:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #2563eb;
    --accent-light: #eff6ff;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --success: #16a34a;
    --success-light: #f0fdf4;
    --danger: #dc2626;
    --danger-light: #fef2f2;
    --text-main: #334155;
    --text-muted: #64748b;
    --border: #e2e8f0;
}

body { 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; 
    background-color: var(--bg); 
    padding: 24px 16px; 
    margin: 0; 
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
}

/* Container que gerencia a largura máxima da página */
.container { 
    max-width: 1100px; 
    margin: auto; 
}

header {
    text-align: center;
    margin-bottom: 24px;
}

header h1 {
    font-size: 26px;
    color: var(--primary);
    margin: 0 0 6px 0;
    font-weight: 700;
}

header p {
    font-size: 15px;
    color: var(--text-muted);
    margin: 0;
}

/* O SEGREDO DA RESPONSIVIDADE: 
   Por padrão (celular), organiza em uma única coluna. 
   Quando a tela for grande (PC/Tablet), muda dinamicamente via Media Queries no fim do arquivo */
.app-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.card { 
    background: var(--card-bg); 
    padding: 20px; 
    border-radius: 16px; 
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.03); 
    border: 1px solid var(--border);
    height: fit-content;
}

h2 { 
    color: var(--primary); 
    margin-top: 0; 
    font-size: 16px; 
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

h2::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 16px;
    background: var(--accent);
    border-radius: 4px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.form-group { 
    margin-bottom: 14px; 
}

.form-group.full-width {
    grid-column: span 2;
}

label { 
    display: block; 
    font-size: 11px; 
    font-weight: 600; 
    color: var(--text-muted); 
    margin-bottom: 6px; 
    text-transform: uppercase; 
    letter-spacing: 0.5px;
}

input, select { 
    width: 100%; 
    padding: 12px; 
    border: 1px solid var(--border); 
    border-radius: 10px; 
    box-sizing: border-box; 
    font-size: 15px; 
    color: var(--text-main);
    background-color: #fafafa;
    transition: all 0.2s ease;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--accent);
    background-color: #fff;
    box-shadow: 0 0 0 3px rgba(37, 99, 233, 0.1);
}

.form-row {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    margin-bottom: 12px;
}

.btn-add {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0 20px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    height: 45px;
    transition: background 0.2s;
}

.btn-add:hover { background-color: var(--primary-light); }
.btn-add:active { transform: scale(0.98); }

.lista-itens {
    list-style: none;
    padding: 0;
    margin: 12px 0 16px 0;
    max-height: 150px;
    overflow-y: auto;
    border-radius: 10px;
    background: #f8fafc;
    border: 1px solid var(--border);
}

.lista-itens li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}

.lista-itens li:last-child { border-bottom: none; }

.btn-remove {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 18px;
    padding: 4px;
}

.row { 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    padding: 10px 0; 
    border-bottom: 1px solid #f1f5f9; 
}

.row:last-child { border-bottom: none; }

.val { 
    font-weight: 500; 
    font-size: 14px;
    color: var(--text-main); 
}

.qtd-input { 
    width: 80px; 
    text-align: center; 
    padding: 8px;
    font-size: 14px;
}

.subtotal { 
    width: 100px; 
    text-align: right; 
    font-weight: 600; 
    font-size: 14px;
    color: var(--text-muted); 
}

.total-box { 
    padding: 14px; 
    border-radius: 12px; 
    text-align: center; 
    margin-top: 14px; 
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.bg-secondary { 
    background-color: #f1f5f9; 
    color: var(--text-muted);
}

.bg-primary { 
    background-color: var(--primary); 
    color: #94a3b8;
}

.total-val { 
    font-size: 22px; 
    font-weight: 700; 
    display: block; 
    margin-top: 4px; 
    color: var(--primary); 
}

.bg-primary .total-val { color: #ffffff; }

/* Destaque para o valor final de depósito */
.bg-deposit {
    background-color: var(--success-light);
    border: 1px dashed var(--success);
    color: var(--success);
}
.bg-deposit .total-val { color: var(--success); }

.status-alerta {
    margin-top: 16px;
    padding: 14px;
    border-radius: 12px;
    text-align: center;
    font-weight: 600;
    font-size: 14px;
    line-height: 1.4;
}

.alert-info { background-color: #f1f5f9; color: var(--text-muted); }
.alert-success { background-color: var(--success-light); color: var(--success); border: 1px solid rgba(22, 163, 74, 0.2); }
.alert-danger { background-color: var(--danger-light); color: var(--danger); border: 1px solid rgba(220, 38, 38, 0.2); }

.btn-submit { 
    width: 100%; 
    background: var(--accent); 
    color: white; 
    border: none; 
    padding: 14px; 
    font-size: 16px; 
    font-weight: 600; 
    border-radius: 12px; 
    cursor: pointer; 
    margin-top: 16px; 
    box-shadow: 0 4px 12px rgba(37, 99, 233, 0.2);
}

.btn-submit:active { transform: scale(0.99); }

/* ==========================================================================
   MEDIA QUERIES (A MÁGICA DA RESPONSIVIDADE PARA TABLETS E COMPUTADORES)
   ========================================================================== */

/* Para Tablets (Telas a partir de 600px de largura) */
@media (min-width: 600px) {
    .app-grid {
        grid-template-columns: repeat(2, 1fr); /* Divide em 2 colunas */
    }
    .full-row-tablet {
        grid-column: span 2; /* Cartões de fechamento ou identificação ocupam a largura total */
    }
}

/* Para Computadores/Desktops (Telas a partir de 950px de largura) */
@media (min-width: 950px) {
    .app-grid {
        grid-template-columns: repeat(3, 1fr); /* Divide perfeitamente em 3 colunas lado a lado */
    }
    .full-row-tablet {
        grid-column: span 3; /* No PC, o fechamento cruza a tela toda por baixo */
    }
    header h1 { font-size: 32px; }
}