/* ===========================
   Nature Soham Colour Scheme
   =========================== */

:root {
    --forest-green: #2A4D2E;
    --moss-green: #6B8F5E;
    --earth-brown: #8C6A4A;
    --gold-accent: #D9A441;
    --sky-grey: #F5F7F8;
    --text-dark: #222;
}

/* ===========================
   Global Page Layout
   =========================== */

body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--sky-grey);
    color: var(--text-dark);

    display: flex;
    flex-direction: column;
    align-items: center;     /* centre everything */
    text-align: center;      /* centre text inside elements */
}

/* ===========================
   Header + Logo
   =========================== */

.site-header {
    background: var(--forest-green);
    padding: 1rem;
    width: 100%;
    text-align: center;
}

.site-logo {
    height: 120px;
    width: auto;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.site-logo:hover {
    transform: scale(1.05);
}

/* ===========================
   Navigation Bar
   =========================== */

.main-nav {
    width: 100%;
    background: var(--moss-green);
    padding: 0.8rem 0;
    display: flex;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 1.5rem;
}

.main-nav li {
    margin: 0;
    padding: 0;
}

.main-nav a {
    background: var(--forest-green);
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: bold;
    transition: background 0.2s ease, transform 0.15s ease;
    display: inline-block;
}

.main-nav a:hover {
    background: var(--gold-accent);
    color: var(--forest-green);
    transform: scale(1.05);
}

/* ===========================
   Main Content Area
   =========================== */

main {
    max-width: 900px;
    margin: 2rem auto;
    padding: 1rem;
}

/* ===========================
   Buttons (future use)
   =========================== */

button {
    background: var(--moss-green);
    color: white;
    border: none;
    padding: 0.7rem 1.2rem;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s ease;
}

button:hover {
    background: var(--forest-green);
}

/* ===========================
   Table Styling (for sightings page)
   =========================== */

table {
    border-collapse: collapse;
    margin: 2rem auto;
    width: 90%;
    max-width: 900px;
}

th {
    background: var(--forest-green);
    color: white;
    padding: 0.8rem;
}

td {
    padding: 0.6rem;
    border-bottom: 1px solid var(--earth-brown);
}

tr:nth-child(even) {
    background: var(--moss-green);
    color: white;
}

tr:nth-child(odd) {
    background: white;
}