/* Singapore Birds - Modern & Sleek Design */

/* ===== CSS Variables ===== */
:root {
    --primary-color: #2c5f2d;
    --secondary-color: #4a8b4d;
    --accent-color: #97cc04;
    --text-dark: #1a1a1a;
    --text-light: #f5f5f5;
    --background-light: #ffffff;
    --background-alt: #f8f9fa;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background-light);
}

/* ===== Header & Navigation ===== */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-light);
    padding: 1rem 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.site-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.site-title a {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}

.site-title a:hover {
    color: var(--accent-color);
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

nav li {
    display: inline;
}

nav a {
    color: var(--text-light);
    text-decoration: none;
    padding: 0.5rem 1.25rem;
    border-radius: 25px;
    transition: var(--transition);
    font-weight: 500;
    display: inline-block;
    border: 2px solid transparent;
}

nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-color);
}

nav a.active {
    background-color: var(--accent-color);
    color: var(--text-dark);
    font-weight: 600;
}

/* ===== Main Content ===== */
main {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 0 2rem;
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, rgba(44, 95, 45, 0.9), rgba(74, 139, 77, 0.9));
    color: var(--text-light);
    padding: 4rem 2rem;
    border-radius: 15px;
    text-align: center;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-lg);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ===== Bird Cards Grid ===== */
.bird-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.bird-card {
    background: var(--background-light);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid #e0e0e0;
}

.bird-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.bird-card-content {
    padding: 1.5rem;
}

.bird-card h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.bird-card .scientific-name {
    font-style: italic;
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.bird-card p {
    color: var(--text-dark);
    margin-bottom: 1.25rem;
    line-height: 1.7;
}

.bird-card .btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--secondary-color);
    color: var(--text-light);
    text-decoration: none;
    border-radius: 25px;
    transition: var(--transition);
    font-weight: 500;
}

.bird-card .btn:hover {
    background-color: var(--primary-color);
    transform: scale(1.05);
}

/* ===== Bird Detail Page ===== */
.bird-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    padding: 3rem 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
}

.bird-header h1 {
    font-size: 2.75rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.bird-header .scientific-name {
    font-size: 1.25rem;
    font-style: italic;
    opacity: 0.9;
}

.bird-content {
    background: var(--background-light);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.bird-content h2 {
    color: var(--primary-color);
    font-size: 1.75rem;
    margin: 2rem 0 1rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--accent-color);
    font-weight: 600;
}

.bird-content h2:first-child {
    margin-top: 0;
}

.bird-content p {
    margin-bottom: 1.25rem;
    line-height: 1.8;
    color: var(--text-dark);
}

.bird-content ul {
    margin-left: 2rem;
    margin-bottom: 1.25rem;
}

.bird-content li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

/* ===== Bird Images ===== */
.bird-image-container {
    text-align: center;
    margin: 0 0 2rem 0;
}

.bird-image {
    max-width: 100%;
    height: auto;
    max-height: 500px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    object-fit: cover;
}

@media (max-width: 768px) {
    .bird-image {
        max-height: 400px;
    }
}

@media (max-width: 480px) {
    .bird-image {
        max-height: 300px;
    }
}

/* ===== Info Box ===== */
.info-box {
    background: var(--background-alt);
    padding: 1.5rem;
    border-left: 4px solid var(--accent-color);
    margin: 2rem 0;
    border-radius: 8px;
}

.info-box h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.info-box p {
    margin-bottom: 0.75rem;
}

/* ===== Footer ===== */
footer {
    background: var(--text-dark);
    color: var(--text-light);
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}

footer p {
    margin-bottom: 0.5rem;
}

footer a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
}

footer a:hover {
    color: var(--text-light);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .header-container {
        padding: 0 1rem;
    }

    .site-title {
        font-size: 1.5rem;
    }

    nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }

    nav a {
        display: block;
        text-align: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .bird-header h1 {
        font-size: 2rem;
    }

    .bird-content {
        padding: 1.5rem;
    }

    main {
        margin: 2rem auto;
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 1.25rem;
    }

    .hero {
        padding: 2rem 1rem;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .bird-grid {
        gap: 1.5rem;
    }
}