/* DESIGN SYSTEM AVANÇADO - PLATAFORMA QUÍMICA CIENTÍFICA */
:root {
    --bg-primary: #f4f6f9;
    --bg-secondary: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent-color: #0f766e;
    --accent-hover: #115e59;
    --border-color: #cbd5e1;
    --danger-color: #b91c1c;
    --success-color: #15803d;
    --info-color: #0369a1;
    --grid-element-bg: #e2e8f0;
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #2dd4bf;
    --accent-hover: #14b8a6;
    --border-color: #334155;
    --grid-element-bg: #334155;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    min-height: 100vi;
    transition: background-color 0.3s, color 0.3s;
}

/* HEADER */
.main-header {
    background-color: var(--bg-secondary);
    border-bottom: 2px solid var(--border-color);
    padding: 1rem 2rem;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1600px;
    margin: 0 auto;
}

.main-header h1 {
    font-size: 1.5rem;
    color: var(--accent-color);
}

/* CONTAINER LAYOUT */
.main-layout {
    display: flex;
    flex: 1;
    max-width: 100%;
}

/* SIDEBAR NAVEGAÇÃO */
.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 2px solid var(--border-color);
    padding: 1rem;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    margin-bottom: 0.5rem;
}

.sidebar .nav-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: background 0.2s;
}

.sidebar .nav-link:hover, .sidebar .nav-link.active {
    background-color: var(--accent-color);
    color: #ffffff !important;
}

/* CONTEÚDO PRINCIPAL */
.content-area {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.tab-content {
    display: none;
}

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

/* COMPONENTES CARD */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.25rem;
}

.instruction {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

/* FORMULÁRIOS */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.65rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
}

.form-control:focus {
    outline: 2px solid var(--accent-color);
}

/* BOTÕES */
.btn {
    display: inline-block;
    padding: 0.65rem 1.25rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: opacity 0.2s;
}

.btn-primary { background-color: var(--accent-color); color: white; }
.btn-primary:hover { background-color: var(--accent-hover); }
.btn-secondary { background-color: var(--text-secondary); color: white; }
.btn-danger { background-color: var(--danger-color); color: white; }
.btn-success { background-color: var(--success-color); color: white; }
.btn-info { background-color: var(--info-color); color: white; }

/* TABELA PERIODICA GRID */
.periodic-table-container {
    overflow-x: auto;
    padding: 1rem 0;
}

.periodic-grid {
    display: grid;
    grid-template-columns: repeat(18, minmax(60px, 1fr));
    gap: 4px;
    min-width: 1100px;
}

.element-cell {
    background-color: var(--grid-element-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 6px;
    text-align: center;
    cursor: pointer;
    user-select: none;
    transition: transform 0.1s, box-shadow 0.1s;
}

.element-cell:hover {
    transform: scale(1.08);
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    z-index: 10;
}

.cell-num { font-size: 0.7rem; text-align: left; color: var(--text-secondary); }
.cell-sym { font-size: 1.2rem; font-weight: bold; }
.cell-name { font-size: 0.65rem; text-overflow: ellipsis; overflow: hidden; white-space: nowrap; }

/* CATEGORIAS DOS ELEMENTOS */
.cat-nonmetal { border-left: 4px solid #10b981; }
.cat-noble { border-left: 4px solid #a855f7; }
.cat-alkali { border-left: 4px solid #ef4444; }
.cat-alkaline { border-left: 4px solid #f97316; }
.cat-metalloid { border-left: 4px solid #eab308; }
.cat-halogen { border-left: 4px solid #06b6d4; }
.cat-transition { border-left: 4px solid #3b82f6; }
.cat-lanthanide { border-left: 4px solid #ec4899; }
.cat-actinide { border-left: 4px solid #f43f5e; }
.cat-post-transition { border-left: 4px solid #64748b; }

/* ELEMENT CARD DETALHES */
.element-detail-card {
    border-top: 4px solid var(--accent-color);
}
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
}

/* CAIXAS DE RESULTADOS */
.results-box {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background-color: var(--bg-primary);
    border-left: 4px solid var(--accent-color);
    border-radius: 4px;
}

.hidden { display: none !important; }

/* TABELAS DE DADOS */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.data-table th, .data-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background-color: var(--grid-element-bg);
    font-weight: 600;
}

/* GRIDS FLEXÍVEIS */
.grid-2col { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1rem; }
.grid-3col { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }

/* LOGS TÉCNICOS */
.steps-log, .procedure-log {
    background-color: #0f172a;
    color: #38bdf8;
    padding: 1rem;
    border-radius: 6px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    margin-top: 0.5rem;
    white-space: pre-wrap;
}

/* CONTAINER GRÁFICOS */
.chart-container { position: relative; height: 320px; width: 100%; margin-top: 1rem; }
.chart-container-small { position: relative; height: 240px; width: 100%; max-width: 500px; margin: 1rem auto; }

/* AÇÕES EXPORTAÇÃO */
.export-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.history-table-container {
    overflow-x: auto;
}

/* RODAPÉ */
.main-footer {
    background-color: var(--bg-secondary);
    border-top: 2px solid var(--border-color);
    text-align: center;
    padding: 1.25rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* RESPONSIVIDADE INTERFACES */
@media(max-width: 992px) {
    .main-layout { flex-direction: column; }
    .sidebar { width: 100%; border-right: none; border-bottom: 2px solid var(--border-color); }
}