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

body {
    font-family: Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at 10% 10%, #dce8d2 0, transparent 28%),
        radial-gradient(circle at 90% 20%, #e7efd9 0, transparent 30%),
        linear-gradient(135deg, #f7f5e9, #eef3e5);
    color: #304638;
    min-height: 100vh;
    overflow-x: hidden;
}

.background-leaf {
    position: fixed;
    opacity: 0.18;
    pointer-events: none;
    z-index: 0;
}

.leaf-one {
    top: 90px;
    left: 15px;
    font-size: 90px;
    transform: rotate(-20deg);
}

.leaf-two {
    right: 15px;
    bottom: 80px;
    font-size: 100px;
    transform: rotate(20deg);
}

header {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 35px 20px 20px;
}

.logo {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #315744;
}

header p {
    margin-top: 7px;
    color: #71806e;
    font-size: 14px;
}

main {
    width: min(1050px, 92%);
    margin: auto;
    position: relative;
    z-index: 2;
}

.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    padding: 60px 20px 50px;
}

.tag {
    display: inline-block;
    padding: 7px 13px;
    border-radius: 30px;
    background: #dce8d2;
    color: #47684f;
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 2px;
}

.hero h1 {
    font-family: Georgia, serif;
    font-size: clamp(42px, 7vw, 72px);
    line-height: 1;
    margin: 18px 0;
    color: #294536;
    max-width: 650px;
}

.hero p {
    max-width: 570px;
    color: #68786a;
    font-size: 17px;
    line-height: 1.7;
}

.circle {
    width: 190px;
    height: 190px;
    min-width: 190px;
    border-radius: 50%;
    background: #dce8d2;
    border: 2px solid #a7bb9d;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.circle::before {
    content: "";
    position: absolute;
    width: 120px;
    height: 120px;
    border: 2px dashed #78936f;
    border-radius: 50%;
}

.circle span {
    font-family: Georgia, serif;
    font-size: 65px;
    font-style: italic;
    color: #46684e;
}

.calculator {
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid #d5dfcf;
    border-radius: 28px;
    padding: 38px;
    box-shadow: 0 18px 50px rgba(54, 76, 58, 0.09);
    backdrop-filter: blur(8px);
}

.calculator h2 {
    text-align: center;
    font-family: Georgia, serif;
    font-size: 32px;
    color: #304e3a;
}

.subtitle {
    text-align: center;
    color: #7b877a;
    margin: 8px 0 28px;
}

.input-area {
    max-width: 600px;
    margin: auto;
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-area input {
    flex: 1;
    min-width: 0;
    padding: 16px 18px;
    border: 1px solid #c8d5c3;
    border-radius: 14px;
    background: #fbfcf7;
    font-size: 17px;
    color: #304638;
    outline: none;
}

.input-area input:focus {
    border-color: #6f906e;
    box-shadow: 0 0 0 3px #dce8d2;
}

.degree {
    font-size: 20px;
    color: #506b54;
}

button {
    border: none;
    padding: 16px 22px;
    border-radius: 14px;
    background: #47694f;
    color: white;
    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s ease;
}

button:hover {
    background: #36553e;
    transform: translateY(-1px);
}

#errorMessage {
    min-height: 22px;
    text-align: center;
    color: #b14e4e;
    margin-top: 14px;
}

.results {
    margin-top: 20px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

.result-card {
    background: #f4f7ef;
    border: 1px solid #dce5d7;
    border-radius: 18px;
    padding: 23px 15px;
    text-align: center;
}

.result-card span {
    display: block;
    color: #71806e;
    font-size: 15px;
    margin-bottom: 10px;
}

.result-card strong {
    font-family: Georgia, serif;
    font-size: 23px;
    color: #315744;
    overflow-wrap: anywhere;
}

.info {
    margin: 55px 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.info-card {
    padding: 25px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.65);
    border: 1px solid #dce5d7;
}

.info-card span {
    color: #81977b;
    font-size: 12px;
    font-weight: bold;
}

.info-card h3 {
    margin: 10px 0;
    color: #365740;
    font-family: Georgia, serif;
    font-size: 22px;
}

.info-card p {
    color: #748074;
    font-size: 14px;
    line-height: 1.5;
}

footer {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 25px;
    color: #7b877a;
    font-size: 13px;
}

@media (max-width: 750px) {

    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 35px;
    }

    .hero p {
        margin: auto;
    }

    .circle {
        width: 145px;
        height: 145px;
        min-width: 145px;
    }

    .circle::before {
        width: 95px;
        height: 95px;
    }

    .circle span {
        font-size: 50px;
    }

    .calculator {
        padding: 25px 18px;
    }

    .input-area {
        flex-wrap: wrap;
    }

    .input-area input {
        width: 100%;
        flex-basis: 100%;
    }

    .input-area button {
        flex: 1;
    }

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

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

@media (max-width: 420px) {

    .hero h1 {
        font-size: 43px;
    }

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