/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    padding: 20px 0;
    transition: all var(--transition-base);
}

.site-header.scrolled {
    padding: 12px 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
}

.site-header.scrolled .site-nav__link {
    color: var(--color-text);
}

.site-header.scrolled .site-nav__link:hover,
.site-header.scrolled .site-nav__link.active {
    color: var(--color-primary);
}

.site-header.scrolled .site-nav__toggle-bar {
    background: var(--color-text);
}

/* Navigation */
.site-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.site-nav__brand {
    flex-shrink: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.site-nav__brand:hover {
    opacity: 0.92;
}

.site-nav__logo {
    height: 64px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
    object-position: center;
    flex-shrink: 0;
    display: block;
    transition: transform var(--transition-base), height var(--transition-base), max-width var(--transition-base);
}

.site-nav__brand:hover .site-nav__logo {
    transform: scale(1.03);
}

.site-header.scrolled .site-nav__logo {
    height: 56px;
    max-width: 130px;
}

/* Brand text beside logo */
.site-nav__brand-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 2px;
    line-height: 1.15;
}

.site-nav__brand-title {
    font-family: var(--font-family);
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.site-nav__brand-title--dark {
    color: #5D4037;
}

.site-nav__brand-title--accent {
    color: var(--color-primary);
}

.site-header.scrolled .site-nav__brand-title {
    font-size: 1.3rem;
}

.site-nav__brand-subtitle {
    font-family: var(--font-family);
    font-size: 0.68rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: var(--color-gray-600);
    white-space: nowrap;
}

.site-header.scrolled .site-nav__brand-subtitle {
    font-size: 0.6rem;
    letter-spacing: 2px;
}

/* Mobile menu brand variant */
.site-nav__brand--mobile .site-nav__logo {
    height: 56px;
    width: auto;
    max-width: 130px;
}

.site-nav__brand--mobile .site-nav__brand-title {
    font-size: 1.25rem;
}

.site-nav__brand--mobile .site-nav__brand-subtitle {
    font-size: 0.58rem;
    letter-spacing: 2px;
}

/* Desktop Menu */
.site-nav__menu {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    padding: 0;
}

.site-nav__link {
    display: inline-block;
    padding: 10px 20px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
}

.site-header:not(.scrolled) .site-nav__link {
    color: var(--color-gray-800);
}

.site-nav__link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: transform var(--transition-base);
}

.site-nav__link:hover,
.site-nav__link.active {
    color: var(--color-primary);
}

.site-nav__link.active::after,
.site-nav__link:hover::after {
    transform: translateX(-50%) scaleX(1);
}

/* Actions */
.site-nav__actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.site-nav__user {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    max-width: 220px;
    padding: 4px 10px 4px 4px;
    border-radius: 999px;
    background: rgba(245, 124, 0, 0.08);
    border: 1px solid rgba(245, 124, 0, 0.18);
}

.site-nav__user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: linear-gradient(135deg, #F57C00, #E65100);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.site-nav__user-meta {
    min-width: 0;
    display: flex;
    flex-direction: column;
    line-height: 1.15;
    padding-right: 4px;
}

.site-nav__user-name {
    font-size: 0.82rem;
    font-weight: 650;
    color: #1A237E;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 140px;
}

.site-nav__user-role {
    font-size: 0.68rem;
    color: #757575;
    font-weight: 500;
}

.mobile-menu__user {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    margin-bottom: 14px;
    padding: 12px;
    border-radius: 14px;
    background: rgba(245, 124, 0, 0.08);
    border: 1px solid rgba(245, 124, 0, 0.16);
}

.mobile-menu__user strong {
    display: block;
    font-size: 0.95rem;
    color: #1A237E;
    font-weight: 700;
}

.mobile-menu__user small {
    display: block;
    font-size: 0.75rem;
    color: #757575;
    margin-top: 2px;
}

/* Mobile Toggle */
.site-nav__toggle {
    width: 44px;
    height: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    z-index: 2;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.site-nav__toggle:hover {
    background: var(--color-primary-ghost);
}

.site-nav__toggle-bar {
    width: 24px;
    height: 2px;
    background: var(--color-gray-800);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.site-nav__toggle.active .site-nav__toggle-bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.site-nav__toggle.active .site-nav__toggle-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.site-nav__toggle.active .site-nav__toggle-bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    inset: 0;
    z-index: var(--z-mobile-menu);
    visibility: hidden;
    pointer-events: none;
}

.mobile-menu.active {
    visibility: visible;
    pointer-events: auto;
}

.mobile-menu__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mobile-menu.active .mobile-menu__overlay {
    opacity: 1;
}

.mobile-menu__panel {
    position: absolute;
    top: 0;
    right: 0;
    width: min(340px, 85vw);
    height: 100%;
    background: var(--color-white);
    padding: 24px;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
}

.mobile-menu.active .mobile-menu__panel {
    transform: translateX(0);
}

.mobile-menu__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-gray-200);
}

.mobile-menu__header .site-nav__brand {
    flex: 1;
    min-width: 0;
}

.mobile-menu__close {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.mobile-menu__close:hover {
    background: var(--color-primary-ghost);
    color: var(--color-primary);
}

.mobile-menu__nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mobile-menu__link {
    display: block;
    padding: 14px 16px;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-menu__link:hover,
.mobile-menu__link.active {
    background: var(--color-primary-ghost);
    color: var(--color-primary);
}

.mobile-menu__actions {
    padding-top: 24px;
    border-top: 1px solid var(--color-gray-200);
}

@media (max-width: 991.98px) {
    .site-nav__logo {
        height: 52px;
        width: auto;
        max-width: 120px;
    }

    .site-nav__brand {
        gap: 10px;
    }

    .site-nav__brand-title {
        font-size: 1.2rem;
    }

    .site-nav__brand-subtitle {
        font-size: 0.58rem;
        letter-spacing: 1.8px;
    }
}

@media (max-width: 400px) {
    .site-nav__brand-subtitle {
        display: none;
    }

    .site-nav__brand-title {
        font-size: 1.1rem;
    }

    .site-nav__logo {
        height: 48px;
        width: auto;
        max-width: 110px;
    }
}