/* ============================================================
   HEADER / NAVIGATION
   ============================================================ */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 26, 20, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: background .3s, border-color .3s;
}

[data-theme="light"] .site-header {
    background: rgba(245, 239, 224, 0.9);
}

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

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
    gap: 24px;
}

/* ---------- Лого ---------- */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-heading);
    flex-shrink: 0;
}
.logo:hover { color: var(--color-accent); }

.logo-mark {
    width: 38px;
    height: 38px;
    flex-shrink: 0;
}
.logo-mark svg { width: 100%; height: 100%; }

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.logo-name {
    font-family: 'Lora', serif;
    font-weight: 700;
    font-size: 1.35rem;
    letter-spacing: -0.01em;
}
.logo-tagline {
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-ochre);
    font-weight: 600;
    margin-top: 2px;
}

/* ---------- Главная навигация ---------- */
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
}

.nav-item { position: relative; }

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 10px 16px;
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
    border-radius: 2px;
    transition: color .2s, background .2s;
    white-space: nowrap;
}
.nav-link:hover {
    color: var(--color-accent);
    background: var(--color-accent-soft);
}
.nav-link.active {
    color: var(--color-accent);
}
.nav-link .chev {
    width: 12px;
    height: 12px;
    transition: transform .2s;
    opacity: 0.6;
}
.nav-item:hover .chev { transform: rotate(180deg); opacity: 1; }

/* ---------- Выпадающее меню ---------- */
.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 280px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    box-shadow: var(--shadow-lg);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, visibility .2s, transform .2s;
    pointer-events: none;
}
.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.dropdown-link {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 2px;
    color: var(--color-text);
    transition: background .15s;
}
.dropdown-link:hover {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}
.dropdown-link .icon {
    width: 20px;
    height: 20px;
    color: var(--color-ochre);
    flex-shrink: 0;
    margin-top: 2px;
}
.dropdown-link .meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.dropdown-link .meta-title {
    font-weight: 600;
    font-size: 0.92rem;
}
.dropdown-link .meta-desc {
    font-size: 0.78rem;
    color: var(--color-text-soft);
    line-height: 1.3;
}

/* ---------- Правая часть шапки ---------- */
.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.icon-btn {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 2px;
    color: var(--color-text);
    transition: background .2s, color .2s;
}
.icon-btn:hover {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}
.icon-btn svg { width: 20px; height: 20px; }

/* Переключатель темы — анимация солнце/луна */
.theme-toggle .sun { display: none; }
[data-theme="light"] .theme-toggle .sun { display: block; }
[data-theme="light"] .theme-toggle .moon { display: none; }

/* ---------- Бургер (мобильное меню) ---------- */
.burger {
    display: none;
    width: 40px;
    height: 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    border-radius: 2px;
    transition: background .2s;
}
.burger:hover { background: var(--color-accent-soft); }
.burger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    transition: all .3s cubic-bezier(.4, 0, .2, 1);
    transform-origin: center;
}
.burger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.burger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Мобильное меню (drawer) ---------- */
.mobile-menu {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--color-bg);
    z-index: 99;
    transform: translateY(-100%);
    transition: transform .35s cubic-bezier(.4, 0, .2, 1);
    overflow-y: auto;
    padding-top: 70px;
}
.mobile-menu.open { transform: translateY(0); }

.mobile-menu-inner {
    padding: 24px 20px 100px;
}

.mobile-nav-section {
    margin-bottom: 28px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--color-border);
}
.mobile-nav-section:last-child {
    border-bottom: none;
}

.mobile-section-title {
    font-family: 'Manrope', sans-serif;
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--color-ochre);
    font-weight: 700;
    margin-bottom: 12px;
    padding: 0 12px;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 12px;
    color: var(--color-text);
    font-size: 1.05rem;
    font-weight: 500;
    border-radius: 4px;
    transition: background .2s;
}
.mobile-nav-link:hover,
.mobile-nav-link:active {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}
.mobile-nav-link .icon {
    width: 22px;
    height: 22px;
    color: var(--color-ochre);
    flex-shrink: 0;
}

.mobile-cta {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}
.mobile-cta .btn { flex: 1; }

/* Запрет скролла body когда меню открыто */
body.menu-open {
    overflow: hidden;
}

/* ---------- Адаптив ---------- */
@media (max-width: 1024px) {
    .main-nav { display: none; }
    .burger { display: inline-flex; }
    .header-inner { padding: 12px 0; }
    .logo-mark { width: 34px; height: 34px; }
    .logo-name { font-size: 1.15rem; }
    .logo-tagline { font-size: 0.65rem; }
}

@media (max-width: 480px) {
    .logo-tagline { display: none; }
    .header-actions .icon-btn:not(.theme-toggle):not(.burger) { display: none; }
}

/* ---------- Языковой переключатель ---------- */
.lang-picker {
    position: relative;
}
.lang-toggle svg { transition: transform .3s; }
.lang-picker:hover .lang-toggle svg,
.lang-picker:focus-within .lang-toggle svg {
    transform: rotate(180deg);
    color: var(--color-accent);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 220px;
    max-height: 360px;
    overflow-y: auto;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-strong);
    border-radius: 4px;
    box-shadow: var(--shadow-lg);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity .2s, transform .2s, visibility .2s;
    z-index: 50;
}
.lang-picker:hover .lang-dropdown,
.lang-picker:focus-within .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 2px;
    color: var(--color-text);
    font-size: 0.95rem;
    transition: background .15s;
}
.lang-option:hover {
    background: var(--color-accent-soft);
    color: var(--color-accent);
}
.lang-option.active {
    background: var(--color-accent-soft);
    color: var(--color-accent);
    font-weight: 600;
}
.lang-option .flag {
    font-size: 1.1rem;
    line-height: 1;
}

@media (max-width: 480px) {
    .lang-picker { display: none; }
}