/* ====================================
   Estate Navi - Header & Navigation
   ==================================== */

.header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
    height: var(--header-height);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    text-decoration: none;
}

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

.logo-icon {
    width: 36px;
    height: 36px;
}

/* Desktop Navigation */
.nav-desktop {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.nav-link {
    position: relative;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: var(--spacing-2) 0;
    transition: color var(--transition-fast);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-cta {
    margin-left: var(--spacing-4);
}

/* Hamburger Button */
.hamburger-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    padding: var(--spacing-2);
    cursor: pointer;
    z-index: var(--z-modal);
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-base);
    margin: 3px 0;
}

/* Hamburger Animation */
.hamburger-btn.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-btn.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-btn.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .header {
        height: var(--header-height-mobile);
    }

    .nav-desktop {
        display: none;
    }

    .hamburger-btn {
        display: flex;
    }

    .logo {
        font-size: var(--font-size-lg);
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }
}