:root {
    --primary-green: #0d7c4f;
    --light-green: #2a9d6e;
    --accent-green: #52b788;
    --pale-green: #d8f3dc;
    --dark-green: #081c15;
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --dark-gray: #495057;
    --text-color: #333333;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: var(--primary-green);
    color: var(--white);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
}

nav a:hover,
nav a:focus-visible {
    border-bottom: 2px solid var(--white);
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary-green), var(--light-green));
    color: var(--white);
    padding: 3.5rem 0 3rem;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: flex-start;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.hero p {
    font-size: 1.1rem;
    max-width: 600px;
}

.search-bar {
    width: 100%;
    max-width: 600px;
    position: relative;
    display: flex;
    align-items: center;
}

.search-bar input {
    width: 100%;
    padding: 15px 50px 15px 20px;
    border-radius: 999px;
    border: none;
    font-size: 1rem;
}

.search-bar button {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background-color: var(--primary-green);
    color: var(--white);
    border: none;
    border-radius: 999px;
    padding: 0.5rem 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.search-bar button:hover,
.search-bar button:focus-visible {
    background-color: var(--dark-green);
}

/* Calculator Section */
.calculator-section {
    padding: 4rem 0;
    background-color: var(--light-gray);
}

.section-title {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-title h2 {
    font-size: 2rem;
    color: var(--primary-green);
    margin-bottom: 0.5rem;
}

.section-title p {
    color: var(--dark-gray);
    max-width: 700px;
    margin: 0 auto;
}

.category-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 10px;
}

.category-tab {
    background-color: var(--white);
    border: 2px solid var(--primary-green);
    color: var(--primary-green);
    padding: 0.5rem 1.5rem;
    border-radius: 999px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.category-tab.active,
.category-tab:hover,
.category-tab:focus-visible {
    background-color: var(--primary-green);
    color: var(--white);
}

.category-content {
    display: none;
}

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

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.75rem;
}

.calculator-card {
    background-color: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.calculator-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: var(--primary-green);
    color: var(--white);
    padding: 1rem;
}

.card-header h3 {
    font-size: 1.1rem;
    margin-bottom: 0.35rem;
}

.card-header p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.card-body {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.card-body i {
    font-size: 2rem;
    color: var(--accent-green);
}

.card-body p {
    color: var(--dark-gray);
    flex-grow: 1;
}

.calc-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--primary-green);
    font-weight: 600;
    text-decoration: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.calc-link:hover,
.calc-link:focus-visible {
    color: var(--light-green);
}

.no-results {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

/* Info Sections */
.info-section {
    padding: 4rem 0;
}

.info-section:nth-of-type(even) {
    background-color: var(--light-gray);
}

.info-content {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3rem;
    align-items: center;
}

.info-text h2 {
    font-size: 2rem;
    color: var(--primary-green);
    margin-bottom: 1rem;
}

.info-text p {
    margin-bottom: 1.2rem;
    color: var(--dark-gray);
}

.info-image {
    text-align: center;
}

.info-image i {
    font-size: 5rem;
    color: var(--accent-green);
}

/* FAQ */
.faq-section {
    padding: 4rem 0;
    background-color: var(--light-gray);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--white);
    border-radius: 10px;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1.2rem 1.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
}

.faq-question:hover,
.faq-question:focus-visible {
    background-color: var(--pale-green);
}

.faq-question i {
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 1.5rem 1.2rem;
}

/* Team */
.team-section {
    padding: 4rem 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.75rem;
    margin-top: 2.5rem;
}

.team-member {
    background-color: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    text-align: center;
    padding: 2rem 1rem;
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.member-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background-color: var(--pale-green);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2.2rem;
    color: var(--primary-green);
}

.member-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.member-role {
    color: var(--dark-gray);
    margin-bottom: 0.6rem;
}

.member-bio {
    color: var(--dark-gray);
    font-size: 0.95rem;
}

/* Footer */
footer {
    background-color: var(--dark-green);
    color: var(--white);
    padding: 3rem 0 1.2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-column h3 {
    margin-bottom: 1rem;
    color: var(--accent-green);
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.6rem;
}

.footer-column a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover,
.footer-column a:focus-visible {
    color: var(--accent-green);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    overflow-y: auto;
    padding: 1.5rem;
}

.modal-content {
    background-color: var(--white);
    margin: 3rem auto;
    padding: 2rem;
    border-radius: 10px;
    width: 100%;
    max-width: 640px;
    position: relative;
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.4rem;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--dark-gray);
}

.close-modal:hover,
.close-modal:focus-visible {
    color: var(--primary-green);
}

.calculator-form {
    margin-top: 1.5rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 600;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.7rem;
    border: 1px solid var(--medium-gray);
    border-radius: 5px;
    font-size: 1rem;
}

.form-group input:focus-visible,
.form-group select:focus-visible {
    outline: 2px solid var(--primary-green);
    outline-offset: 2px;
}

.btn {
    background-color: var(--primary-green);
    color: var(--white);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn:hover,
.btn:focus-visible {
    background-color: var(--light-green);
}

.result-box {
    margin-top: 1.6rem;
    padding: 1.4rem;
    background-color: var(--pale-green);
    border-radius: 5px;
}

.result-box h3 {
    color: var(--primary-green);
    margin-bottom: 0.9rem;
}

.result-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.45rem;
    gap: 0.75rem;
}

/* Responsive */
@media (max-width: 992px) {
    .info-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    header {
        position: static;
    }

    .header-container {
        flex-direction: column;
        align-items: flex-start;
    }

    nav ul {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .calculator-grid {
        grid-template-columns: 1fr;
    }

    .team-grid {
        grid-template-columns: 1fr;
    }
}