/* ============================================
   ข้าวหอมเจ๊แดง - Layout Components
   Navbar, Footer, Floating CTA, Back-to-top, Lightbox
   ============================================ */

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 10px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-text {
    color: var(--white);
    transition: var(--transition-base);
}

.navbar.scrolled .logo-text {
    color: var(--primary-600);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    padding: 8px 16px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

.nav-links a:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

.navbar.scrolled .nav-links a {
    color: var(--text-secondary);
}

.navbar.scrolled .nav-links a:hover {
    color: var(--primary-600);
    background: var(--primary-50);
}

.nav-links a.active {
    color: var(--primary-400);
}

.navbar.scrolled .nav-links a.active {
    color: var(--primary-600);
    background: var(--primary-50);
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    background: var(--gradient-warm);
    color: var(--white);
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-gold);
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    font-family: var(--font-primary);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(212, 136, 42, 0.4);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    width: 24px;
    height: 2.5px;
    background: var(--white);
    border-radius: 2px;
    transition: var(--transition-base);
}

.navbar.scrolled .hamburger span {
    background: var(--gray-700);
}

/* --- Footer --- */
.footer {
    padding: 60px 0 0;
    background: var(--gray-900);
    color: rgba(255, 255, 255, 0.7);
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand .logo-text {
    color: var(--primary-400);
}

.footer-brand p {
    font-size: 0.9375rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.5);
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: var(--primary-400);
    padding-left: 4px;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.3);
}

/* --- Floating CTA --- */
.floating-cta {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.floating-cta.visible {
    opacity: 1;
    transform: translateY(0);
}

.float-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-base);
    font-size: 1.5rem;
}

.float-btn:hover {
    transform: scale(1.1);
}

.float-phone {
    background: var(--gradient-warm);
    animation: pulse 2s ease-in-out infinite;
}

.float-facebook {
    background: #1877F2;
}

.float-line {
    background: #06C755;
    animation: pulse-line 2s ease-in-out infinite;
}

/* --- Back to Top Button --- */
.back-to-top {
    position: fixed;
    bottom: 100px;
    right: 24px;
    z-index: 998;
    width: 48px;
    height: 48px;
    background: var(--surface);
    color: var(--primary-600);
    border: 1px solid var(--gray-200);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--gradient-warm);
    color: var(--white);
    border-color: transparent;
    transform: translateY(-4px);
    box-shadow: var(--shadow-gold);
}

/* --- Lightbox --- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(0, 0, 0, 0.92);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 24px;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 2.5rem;
    cursor: pointer;
    transition: var(--transition-base);
    line-height: 1;
    padding: 8px;
}

.lightbox-close:hover {
    color: var(--white);
    transform: scale(1.2);
}

.lightbox-img {
    max-width: 90vw;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.lightbox.active .lightbox-img {
    transform: scale(1);
}

.lightbox-caption {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    font-weight: 500;
    margin-top: 16px;
    text-align: center;
}