.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--header-bg);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--header-border);
    z-index: 1000;
    display: flex;
    align-items: center;
    overflow: visible;
    transition: background 0.35s ease, border-color 0.35s ease;
}

.header-glow {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(circle at top, var(--header-glow-primary), transparent 60%),
        radial-gradient(circle at bottom, var(--header-glow-secondary), transparent 55%);
    opacity: 0.85;
    z-index: -1;
}

.header .container {
    width: 100%;
}

.header-content {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    width: 100%;
    max-width: var(--container-max);
    height: 100%;
    margin: 0 auto;
    gap: var(--spacing-md);
    padding: 0 var(--spacing-md);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 0;
    justify-self: start;
}

.header-brand .logo {
    min-width: 0;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    background: var(--surface-muted);
    border: 1px solid var(--toggle-border);
    border-radius: 12px;
    cursor: pointer;
    padding: 0.55rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2.5px;
    border-radius: 999px;
    background: var(--text-primary);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.mobile-menu-toggle.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}


.logo a {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.22) 0%, rgba(192, 132, 252, 0.32) 100%);
    box-shadow: 0 10px 30px rgba(76, 29, 149, 0.18);
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    flex-wrap: nowrap;
}

.logo a:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 40px rgba(76, 29, 149, 0.25);
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: clamp(44px, 4.25vw, 72px);
    aspect-ratio: 5 / 3;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 18px 36px rgba(59, 130, 246, 0.25);
    background: linear-gradient(135deg, rgba(29, 78, 216, 0.15), rgba(139, 92, 246, 0.15));
}

.logo-icon picture,
.logo-icon img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: inherit;
    background-color: transparent;
}

.logo-text {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: 0.5px;
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.1rem;
    border-radius: 999px;
    background: var(--badge-bg);
    color: var(--badge-text);
    font-size: 0.85rem;
    letter-spacing: 0.3px;
    box-shadow: inset 0 0 0 1px rgba(168, 85, 247, 0.2);
    transition: background 0.3s ease;
}

.header-badge i {
    color: var(--badge-icon);
    font-size: 1rem;
}

.desktop-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    height: 100%;
    justify-content: center;
    justify-self: center;
}

.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.25rem;
    border-radius: 999px;
    color: var(--nav-link-color);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s ease, transform 0.2s ease;
}

.nav-link::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(147, 51, 234, 0.3), rgba(14, 165, 233, 0.25));
    opacity: 0;
    transition: opacity 0.2s ease;
    z-index: -1;
}

.nav-link:hover,
.nav-link.active {
    color: var(--nav-link-active);
    transform: translateY(-1px);
}

.nav-link:hover::before,
.nav-link.active::before {
    opacity: 1;
}

.nav-more {
    position: relative;
}

.nav-more-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.65rem 1.25rem;
    border-radius: 999px;
    color: var(--nav-link-color);
    font-weight: 500;
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.2s ease, transform 0.2s ease;
}

.nav-more-btn i {
    font-size: 0.9rem;
    transition: transform 0.2s ease;
}

.nav-more.is-open .nav-more-btn i {
    transform: rotate(180deg);
}

.nav-more-btn::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(147, 51, 234, 0.3), rgba(14, 165, 233, 0.25));
    opacity: 0;
    transition: opacity 0.2s ease;
    z-index: -1;
}

.nav-more-btn:hover,
.nav-more.is-open .nav-more-btn {
    color: var(--nav-link-active);
}

.nav-more-btn:hover::before,
.nav-more.is-open .nav-more-btn::before {
    opacity: 1;
}

.nav-more-menu {
    position: absolute;
    top: calc(100% + 0.75rem);
    right: 0;
    min-width: 220px;
    background: var(--surface-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-lg);
    padding: 0.5rem;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0s 0.25s;
    z-index: 1500;
}

.nav-more.is-open .nav-more-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
    transform: translateY(0);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0s;
}

.nav-more-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease;
    font-size: 0.95rem;
}

.nav-more-item i {
    font-size: 1.25rem;
    color: var(--primary);
}

.nav-more-item:hover {
    background: var(--surface-muted);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    justify-self: end;
    flex-shrink: 0;
    flex-wrap: nowrap;
}

.header-auth-mobile {
    display: none;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.85rem;
    border-radius: 999px;
    background: var(--surface-muted);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
    white-space: nowrap;
}

.header-auth-mobile i {
    font-size: 1.25rem;
    color: var(--primary-light);
}

.header-auth-mobile span {
    font-size: 0.9rem;
}

.header-auth-mobile:focus-visible,
.header-auth-mobile:hover {
    background: var(--surface-card-hover);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.header-profile-link {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.55rem 0.95rem;
    border-radius: 999px;
    text-decoration: none;
    background: var(--surface-muted);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.header-profile-link:hover {
    background: var(--surface-card-hover);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.header-profile-icon {
    width: 34px;
    height: 34px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    background: var(--surface-card);
    color: var(--primary-light);
    box-shadow: inset 0 0 0 1px var(--surface-border);
}

.header-profile-text {
    font-size: 0.95rem;
}

.header-link {
    color: var(--nav-link-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.65rem 0.85rem;
    border-radius: 999px;
    transition: color 0.2s ease;
}

.header-link:hover {
    color: var(--nav-link-active);
}

.header-cta {
    box-shadow: 0 12px 30px rgba(147, 51, 234, 0.25);
}

.mobile-nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(12, 10, 24, 0.75);
    backdrop-filter: blur(8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1100;
}

.mobile-nav-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.mobile-nav {
    position: fixed;
    top: 0;
    bottom: 0;
    right: 0;
    width: min(340px, 85vw);
    background: var(--bg-primary);
    border-left: 1px solid var(--surface-border);
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1200;
    display: flex;
    box-shadow: -18px 0 45px rgba(12, 10, 24, 0.35);
}

.mobile-nav.open {
    transform: translateX(0);
}

.mobile-nav-panel {
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: var(--spacing-lg);
    gap: var(--spacing-lg);
    overflow-y: auto;
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--surface-border);
}

.mobile-nav-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.mobile-nav-logo .logo-icon {
    width: 54px;
    max-width: 54px;
    box-shadow: 0 12px 28px rgba(59, 130, 246, 0.2);
}

.mobile-nav-logo .logo-text {
    font-size: 1.1rem;
}

.mobile-nav-close {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    border: 1px solid var(--surface-border);
    background: var(--surface-muted);
    cursor: pointer;
    gap: 6px;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.mobile-nav-close:hover {
    border-color: var(--primary);
    background: var(--surface-muted-hover, var(--surface-muted));
}

.mobile-nav-close span {
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: var(--text-primary);
}

.mobile-nav-close span:first-child {
    transform: rotate(45deg) translate(2px, 2px);
}

.mobile-nav-close span:last-child {
    transform: rotate(-45deg) translate(2px, -2px);
}

.mobile-nav-body {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-nav-item {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 0.85rem;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: background 0.25s ease, color 0.25s ease;
}

.mobile-nav-item i {
    font-size: 1.2rem;
    color: inherit;
}

.mobile-nav-item:hover,
.mobile-nav-item.active {
    background: var(--surface-muted);
    color: var(--text-primary);
}

.mobile-nav-footer {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--surface-border);
}

.mobile-nav-profile {
    width: 100%;
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    background: var(--surface-muted);
    border: 1px solid var(--surface-border);
    color: var(--text-primary);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.mobile-nav-profile:hover {
    background: var(--surface-card-hover);
    border-color: var(--primary);
}

.mobile-nav-profile-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    background: var(--surface-card);
    color: var(--primary-light);
    box-shadow: inset 0 0 0 1px var(--surface-border);
}

.mobile-nav-profile-text {
    flex: 1;
}

.mobile-nav-auth {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--surface-border);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: background 0.25s ease, border-color 0.25s ease;
}

.mobile-nav-auth:hover {
    background: var(--surface-muted);
    border-color: var(--primary);
}

.mobile-nav-cta {
    width: 100%;
    justify-content: center;
}

@media (max-width: 1024px) {
    .header-content {
        gap: var(--spacing-sm);
    }

    .header-badge {
        display: none;
    }
}

@media (max-width: 880px) {
    .desktop-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: inline-flex;
    }

    .header-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--spacing-sm);
    }

    .header-brand {
        flex: 1;
        gap: var(--spacing-sm);
    }

    .header-actions {
        justify-self: flex-end;
    }

    .header-actions .header-link,
    .header-actions .header-cta {
        display: none;
    }

    .header-auth-mobile {
        display: inline-flex;
    }
}

@media (max-width: 640px) {
    .header {
        height: 66px;
    }

    .header-content {
        padding: 0 var(--spacing-sm);
        gap: 0.65rem;
    }

    .header-actions {
        gap: 0.5rem;
    }

    .header-auth-mobile {
        padding: 0.45rem 0.75rem;
        font-size: 0.9rem;
        max-width: 140px;
    }

    .logo a {
        padding: 0.45rem 0.7rem;
        gap: 0.5rem;
    }

    .logo-icon {
        width: 58px;
    }

    .logo-text {
        font-size: 1.05rem;
        max-width: 140px;
    }

    .mobile-menu-toggle {
        padding: 0.5rem;
    }

    .mobile-menu-toggle span {
        width: 22px;
        height: 2.5px;
    }

    .mobile-nav {
        width: min(320px, 90vw);
    }

    .mobile-nav-panel {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .mobile-nav-panel {
        padding: var(--spacing-sm);
    }

    .mobile-nav-item {
        padding: 0.75rem 0.85rem;
    }

    .logo a {
        padding: 0.4rem 0.65rem;
        gap: 0.45rem;
        max-width: 100%;
    }

    .logo-icon {
        width: 52px;
    }

    .mobile-nav-logo .logo-icon {
        width: 50px;
    }

    .logo-text {
        font-size: 1rem;
        max-width: 130px;
    }

    .header-auth-mobile {
        padding: 0.4rem 0.65rem;
    }
}

@media (max-width: 420px) {
    .header-auth-mobile {
        padding: 0.4rem;
        gap: 0.35rem;
    }

    .header-auth-mobile span {
        display: none;
    }
}

@media (max-width: 375px) {
    .header-content {
        padding: 0 0.75rem;
        gap: 0.5rem;
    }

    .mobile-menu-toggle {
        padding: 0.45rem;
    }

    .mobile-menu-toggle span {
        width: 20px;
    }

    .mobile-nav {
        width: min(300px, 92vw);
    }
}

@media (max-width: 320px) {
    .header-content {
        padding: 0 0.5rem;
    }

    .logo a {
        padding: 0.4rem 0.55rem;
    }

    .logo-icon {
        width: 48px;
    }

    .mobile-nav-logo .logo-icon {
        width: 46px;
    }

    .logo-text {
        font-size: 0.95rem;
    }
}

[data-theme="light"] .logo a {
    box-shadow: 0 12px 28px rgba(148, 163, 184, 0.25);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.18), rgba(14, 165, 233, 0.16));
}

[data-theme="light"] .logo-icon {
    box-shadow: 0 14px 30px rgba(148, 163, 184, 0.3);
    background: linear-gradient(135deg, rgba(148, 163, 184, 0.15), rgba(129, 140, 248, 0.12));
}

[data-theme="light"] .mobile-nav {
    background: var(--bg-primary);
    border-left: 1px solid rgba(203, 213, 225, 0.7);
}

[data-theme="light"] .mobile-nav-overlay {
    background: rgba(15, 23, 42, 0.35);
}

[data-theme="light"] .mobile-nav-item:hover,
[data-theme="light"] .mobile-nav-item.active {
    background: rgba(226, 232, 240, 0.8);
}

[data-theme="light"] .nav-more-menu {
    background: #ffffff;
    border: 1px solid rgba(203, 213, 225, 0.6);
    box-shadow: 0 12px 40px rgba(100, 116, 139, 0.25);
}

[data-theme="light"] .nav-more-item:hover {
    background: rgba(226, 232, 240, 0.8);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    width: 50px;
    height: 28px;
    background: var(--surface-muted);
    border: 1px solid var(--toggle-border);
    border-radius: 999px;
    cursor: pointer;
    position: relative;
    padding: 4px;
    flex-shrink: 0;
}

.theme-toggle__thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background: var(--text-primary);
    border-radius: 50%;
    transition: transform 0.3s ease;
}

[data-theme="dark"] .theme-toggle__thumb {
    transform: translateX(22px);
}