:root {
    --bg-dark: #121212;
    --panel-bg: #1e1e24;
    --border-color: #2c2c35;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --accent-neon: #00ffcc;
    --accent-hover: #00cca3;
    --accent-glow: rgba(0, 255, 204, 0.4);
    --disabled-bg: #3a3a45;
    --disabled-text: #6b6b7a;
    --card-bg: #25252c;
    --font-main: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    overflow-x: hidden;
}

/* Dashboard Layout */
.dashboard-container {
    display: grid;
    grid-template-columns: 280px 1fr 340px;
    gap: 1.5rem;
    width: 100%;
    max-width: 1400px;
    height: 90vh;
}

@media (max-width: 1024px) {
    .dashboard-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto; /* Stack panels vertically */
        height: auto;
    }
}

/* Panels */
.panel {
    background-color: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    overflow: hidden; /* Important for rounding corners naturally */
}

header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Left Panel - Stats */
.stat-card {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 1.25rem;
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
    border: 1px solid transparent;
    transition: transform 0.2s, border-color 0.2s;
}

.stat-card.primary {
    border-color: var(--accent-neon);
    box-shadow: 0 0 15px var(--accent-glow);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 800;
}

.text-glow {
    color: var(--accent-neon);
    text-shadow: 0 0 8px var(--accent-glow);
}

/* Center Panel - Actions */
.actions-panel {
    align-items: center;
}

.actions-panel header {
    width: 100%;
    text-align: center;
}

.action-center {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.mega-button {
    background-color: transparent;
    border: 2px solid var(--accent-neon);
    color: var(--accent-neon);
    font-size: 1.5rem;
    font-weight: 800;
    padding: 1.5rem 3rem;
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.2s ease-in-out;
    box-shadow: 0 0 20px var(--accent-glow);
    white-space: nowrap;
}

.mega-button:hover {
    background-color: var(--accent-neon);
    color: var(--bg-dark);
    box-shadow: 0 0 30px var(--accent-glow);
    transform: scale(1.05);
}

.mega-button:active {
    transform: scale(0.95);
}

/* Right Panel - Upgrades */
.upgrades-panel {
    display: flex;
    flex-direction: column;
}

.upgrades-list {
    flex: 1;
    overflow-y: auto;
    padding-right: 0.5rem;
}

/* Custom Scrollbar for Upgrades List */
.upgrades-list::-webkit-scrollbar {
    width: 6px;
}
.upgrades-list::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 3px;
}

.upgrade-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: border-color 0.2s;
}

.upgrade-item:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

.upgrade-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.upgrade-name {
    font-weight: 600;
    font-size: 1rem;
}

.upgrade-owned {
    background-color: var(--border-color);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.upgrade-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.4;
}

.btn-buy {
    background-color: var(--accent-neon);
    color: var(--bg-dark);
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    width: 100%;
}

.btn-buy:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

.btn-buy:active:not(:disabled) {
    transform: scale(0.98);
}

/* Spec: Disabled buttons must be clearly grayed out with not-allowed cursor */
.btn-buy:disabled {
    background-color: var(--disabled-bg);
    color: var(--disabled-text);
    cursor: not-allowed;
    box-shadow: none;
}

/* Notification Toaster */
.toaster {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--accent-neon);
    color: var(--bg-dark);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 10px 30px rgba(0, 255, 204, 0.4);
    z-index: 1000;
    transition: opacity 0.3s, transform 0.3s;
}

.toaster.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
    pointer-events: none;
}

.toaster button {
    background: rgba(0,0,0,0.2);
    border: none;
    color: var(--bg-dark);
    padding: 5px 10px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 800;
}

/* Signature Watermark */
.watermark {
    position: fixed;
    bottom: 10px;
    right: 10px;
    font-size: 11px;
    color: #555555;
    pointer-events: none;
}

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