/**
 * Header Component
 * KJS Lofts inspired design - Clean, professional header with sticky behavior
 * Mobile-first responsive approach
 */

/* ============================================
   BASE STYLES (Mobile First)
   ============================================ */

.header {
    background-color: var(--color-white, #ffffff);
    width: 100%;
    position: fixed;
    top: 38px; /* Below the top bar */
    left: 0;
    right: 0;
    z-index: 999; /* Below top bar z-index */
    transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

/* Sticky header state with subtle shadow */
.header.is-sticky {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

/* Header inner container */
.header__inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ============================================
   LOGO STYLES
   ============================================ */

.header__logo {
    flex-shrink: 0;
    line-height: 0;
    transition: opacity 0.3s ease;
}

.header__logo:hover {
    opacity: 0.85;
}

.header__logo-text {
    font-family: var(--font-heading, 'Montserrat', sans-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary, #212121);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.header__logo img {
    display: block;
    width: auto;
    height: auto;
    max-width: 200px;
    max-height: 60px;
}

/* ============================================
   MOBILE MENU TOGGLE
   ============================================ */

.mobile-menu-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: none;
    color: var(--color-secondary, #0fb6ee);
    font-family: var(--font-heading, 'Montserrat', sans-serif);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    padding: 0.5rem;
    transition: opacity 0.3s ease, transform 0.2s ease;
}

.mobile-menu-toggle:hover {
    opacity: 0.8;
}

.mobile-menu-toggle:active {
    transform: scale(0.95);
}

/* Hamburger icon */
.mobile-menu-toggle__icon {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 24px;
    height: 18px;
}

.mobile-menu-toggle__icon span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-secondary, #0fb6ee);
    transition: all 0.3s ease;
}

/* Hamburger animation when menu is open */
.mobile-menu-toggle.is-active .mobile-menu-toggle__icon span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

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

.mobile-menu-toggle.is-active .mobile-menu-toggle__icon span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* ============================================
   NAVIGATION MENU (Hidden on Mobile)
   ============================================ */

.nav-menu {
    display: none;
}

.nav-menu__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-menu__list li {
    margin: 0;
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: block;
    color: var(--color-text, #000000);
    font-family: var(--font-heading, 'Montserrat', sans-serif);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    padding: 0.75rem 1rem;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--color-secondary, #0fb6ee);
    text-decoration: none;
}

/* Active state */
.nav-link.active {
    color: var(--color-secondary, #0fb6ee);
}

/* Underline effect on hover and active */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0.5rem;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background-color: var(--color-secondary, #0fb6ee);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

/* ============================================
   TABLET STYLES (>768px)
   ============================================ */

@media (min-width: 768px) {
    .header__inner {
        padding: 1.25rem 2rem;
    }

    .header__logo img {
        max-width: 250px;
        max-height: 70px;
    }

    .mobile-menu-toggle {
        font-size: 1rem;
    }
}

/* ============================================
   DESKTOP STYLES (>960px)
   ============================================ */

@media (min-width: 960px) {
    .header__inner {
        padding: 1.5rem 3rem;
    }

    /* Show desktop navigation */
    .nav-menu {
        display: block;
    }

    /* Hide mobile menu toggle */
    .mobile-menu-toggle {
        display: none;
    }

    .header__logo img {
        max-width: 350px;
        max-height: 80px;
    }

    .nav-link {
        font-size: 0.875rem;
        padding: 0.75rem 1.25rem;
    }

    .nav-link::after {
        bottom: 0.5rem;
        left: 1.25rem;
        right: 1.25rem;
    }
}

/* ============================================
   LARGE DESKTOP STYLES (>1200px)
   ============================================ */

@media (min-width: 1200px) {
    .nav-menu__list {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.9rem;
        padding: 0.75rem 1.5rem;
    }

    .nav-link::after {
        left: 1.5rem;
        right: 1.5rem;
    }
}

/* ============================================
   MOBILE MENU DROPDOWN (Optional Enhancement)
   ============================================ */

/* If you want a mobile dropdown menu, add these styles */
.nav-menu--mobile {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white, #ffffff);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    flex-direction: column;
    padding: 1rem 0;
    gap: 0;
}

.nav-menu--mobile.is-open {
    display: flex;
}

.nav-menu--mobile .nav-link {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-menu--mobile .nav-link::after {
    display: none;
}

.nav-menu--mobile .nav-item:last-child .nav-link {
    border-bottom: none;
}

/* ============================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================ */

/* Focus states for keyboard navigation */
.nav-link:focus,
.mobile-menu-toggle:focus {
    outline: 2px solid var(--color-secondary, #0fb6ee);
    outline-offset: 2px;
}

/* Skip to content link (for screen readers) */
.skip-to-content {
    position: absolute;
    top: -100px;
    left: 0;
    background-color: var(--color-secondary, #0fb6ee);
    color: var(--color-white, #ffffff);
    padding: 0.5rem 1rem;
    text-decoration: none;
    z-index: 10000;
    font-weight: 600;
}

.skip-to-content:focus {
    top: 0;
}

/* ============================================
   MOBILE MENU (Slide-out)
   ============================================ */

.mobile-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background: #fff;
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    z-index: 1100;
    transition: right 0.3s ease;
    padding: 1rem;
    overflow-y: auto;
}

.mobile-menu.is-open {
    right: 0;
}

.mobile-menu__header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1rem;
}

.mobile-menu__close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    padding: 0.5rem;
    line-height: 1;
}

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

.mobile-menu__items li {
    border-bottom: 1px solid #eee;
}

.mobile-menu__items .nav-link {
    display: block;
    padding: 1rem 0;
    font-size: 1.1rem;
}

.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1050;
}

.mobile-menu-overlay.is-visible {
    display: block;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .header {
        position: static;
        box-shadow: none;
    }

    .mobile-menu-toggle {
        display: none;
    }

    .nav-menu {
        display: none;
    }
}

/* ============================================
   REDUCED MOTION PREFERENCE
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    .header,
    .header__logo,
    .nav-link,
    .nav-link::after,
    .mobile-menu-toggle,
    .mobile-menu-toggle__icon span {
        transition: none;
    }
}