.main-header{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:var(--spacing-md) var(--spacing-xl);background-color:var(--color-background);position:sticky;top:0;z-index:100}.header-left{display:flex;align-items:center;gap:var(--spacing-sm);justify-self:start}.logo-link{display:inline-flex;align-items:center;text-decoration:none}.logo-text{font-family:var(--font-family-heading);font-weight:900;font-size:1.2rem;color:var(--color-primary)}.header-center{display:flex;justify-content:center;align-items:center}.main-nav{display:flex;justify-content:flex-end;align-items:center;gap:var(--spacing-sm)}.nav-button{padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--radius-full);border:2px solid var(--color-primary);background:none;color:var(--color-primary);font-weight:700;cursor:pointer;transition:var(--transition-fast);text-decoration:none;font-size:1rem;display:inline-flex;align-items:center;justify-content:center}.nav-button:hover{background-color:var(--color-primary);color:#fff}.header-center .nav-button{gap:8px}.nav-button.primary{background-color:var(--color-primary);color:#fff}.nav-button.secondary{border-color:var(--color-text-light);color:var(--color-text-light)}.nav-button.secondary:hover{background-color:var(--color-text-light);color:#fff}.header-back-button{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-white);color:var(--color-text);font-size:.95rem;font-weight:600;text-decoration:none;white-space:nowrap;transition:background-color var(--transition-fast)}.header-back-button:hover{background:var(--color-background)}.header-icon-button{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;padding:0;border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-white);color:var(--color-text-light);cursor:pointer;transition:background-color var(--transition-fast),color var(--transition-fast),border-color var(--transition-fast)}.header-icon-button:hover{background:#fef2f2;border-color:#fecaca;color:#ef4444}.language-switcher{display:inline-flex;align-items:center;gap:4px;padding:2px;border:1px solid var(--color-border);border-radius:var(--radius-full);background:var(--color-white)}.language-switcher__pill{min-width:40px;padding:6px 10px;border:none;border-radius:var(--radius-full);background:transparent;color:var(--color-text-light);font-size:.8125rem;font-weight:700;line-height:1;cursor:pointer;transition:background-color var(--transition-fast),color var(--transition-fast)}.language-switcher__pill:hover{color:var(--color-text)}.language-switcher__pill.is-selected{background:var(--color-primary);color:var(--color-white)}.language-switcher__pill.is-selected:hover{color:var(--color-white)}.main-nav .auth-container__back{margin-bottom:var(--spacing-sm);font-size:var(--font-size-min);color:var(--color-text-light);background:none;border:none;cursor:pointer;font-family:var(--font-family-main)}.main-nav .auth-container__user{font-size:var(--font-size-min);color:var(--color-text)}@media(max-width:600px){.main-header{padding:var(--spacing-sm) var(--spacing-md)}}.app-logo{--app-logo-height: 42px;position:relative;display:block;width:calc(var(--app-logo-height) * 2 / 3);height:var(--app-logo-height);flex-shrink:0;transition:transform var(--transition-fast)}.app-logo__spine{position:absolute;left:0;top:2px;bottom:2px;width:5px;border-radius:2px 0 0 2px;background:linear-gradient(180deg,#1a5bb8 0%,var(--color-primary) 45%,#1a5bb8 100%);box-shadow:inset -1px 0 #ffffff2e}.app-logo__page{position:absolute;inset:0 0 0 4px;border-radius:3px 6px 6px 3px;overflow:hidden;background:linear-gradient(165deg,#8ec5ff,#5a9df0 38%,#f8f4e8 72%,#ffe66d);box-shadow:0 2px 6px #2170dd38,0 1px #ffffff73 inset}.app-logo__sky{position:absolute;inset:0 0 42%;background:linear-gradient(180deg,#7eb8f7,#b8d9fb)}.app-logo__hill{position:absolute;left:-8%;right:-8%;bottom:-4%;height:48%;border-radius:50% 50% 0 0;background:linear-gradient(180deg,#6fcf97,#4ecdc4)}.app-logo__star{position:absolute;top:18%;right:14%;width:7px;height:7px;background:var(--color-accent);clip-path:polygon(50% 0%,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%);box-shadow:0 0 0 1px #ffffff59}.app-logo__line{position:absolute;left:18%;height:2px;border-radius:999px;background:#2c3e5038}.app-logo__line--title{top:58%;width:52%;height:3px;background:#2c3e5057}.app-logo__line:not(.app-logo__line--title):not(.app-logo__line--short){top:70%;width:44%}.app-logo__line--short{top:80%;width:28%}.logo-link:hover .app-logo__page{box-shadow:0 4px 10px #2170dd47,0 1px #ffffff73 inset}.logo-link:hover .app-logo{transform:translateY(-1px)}@media(max-width:600px){.app-logo{--app-logo-height: 36px}}