:root {
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --primary: #0284c7;
    --primary-hover: #0369a1;
    --btn-table-bg: #e0f2fe;
    --btn-table-text: #0369a1;
    --btn-table-border: #bae6fd;
    --input-bg: #ffffff;
    --subbox-bg: #f1f5f9;
}

body.dark {
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --primary: #38bdf8;
    --primary-hover: #0284c7;
    --btn-table-bg: #0369a1;
    --btn-table-text: #e0f2fe;
    --btn-table-border: #0284c7;
    --input-bg: #0f172a;
    --subbox-bg: #0f172a;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-user-drag: none;
}

input, select, textarea {
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

body {
    background-color: var(--bg);
    color: var(--text);
    padding: 20px 10px;
    display: flex;
    justify-content: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.app {
    width: 100%;
    max-width: 900px;
}

.topo {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}

.eyebrow {
    font-size: 11px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.topo h1 {
    font-size: 22px;
    font-weight: 700;
}

.topo p {
    font-size: 14px;
    color: var(--text-muted);
}

.tema-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.tema-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
}

.tema {
    background: none;
    border: 1px solid var(--border);
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
}

.aviso {
    background-color: #fef3c7;
    border: 1px solid #fde047;
    color: #854d0e;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 24px;
    line-height: 1.4;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.card-title {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.card-title span {
    background-color: var(--primary);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    flex-shrink: 0;
}

.card-title h2 {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    position: relative;
}

.card-title p {
    font-size: 13px;
    color: var(--text-muted);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

.grid-eletrico {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
}

.grid-eletrico label {
    flex: 1;
    min-width: 0;
    font-size: 11px;
    white-space: nowrap;
}

.grid-eletrico input, 
.grid-eletrico select {
    padding: 6px 6px;
    font-size: 12px;
}

@media (max-width: 768px) {
    .grid-eletrico {
        flex-wrap: wrap;
    }
    .grid-eletrico label {
        min-width: 130px;
    }
}

label {
    display: flex;
    flex-direction: column;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    gap: 6px;
}

input, select {
    background-color: var(--input-bg);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 8px 10px;
    border-radius: 6px;
    font-size: 13px;
    outline: none;
    width: 100%;
}

input.error, select.error {
    border-color: #ef4444;
}

.subbox {
    background-color: var(--subbox-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    margin-top: 16px;
}

.subbox h3 {
    font-size: 13px;
    margin-bottom: 12px;
}

.waiting {
    font-size: 13px;
    color: var(--text-muted);
    font-style: italic;
    padding: 10px 0;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.result-box {
    background-color: var(--subbox-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
}

.result-box h3 {
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 6px;
}

.kv {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    font-size: 12px;
    margin-bottom: 8px;
}

.kv span {
    color: var(--text-muted);
    display: flex;
    align-items: center;
}

.kv strong {
    text-align: right;
}

.sub-info {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    font-weight: normal;
    margin-top: 2px;
}

.table-access {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.table-access p {
    font-size: 11px;
    color: var(--text-muted);
}

.btn-table {
    background-color: var(--btn-table-bg);
    color: var(--btn-table-text);
    border: 1px solid var(--btn-table-border);
    padding: 9px 14px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    align-self: flex-start;
    transition: all 0.2s ease;
}

.btn-table:hover {
    filter: brightness(0.95);
    box-shadow: 0 2px 4px rgba(0,0,0,0.08);
}

.calculate-wrap {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    margin-bottom: 40px;
    align-items: center;
}

.btn-calc {
    flex: 2;
    background-color: #16a34a;
    color: white;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
}

.btn-calc:hover {
    background-color: #15803d;
}

.btn-reset {
    flex: 1;
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 14px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
}

.btn-reset:hover {
    background-color: var(--subbox-bg);
    color: var(--text);
}

.btn-print {
    flex: 1;
    background-color: var(--subbox-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 14px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
}

.btn-voltar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 14px 18px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 13px;
    transition: all 0.2s ease;
}

.btn-voltar:hover {
    background-color: var(--subbox-bg);
    color: var(--text);
}

footer {
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.hidden {
    display: none !important;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal.open {
    display: flex;
}

.modal-box {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    max-width: 600px;
    width: 100%;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
}

.modal-box.wide {
    max-width: 800px;
}

.modal-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-muted);
}

.table-scroll {
    overflow-y: auto;
    margin: 12px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

th, td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

th {
    background-color: var(--subbox-bg);
    position: sticky;
    top: 0;
}

.note {
    font-size: 11px;
    color: var(--text-muted);
}