:root {
    --primary: #2b6cb0;
    --secondary: #c3f0ca;
    --bg: #f7fafc;
    --card-bg: #fff;
    --accent: #22527a;
    --shadow: 0 2px 12px #cbd5e133;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--bg);
    color: #222;
    font-family: 'Roboto', sans-serif;
}

header {
    background: transparent;
    background-color: var(--primary);
    position: fixed;
    top: 0;
    width: 100%;
    padding: .3rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}

header h1 {
    font-size: 1.7rem;
    padding: 0 5rem;
    color: var(--card-bg);
}

header nav {
    margin-top: 0.2em;
    margin-left: .5em;
    padding: 0 5rem;
}

header nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 1em;
    font-weight: 500;
    letter-spacing: 1px;
    padding: 0.5em 0.7em;
    border-radius: 5px;
    transition: background 0.2s;
}

header nav a:hover, header nav a.active {
    background: var(--secondary);
    color: var(--primary);
}

main {
    margin: 100px auto 1.5em auto;
    padding: 0 1.2em;
}

section {
    background: var(--card-bg);
    margin-bottom: 2em;
    padding: 2.4em 1.5em;
    border-radius: 18px;
    box-shadow: var(--shadow);
    height: 100vh;
}

/* home */ 
.home-section {
    text-align: center;
    color: #fff;
    box-shadow: 0 4px 18px #2b6cb040;
    background: url('img/1.png');
    background-repeat: no-repeat;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;

}
.home-section .content{
    max-width: 80%;
    margin: auto;
    padding: auto;

}

.home-section .content h2 {
    margin-top: 10%;
    font-size: 2.2em;
    color: var(--card-bg);

}
.home-section .content p{
    line-height: 1.7;
    font-size: 1rem;
}

/* about */ 
.about-section {
    margin-top: 1.5em;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.about-section .content{
    max-width: 50%;
}
.about-section .content h2{
    color: var(--primary);
    font-size: 2.2em;
    margin-bottom: .5em;

}
.about-section .content p{
    line-height: 1;
    font-size: 1rem;

}
.about-section .img img{
    border-radius: 18px;

}

/* volunteer */ 
.volunteer-section h2{
    color: var(--primary);
    font-size: 2.2em;
    margin-bottom: .5em;
    text-align: center;
    margin-bottom: 5rem;
}
.volunteer-section form {
    display: flex;
    flex-direction: column;
    max-width: 400px;
    margin: 0 auto;
    gap: 0.3em;
    position: relative;
}

.volunteer-section label {
    margin-top: 0.8em;
    margin-bottom: 0.2em;
    font-weight: 500;
}

.volunteer-section input, 
.volunteer-section textarea {
    font-size: 1em;
    padding: 0.6em;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    margin-bottom: 0.3em;
    transition: border-color 0.2s;
    resize: none;
}

.volunteer-section button {
    margin-top: 1.2em;
    padding: 0.8em;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1.07em;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 1px 4px #2b6cb022;
    transition: background 0.2s;
}

.volunteer-section button:hover {
    background: var(--accent);
}

footer {
    background: #e2e8f0;
    color: #555;
    text-align: center;
    padding: 1em 0;
    font-size: 0.95em;
    margin-top: 2em;
    border-radius: 8px 8px 0 0;
    box-shadow: 0 -1px 8px #cbd5e133;
}