/* Design 4 – nature inspired with soft blues and whites */

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

body {
    font-family: 'Inter', sans-serif;
    background: #f0faff;
    color: #0a263d;
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
.header {
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #0a263d;
}

.nav a {
    margin-left: 1rem;
    color: #3e6e8c;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav a:hover,
.nav a.active {
    color: #0a263d;
}

/* Hero section */
.hero {
    position: relative;
    height: 60vh;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nature-hero {
    background-image: url('images/winter_bg.png');
}

.hero-overlay {
    background: rgba(10, 38, 61, 0.55);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    color: #ffffff;
}

.hero-overlay h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-overlay p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    color: #e2e8f0;
}

.hero-form {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.hero-form input {
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 4px 0 0 4px;
    font-size: 1rem;
    width: 200px;
    color: #0a263d;
}

.hero-form button {
    padding: 0.75rem 1rem;
    border: none;
    background: #38bdf8;
    color: #0a263d;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    transition: background 0.2s;
}

.hero-form button:hover {
    background: #0ea5e9;
}

/* Features */
.nature-features {
    padding: 4rem 0;
    background: #f0faff;
}

.nature-features h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #0a263d;
}

.feature-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
}

.feature-item {
    flex: 1 1 300px;
    padding: 1.5rem;
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    text-align: center;
}

.nature-box h4 {
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #0a263d;
    font-size: 1.25rem;
}

.nature-box p {
    color: #3e6e8c;
}

/* Calculator nature section */
.nature-form-section {
    padding: 3rem 0;
    background: #f0faff;
    color: #0a263d;
}

.nature-form-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: #0a263d;
}

.nature-form-section p {
    text-align: center;
    margin-bottom: 2rem;
    color: #3e6e8c;
}

.nature-form {
    max-width: 500px;
    margin: 0 auto;
    background: #ffffff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.nature-form .form-group {
    margin-bottom: 1rem;
}

.nature-form .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #0a263d;
}

.nature-form .form-group input,
.nature-form .form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 4px;
    font-size: 1rem;
    color: #0a263d;
    background: #f8fafc;
}

.nature-form button {
    display: block;
    width: 100%;
    padding: 0.75rem;
    background: #38bdf8;
    color: #0a263d;
    font-size: 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 1rem;
    font-weight: 600;
}

.nature-form button:hover {
    background: #0ea5e9;
}

/* Results nature styles */
.results-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #0a263d;
}

.result-box {
    max-width: 400px;
    margin: 0 auto;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    font-size: 1.125rem;
}

.result-box p {
    margin-bottom: 1rem;
    color: #0a263d;
}

.nature-btn {
    display: inline-block;
    margin-top: 1.5rem;
    background: #38bdf8;
    color: #0a263d;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.2s;
}

.nature-btn:hover {
    background: #0ea5e9;
}

/* Footer */
.footer {
    background: #ffffff;
    border-top: 1px solid #e2e8f0;
    padding: 1rem 0;
    text-align: center;
    color: #3e6e8c;
    font-size: 0.875rem;
}