/* Entorno Matemático - Estilo Brainingcamp Layout */
:root {
    --bc-bg: #e5e7eb;
    --bc-sidebar-bg: #f8fafc;
    --bc-header-bg: #ffffff;
    --bc-toolbar-bg: #ffffff;
    --bc-border: #cbd5e1;
    --bc-accent: #0ea5e9;
    --bc-text: #334155;
    --bc-dark: #0f172a;
    --bc-grid: #cbd5e1;
}

body.bc-app {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: 'Inter', sans-serif;
    background-color: var(--bc-bg);
    color: var(--bc-text);
}

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

/* HEADER */
.bc-header {
    height: 50px;
    background-color: var(--bc-header-bg);
    border-bottom: 1px solid var(--bc-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    z-index: 10;
}

.bc-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.back-link {
    color: var(--bc-text);
    font-size: 1.2rem;
    text-decoration: none;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--bc-accent);
}

.bc-title {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--bc-dark);
}

.bc-header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.score-badge {
    background: #f1f5f9;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-weight: 600;
    color: #eab308;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--bc-border);
}

.score-badge span {
    color: var(--bc-text);
}

.btn-icon {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    color: var(--bc-text);
    cursor: pointer;
    transition: color 0.2s, transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
}

.btn-icon:hover {
    color: var(--bc-accent);
    background: #f1f5f9;
}

/* MAIN LAYOUT */
.bc-main-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* SIDEBAR */
.bc-sidebar {
    width: 100px;
    background-color: var(--bc-sidebar-bg);
    border-right: 1px solid var(--bc-border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 0;
    overflow-y: auto;
    z-index: 5;
    box-shadow: 2px 0 5px rgba(0,0,0,0.02);
}

.block-generators {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.generator-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: transform 0.1s;
    user-select: none;
}

.generator-item:hover {
    transform: scale(1.05);
}

.generator-item span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--bc-text);
}

/* BLOCKS PREVIEW & ACTUAL */
.preview-block {
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: inset 0 0 10px rgba(255,255,255,0.4);
    border: 2px solid rgba(0,0,0,0.1);
    border-radius: 4px;
}

.unit-pos { width: 40px; height: 40px; background-color: #3b82f6; } /* Azul */
.unit-neg { width: 40px; height: 40px; background-color: #ef4444; } /* Rojo */
.x-pos { width: 40px; height: 120px; background-color: #10b981; }   /* Verde */
.x-neg { width: 40px; height: 120px; background-color: #ef4444; }   /* Rojo */
.x2-pos { width: 100px; height: 100px; background-color: #eab308; } /* Amarillo */

.math-block {
    position: absolute;
    cursor: grab;
    user-select: none;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border: 2px solid rgba(0,0,0,0.1);
    border-radius: 6px;
    touch-action: none;
    z-index: 2;
}

.math-block:active {
    cursor: grabbing;
    z-index: 1000 !important;
    box-shadow: 0 8px 15px rgba(0,0,0,0.2);
}

.math-block.snapping {
    transition: left 0.15s ease-out, top 0.15s ease-out;
}

/* WORKSPACE */
.bc-workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background-color: #ffffff;
}

.playground {
    flex: 1;
    position: relative;
    overflow: hidden;
    background-image: 
        radial-gradient(circle, var(--bc-grid) 1px, transparent 1px),
        radial-gradient(circle, var(--bc-grid) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: 0 0, 20px 20px;
}

.playground-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #cbd5e1;
    font-size: 1.5rem;
    font-weight: 500;
    pointer-events: none;
    text-align: center;
}

.number-line-floating {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(4px);
    padding: 10px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border: 1px solid var(--bc-border);
    z-index: 1;
}

/* BOTTOM TOOLBAR */
.bc-toolbar {
    height: 60px;
    background-color: var(--bc-toolbar-bg);
    border-top: 1px solid var(--bc-border);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 2rem;
    gap: 2rem;
    z-index: 10;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.tool-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--bc-border);
    background: #ffffff;
    color: var(--bc-text);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.tool-btn:hover {
    background: #f1f5f9;
    color: var(--bc-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.color-picker-wrapper {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    overflow: hidden;
    border: 1px solid var(--bc-border);
    cursor: pointer;
}

.color-picker {
    width: 150%;
    height: 150%;
    border: none;
    transform: translate(-25%, -25%);
    cursor: pointer;
}

/* PANELES FLOTANTES */
.bc-floating-panel {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid var(--bc-border);
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    width: 300px;
    z-index: 50;
    display: flex;
    flex-direction: column;
    transition: opacity 0.2s, transform 0.2s;
}

.bc-floating-panel.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--bc-border);
    background: #f8fafc;
    border-radius: 8px 8px 0 0;
}

.panel-header h3 {
    margin: 0;
    font-size: 0.95rem;
    color: var(--bc-dark);
}

.close-panel {
    background: none;
    border: none;
    color: #94a3b8;
    cursor: pointer;
    font-size: 1rem;
    transition: color 0.1s;
}

.close-panel:hover {
    color: #ef4444;
}

.panel-body {
    padding: 1rem;
    font-size: 0.9rem;
    line-height: 1.5;
}

.panel-body ul {
    margin: 0;
    padding-left: 1.2rem;
}

.panel-body li {
    margin-bottom: 0.5rem;
}

.panel-body span {
    font-weight: 600;
    color: var(--bc-accent);
}

.btn-verify {
    width: 100%;
    padding: 0.5rem;
    margin-top: 1rem;
    background: var(--bc-accent);
    color: white;
    border: none;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-verify:hover {
    background: #0284c7;
}

@media (max-width: 768px) {
    .bc-sidebar {
        width: 80px;
    }
    .generator-item span {
        font-size: 0.8rem;
    }
    .x2-pos { width: 50px !important; height: 50px !important; }
    .number-line-floating canvas {
        width: 100%;
        max-width: 400px;
    }
}