/* ===================================
   Hải Âu Restaurant - Style System
   Classic & Elegant Vietnamese Cuisine
   =================================== */

/* CSS Custom Properties */
:root {
    /* Color Palette - Terracotta & Sand */
    --color-terracotta: #C2704E;
    --color-terracotta-dark: #A85A3A;
    --color-terracotta-light: #D4956F;
    --color-sand: #F5E6D3;
    --color-sand-light: #FAF3EB;
    --color-sand-dark: #E8D5C0;
    --color-cream: #FDF9F5;
    --color-charcoal: #2C2420;
    --color-warm-gray: #5C4F47;
    --color-light-gray: #9B8E86;
    --color-white: #FFFFFF;
    
    /* Typography */
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Lato', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing Scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    --space-2xl: 8rem;
    
    /* Layout */
    --max-width: 1400px;
    --nav-height: 80px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-charcoal);
    background-color: var(--color-cream);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(253, 249, 245, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-sand-dark);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(44, 36, 32, 0.08);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-charcoal);
}

.logo-icon {
    color: var(--color-terracotta);
}

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

.nav-links a {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-warm-gray);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-terracotta);
    transition: width var(--transition-normal);
}

.nav-links a:hover {
    color: var(--color-terracotta);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-charcoal);
    transition: all var(--transition-normal);
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--color-terracotta);
    color: var(--color-white);
    border: 2px solid var(--color-terracotta);
}

.btn-primary:hover {
    background: var(--color-terracotta-dark);
    border-color: var(--color-terracotta-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(194, 112, 78, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-charcoal);
    border: 2px solid var(--color-charcoal);
}

.btn-secondary:hover {
    background: var(--color-charcoal);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.625rem 1.25rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 0.9rem;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    padding-top: var(--nav-height);
    background: var(--color-cream);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-lg) var(--space-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.hero-content {
    max-width: 580px;
    padding-right: var(--space-md);
}

.hero-eyebrow {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: var(--space-md);
}

.eyebrow-line {
    display: block;
    width: 40px;
    height: 1px;
    background: var(--color-terracotta);
}

.eyebrow-text {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-terracotta);
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    line-height: 1.15;
    color: var(--color-charcoal);
    margin-bottom: var(--space-md);
}

.hero-accent {
    font-style: italic;
    color: var(--color-terracotta);
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-warm-gray);
    margin-bottom: var(--space-lg);
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.hero-meta {
    display: flex;
    gap: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-sand-dark);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.meta-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-light-gray);
}

.meta-value {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-charcoal);
}

.hero-image {
    position: relative;
    height: 700px;
}

.image-frame {
    position: absolute;
    top: 0;
    right: 0;
    width: 85%;
    height: 85%;
    overflow: hidden;
}

.image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-accent {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 55%;
    height: 55%;
    overflow: hidden;
    border: 8px solid var(--color-cream);
}

.image-accent img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-light-gray);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-5px);
    }
    60% {
        transform: translateX(-50%) translateY(-3px);
    }
}

/* ===================================
   Section Styles
   =================================== */
.section-eyebrow {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400;
    line-height: 1.2;
    color: var(--color-charcoal);
    margin-bottom: var(--space-md);
}

.text-accent {
    font-style: italic;
    color: var(--color-terracotta);
}

/* ===================================
   About Section
   =================================== */
.about {
    padding: var(--space-2xl) 0;
    background: var(--color-sand-light);
}

.about-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.about-image-column {
    position: relative;
}

.image-stack {
    position: relative;
    height: 700px;
}

.image-main {
    position: absolute;
    top: 0;
    right: 0;
    width: 75%;
    height: 80%;
    overflow: hidden;
}

.image-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-secondary {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 55%;
    height: 50%;
    overflow: hidden;
    border: 8px solid var(--color-sand-light);
}

.image-secondary img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-content {
    padding: var(--space-md);
}

.about-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-warm-gray);
    margin-bottom: var(--space-md);
}

.about-values {
    display: grid;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.value-item {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
}

.value-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-terracotta);
    border-radius: 50%;
    color: var(--color-white);
}

.value-content h4 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-charcoal);
    margin-bottom: 0.25rem;
}

.value-content p {
    font-size: 0.9rem;
    color: var(--color-light-gray);
}

/* ===================================
   Menu Section
   =================================== */
.menu-section {
    padding: var(--space-2xl) 0;
    background: var(--color-cream);
}

.menu-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.menu-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-xl);
}

.menu-intro {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-warm-gray);
}

.menu-categories {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.menu-category {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.menu-category-reverse {
    direction: rtl;
}

.menu-category-reverse > * {
    direction: ltr;
}

.category-image {
    overflow: hidden;
    height: 500px;
}

.category-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.category-image:hover img {
    transform: scale(1.05);
}

.category-content {
    padding: var(--space-md);
}

.category-content h3 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-charcoal);
    margin-bottom: var(--space-sm);
}

.category-desc {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-warm-gray);
    margin-bottom: var(--space-md);
}

.category-items {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.category-items li {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-sand-dark);
}

.item-name {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-charcoal);
}

.item-desc {
    font-size: 0.9rem;
    color: var(--color-light-gray);
    text-align: right;
    max-width: 280px;
}

.menu-cta {
    text-align: center;
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-sand-dark);
}

.menu-cta p {
    font-size: 1rem;
    color: var(--color-warm-gray);
    margin-bottom: var(--space-md);
}

/* ===================================
   Experience Section
   =================================== */
.experience {
    padding: var(--space-2xl) 0;
    background: var(--color-charcoal);
}

.experience-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.experience-grid {
    display: grid;
    gap: var(--space-xl);
}

.experience-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.experience-item-reverse {
    direction: rtl;
}

.experience-item-reverse > * {
    direction: ltr;
}

.experience-image {
    overflow: hidden;
    height: 400px;
}

.experience-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.experience-image:hover img {
    transform: scale(1.03);
}

.experience-content {
    padding: var(--space-md);
}

.experience-content h3 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-sand);
    margin-bottom: var(--space-sm);
}

.experience-content p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-light-gray);
}

/* ===================================
   Visit Section
   =================================== */
.visit {
    padding: var(--space-2xl) 0;
    background: var(--color-sand-light);
}

.visit-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.visit-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: stretch;
}

.visit-info {
    padding: var(--space-lg);
    background: var(--color-cream);
}

.visit-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin: var(--space-lg) 0;
}

.detail-item {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
}

.detail-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-sand);
    border-radius: 50%;
    color: var(--color-terracotta);
}

.detail-content h4 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-charcoal);
    margin-bottom: 0.25rem;
}

.detail-content p,
.detail-content a {
    font-size: 1rem;
    color: var(--color-warm-gray);
    line-height: 1.6;
}

.detail-content a:hover {
    color: var(--color-terracotta);
}

.visit-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.visit-map {
    min-height: 500px;
    background: var(--color-sand-dark);
}

.visit-map iframe {
    width: 100%;
    height: 100%;
    min-height: 500px;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--color-charcoal);
    color: var(--color-sand);
    padding: var(--space-xl) 0 var(--space-md);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-sand);
    margin-bottom: var(--space-sm);
}

.footer-tagline {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-light-gray);
    max-width: 400px;
}

.footer-info {
    display: flex;
    gap: var(--space-xl);
}

.footer-contact h4,
.footer-hours h4 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-sand);
    margin-bottom: var(--space-sm);
}

.footer-contact p,
.footer-contact a,
.footer-hours p {
    font-size: 0.95rem;
    color: var(--color-light-gray);
    line-height: 1.6;
}

.footer-contact a:hover {
    color: var(--color-terracotta-light);
}

.footer-bottom {
    padding-top: var(--space-md);
    border-top: 1px solid rgba(245, 230, 211, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--color-light-gray);
}

/* ===================================
   Mobile Menu
   =================================== */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 36, 32, 0.98);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    color: var(--color-sand);
    padding: 0.5rem;
}

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.mobile-menu-link {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-sand);
    transition: color var(--transition-fast);
}

.mobile-menu-link:hover {
    color: var(--color-terracotta-light);
}

.mobile-reserve-btn {
    margin-top: var(--space-md);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        padding-right: 0;
        max-width: 100%;
    }
    
    .hero-eyebrow {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-meta {
        justify-content: center;
    }
    
    .hero-image {
        display: none;
    }
    
    .about-layout {
        grid-template-columns: 1fr;
    }
    
    .about-image-column {
        order: -1;
        max-width: 600px;
        margin: 0 auto;
    }
    
    .image-stack {
        height: 500px;
    }
    
    .menu-category {
        grid-template-columns: 1fr;
    }
    
    .menu-category-reverse {
        direction: ltr;
    }
    
    .category-image {
        height: 400px;
    }
    
    .experience-item {
        grid-template-columns: 1fr;
    }
    
    .experience-item-reverse {
        direction: ltr;
    }
    
    .experience-image {
        height: 300px;
    }
    
    .visit-layout {
        grid-template-columns: 1fr;
    }
    
    .visit-map {
        min-height: 400px;
    }
    
    .visit-map iframe {
        min-height: 400px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .footer-tagline {
        max-width: 100%;
    }
    
    .footer-info {
        justify-content: center;
    }
    
    .footer-bottom {
        justify-content: center;
        text-align: center;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 70px;
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding-top: calc(var(--nav-height) + var(--space-md));
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-meta {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: center;
    }
    
    .about-values {
        gap: var(--space-md);
    }
    
    .value-item {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
    
    .visit-actions {
        flex-direction: column;
    }
    
    .visit-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .footer-info {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 15px;
    }
    
    .hero-title {
        font-size: 1.875rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .category-content h3 {
        font-size: 1.5rem;
    }
    
    .experience-content h3 {
        font-size: 1.5rem;
    }
    
    .image-stack {
        height: 400px;
    }
    
    .category-image {
        height: 300px;
    }
    
    .experience-image {
        height: 250px;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}