:root {
    --font-ui: Inter, "Segoe UI", Arial, sans-serif;
    --bg: #edf3ee;
    --surface: #ffffff;
    --surface2: #f6f9f6;
    --border: rgba(255,255,255,0.07);
    --accent: #78be44;
    --accent2: #17764a;
    --accent-glow: rgba(120,190,68,0.18);
    --text: #173a2b;
    --text-muted: #66796c;
    --red: #ff6b6b;
    --yellow: #b68a22;
    --radius: 16px;
    --radius-sm: 10px;
}

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

button, input, select, textarea {
    font: inherit;
}

body {
    font-family: var(--font-ui);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

.header {
    background: linear-gradient(135deg, #0d2235 0%, #edf3ee 100%);
    border-bottom: 1px solid var(--border);
    padding: 1.2rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 14px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    flex-wrap: wrap;
}

.header-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
    box-shadow: 0 0 20px var(--accent-glow);
}

.header-text h1 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.3px;
}

.header-text p {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 1px;
    font-weight: 400;
}

.nav-tabs {
    display: flex;
    gap: 4px;
    background: var(--surface);
    padding: 6px;
    border-radius: var(--radius);
    margin-left: auto;
    flex-wrap: wrap;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-btn.active {
    background: var(--accent-glow);
    color: var(--accent);
}

.nav-btn:hover:not(.active) {
    background: rgba(255,255,255,0.05);
    color: var(--text);
}

.help-btn {
    background: rgba(120,190,68,0.14);
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: 10px;
}

.help-btn:hover {
    background: var(--accent);
    color: var(--bg);
}

.bueiro-nav {
    display: flex;
    gap: 4px;
    background: var(--surface);
    padding: 6px;
    border-radius: var(--radius);
    margin-left: 10px;
}

.bueiro-nav-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.bueiro-nav-btn.active {
    background: var(--accent-glow);
    color: var(--accent);
}

.bueiro-nav-btn:hover:not(.active) {
    background: rgba(255,255,255,0.05);
    color: var(--text);
}

.page {
    display: none;
}

.page.active-page {
    display: block;
}

.app-container {
    min-height: calc(100vh - 67px);
}

.two-col {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 0;
    min-height: calc(100vh - 67px);
}

.sidebar {
    background: var(--surface);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.main {
    overflow-y: auto;
    padding: 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    background: var(--bg);
}

.card {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem;
}

.card-title {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-title::before {
    content: '';
    width: 3px;
    height: 12px;
    background: var(--accent);
    border-radius: 2px;
    display: block;
}

label {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 5px;
}

select, input[type="number"], input[type="text"], textarea {
    width: 100%;
    background: var(--bg);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font-ui);
    font-size: 0.88rem;
    padding: 9px 12px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

textarea {
    resize: vertical;
    font-family: var(--font-ui);
    font-size: 0.75rem;
}

select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237a9bb0' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 12px 8px;
    padding-right: 36px;
    cursor: pointer;
}

select::-ms-expand {
    display: none;
}

select:focus, input:focus, textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-group { margin-bottom: 0.9rem; }
.row-2col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.hint {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
    opacity: 0.8;
}

.calc-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--accent), #00a889);
    border: none;
    border-radius: var(--radius);
    color: #001a14;
    font-family: var(--font-ui);
    font-size: 0.9rem;
    font-weight: 700;
    padding: 13px;
    cursor: pointer;
    transition: all 0.2s;
    letter-spacing: 0.2px;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.calc-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(120,190,68,0.30);
}

.error-msg {
    background: rgba(255,107,107,0.1);
    border: 1px solid rgba(255,107,107,0.3);
    color: var(--red);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    font-size: 0.8rem;
    display: none;
}

.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.result-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem;
}

.result-card.primary {
    grid-column: span 2;
    background: linear-gradient(135deg, #0d2a22 0%, #0b2030 100%);
    border-color: rgba(120,190,68,0.30);
}

.result-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 6px;
}

.result-value {
    font-family: var(--font-ui);
    font-size: 1.7rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: -1px;
    line-height: 1;
}

.result-card.primary .result-value {
    font-size: 2.4rem;
}

.result-unit {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.info-bar {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.8rem 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    font-family: var(--font-ui);
}

.channel-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.channel-btn {
    background: var(--bg);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-size: 0.78rem;
    font-weight: 500;
    padding: 10px 8px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.channel-btn .ch-icon { font-size: 1.1rem; }
.channel-btn:hover { border-color: var(--accent); color: var(--text); }
.channel-btn.active { background: var(--accent-glow); border-color: var(--accent); color: var(--accent); }

.svg-container {
    background: var(--surface2);
    border-radius: 10px;
    padding: 1rem;
    min-height: 250px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.svg-container svg {
    max-width: 100%;
    height: auto;
}

.manning-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin-bottom: 10px;
}

.manning-preset-btn {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.7rem;
    padding: 6px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.manning-preset-btn:hover {
    border-color: var(--accent);
    color: var(--text);
}

.manning-preset-btn.active {
    background: var(--accent-glow);
    border-color: var(--accent);
    color: var(--accent);
}

.runoff-table {
    width: 100%;
    font-size: 0.7rem;
    border-collapse: collapse;
    margin-top: 0.5rem;
}

.runoff-table th,
.runoff-table td {
    border: 1px solid var(--border);
    padding: 6px 8px;
    text-align: left;
    vertical-align: top;
}

.runoff-table th {
    background: var(--bg);
    color: var(--accent);
    font-weight: 600;
}

.runoff-table tr:hover {
    background: rgba(0,201,167,0.05);
}

.runoff-category {
    background: var(--surface);
    font-weight: 600;
    color: var(--yellow);
}

.dnit-table {
    width: 100%;
    font-size: 0.68rem;
    border-collapse: collapse;
    margin: 8px 0;
}

.dnit-table th,
.dnit-table td {
    border: 1px solid var(--border);
    padding: 8px 6px;
    text-align: center;
    vertical-align: middle;
}

.dnit-table th {
    background: var(--bg);
    color: var(--accent);
    font-weight: 600;
}

.dnit-table tr:hover {
    background: rgba(0,201,167,0.05);
}

.dnit-table td:first-child {
    font-weight: 600;
    color: var(--yellow);
}

.table-container {
    overflow-x: auto;
    max-height: 300px;
    overflow-y: auto;
}

.table-hint {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 8px;
    text-align: center;
}

.chart-container {
    background: var(--surface);
    border-radius: var(--radius-sm);
    padding: 1rem;
    margin-top: 0.5rem;
}

.chart-container canvas {
    max-height: 300px;
    width: 100%;
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 12px;
    font-size: 0.7rem;
}

.chart-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.chart-legend-color {
    width: 16px;
    height: 16px;
    border-radius: 3px;
}

.chart-note {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 10px;
    font-style: italic;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 1.5rem;
    position: relative;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-size: 1.2rem;
    color: var(--accent);
}

.close-modal {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0 8px;
}

.close-modal:hover {
    color: var(--red);
}

.equation-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    margin-bottom: 1rem;
}

.equation-card h3 {
    color: var(--accent);
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
    border-left: 3px solid var(--accent);
    padding-left: 8px;
}

.equation-card h4 {
    color: var(--yellow);
    font-size: 0.8rem;
    margin: 10px 0 5px 0;
}

.equation-card .equation {
    font-family: var(--font-ui);
    font-size: 0.8rem;
    background: var(--surface);
    padding: 8px;
    border-radius: 6px;
    margin: 8px 0;
    text-align: center;
    overflow-x: auto;
}

.equation-card .description {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 8px;
    line-height: 1.4;
}

.modal .dnit-table {
    width: 100%;
    font-size: 0.68rem;
    border-collapse: collapse;
    margin: 8px 0;
}

.modal .dnit-table th,
.modal .dnit-table td {
    border: 1px solid var(--border);
    padding: 6px 4px;
    text-align: center;
    vertical-align: middle;
}

.modal .dnit-table th {
    background: var(--surface);
    color: var(--accent);
}

@media (max-width: 768px) {
    .two-col { grid-template-columns: 1fr; }
    .results-grid { grid-template-columns: 1fr; }
    .result-card.primary { grid-column: span 1; }
    .nav-tabs { margin-left: 0; margin-top: 8px; }
    .header { flex-direction: column; align-items: flex-start; }
    .manning-grid { grid-template-columns: repeat(2, 1fr); }
    .runoff-table { font-size: 0.6rem; }
    .runoff-table th, .runoff-table td { padding: 4px 6px; }
}

@keyframes pulse-accent {
    0% { color: var(--accent); }
    50% { color: #fff; }
    100% { color: var(--accent); }
}
.result-value.updated { animation: pulse-accent 0.5s ease; }

/* ========================================================================== */
/* IDENTIDADE VISUAL — RIO PRETO AMBIENTAL E CONSTRUÇÕES                     */
/* ========================================================================== */
:root {
    --bg: #edf3ee;
    --surface: #ffffff;
    --surface2: #f6f9f6;
    --surface3: #e7f0e9;
    --border: rgba(14, 78, 53, 0.14);
    --accent: #78be44;
    --accent-strong: #5d9f2f;
    --accent-dark: #0e4e35;
    --accent2: #17764a;
    --accent-glow: rgba(120, 190, 68, 0.18);
    --text: #173a2b;
    --text-muted: #66796c;
    --red: #c94b4b;
    --yellow: #a67a16;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 12px 30px rgba(14, 78, 53, 0.08);
}

html { scroll-behavior: smooth; }
body.rio-preto-module {
    background:
        radial-gradient(circle at top right, rgba(120,190,68,.10), transparent 32rem),
        var(--bg);
    color: var(--text);
}

.header {
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid var(--border);
    padding: .9rem 1.5rem;
    box-shadow: 0 8px 22px rgba(14,78,53,.06);
    min-height: 84px;
}

.brand-block {
    display: flex;
    align-items: center;
    gap: 18px;
    min-width: 350px;
}
.brand-logo {
    width: 225px;
    max-height: 58px;
    object-fit: contain;
    object-position: left center;
}
.header-text {
    padding-left: 18px;
    border-left: 1px solid var(--border);
}
.header-text h1 {
    color: var(--accent-dark);
    font-size: 1.14rem;
    letter-spacing: -.2px;
}
.header-text p { color: var(--text-muted); font-size: .72rem; }
.module-eyebrow {
    display: block;
    margin-bottom: 2px;
    color: var(--accent-strong);
    font-size: .58rem;
    font-weight: 800;
    letter-spacing: 1.5px;
}

.nav-tabs {
    background: var(--surface2);
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 0 rgba(255,255,255,.8);
}
.nav-btn { color: var(--text-muted); }
.nav-btn.active {
    color: #fff;
    background: linear-gradient(135deg, var(--accent-dark), var(--accent2));
    box-shadow: 0 6px 14px rgba(14,78,53,.18);
}
.nav-btn:hover:not(.active) { background: var(--surface3); color: var(--accent-dark); }
.help-btn {
    color: var(--accent-dark);
    border-color: rgba(14,78,53,.25);
    background: rgba(120,190,68,.12);
}
.help-btn:hover { background: var(--accent-dark); color: #fff; }


.app-container { min-height: auto; }
.two-col {
    grid-template-columns: minmax(310px, 340px) minmax(0, 1fr);
    min-height: auto;
    padding: 1.2rem 1.4rem 1.4rem;
    gap: 1.2rem;
}
.sidebar {
    background: transparent;
    border-right: 0;
    padding: 0;
    overflow: visible;
}
.main {
    background: transparent;
    padding: 0;
    overflow: visible;
}
.card {
    background: rgba(255,255,255,.96);
    border-color: var(--border);
    box-shadow: var(--shadow);
}
.card-title { color: var(--accent-dark); }
.card-title::before { background: linear-gradient(var(--accent), var(--accent-strong)); }

select, input[type="number"], input[type="text"], textarea {
    background-color: #f5f8f5;
    color: var(--text);
    border-color: rgba(14,78,53,.15);
}
select:focus, input:focus, textarea:focus {
    border-color: var(--accent-strong);
    box-shadow: 0 0 0 3px rgba(120,190,68,.16);
    background-color: #fff;
}

.calc-btn {
    color: #fff;
    background: linear-gradient(135deg, var(--accent-dark), var(--accent2));
    box-shadow: 0 8px 20px rgba(14,78,53,.18);
}
.calc-btn:hover { box-shadow: 0 12px 24px rgba(14,78,53,.24); }

.result-card {
    background: #fff;
    box-shadow: var(--shadow);
}
.result-card.primary {
    background: linear-gradient(135deg, #0e4e35 0%, #176e49 100%);
    border-color: transparent;
}
.result-card.primary .result-label,
.result-card.primary .result-unit { color: rgba(255,255,255,.68); }
.result-card.primary .result-value { color: #b9e596; }
.result-value { color: var(--accent-dark); }

.info-bar {
    background: #e6efe8;
    border-color: rgba(14,78,53,.14);
    color: #355c47;
}
.channel-btn, .manning-preset-btn {
    background: #f5f8f5;
    color: var(--text-muted);
}
.channel-btn.active, .manning-preset-btn.active,
.bueiro-nav-btn.active {
    background: var(--accent-dark);
    color: #fff;
    border-color: var(--accent-dark);
}
.channel-btn:hover, .manning-preset-btn:hover { border-color: var(--accent-strong); color: var(--accent-dark); }

.svg-container { background: #f3f7f3; }
.chart-container { background: #f7faf7; }
.runoff-table th, .dnit-table th { background: var(--accent-dark); color: #fff; }
.runoff-table tr:hover, .dnit-table tr:hover { background: rgba(120,190,68,.08); }
.runoff-category { background: #e6efe8; color: var(--accent-dark); }
.dnit-table td:first-child { color: var(--accent-dark); }

.bueiro-nav {
    background: #f5f8f5;
    border: 1px solid var(--border);
}
#page-bueiro > div:first-child {
    margin: 0 1.4rem;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius);
    background: #fff !important;
    box-shadow: var(--shadow);
}

.modal { background: rgba(8,35,24,.78); backdrop-filter: blur(6px); }
.modal-content {
    background: #f7faf7;
    box-shadow: 0 24px 70px rgba(0,0,0,.28);
}
.modal-header h2 { color: var(--accent-dark); }
.equation-card { background: #fff; box-shadow: 0 8px 20px rgba(14,78,53,.06); }
.equation-card h3 { color: var(--accent-dark); border-left-color: var(--accent); }
.equation-card .equation { background: #e9f1eb; color: #234b37; }

.module-footer {
    min-height: 74px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    background: #fff;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: .72rem;
}
.module-footer img { width: 155px; height: 36px; object-fit: contain; }

@media (max-width: 1120px) {
    .header { align-items: flex-start; }
    .nav-tabs { margin-left: 0; width: 100%; }
}
@media (max-width: 768px) {
    .header { padding: .8rem 1rem; }
    .brand-block { min-width: 0; width: 100%; gap: 10px; }
    .brand-logo { width: 165px; }
    .header-text { padding-left: 10px; }
    .header-text h1 { font-size: .95rem; }
    .module-eyebrow { font-size: .5rem; }
    .nav-tabs { display: grid; grid-template-columns: 1fr 1fr; width: 100%; }
    .nav-btn, .help-btn { justify-content: center; margin-left: 0; }
    .two-col { grid-template-columns: 1fr; padding: .8rem; gap: .8rem; }
    #page-bueiro > div:first-child { margin: 0 .8rem; }
    .results-grid { grid-template-columns: 1fr; }
    .result-card.primary { grid-column: span 1; }
    .module-footer { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
    .brand-logo { width: 135px; }
    .header-text p { display: none; }
    .nav-tabs { grid-template-columns: 1fr; }
    .row-2col { grid-template-columns: 1fr; }
}


/* Exportação do relatório hidrológico */
.export-pdf-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .55rem;
}

.export-pdf-btn.is-exporting {
    cursor: wait;
    opacity: .78;
    transform: none;
}

.export-pdf-btn:disabled {
    cursor: not-allowed;
    opacity: .72;
}

.export-hint {
    margin-top: .55rem;
    color: var(--text-muted);
    font-size: .68rem;
    line-height: 1.45;
    text-align: center;
}