/* ---------- Header / Navigation ---------- */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(248, 245, 240, 0.85);
    backdrop-filter: blur(16px) saturate(1.2);
    -webkit-backdrop-filter: blur(16px) saturate(1.2);
    border-bottom: 1px solid var(--color-border-light);
}

header nav {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-brand {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: opacity var(--duration-fast) var(--ease-out);
}

.nav-brand:hover {
    opacity: 0.8;
    color: var(--color-text);
}

.nav-brand-icon {
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-on-primary);
    font-size: 0.8rem;
    font-weight: 600;
    transform: rotate(-3deg);
    box-shadow: 0 2px 6px rgba(184, 92, 56, 0.2);
}

.nav-spacer {
    flex: 1;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out);
}

.nav-links a:hover {
    color: var(--color-text);
    background: var(--color-primary-glow);
}

.nav-links a.btn-primary {
    color: var(--color-text-on-primary);
    background: var(--color-primary);
    padding: 0.45rem 1rem;
    font-weight: 600;
}

.nav-links a.btn-primary:hover {
    color: var(--color-text-on-primary);
    background: var(--color-primary-hover);
    box-shadow: 0 2px 8px rgba(184, 92, 56, 0.3);
}

.nav-user {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 400;
}

.nav-separator {
    width: 1px;
    height: 20px;
    background: var(--color-border);
}

.nav-logout-form {
    display: inline;
    margin: 0;
    padding: 0;
}

.nav-logout-btn {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    background: none;
    border: none;
    cursor: pointer;
    transition: color var(--duration-fast) var(--ease-out),
                background var(--duration-fast) var(--ease-out);
}

.nav-logout-btn:hover {
    color: var(--color-text);
    background: var(--color-primary-glow);
}

/* Theme toggle */
.theme-toggle {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    transition: color var(--duration-fast) var(--ease-out);
}

.theme-toggle:hover {
    color: var(--color-primary);
}

/* Mobile hamburger toggle — checkbox hack */
.nav-toggle-input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-xs);
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform var(--duration-normal) var(--ease-out),
                opacity var(--duration-fast) var(--ease-out);
}

/* Show nav links when checkbox is checked */
.nav-toggle-input:checked ~ .nav-links {
    display: flex;
}

/* Hamburger to X animation */
.nav-toggle-input:checked ~ .nav-toggle span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle-input:checked ~ .nav-toggle span:nth-child(2) {
    opacity: 0;
}
.nav-toggle-input:checked ~ .nav-toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Focus visible on label when checkbox is focused */
.nav-toggle-input:focus-visible ~ .nav-toggle {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ---------- Footer ---------- */
footer {
    border-top: 1px solid var(--color-border-light);
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
}

footer p {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    max-width: none;
    font-weight: 400;
    letter-spacing: 0.02em;
}