/**
 * KF Cooling Co. — Header Styles
 *
 * @package KF_Cooling
 */

/* ── Header ───────────────────────────────────────────── */
.kf-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
    height: var(--header-height);
}

.kf-header--scrolled {
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--border);
}

.kf-header__inner {
    height: var(--header-height);
}

/* ── Logo ─────────────────────────────────────────────── */
.kf-header__brand {
    flex-shrink: 0;
}

.kf-header__logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.kf-header__logo .custom-logo {
    height: 45px;
    width: auto;
}

.kf-header__site-name {
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--text-dark);
    letter-spacing: -0.5px;
    white-space: nowrap;
}

.kf-header__site-name:hover {
    color: var(--primary);
}

/* ── Desktop Navigation ───────────────────────────────── */
.kf-header__nav {
    display: flex;
    align-items: center;
}

.kf-nav-list {
    display: flex;
    list-style: none;
    gap: 8px;
    margin: 0;
    padding: 0;
}

.kf-nav-list li {
    position: relative;
}

.kf-nav-list li a {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-body);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition);
    white-space: nowrap;
}

.kf-nav-list li a:hover,
.kf-nav-list li.current-menu-item a {
    color: var(--primary);
    background: var(--primary-light);
}

/* Dropdown indicator */
.kf-nav-list li.menu-item-has-children > a::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 6px;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid currentColor;
    opacity: 0.5;
}

/* Dropdown menu */
.kf-nav-list .sub-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    list-style: none;
    z-index: 100;
}

.kf-nav-list li:hover > .sub-menu {
    display: block;
}

.kf-nav-list .sub-menu li a {
    padding: 10px 20px;
    font-size: 0.875rem;
    border-radius: 0;
}

.kf-nav-list .sub-menu li a:hover {
    background: var(--primary-light);
}

/* ── Header Actions ───────────────────────────────────── */
.kf-header__actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.kf-header__phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

.kf-header__phone:hover {
    color: var(--primary-dark);
}

.kf-header__cta {
    text-decoration: none;
}

/* ── Mobile Menu Toggle ───────────────────────────────── */
.kf-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    z-index: 1001;
}

.kf-menu-toggle__bar {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all var(--transition);
    transform-origin: center;
}

.kf-menu-toggle--active .kf-menu-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.kf-menu-toggle--active .kf-menu-toggle__bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.kf-menu-toggle--active .kf-menu-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Navigation ────────────────────────────────── */
.kf-mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    background: rgba(0, 29, 92, 0.6);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.kf-mobile-nav--open {
    opacity: 1;
    visibility: visible;
}

/* Mobile nav slide-in with backdrop blur */
.kf-mobile-nav__inner {
    position: absolute;
    top: 0;
    right: 0;
    width: 320px;
    max-width: 85vw;
    height: 100%;
    background: var(--bg-white);
    padding: 100px 30px 40px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -4px 0 24px rgba(0, 29, 92, 0.15);
}

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

/* Hide mobile nav on desktop */
@media (min-width: 1025px) {
    .kf-mobile-nav {
        display: none !important;
        opacity: 0 !important;
        visibility: hidden !important;
    }
    .kf-mobile-nav__inner {
        transform: translateX(100%) !important;
    }
}

.kf-mobile-nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.kf-mobile-nav-list li a {
    display: block;
    padding: 14px 0;
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--text-dark);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
    transition: color var(--transition);
}

.kf-mobile-nav-list li a:hover {
    color: var(--primary);
}

.kf-mobile-nav-list .sub-menu {
    list-style: none;
    padding-left: 20px;
}

.kf-mobile-nav-list .sub-menu li a {
    font-size: 0.9375rem;
    font-weight: 400;
    color: var(--text-body);
}

.kf-mobile-nav__phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    margin-top: 30px;
    text-decoration: none;
}

/* Body scroll lock */
body.kf-menu-open {
    overflow: hidden;
}