.arda-header{position:fixed;top:0;left:0;width:100%;height:90px;z-index:1000;display:flex;align-items:center;justify-content:space-between;background:var(--header-bg-gradient);box-shadow:var(--header-box-shadow);border-bottom:2px solid var(--color-primary);padding:var(--header-padding-vertical) var(--header-padding-horizontal);box-sizing:border-box;transition:transform var(--transition-fast),opacity var(--transition-fast)}.arda-header.hidden{transform:translateY(-100%)}body{padding-top:90px}.header-left{display:flex;align-items:center}.logo-link{display:flex;align-items:center;text-decoration:none;height:100%}.arda-logo{width:80px;height:80px;margin:4px;border:2px solid var(--color-primary);border-radius:50%;transition:transform var(--transition-fast)}.arda-title{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:0;font-family:var(--font-family-display);font-size:clamp(1.5rem,3vw,2.25rem);color:var(--color-primary);letter-spacing:var(--header-title-letter-spacing);text-shadow:var(--text-shadow-sm);cursor:pointer;transition:color var(--transition-fast),transform var(--transition-fast);text-decoration:none;margin-left:var(--space-sm);margin-top:4px;line-height:1}.title-line-1,.title-line-2{text-align:left}.header-center{flex:1;display:flex;justify-content:flex-end;align-items:center;position:relative}.nav-links{display:flex;align-items:center;font-family:var(--font-family-display)}.nav-link{position:relative;font-size:var(--nav-link-font-size);font-weight:var(--font-weight-semibold);letter-spacing:var(--letter-spacing-wide);color:var(--color-text-primary);text-decoration:none;padding:var(--header-nav-link-padding-vertical) var(--header-nav-link-padding-horizontal);transition:color .3s ease;display:inline-flex;justify-content:center}.nav-link:after{content:"";position:absolute;bottom:.1em;width:65%;height:2px;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary-hover));border-radius:var(--radius-full);transform:scaleX(0);transition:transform .3s ease-in-out}.nav-link:hover,.nav-link.active{color:var(--color-primary)}.nav-link:hover:after,.nav-link.active:after{transform:scaleX(1)}.store-button{font-family:var(--font-family-display);font-size:var(--font-size-button-md);font-weight:var(--font-weight-bold);letter-spacing:var(--letter-spacing-wide);color:var(--color-text-inverted);background:var(--color-primary);border:2px solid transparent;border-radius:var(--radius-full);white-space:nowrap;cursor:pointer;box-shadow:0 0 8px var(--color-primary);transition:all var(--transition-fast);z-index:100;margin-left:var(--space-sm);padding:var(--space-sm) var(--space-md)}.store-button:hover{background:var(--color-gradient);color:var(--color-primary);border-color:var(--color-primary);transform:scale(1.05)}.menu-toggle{display:none;background:none;border:none;cursor:pointer;z-index:15}.menu-toggle svg{stroke:var(--color-text-primary);width:1.75rem;height:1.75rem;transition:stroke var(--transition-fast),transform var(--transition-fast)}.menu-toggle:hover svg{stroke:var(--color-primary);transform:scale(1.1)}@media(max-width:920px){.menu-toggle{display:block}.nav-links{display:none;flex-direction:column;position:fixed;top:90px;height:calc(100dvh - 90px);width:60vw;background:var(--header-bg-gradient-mobile-nav);border-left:2px solid var(--color-primary);transform:translate(100%);transition:transform var(--transition-fast);z-index:20;gap:0}.nav-links.open{display:flex;transform:translate(0)}.nav-link{text-align:center;font-size:var(--font-size-md);padding:var(--space-sm) 0}.arda-logo{width:var(--logo-size);height:var(--logo-size)}.arda-title{font-size:clamp(1.5rem,3vw,2rem)}}@media(max-width:400px){.arda-header{padding:var(--space-xs) var(--space-sm)}.arda-logo{width:70px;height:70px}.arda-title{font-size:clamp(1.1rem,2.5vw,1.5rem)}.store-button{padding:var(--space-xs) var(--space-sm);font-size:var(--font-size-sm)}}