg);
    border: 1px solid var(--game-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    color: var(--game-text-dim);
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 100;
}

.upgrade-btn:hover .upgrade-tooltip {
    opacity: 1;
}

/* ========================================================================
   Progress Bar
   ======================================================================== */

.progress-container {
    margin-bottom: 0.75rem;
}

.progress-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.4rem;
    font-size: 0.85rem;
    color: var(--game-text-dim);
}

.progress-bar {
    height: 8px;
    background: var(--game-bg);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--game-accent), var(--game-purple));
    border-radius: 4px;
    transition: width 0.3s ease;
    position: relative;
}

.progress-fill.animated::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-fill.complete {
    background: linear-gradient(90deg, var(--game-success), #10b981);
}

/* ========================================================================
   Tab System
   ======================================================================== */

.tabs {
    width: 100%;
}

.tab-header {
    display: flex;
    background: var(--game-bg);
    border-radius: 10px 10px 0 0;
    border: 1px solid var(--game-border);
    border-bottom: none;
    overflow-x: auto;
}

.tab-btn {
    padding: 0.75rem 1.25rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--game-text-dim);
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
    font-size: 0.9rem;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--game-text);
    background: var(--game-surface);
}

.tab-btn.active {
    color: var(--game-accent);
    border-bottom-color: var(--game-accent);
    background: var(--game-surface);
}

.tab-content {
    background: var(--game-surface);
    border: 1px solid var(--game-border);
    border-radius: 0 0 10px 10px;
    padding: 1.5rem;
    min-height: 200px;
}

.tab-panel {
    display: none;
}

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

/* ========================================================================
   Skill Tree
   ======================================================================== */

.skill-tree {
    position: relative;
    padding: 2rem;
    background: var(--game-bg);
    border-radius: 12px;
    overflow: auto;
    min-height: 300px;
}

.skill-node {
    position: absolute;
    width: 64px;
    height: 64px;
    background: var(--game-surface);
    border: 2px solid var(--game-border);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    cursor: pointer;
    transition: all 0.2s;
    z-index: 2;
}

.skill-node:hover {
    border-color: var(--game-accent);
    transform: scale(1.08);
    z-index: 3;
}

.skill-node.unlocked {
    border-color: var(--game-success);
    background: rgba(34, 197, 94, 0.1);
}

.skill-node.available {
    border-color: var(--game-accent);
    box-shadow: 0 0 20px var(--game-accent-glow);
    animation: node-pulse 2s infinite;
}

@keyframes node-pulse {
    0%, 100% { box-shadow: 0 0 20px var(--game-accent-glow); }
    50% { box-shadow: 0 0 30px var(--game-accent-glow), 0 0 40px rgba(99, 102, 241, 0.15); }
}

.skill-node.locked {
    opacity: 0.4;
    cursor: not-allowed;
}

.skill-node-label {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    color: var(--game-text-dim);
    white-space: nowrap;
}

.skill-connector {
    position: absolute;
    background: var(--game-border);
    z-index: 1;
}

.skill-connector.active {
    background: var(--game-success);
}

.skill-connector.horizontal {
    height: 2px;
}

.skill-connector.vertical {
    width: 2px;
}

/* ========================================================================
   Notifications & Floating Text
   ======================================================================== */

.notification-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.notification {
    background: var(--game-surface);
    border: 1px solid var(--game-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    animation: slide-in 0.3s ease, fade-out 0.5s ease 2.5s forwards;
    max-width: 300px;
}

.notification.success { border-left: 3px solid var(--game-success); }
.notification.warning { border-left: 3px solid var(--game-warning); }
.notification.error { border-left: 3px solid var(--game-danger); }
.notification.unlock { border-left: 3px solid var(--game-purple); }

@keyframes slide-in {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes fade-out {
    to { opacity: 0; transform: translateY(-10px); }
}

/* Floating damage/income numbers */
.float-text {
    position: absolute;
    font-weight: 700;
    pointer-events: none;
    animation: float-up 1s ease forwards;
    z-index: 50;
}

.float-text.positive { color: var(--game-success); }
.float-text.negative { color: var(--game-danger); }
.float-text.special { color: var(--game-gold); font-size: 1.2em; }

@keyframes float-up {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-40px); }
}

/* ========================================================================
   Buttons & Controls
   ======================================================================== */

.btn {
    padding: 0.6rem 1.2rem;
    background: var(--game-accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--game-accent-glow);
}

.btn:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--game-surface);
    border: 1px solid var(--game-border);
    color: var(--game-text);
}

.btn-danger {
    background: var(--game-danger);
}

.btn-success {
    background: var(--game-success);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

/* ========================================================================
   Sprite Canvas
   ======================================================================== */

.sprite-canvas {
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

/* ========================================================================
   Utilities
   ======================================================================== */

.text-gold { color: var(--game-gold); }
.text-success { color: var(--game-success); }
.text-danger { color: var(--game-danger); }
.text-accent { color: var(--game-accent); }
.text-dim { color: var(--game-text-dim); }
.text-bold { font-weight: 700; }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.75rem; }
.text-center { text-align: center; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: 0.5rem; }
.gap-md { gap: 1rem; }
.gap-lg { gap: 1.5rem; }

.mt-sm { margin-top: 0.5rem; }
.mt-md { margin-top: 1rem; }
.mb-sm { margin-bottom: 0.5rem; }
.mb-md { margin-bottom: 1rem; }

.hidden { display: none !important; }

/* ========================================================================
   Responsive
   ======================================================================== */

@media (max-width: 768px) {
    .game-main {
        grid-template-columns: 1fr;
    }

    .game-sidebar {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .resource-bar {
        flex: 1;
        min-width: 140px;
    }

    .tab-header {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

@media (max-width: 480px) {
    .game-container {
        padding: 0.5rem;
    }

    .game-header {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}