/* ─── HEADER ─── */
.site-header{position:sticky;top:0;z-index:500;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color var(--t-med),box-shadow var(--t-med)}
[data-theme="dark"] .site-header{background:rgba(15,23,42,.92)}
.site-header.scrolled{border-bottom-color:var(--c-border);box-shadow:0 1px 12px rgb(0 0 0/.07)}
[data-theme="dark"] .site-header.scrolled{box-shadow:0 1px 12px rgb(0 0 0/.3)}

.hdr-inner{display:flex;align-items:center;justify-content:space-between;height:62px;gap:1rem}

/* Logo */
.logo{display:flex;align-items:center;gap:.625rem;flex-shrink:0;text-decoration:none}
.logo-icon{flex-shrink:0}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-brand{font-family:var(--f-disp);font-size:1.0625rem;font-weight:800;color:var(--c-primary);letter-spacing:-.02em}
.logo-sub{font-size:.625rem;font-weight:600;color:var(--c-text2);letter-spacing:.04em;text-transform:uppercase}

/* Desktop nav */
.nav-list{display:none;align-items:center;gap:.125rem}
@media(min-width:1024px){.nav-list{display:flex}}
.nav-item{position:relative}
.nav-btn,.nav-link{display:flex;align-items:center;gap:3px;padding:.5rem .75rem;font-size:.875rem;font-weight:500;color:var(--c-text2);border-radius:var(--r-md);transition:color var(--t-fast),background var(--t-fast);background:none;border:none;cursor:pointer;font-family:var(--f-sans);text-decoration:none}
.nav-btn:hover,.nav-link:hover{color:var(--c-text);background:var(--c-bg3)}
.nav-chevron{transition:transform var(--t-med)}
.nav-item:hover .nav-chevron{transform:rotate(180deg)}

/* Dropdown */
.dropdown{position:absolute;top:calc(100% + 6px);left:0;min-width:210px;background:var(--c-bg);border:1px solid var(--c-border);border-radius:var(--r-lg);box-shadow:var(--sh-lg);padding:.3rem;display:none;animation:fadeUp .15s ease;z-index:200}
.dropdown::before{content:'';position:absolute;top:-10px;left:0;right:0;height:10px}
.has-drop:hover .dropdown{display:block}
[data-theme="dark"] .dropdown{background:var(--c-bg2)}
.drop-link{display:block;padding:.5rem .875rem;font-size:.875rem;font-weight:500;color:var(--c-text2);border-radius:var(--r-md);transition:color var(--t-fast),background var(--t-fast);text-decoration:none}
.drop-link:hover{color:var(--c-primary);background:var(--c-primary-bg)}

/* Header actions */
.hdr-actions{display:flex;align-items:center;gap:.5rem}
.theme-btn,.menu-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--r-md);color:var(--c-text2);background:none;border:1.5px solid var(--c-border);cursor:pointer;transition:all var(--t-fast);flex-shrink:0}
.theme-btn:hover,.menu-btn:hover{color:var(--c-primary);border-color:var(--c-primary);background:var(--c-primary-bg)}
.icon-moon{display:none}
[data-theme="dark"] .icon-sun{display:none}
[data-theme="dark"] .icon-moon{display:block}
.menu-btn{display:flex}
@media(min-width:1024px){.menu-btn{display:none}}

/* Hamburger */
.hamburger{display:flex;flex-direction:column;gap:4px;width:16px}
.hamburger span{display:block;width:100%;height:1.5px;background:var(--c-text);border-radius:2px;transition:all var(--t-med)}
.hamburger.open span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0;transform:scaleX(0)}
.hamburger.open span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* Mobile menu */
.mobile-menu{position:fixed;inset:0;top:62px;background:var(--c-bg);z-index:400;transform:translateX(100%);transition:transform .3s cubic-bezier(.32,0,.67,0);overflow-y:auto}
.mobile-menu.open{transform:translateX(0);transition-timing-function:cubic-bezier(.33,1,.68,1)}
@media(min-width:1024px){.mobile-menu{display:none!important}}
.mob-inner{padding:1.5rem 1.25rem}
.mob-sec{margin-bottom:.5rem}
.mob-sec-label{display:block;font-size:.6875rem;font-weight:800;text-transform:uppercase;letter-spacing:.1em;color:var(--c-text3);padding:.5rem .75rem}
.mob-link{display:block;padding:.625rem .875rem;font-size:.9375rem;font-weight:500;color:var(--c-text2);border-radius:var(--r-md);transition:all var(--t-fast);text-decoration:none}
.mob-link:hover,.mob-link:focus{color:var(--c-primary);background:var(--c-primary-bg)}
.mob-divider{height:1px;background:var(--c-border);margin:.75rem 0}