@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&family=Lato:wght@400;700&display=swap');

:root {
    --primary-color: #004d40; /* Dark Teal */
    --secondary-color: #00796b; /* Teal */
    --accent-color: #4db6ac; /* Light Teal */
    --highlight-color: #ffb300; /* A warm amber for results */
    --background-color: #f4f7f9; /* A very light cool gray */
    --card-background: #ffffff;
    --text-color: #37474f; /* Dark gray-blue for text */
    --heading-color: #263238; /* A darker gray-blue for headings */
    --light-text: #ffffff;
    --border-radius: 12px;
    --shadow: 0 5px 15px rgba(0, 77, 64, 0.07);
    --light-shadow: 0 2px 8px rgba(0, 77, 64, 0.05);
    --border-color: #e0e0e0;
    --warning-bg: #fff8e1;
    --warning-text: #6d4c41;
    --warning-border: #ffecb3;
}

/* --- Banner Styles --- */
.info-banner {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    background-color: var(--warning-bg);
    color: var(--warning-text);
    padding: 1.5rem;
    border-left: 5px solid var(--warning-border);
    border-radius: var(--border-radius);
    margin-bottom: 2.5rem;
    box-shadow: var(--light-shadow);
}

.info-banner.hidden {
    display: none;
}

.info-banner .banner-icon {
    font-size: 2rem;
    margin-top: 0.2rem;
    color: #ffc107;
}

.info-banner .banner-text p {
    margin: 0;
    line-height: 1.6;
}

.info-banner .banner-text p:not(:last-child) {
    margin-bottom: 0.75rem;
}

/* --- Portal Styles --- */
#landing-page {
    text-align: center;
}

#portal-intro {
    background: transparent;
    border: none;
    box-shadow: none;
    padding-top: 0;
    padding-bottom: 1.5rem;
}

#portal-intro h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--heading-color);
}

#portal-intro p {
    max-width: 700px;
    margin: 0 auto 3rem auto;
    font-size: 1.1rem;
    color: var(--text-color);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 2rem;
}

.card-grid .card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    height: 280px;
    text-align: center;
    padding: 2rem;
}

.card.air-category-card, 
#show-wastewater-tool.card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    height: 280px;
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    text-align: center;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.card.air-category-card:hover, 
#show-wastewater-tool.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0, 77, 64, 0.12);
    border-color: var(--secondary-color);
}

.card .card-icon {
    font-size: 3rem;
    line-height: 1;
    margin-bottom: 1.5rem;
    color: var(--light-text);
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0, 121, 107, 0.3);
}

.card h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.25rem;
    font-family: 'Poppins', sans-serif;
    color: var(--heading-color);
    padding-bottom: 0;
    border-bottom: none;
    font-weight: 600;
}

.card p {
    font-size: 0.95rem;
    color: var(--text-color);
    line-height: 1.5;
}

.card-grid .card h3,
.card-grid .card p { text-align: center; }
.card-grid .card h3 { margin-bottom: 0.4rem; }
.card-grid .card p { margin-top: 0; }

.portal-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.tool-container.hidden {
    display: none;
}

.back-button {
    background: #0ea5e9; /* bright blue */
    color: #ffffff;
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 9999px;
    box-shadow: 0 6px 18px rgba(14, 165, 233, 0.25);
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 100;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease-in-out;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

#back-to-portal.back-button {
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

a.back-button {
    text-decoration: none;
}

a#back-to-portal.back-button {
    display: inline-flex;
}

.back-button:hover {
    background-color: #0284c7; /* darker blue on hover */
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(2, 132, 199, 0.35);
}

#air-emissions-calculator-container .back-button {
    color: var(--secondary-color);
    border-color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

#air-emissions-calculator-container .back-button:hover {
    background-color: var(--secondary-color);
    color: var(--light-text);
}

#air-calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

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

body {
    font-family: 'Lato', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

header {
    background: var(--primary-color);
    color: var(--light-text);
    padding: 1.5rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-bottom: 4px solid var(--accent-color);
    position: relative;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.logo {
    height: 50px;
    width: 50px;
}

h1 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 1.8rem;
}

main {
    padding: 3rem 2.5rem;
    max-width: 1400px;
    margin: 0 auto;
}

#wastewater-tool .card {
    padding: 2rem;
    margin-bottom: 2rem;
}

#wastewater-tool #country-selector-card p {
    font-size: 1rem;
}

#wastewater-tool #calculator-container {
    gap: 2rem;
}

#wastewater-tool h2 {
    font-size: 1.4rem;
    margin-bottom: 1.2rem;
    padding-bottom: 0.6rem;
}

#wastewater-tool .data-grid, #wastewater-tool .results-grid {
    gap: 1rem;
}

#wastewater-tool .data-item, #wastewater-tool .result-item {
    padding: 0.8rem;
}

#wastewater-tool .data-item label, #wastewater-tool .result-item label {
    font-size: 0.85rem;
}

#wastewater-tool .data-item span, #wastewater-tool .result-item span {
    font-size: 1.4rem;
}

#wastewater-tool .input-group {
    margin-bottom: 1.2rem;
}

#wastewater-tool .input-group.input-row {
    margin-bottom: 0.8rem;
}

#wastewater-tool .input-group label {
    font-size: 0.9rem;
}

#wastewater-tool input[type="number"], #wastewater-tool input[type="range"], #wastewater-tool input[type="text"] {
    padding: 0.6rem;
    font-size: 0.9rem;
}

.card {
    background-color: var(--card-background);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 2.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

#country-selector-card {
    text-align: center;
}

#country-selector-card p {
    max-width: 600px;
    margin: 0 auto 1.5rem;
    color: #555;
    font-size: 1.1rem;
}

.country-select-wrapper {
    position: relative;
    max-width: 500px;
    margin: 1rem auto 0;
}

#country-search {
    width: 100%;
    padding: 0.8rem 1rem 0.8rem 3rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    font-size: 1rem;
    background-color: #fff;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%239e9e9e" class="bi bi-search" viewBox="0 0 16 16"><path d="M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z"/></svg>');
    background-repeat: no-repeat;
    background-position: 1rem center;
    box-shadow: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#country-search:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 103, 120, 0.2);
}

#country-select {
    width: 100%;
    padding: 0.8rem 1rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    font-size: 1rem;
    margin-top: 1rem;
    background-color: #fff;
    box-shadow: none;
    -webkit-appearance: none;
    appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg fill="%23333" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>');
    background-repeat: no-repeat;
    background-position: right 0.7rem top 50%;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#country-select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 103, 120, 0.2);
}

#country-select.hidden {
    display: none;
}

#country-select[size] {
    height: auto;
    background-image: none;
    padding: 0;
}

#country-select[size] option {
    padding: 0.5rem 1rem;
    cursor: pointer;
}

#country-select[size] option:hover {
    background-color: var(--accent-color);
    color: white;
}

#country-select[size] option:checked {
    background-color: var(--secondary-color);
    color: white;
}

#cap-country-search {
    width: 100%;
    padding: 0.8rem 1rem 0.8rem 3rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    font-size: 1rem;
    background-color: #fff;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%239e9e9e" class="bi bi-search" viewBox="0 0 16 16"><path d="M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z"/></svg>');
    background-repeat: no-repeat;
    background-position: 1rem center;
    box-shadow: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#cap-country-search:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 103, 120, 0.2);
}

#calculator-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 2.5rem;
}

#reference-data .card,
#interactive-calculator .card {
    border-top: 4px solid var(--accent-color);
}

#reference-data, #interactive-calculator {
    display: flex;
    flex-direction: column;
}

h2 {
    font-family: 'Poppins', sans-serif;
    color: var(--heading-color);
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.75rem;
    font-size: 1.6rem;
    font-weight: 600;
}

.button-container {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1.5rem;
}

.reset-button {
    background-color: var(--secondary-color);
    color: var(--light-text);
    border: none;
    padding: 0.7rem 1.2rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 700;
    transition: all 0.2s ease-in-out;
    box-shadow: var(--light-shadow);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

.reset-button:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

h3 {
    font-family: 'Poppins', sans-serif;
    color: var(--heading-color);
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.data-grid, .results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.25rem;
    margin-top: 1rem;
}

.data-item.data-item-header {
    background: transparent;
    padding: 0.5rem 0 0 0;
    border: none;
    text-align: left;
    box-shadow: none;
}

.data-item.data-item-header:hover {
    transform: none;
    box-shadow: none;
    border: none;
}

.data-item.data-item-header h3 {
    margin-top: 0;
    margin-bottom: 0;
    width: 100%;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.25rem;
}

.data-item, .result-item {
    background: #fdfdfe;
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.data-item:hover, .result-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--light-shadow);
    border-color: var(--accent-color);
}

.data-item label, .result-item label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5em;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: #555;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-item span {
    font-family: 'Poppins', sans-serif;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--secondary-color);
    display: block;
}

.result-item span {
    font-family: 'Poppins', sans-serif;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--highlight-color);
    display: block;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group.input-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.input-group.input-row label {
    flex-shrink: 0;
    margin-bottom: 0;
    width: 250px;
    justify-content: flex-start;
    font-weight: 600;
}

.input-group.input-row input {
    width: 200px;
}

.input-group label {
    display: flex;
    align-items: center;
    gap: 0.5em;
    margin-bottom: 0.5rem;
    font-weight: 700;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
}

input[type="number"], input[type="range"], input[type="text"] {
    width: 100%;
    padding: 0.7rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    font-size: 1rem;
    font-family: 'Lato', sans-serif;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="number"]:focus, input[type="range"]:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 103, 120, 0.2);
}

input[type="range"] {
    padding: 0;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
}

input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    cursor: pointer;
    background: var(--border-color);
    border-radius: 4px;
    transition: background 0.2s;
}

input[type="range"]:hover::-webkit-slider-runnable-track {
    background: var(--accent-color);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 22px;
    width: 22px;
    border-radius: 50%;
    background: var(--secondary-color);
    cursor: pointer;
    margin-top: -7px; /* You need to specify a margin in Chrome, but in Firefox and IE it is automatic */
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: background 0.2s;
}

input[type="range"]:focus::-webkit-slider-thumb {
    background: var(--primary-color);
}

.min-max-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.min-max-inputs input {
    text-align: center;
}

.full-width {
    grid-column: 1 / -1;
}

.hidden {
    display: none;
}

.icon {
    color: var(--accent-color);
    font-size: 1.2em;
    margin-right: 0.2em;
}

.results-header h3 {
    border-bottom: none;
    margin-bottom: 0;
}

.note-box {
    display: flex;
    align-items: flex-start;
    gap: 0.9rem;
    margin: 1.5rem 0 0 0;
    padding: 1rem 1.25rem;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: var(--light-shadow);
}

.note-box .note-icon {
    font-size: 1.2rem;
    line-height: 1;
}

.note-box .note-title {
    font-weight: 700;
    color: var(--heading-color);
    margin-bottom: 0.35rem;
}

.note-box p {
    margin: 0;
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.6;
}

footer {
    text-align: center;
    padding: 2rem;
    margin-top: 2rem;
    background: #e9ecef;
    color: #6c757d;
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

#notice-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.notice-content {
    background: white;
    padding: 30px 40px;
    border-radius: 12px;
    max-width: 550px;
    text-align: left;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.notice-content h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 10px;
    font-size: 1.5rem;
    text-align: center;
}

.notice-content p {
    font-size: 1rem;
    color: var(--text-color);
    margin-bottom: 20px;
    line-height: 1.6;
}

.notice-content .button-container {
    display: flex;
    justify-content: center;
    margin-top: 25px;
    margin-bottom: 0;
}

.notice-content button {
    padding: 12px 25px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background-color 0.2s ease, transform 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.notice-content button:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

.notice-content strong {
    font-weight: bold;
    color: var(--heading-color);
}

@media (max-width: 900px) {
    #calculator-container, #air-calculator-grid {
        grid-template-columns: 1fr;
    }
     main {
        padding: 1.5rem;
    }
    .card {
        padding: 1.5rem;
    }
    h1 {
        font-size: 1.4rem;
    }
    header {
        padding: 1rem 1.5rem;
        flex-direction: row;
        justify-content: space-between;
    }
    .header-content {
        gap: 1rem;
    }

    .back-button {
        padding: 0.45rem 0.8rem;
        font-size: 0.85rem;
        top: 0.6rem;
        right: 0.6rem;
    }
}