.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: linear-gradient(180deg, rgba(10, 10, 10, 0.98) 0%, rgba(10, 10, 10, 0.9) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: var(--z-docked);
    display: flex;
    align-items: center;
    transition: background var(--transition-base);
    will-change: transform;
}

.header.scrolled {
    background: rgba(10, 10, 10, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.header__container {
    max-width: var(--container-max-width);
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--content-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-2xl);
    height: 100%;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.header__logo:hover {
    opacity: 0.85;
}

.logo-icon {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
    transition: filter var(--transition-base);
}

.logo-text {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #fff 60%, rgba(255,255,255,0.7));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header__nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    flex: 1;
    padding: 0 var(--spacing-2xl);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
    padding: var(--spacing-xs) 0;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.nav-link:hover {
    color: var(--color-text-primary);
}

.nav-link.active {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-semibold);
}

.nav-link.premium-badge {
    background: linear-gradient(135deg, var(--color-accent-purple), var(--color-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: var(--font-weight-bold);
}

.header__actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex-shrink: 0;
}

.hamburger-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.04);
    display: none;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.hamburger-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-text-primary);
}

.hamburger-btn svg {
    width: 20px;
    height: 20px;
}

.notification-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    position: relative;
    flex-shrink: 0;
}

.notification-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-text-primary);
}

.notification-btn svg {
    width: 20px;
    height: 20px;
}

.notification-dot {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 2px solid var(--color-dark);
    animation: pulse-dot 2s infinite;
}

.search-btn-mobile {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.04);
    display: none;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.search-btn-mobile:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-text-primary);
}

.search-btn-mobile svg {
    width: 20px;
    height: 20px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-full);
    padding: var(--spacing-sm) var(--spacing-xl);
    transition: all var(--transition-base);
    min-width: 180px;
}

.search-box:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.14);
}

.search-box:focus-within {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 0 3px rgba(229, 9, 20, 0.08);
}

.search-input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
    padding: 0;
    margin: 0;
    width: 100%;
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-icon {
    color: var(--color-text-muted);
    flex-shrink: 0;
    margin-left: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.search-box:focus-within .search-icon {
    color: var(--color-text-primary);
}

.search-box.expanded {
    min-width: 280px;
}

.profile-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent-purple), var(--color-primary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.profile-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 0 20px rgba(229, 9, 20, 0.3);
}

.profile-btn:active {
    transform: scale(0.96);
}

.profile-icon {
    width: 18px;
    height: 18px;
}

.profile-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    background: rgba(20, 20, 20, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    padding: var(--spacing-sm);
    min-width: 220px;
    z-index: var(--z-dropdown);
    display: none;
    box-shadow: var(--shadow-xl);
    animation: fadeInScale var(--transition-base) both;
    transform-origin: top right;
}

.profile-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
}

.profile-menu-item:hover {
    background: rgba(229, 9, 20, 0.08);
    color: var(--color-text-primary);
}

.profile-menu-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.6;
}

.profile-menu-item:hover svg {
    opacity: 1;
}

.profile-menu-separator {
    height: 1px;
    background: rgba(255, 255, 255, 0.06);
    margin: var(--spacing-xs) var(--spacing-sm);
}

.main-content {
    padding-top: var(--header-height);
    padding-bottom: var(--spacing-5xl);
}

@media (max-width: 1024px) {
    .header__container { gap: var(--spacing-lg); padding: 0 var(--spacing-lg); }
    .header__nav { gap: var(--spacing-md); padding: 0 var(--spacing-lg); }
    .nav-link { font-size: var(--font-size-xs); }
    .search-box { min-width: 140px; }
    .search-box.expanded { min-width: 200px; }
}

@media (max-width: 768px) {
    .header__nav { display: none; }
    .hamburger-btn { display: flex; }
    .notification-btn { display: flex; }
    .search-btn-mobile { display: flex; }
    .logo-text { font-size: var(--font-size-lg); }
    .logo-icon { width: 24px; height: 24px; }
    .search-box { display: none; }
    .header__actions { gap: var(--spacing-sm); }
    .profile-btn { width: 32px; height: 32px; }
    .hamburger-btn { width: 32px; height: 32px; }
    .notification-btn { width: 32px; height: 32px; }
    .search-btn-mobile { width: 32px; height: 32px; }
}

@media (max-width: 480px) {
    .header__container { padding: 0 var(--spacing-md); }
    .logo-text { font-size: var(--font-size-base); }
    .profile-btn { width: 30px; height: 30px; }
    .profile-icon { width: 16px; height: 16px; }
    .hamburger-btn { width: 30px; height: 30px; }
    .notification-btn { width: 30px; height: 30px; }
    .search-btn-mobile { width: 30px; height: 30px; }
    .notification-dot { top: 4px; right: 4px; width: 6px; height: 6px; }
}

@media (prefers-color-scheme: light) {
    .header {
        background: linear-gradient(180deg, rgba(250, 250, 250, 0.98) 0%, rgba(250, 250, 250, 0.9) 100%);
    }
    .header.scrolled {
        background: rgba(250, 250, 250, 0.98);
        box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    }
    .logo-text {
        background: linear-gradient(135deg, #1a1a1a 60%, rgba(26, 26, 26, 0.7));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .profile-menu {
        background: rgba(250, 250, 250, 0.98);
        border-color: rgba(0, 0, 0, 0.08);
    }
    .search-box {
        background: rgba(0, 0, 0, 0.03);
        border-color: rgba(0, 0, 0, 0.08);
    }
    .search-box:focus-within {
        border-color: rgba(0, 0, 0, 0.16);
    }
}