/* ==========================================================================
   Header — design tokens
   ========================================================================== */
   :root {
    --header-height: 76px;
    --header-bg: #ffffff;
    --header-border: #eee;
    --header-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    --accent: #c0392b;
    --accent-hover: #a5311f;
    --text: #1a1a1a;
    --text-muted: #666;
    --offcanvas-width: min(320px, 85vw);
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --breakpoint-mobile: 1024px;
}

/* ==========================================================================
   Header container — sticky with shadow-on-scroll
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
    margin-bottom: 2rem;
    background: var(--header-bg);
    border-bottom: 1px solid var(--header-border);
    transition: box-shadow 0.25s var(--ease);
}

.site-header.is-scrolled {
    box-shadow: var(--header-shadow);
}

.site-header__inner {
    display: flex;
    align-items: center;
    height: var(--header-height);
    gap: 24px;
}

/* ==========================================================================
   Branding / logo
   ========================================================================== */
.site-header__branding {
    flex: 0 0 auto;
}

.site-header__logo img {
    display: block;
    height: auto;
    max-height: 48px;
    width: auto;
}

.site-header__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

/* ==========================================================================
   Desktop navigation — centered between logo and CTA
   ========================================================================== */
.site-header__nav {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    min-width: 0;
}

.site-header__menu {
    display: flex;
    align-items: center;
    gap: 35px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-header__menu a {
    position: relative;
    color: var(--text);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 8px 2px;
    transition: color 0.2s var(--ease);
}

.site-header__menu a::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transition: transform 0.25s var(--ease);
}

.site-header__menu a:hover,
.site-header__menu a:focus-visible {
    color: var(--accent);
}

.site-header__menu a:hover::after,
.site-header__menu a:focus-visible::after {
    transform: scaleX(1);
}

/* ==========================================================================
   CTA button
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    text-decoration: none;
    cursor: pointer;
    border: none;
}

.btn--cta {
    background: var(--accent);
    color: #fff;
    font-size: 0.9rem;
    padding: 10px 24px;
    border-radius: 6px;
    transition: background-color 0.2s var(--ease), transform 0.15s var(--ease);
}

.btn--cta:hover,
.btn--cta:focus-visible {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn--block {
    width: 100%;
    box-sizing: border-box;
}

.site-header__cta {
    flex: 0 0 auto;
}

/* ==========================================================================
   Hamburger toggle — hidden on desktop
   ========================================================================== */
.site-header__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
}

.site-header__toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(2) {
    opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   Off-canvas mobile menu — slides in from the right
   ========================================================================== */
.offcanvas {
    position: fixed;
    top: 0;
    right: 0;
    width: var(--offcanvas-width);
    height: 100vh;
    height: 100dvh;
    background: #fff;
    z-index: 200;
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.35s var(--ease);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
}

.offcanvas.is-open {
    transform: translateX(0);
}

.offcanvas__header {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    height: 60px;
    flex: 0 0 auto;
    padding: 0 16px;
    border-bottom: 1px solid var(--header-border);
}

.offcanvas__close {
    background: transparent;
    border: none;
    font-size: 1.8rem;
    line-height: 1;
    color: var(--text);
    cursor: pointer;
    padding: 8px;
}

.offcanvas__body {
    flex: 1 1 auto;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 16px 20px 32px;
}

.offcanvas__menu {
    list-style: none;
    margin: 0 0 24px;
    padding: 0;
}

.offcanvas__menu li {
    border-bottom: 1px solid var(--header-border);
}

.offcanvas__menu a {
    display: block;
    padding: 14px 4px;
    color: var(--text);
    text-decoration: none;
    font-size: 1rem;
}

.offcanvas__menu a:hover,
.offcanvas__menu a:focus-visible {
    color: var(--accent);
}

.offcanvas-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 150;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease);
}

.offcanvas-overlay.is-visible {
    opacity: 1;
    pointer-events: auto;
}

/* body scroll lock while menu is open */
html.has-locked-scroll {
    overflow: hidden;
}

/* ==========================================================================
   Responsive behaviour
   ========================================================================== */
@media (max-width: 1024px) {
    .site-header__nav {
        display: none;
    }

    .site-header__cta {
        display: none;
    }

    .site-header__toggle {
        display: flex;
    }

    .site-header__inner {
        justify-content: space-between;
    }
}

@media (prefers-reduced-motion: reduce) {
    .site-header,
    .offcanvas,
    .offcanvas-overlay,
    .site-header__toggle-bar,
    .btn--cta,
    .site-header__menu a::after {
        transition: none !important;
    }
}