header {
    background: var(--structure);
    border-bottom: 1px solid rgba(255, 251, 247, 0.16);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: var(--shadow);
}
.container {
    width: min(1080px, 90vw);
    margin: 0 auto;
}
.container-fluid {
    width: min(1200px, 94vw);
    margin: 0 auto;
}
.top-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0;
    gap: 1rem;
}
.brand {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.brand a {
    color: var(--on-accent);
    font-size: 1.5rem;
    font-weight: 700;
}
.brand span {
    font-size: 0.9rem;
    color: rgba(255, 251, 247, 0.72);
}
.menu-toggle {
    display: none;
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 0.75rem;
    padding: 0.45rem;
    cursor: pointer;
    color: var(--text);
    transition: border 0.2s ease, box-shadow 0.2s ease;
}
.menu-toggle svg {
    width: 1.35rem;
    height: 1.35rem;
}
.menu-toggle:hover,
.menu-toggle:focus {
    border-color: var(--accent);
    box-shadow: 0 14px 24px -18px rgba(52, 74, 65, 0.36);
}
.header-search {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    border: 1px solid var(--border);
    border-radius: 0.85rem;
    padding: 0.35rem 0.5rem 0.35rem 0.75rem;
    background: var(--surface);
    box-shadow: var(--shadow);
    flex: 1 1 280px;
    max-width: 380px;
}
.header-search input {
    flex: 1;
    border: none;
    font-size: 0.95rem;
    color: var(--text);
}
.header-search input::placeholder {
    color: var(--muted);
    opacity: 0.7;
}
.header-search input:focus {
    outline: none;
}
.header-search button {
    border: none;
    background: transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem;
    border-radius: 0.6rem;
    color: var(--muted);
    cursor: pointer;
}
.header-search button:hover,
.header-search button:focus {
    color: var(--link);
}
.header-search svg {
    width: 1.1rem;
    height: 1.1rem;
}
nav ul {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
    font-weight: 500;
}
nav a {
    color: var(--on-accent);
    transition: color 0.2s ease;
}
nav a:hover,
nav a:focus {
    color: #f7c59d;
}
.primary-nav {
    display: flex;
    align-items: center;
    margin-left: auto;
}
.primary-nav ul {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
    font-weight: 500;
}
.primary-nav a {
    color: var(--on-accent);
    transition: color 0.2s ease;
}
.primary-nav a:hover,
.primary-nav a:focus {
    color: #f7c59d;
}
footer {
    background: var(--structure);
    color: var(--on-accent);
    padding: 2.5rem 0;
    margin-top: 4rem;
}
footer nav {
    margin-bottom: 1rem;
}
footer nav ul {
    justify-content: center;
    gap: 1.5rem;
}
footer nav a {
    color: var(--on-accent);
    font-weight: 500;
}
footer nav a:hover,
footer nav a:focus {
    color: var(--accent-light);
}
footer p {
    text-align: center;
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.95rem;
    margin: 0.75rem 0 0;
}
.back-to-top {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: none;
    display: none;
    align-items: center;
    justify-content: center;
    background: var(--accent-dark);
    color: #fff;
    cursor: pointer;
    box-shadow: 0 22px 40px -22px rgba(52, 74, 65, 0.34);
    font-size: 1.35rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    z-index: 50;
}

.back-to-top.visible {
    display: flex;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 26px 52px -26px rgba(52, 74, 65, 0.36);
}