/* ============================================
   Yin'S Tea | 嫣茶屋 — Editorial Tea House
   Charcoal + Coral Palette
   ============================================ */

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

:root {
    --charcoal-900: #1a1a1a;
    --charcoal-800: #2d2d2d;
    --charcoal-700: #3d3d3d;
    --charcoal-600: #4a4a4a;
    --charcoal-500: #5a5a5a;
    --charcoal-100: #f0ece6;
    --charcoal-50: #f7f5f2;
    --coral-600: #c45a3c;
    --coral-500: #d4684a;
    --coral-400: #e07a5f;
    --coral-300: #e8957e;
    --coral-200: #f0b5a3;
    --coral-100: #f8dcd3;
    --coral-50: #fdf1ee;
    
    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-sans);
    color: var(--charcoal-800);
    background-color: var(--charcoal-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ---------- Typography ---------- */
.section-eyebrow {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--coral-500);
    margin-bottom: var(--space-sm);
}

.section-headline {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3.25rem);
    font-weight: 600;
    line-height: 1.15;
    color: var(--charcoal-900);
    margin-bottom: var(--space-lg);
}

.section-headline .accent {
    color: var(--coral-500);
    font-style: italic;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 0.875rem 2rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn--primary {
    background-color: var(--coral-500);
    color: #fff;
}

.btn--primary:hover {
    background-color: var(--coral-600);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(196, 90, 60, 0.3);
}

.btn--ghost {
    background-color: transparent;
    color: var(--charcoal-800);
    border: 1.5px solid var(--charcoal-600);
}

.btn--ghost:hover {
    border-color: var(--coral-500);
    color: var(--coral-500);
}

.btn--large {
    padding: 1rem 2.5rem;
    font-size: 0.9375rem;
}

/* ---------- Navigation ---------- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(247, 245, 242, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(45, 45, 45, 0.08);
    transition: all var(--transition);
}

.nav.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

.nav__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav__logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.1;
}

.nav__logo-cn {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--charcoal-900);
}

.nav__logo-en {
    font-family: var(--font-sans);
    font-size: 0.625rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--coral-500);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav__link {
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--charcoal-600);
    transition: color var(--transition);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background-color: var(--coral-500);
    transition: width var(--transition);
}

.nav__link:hover {
    color: var(--charcoal-900);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__cta-btn {
    padding: 0.625rem 1.5rem;
    background-color: var(--coral-500);
    color: #fff;
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav__cta-btn:hover {
    background-color: var(--coral-600);
    transform: translateY(-1px);
}

.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
    color: var(--charcoal-800);
}

/* ---------- Hero ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    background-color: var(--charcoal-50);
    overflow: hidden;
}

.hero__split {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero__eyebrow {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--coral-500);
    margin-bottom: var(--space-md);
}

.hero__headline {
    font-family: var(--font-serif);
    font-size: clamp(2.25rem, 5vw, 3.75rem);
    font-weight: 600;
    line-height: 1.1;
    color: var(--charcoal-900);
    margin-bottom: var(--space-lg);
}

.hero__subheadline {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--charcoal-600);
    margin-bottom: var(--space-xl);
    max-width: 480px;
}

.hero__actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero__image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 7 / 9;
}

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

.hero__image::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    pointer-events: none;
}

/* ---------- About ---------- */
.about {
    padding: var(--space-4xl) 0;
    background-color: #fff;
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.about__image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 6 / 7;
}

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

.about__content {
    padding: var(--space-lg) 0;
}

.about__text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--charcoal-600);
    margin-bottom: var(--space-md);
}

.about__stats {
    display: flex;
    gap: var(--space-2xl);
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--charcoal-100);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.stat__number {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
    color: var(--coral-500);
    line-height: 1;
}

.stat__label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--charcoal-500);
}

/* ---------- Menu ---------- */
.menu {
    padding: var(--space-4xl) 0;
    background-color: var(--charcoal-50);
}

.menu__header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--space-3xl);
}

.menu__intro {
    font-size: 1.0625rem;
    line-height: 1.7;
    color: var(--charcoal-600);
}

.menu__categories {
    display: flex;
    flex-direction: column;
    gap: var(--space-4xl);
}

.menu__category {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.menu__category--reverse {
    direction: rtl;
}

.menu__category--reverse > * {
    direction: ltr;
}

.menu__category-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 5 / 4;
}

.menu__category-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.menu__category-content {
    padding: var(--space-lg) 0;
}

.menu__category-title {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 600;
    color: var(--charcoal-900);
    margin-bottom: var(--space-lg);
}

.menu__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.menu__list li {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--charcoal-100);
}

.menu__list li:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.menu__item-name {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--charcoal-900);
}

.menu__item-desc {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--charcoal-500);
}

/* ---------- Experience ---------- */
.experience {
    padding: var(--space-4xl) 0;
    background-color: var(--charcoal-900);
}

.experience__features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
}

.feature {
    text-align: center;
    padding: var(--space-xl);
}

.feature__icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: rgba(212, 104, 74, 0.15);
    color: var(--coral-400);
}

.feature__title {
    font-family: var(--font-serif);
    font-size: 1.375rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: var(--space-sm);
}

.feature__text {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.6);
}

/* ---------- Visit ---------- */
.visit {
    padding: var(--space-4xl) 0;
    background-color: #fff;
}

.visit__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.visit__info {
    padding: var(--space-lg) 0;
}

.visit__details {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    margin: var(--space-xl) 0;
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--charcoal-100);
    border-bottom: 1px solid var(--charcoal-100);
}

.visit__detail {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.visit__detail-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--coral-50);
    color: var(--coral-500);
}

.visit__detail-label {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--charcoal-500);
    margin-bottom: var(--space-xs);
}

.visit__detail-value {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--charcoal-800);
}

.visit__detail-value a {
    color: var(--coral-500);
    transition: color var(--transition);
}

.visit__detail-value a:hover {
    color: var(--coral-600);
}

.visit__map {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 6 / 5;
}

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

.visit__map-overlay {
    position: absolute;
    bottom: var(--space-lg);
    left: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background-color: var(--charcoal-900);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 500;
}

.visit__map-overlay svg {
    color: var(--coral-400);
}

/* ---------- Footer ---------- */
.footer {
    background-color: var(--charcoal-900);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-3xl) 0 var(--space-lg);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-2xl);
}

.footer__brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__logo-cn {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: #fff;
}

.footer__logo-en {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--coral-400);
}

.footer__tagline {
    font-size: 0.875rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.5);
    max-width: 280px;
}

.footer__heading {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: var(--space-md);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__links a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition);
}

.footer__links a:hover {
    color: var(--coral-400);
}

.footer__contact p {
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: var(--space-xs);
}

.footer__contact a {
    color: var(--coral-400);
    transition: color var(--transition);
}

.footer__contact a:hover {
    color: var(--coral-300);
}

.footer__bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer__bottom p {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.3);
}

/* ---------- Mobile Menu ---------- */
.nav__menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background-color: rgba(247, 245, 242, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-md);
    border-bottom: 1px solid rgba(45, 45, 45, 0.08);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition);
}

.nav__menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
}

.nav__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ---------- Scroll Reveal (progressive enhancement) ---------- */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .hero__split {
        gap: var(--space-xl);
    }
    
    .about__grid {
        gap: var(--space-2xl);
    }
    
    .menu__category {
        gap: var(--space-2xl);
    }
    
    .experience__features {
        gap: var(--space-lg);
    }
}

@media (max-width: 768px) {
    :root {
        --space-3xl: 4rem;
        --space-4xl: 5rem;
    }
    
    .nav__menu {
        gap: var(--space-md);
    }
    
    .nav__cta-btn {
        display: none;
    }
    
    .hero__split {
        grid-template-columns: 1fr;
        padding: var(--space-2xl) var(--space-lg);
        gap: var(--space-xl);
    }
    
    .hero__image {
        aspect-ratio: 4 / 3;
        order: -1;
    }
    
    .hero__headline {
        font-size: clamp(1.75rem, 6vw, 2.5rem);
    }
    
    .about__grid {
        grid-template-columns: 1fr;
    }
    
    .about__image {
        aspect-ratio: 4 / 3;
    }
    
    .menu__category {
        grid-template-columns: 1fr;
    }
    
    .menu__category--reverse {
        direction: ltr;
    }
    
    .menu__category-image {
        aspect-ratio: 16 / 9;
    }
    
    .experience__features {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .feature {
        padding: var(--space-lg);
    }
    
    .visit__grid {
        grid-template-columns: 1fr;
    }
    
    .visit__map {
        aspect-ratio: 16 / 9;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
}

@media (max-width: 480px) {
    .hero__actions {
        flex-direction: column;
    }
    
    .hero__actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .about__stats {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .btn--large {
        width: 100%;
        justify-content: center;
    }
}