/* 1. Basic website settings */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, sans-serif;
    color: #243247;
    background-color: #ffffff;
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1150px;
    margin: auto;
}


/* 2. Navigation bar */

.navbar {
    background-color: #10243a;
    padding: 20px 0;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.logo {
    color: white;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
}

.logo span {
    color: #49cf91;
}

nav {
    display: flex;
    gap: 25px;
}

nav a {
    color: #ffffff;
    text-decoration: none;
    font-size: 14px;
}

nav a:hover {
    color: #49cf91;
}


/* 3. Hero section */

.hero {
    background: linear-gradient(120deg, #10243a, #174c53);
    color: white;
    padding: 100px 0;
}

.hero-content {
    max-width: 1150px;
}

.tagline {
    color: #49cf91;
    font-size: 13px;
    font-weight: bold;
    letter-spacing: 2px;
    margin-bottom: 18px;
}

.hero h1 {
    font-size: 52px;
    line-height: 1.2;
    max-width: 700px;
    margin-bottom: 20px;
}

.hero h1 span {
    color: #49cf91;
}

.hero-description {
    color: #d5e2e7;
    font-size: 17px;
    max-width: 600px;
    margin-bottom: 30px;
}

.primary-button {
    display: inline-block;
    background-color: #49cf91;
    color: #10243a;
    padding: 13px 24px;
    border-radius: 6px;
    font-weight: bold;
    text-decoration: none;
}

.primary-button:hover {
    background-color: #ffffff;
}


/* 4. Calculator section */

.tools-section {
    padding: 80px 0;
    background-color: #f5f8fa;
}

.section-heading {
    text-align: center;
    margin-bottom: 45px;
}

.section-label {
    color: #16875b;
    font-size: 13px;
    font-weight: bold;
    letter-spacing: 2px;
}

.section-heading h2 {
    font-size: 32px;
    color: #10243a;
    margin: 10px 0;
}

.section-heading p {
    color: #64748b;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}

.tool-card {
    background-color: white;
    padding: 28px 22px;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
    transition: 0.3s;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

.tool-icon {
    font-size: 32px;
    margin-bottom: 15px;
}

.tool-card h3 {
    color: #10243a;
    margin-bottom: 10px;
}

.tool-card p {
    color: #64748b;
    font-size: 14px;
    margin-bottom: 20px;
}

.tool-card a {
    color: #16875b;
    font-weight: bold;
    font-size: 14px;
    text-decoration: none;
}


/* 5. Resources section */

.resources-section {
    padding: 80px 0;
}

.resource-box {
    background-color: #eaf5ef;
    padding: 40px;
    border-radius: 12px;
    text-align: center;
}

.resource-box h3 {
    color: #10243a;
    font-size: 24px;
    margin-bottom: 12px;
}

.resource-box p {
    color: #526477;
    max-width: 650px;
    margin: 0 auto 20px;
}

.resource-box a {
    color: #16875b;
    font-weight: bold;
    text-decoration: none;
}


/* 6. About section */

.about-section {
    background-color: #f5f8fa;
    padding: 65px 0;
    text-align: center;
}

.about-section h2 {
    color: #10243a;
    margin-bottom: 15px;
}

.about-section p {
    max-width: 750px;
    margin: auto;
    color: #64748b;
}


/* 7. Footer */

.footer {
    background-color: #10243a;
    color: white;
    text-align: center;
    padding: 35px 0;
}

.footer p {
    color: #b8c8d3;
    margin-top: 8px;
}

.copyright {
    font-size: 12px;
    margin-top: 25px !important;
}


/* 8. Mobile responsive design */

@media (max-width: 850px) {

    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero h1 {
        font-size: 40px;
    }

}

@media (max-width: 600px) {

    .nav-content {
        flex-direction: column;
    }

    nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .hero {
        padding: 65px 0;
    }

    .hero h1 {
        font-size: 34px;
    }

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

    .section-heading h2 {
        font-size: 26px;
    }

    .resource-box {
        padding: 25px 18px;
    }

}

/* Solar PR Calculator */

/* Calculator dashboard layout */

#tools {
    padding: 50px 5%;
}

#tools .calculator-box {
    background: white;
    width: 100%;
    max-width: none;
    min-width: 0;
    margin: 0;
    padding: 24px;
    box-sizing: border-box;
    border-radius: 12px;
    border: 1px solid #dce5e9;
    box-shadow: 0 8px 25px rgba(0,0,0,0.05);
}

#tools {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
}

.calculator-box h3 {
    color: #10243a;
    font-size: 25px;
    margin-bottom: 8px;
}

.calculator-intro {
    color: #64748b;
    margin-bottom: 25px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-weight: bold;
    margin-bottom: 8px;
    color: #243247;
}

.input-group input {
    width: 100%;
    padding: 13px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 16px;
}

.input-group input:focus {
    outline: 2px solid #49cf91;
    border-color: #16875b;
}

.calculate-button {
    width: 100%;
    padding: 14px;
    background: #16875b;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
}

.calculate-button:hover {
    background: #10243a;
}

.result-box {
    margin-top: 25px;
    padding: 20px;
    border-radius: 8px;
    background: #eaf5ef;
    text-align: center;
    color: #10243a;
}

.result-box h4 {
    font-size: 16px;
    margin-bottom: 8px;
}

.result-box .pr-value {
    font-size: 36px;
    font-weight: bold;
    color: #16875b;
}

.result-box p {
    font-size: 14px;
}
/* Calculator section improvements */

.calculator-box {
    scroll-margin-top: 30px;
}

.calculator-box h3 {
    border-bottom: 2px solid #eaf5ef;
    padding-bottom: 12px;
}

.calculator-box input {
    box-sizing: border-box;
}

.calculator-box input:focus {
    outline: 2px solid #49cf91;
    border-color: #16875b;
}

@media (max-width: 600px) {

    .calculator-box {
        padding: 22px;
        margin-left: 10px;
        margin-right: 10px;
    }

    .calculator-box h3 {
        font-size: 21px;
    }

    .result-box .pr-value {
        font-size: 30px;
    }
}
/* Tablet layout */

@media (max-width: 1000px) {
    #tools {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Mobile layout */

@media (max-width: 650px) {
    #tools {
        grid-template-columns: 1fr;
    }

    #tools .calculator-box {
        padding: 20px;
    }
}
/* Solar Calculator Dashboard */

#tools {
    display: block;
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    width: 100%;
    align-items: start;
}

.calculator-grid .calculator-box {
    width: 100%;
    max-width: none;
    min-width: 0;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

/* Tablet */

@media (max-width: 1000px) {
    .calculator-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Mobile */

@media (max-width: 650px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
}