/* ---------- Color palette ---------- */
:root {
    --navy: #001D3D;
    --royal: #003566;
    --grey: #E8E0DE;
    --yellow: #FFC300;
}

/* ---------- Element selectors ---------- */
* {
    box-sizing: border-box;
}

html,
body {
    overflow-x: hidden;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--grey);
    color: var(--navy);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

h1,
h2 {
    font-weight: 700;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

img {
    max-width: 100%;
    height: auto;
}

/* ---------- Header ---------- */
.site-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    min-height: 140px;
    padding: 1rem;
    background-color: var(--navy);
    color: var(--grey);
    text-align: center;
}

.site-header img {
    width: 80px;
    flex-shrink: 0;
}

.site-header h1 {
    margin: 0;
    font-size: 2.5rem;
    color: var(--yellow);
    letter-spacing: 1px;
}

.tagline {
    margin: 0;
    font-style: italic;
}

@media (max-width: 575px) {
    .site-header img {
        width: 56px;
    }

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

/* ---------- Navigation ---------- */
.site-nav {
    background-color: var(--royal);
    padding: 0.5rem 1rem;
}

.site-nav .nav-link {
    color: var(--grey);
    font-weight: 500;
    border-radius: 999px;
    transition: background-color 0.2s, color 0.2s;
}

.site-nav .nav-link:hover,
.site-nav .nav-link:focus {
    background-color: var(--navy);
    color: var(--yellow);
}

.site-nav .nav-link.active {
    background-color: var(--yellow);
    color: var(--navy);
}

/* ---------- Main layout (grid) ---------- */
main {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding-top: 2rem;
    padding-bottom: 2rem;
}

@media (min-width: 768px) {
    main {
        grid-template-columns: 1fr 1fr;
    }

    #welcome {
        grid-column: 1 / -1;
    }
}

/* ---------- ID selectors ---------- */
#welcome {
    background-color: var(--navy);
    color: var(--grey);
    padding: 2rem;
    border-radius: 1rem;
    border-left: 8px solid var(--yellow);
}

#welcome h2 {
    color: var(--yellow);
}

#welcome p:last-child {
    margin-bottom: 0;
    font-weight: 600;
}

#current-username {
    font-weight: 600;
    color: var(--royal);
}

/* ---------- Form cards ---------- */
.card-panel {
    background-color: #ffffff;
    padding: 2rem;
    border-radius: 1rem;
    border-top: 6px solid var(--royal);
    box-shadow: 0 4px 12px rgba(0, 29, 61, 0.15);
    min-width: 0;
}

.card-panel form {
    display: flex;
    flex-direction: column;
}

.card-panel .form-label {
    font-weight: 500;
    margin-top: 0.75rem;
}

.card-panel .form-control:focus {
    border-color: var(--royal);
    box-shadow: 0 0 0 0.2rem rgba(0, 53, 102, 0.25);
}

.card-panel .form-control::placeholder {
    color: #6E7CA0;
}

.login-status {
    margin-top: 1.25rem;
    margin-bottom: 0;
    font-size: 0.9rem;
}

/* ---------- Buttons ---------- */
.btn-cougar {
    margin-top: 1.5rem;
    background-color: var(--royal);
    color: #ffffff;
    font-weight: 600;
    border: none;
    padding: 0.6rem;
    transition: background-color 0.2s, color 0.2s;
}

.btn-cougar:hover,
.btn-cougar:focus {
    background-color: var(--yellow);
    color: var(--navy);
}

/* ---------- Footer ---------- */
.site-footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background-color: var(--navy);
    color: var(--grey);
    font-size: 0.9rem;
}

.site-footer p {
    margin: 0;
}

.site-footer a {
    color: var(--yellow);
    text-decoration: none;
}

.site-footer a:hover {
    text-decoration: underline;
}