:root {
    --primary: #005f73;
    --secondary: #0a9396;
    --accent: #ee9b00;
    --light: #e9d8a6;
    --dark: #001219;
    --bg: #f8f9fa;
    /* Ocean Theme Variables */
    --ocean-light: #e0f2f1;
    --ocean-mid: #00897b;
    --ocean-dark: #004d40;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg);
    color: var(--dark);
    line-height: 1.6;
    scroll-behavior: smooth;
}

header {
    background-color: var(--primary);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.logo {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
}

/* Hamburger Menu Icon */
.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: white;
    transition: all 0.3s ease;
}

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

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--light);
}

#home {
    height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: linear-gradient(rgba(0, 95, 115, 0.8), rgba(0, 18, 25, 0.8)), url('https://images.unsplash.com/photo-1507525428034-b723cf961d3e') center/cover;
    color: white;
    padding: 0 20px;
}

#home h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
}

#home p {
    font-size: 1.5rem;
    max-width: 600px;
    margin-bottom: 2rem;
}

.home-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    background-color: var(--accent);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background 0.3s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #ca8400;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
}

.btn-outline:hover {
    background-color: var(--accent);
    color: white;
}

/* Ocean Theme Buttons */
.btn-ocean {
    background-color: var(--ocean-mid);
    color: white;
}

.btn-ocean:hover {
    background-color: var(--ocean-dark);
}

.btn-outline-ocean {
    background-color: transparent;
    border: 2px solid var(--ocean-mid);
    color: var(--ocean-mid);
}

.btn-outline-ocean:hover {
    background-color: var(--ocean-mid);
    color: white;
}

section {
    padding: 5rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

h2.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 3rem;
}

/* Survey Banner */
.coordination-banner {
    background-color: var(--light);
    padding: 3rem;
    border-radius: 10px;
    text-align: center;
    margin-bottom: 4rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.coordination-banner.ocean-theme {
    background-color: var(--ocean-light);
    border: 1px solid #b2dfdb;
}

.coordination-banner p {
    color: var(--dark);
    font-size: 1.2rem;
}

.form-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* Detail Sections (Hiking, Beaches) */
.detail-section {
    background: white;
    border-radius: 10px;
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-top: 4px solid var(--primary);
}
.detail-section.accent { border-top-color: var(--accent); }
.detail-section.secondary { border-top-color: var(--secondary); }
.detail-section h3 {
    color: var(--primary);
    font-size: 1.8rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--light);
    padding-bottom: 0.5rem;
}
.detail-content h4 {
    color: var(--secondary);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}
.detail-content p {
    margin-bottom: 1rem;
    color: #444;
}
.tag {
    display: inline-block;
    background: var(--light);
    color: var(--dark);
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: bold;
    margin-right: 8px;
    margin-bottom: 1rem;
}
.feature-list, .bird-list {
    list-style-type: disc;
    margin-left: 2rem;
    margin-bottom: 1.5rem;
    color: #444;
}

/* Activities Grid */
.activities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.activity-card {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.activity-card:hover {
    transform: translateY(-5px);
}

.activity-card h3 {
    color: var(--secondary);
    margin-bottom: 1rem;
    font-size: 1.4rem;
    border-bottom: 2px solid var(--light);
    padding-bottom: 0.5rem;
}

.activity-card p {
    font-size: 0.95rem;
    color: #555;
}

.activity-meta {
    margin-top: 1rem;
    font-size: 0.85rem;
    font-weight: bold;
    color: var(--primary);
}

.activity-meta a {
    color: var(--secondary);
    text-decoration: none;
    border-bottom: 1px solid var(--secondary);
}

.activity-meta a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.music-list {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: #444;
    padding-left: 1.2rem;
}

/* Misc Utilities */
.schedule-link-banner {
    text-align: center;
    margin: 0 auto 3rem auto;
    padding: 1.5rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-left: 4px solid var(--primary);
    max-width: 800px;
}

.schedule-link-banner a {
    color: var(--primary);
    font-size: 1.2rem;
    font-weight: bold;
    text-decoration: none;
    transition: color 0.3s;
}

.schedule-link-banner a:hover {
    color: var(--accent);
    text-decoration: underline;
}

.alert-banner {
    background-color: var(--light);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: bold;
    color: var(--dark);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.alert-banner a {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 2px solid var(--primary);
    transition: color 0.3s;
}

.alert-banner a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* Schedule Timeline Elements */
.daily-schedule {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}
.day-card {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-top: 4px solid var(--secondary);
}
.day-card h3 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
    border-bottom: 2px solid var(--light);
    padding-bottom: 0.5rem;
}
.activity-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.8rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid #f0f0f0;
    font-size: 0.95rem;
}
.activity-line:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}
.activity-name {
    font-weight: 500;
    color: var(--dark);
}
.activity-time {
    color: var(--secondary);
    font-weight: bold;
    text-align: right;
    max-width: 60%;
}
.highlight-badge {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

/* Rules Grid Elements */
.rules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}
.rule-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-top: 4px solid var(--primary);
}
.rule-card.accent { border-top-color: var(--accent); }
.rule-card h4 {
    color: var(--primary);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.rule-list { list-style-type: none; }
.rule-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
    color: #444;
}
.rule-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

/* Responsive Media Query */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--primary);
        flex-direction: column;
        text-align: center;
        padding: 1rem 0;
        gap: 1.5rem;
        display: none;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }

    .nav-links.active {
        display: flex;
    }

    #home h1 {
        font-size: 2.5rem;
    }
}