/* ===================================
   CSS VARIABLES & RESET
   =================================== */

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

:root {
    /* Colors */
    --color-primary: #2196F3;
    --color-primary-dark: #1976D2;
    --color-primary-light: #BBDEFB;
    --color-secondary: #9E9E9E;
    --color-success: #4CAF50;
    --color-error: #F44336;
    --color-warning: #FF9800;
    --color-bg: #F5F7FA;
    --color-surface: #FFFFFF;
    --color-surface-hover: #F8F9FA;
    --color-text: #2C3E50;
    --color-text-secondary: #7F8C8D;
    --color-border: #DDE1E7;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);
    --shadow-xl: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);

    /* Fonts */
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --font-primary: var(--font-main);
    --font-heading: var(--font-main);
    --font-mono: 'Fira Code', monospace;
}

html,
body {
    height: 100vh;
    width: 100vw;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
}

#app {
    height: 100vh;
    width: 100vw;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.screen {
    display: none;
    height: 100%;
    width: 100%;
}

.screen.active {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-md);
}

/* ===================================
   BUTTONS
   =================================== */

button {
    font-family: var(--font-primary);
    font-size: 1rem;
    cursor: pointer;
    border: none;
    outline: none;
    transition: all var(--transition-normal);
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background-color: var(--color-surface);
    color: var(--color-text);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-border);
    font-weight: 500;
}

.btn-secondary:hover {
    background-color: var(--color-surface-hover);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-icon {
    background-color: transparent;
    color: var(--color-text);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

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

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===================================
   MAIN MENU
   =================================== */

.app-header {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
}

.app-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.app-subtitle {
    font-size: 1rem;
    opacity: 0.95;
    font-weight: 400;
}

.game-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.game-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.game-card:not(.disabled):hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
    outline: 3px solid var(--color-primary);
    outline-offset: 4px;
}

.game-card.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.game-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.game-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.game-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    min-height: 2.5rem;
    font-size: 0.9rem;
}

.game-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.game-meta span {
    background-color: var(--color-bg);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.game-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background-color: var(--color-warning);
    color: white;
    padding: 2px var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

/* ===================================
   GAME SCREEN (Structure)
   =================================== */

.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    background-color: var(--color-surface);
    box-shadow: var(--shadow-sm);
    height: 60px;
    flex-shrink: 0;
}

.game-title-header {
    font-size: 1.25rem;
    margin: 0;
    flex: 1;
    text-align: center;
}

.level-indicator {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    background-color: var(--color-bg);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
}

#current-level {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 1.1rem;
}

.game-container {
    flex: 1;
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    overflow: hidden;
    background-color: var(--color-bg);
    min-height: 0;
    /* CRITICAL for flex scrolling */
}

/* Ensure any injected containers fill the space */
.game-container>div {
    width: 100%;
    height: 100%;
    min-height: 0;
}

/* Base components that games use */
.object-view,
.construction-panel,
.construction-area,
.game-3d-scene,
#mini-scene-container {
    flex: 1;
    position: relative;
    background-color: #ECF0F1;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    min-height: 0;
}

.game-controls {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    padding: var(--spacing-sm);
    background-color: var(--color-surface);
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    height: 64px;
    flex-shrink: 0;
}

/* ===================================
   MODAL
   =================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn var(--transition-normal);
}

.modal {
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xxl);
    max-width: 500px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--transition-normal);
}

.modal-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
}

.modal-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.modal-message {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 1.125rem;
}

/* ===================================
   ANIMATIONS
   =================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

/* ===================================
   RESPONSIVE
   =================================== */

@media (max-width: 768px) {
    .app-title {
        font-size: 2rem;
    }

    .game-selector {
        grid-template-columns: 1fr;
        padding: var(--spacing-lg);
    }

    .game-container {
        flex-direction: column;
        padding: var(--spacing-md);
        overflow: auto;
    }
}

/* ===================================
   UTILITY CLASSES
   =================================== */

.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-success {
    color: var(--color-success);
}

.text-error {
    color: var(--color-error);
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}