/* ============================================
   Dr. James S. Zu — Medical & Health
   Classic & Elegant Design
   Deep Navy + Warm Gold Palette
   ============================================ */

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

:root {
    --navy-900: #0a1628;
    --navy-800: #0f2140;
    --navy-700: #162d56;
    --navy-600: #1e3a6e;
    --navy-500: #254a8a;
    --gold-500: #C5A059;
    --gold-400: #d4b06a;
    --gold-300: #e0c080;
    --gold-200: #f0dfa8;
    --cream-50: #faf8f4;
    --cream-100: #f5f0e8;
    --cream-200: #ede5d8;
    --warm-gray-100: #f7f5f2;
    --warm-gray-200: #ece6dc;
    --warm-gray-300: #d4cdc0;
    --warm-gray-400: #a89e90;
    --warm-gray-500: #7a7068;
    --warm-gray-600: #5a524a;
    --warm-gray-700: #3d3730;
    --white: #ffffff;
    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-sans: 'Lato', 'Helvetica Neue', Arial, sans-serif;
    --shadow-sm: 0 1px 3px rgba(10, 22, 40, 0.08);
    --shadow-md: 0 4px 16px rgba(10, 22, 40, 0.1);
    --shadow-lg: 0 8px 32px rgba(10, 22, 40, 0.12);
    --shadow-xl: 0 16px 48px rgba(10, 22, 40, 0.14);
    --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(--warm-gray-700);
    background-color: var(--cream-50);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a {
    color: var(--gold-500);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--gold-400);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    background: var(--navy-800);
    color: var(--white);
    padding: 8px 16px;
    z-index: 9999;
    border-radius: 4px;
    font-size: 0.875rem;
}

.skip-link:focus {
    top: 16px;
}

/* TYPOGRAPHY */
h1, h2, h3 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
    color: var(--navy-800);
}

/* SECTION EYEBROW */
.section-eyebrow {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold-500);
    margin-bottom: 16px;
}

/* SECTION TITLE */
.section-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    margin-bottom: 24px;
    color: var(--navy-800);
}

/* LEAD TEXT */
.lead {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--warm-gray-600);
    margin-bottom: 20px;
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    border-radius: 4px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--gold-500);
    color: var(--navy-900);
    border-color: var(--gold-500);
}

.btn-primary:hover {
    background: var(--gold-400);
    border-color: var(--gold-400);
    color: var(--navy-900);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline-light {
    background: transparent;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-light:hover {
    background: var(--white);
    color: var(--navy-800);
    border-color: var(--white);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1rem;
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition);
    background: transparent;
}

.site-header.scrolled {
    background: rgba(10, 22, 40, 0.97);
    padding: 12px 0;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-mark {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gold-500);
    letter-spacing: 0.08em;
    border: 1.5px solid var(--gold-500);
    padding: 6px 10px;
    border-radius: 3px;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--white);
    letter-spacing: 0.02em;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.nav-link {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 0.04em;
    padding: 8px 16px;
    border-radius: 4px;
    transition: all var(--transition);
    text-decoration: none;
}

.nav-link:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.08);
}

.nav-cta {
    margin-left: 16px;
    color: var(--gold-500) !important;
    font-weight: 700;
    border: 1px solid var(--gold-500);
    border-radius: 4px;
    padding: 8px 20px;
}

.nav-cta:hover {
    background: var(--gold-500);
    color: var(--navy-900) !important;
}

/* NAV TOGGLE */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all var(--transition);
    transform-origin: center;
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--navy-900);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.45;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(10, 22, 40, 0.92) 0%,
        rgba(15, 33, 64, 0.85) 40%,
        rgba(22, 45, 86, 0.75) 100%
    );
}

.hero .container {
    position: relative;
    z-index: 2;
    padding-top: 100px;
    padding-bottom: 60px;
    max-width: 800px;
}

.hero-content {
    max-width: 720px;
}

.hero-eyebrow {
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--gold-500);
    margin-bottom: 24px;
}

.hero-headline {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    color: var(--white);
    margin-bottom: 28px;
}

.hero-headline em {
    font-style: italic;
    color: var(--gold-300);
}

.hero-sub {
    font-size: 1.125rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.78);
    margin-bottom: 40px;
    max-width: 580px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: rgba(255, 255, 255, 0.5);
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.5; }
    50% { transform: translateX(-50%) translateY(8px); opacity: 1; }
}

/* GOLD DIVIDER */
.gold-divider {
    width: 60px;
    height: 2px;
    background: var(--gold-500);
    margin-bottom: 24px;
}

/* ============================================
   ABOUT
   ============================================ */
.about {
    padding: 120px 0;
    background: var(--cream-50);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: var(--shadow-lg);
}

.about-image-accent {
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 200px;
    height: 200px;
    border: 2px solid var(--gold-500);
    border-radius: 4px;
    z-index: -1;
}

.about-content {
    padding: 20px 0;
}

.about-content p {
    margin-bottom: 16px;
    color: var(--warm-gray-600);
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--navy-700);
}

.feature-item svg {
    color: var(--gold-500);
    flex-shrink: 0;
}

/* ============================================
   SERVICES
   ============================================ */
.services {
    padding: 120px 0;
    background: var(--navy-800);
}

.services .section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 64px;
}

.services .section-title {
    color: var(--white);
}

.services .section-sub {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.7;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    padding: 40px 32px;
    transition: all var(--transition);
}

.service-card:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: var(--gold-500);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--gold-500);
    border-radius: 4px;
    margin-bottom: 24px;
    color: var(--gold-500);
}

.service-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.9375rem;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.62);
}

/* ============================================
   APPROACH
   ============================================ */
.approach {
    padding: 120px 0;
    background: var(--cream-50);
}

.approach-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.approach-text p {
    color: var(--warm-gray-600);
    margin-bottom: 16px;
}

.approach-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.value-card {
    background: var(--white);
    border-radius: 6px;
    padding: 32px 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--warm-gray-200);
    transition: all var(--transition);
}

.value-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--gold-200);
    transform: translateY(-2px);
}

.value-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--gold-500);
    line-height: 1;
    margin-bottom: 12px;
}

.value-card h3 {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--navy-800);
    margin-bottom: 8px;
}

.value-card p {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--warm-gray-500);
}

/* ============================================
   VISIT
   ============================================ */
.visit {
    padding: 120px 0;
    background: var(--white);
}

.visit-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: stretch;
}

.visit-info {
    padding: 40px;
    background: var(--navy-800);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
}

.visit-info .section-title {
    color: var(--white);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin: 32px 0;
    flex: 1;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-item svg {
    color: var(--gold-500);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-item strong {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gold-500);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 1rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
}

.contact-item a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: underline;
    text-decoration-color: rgba(197, 160, 89, 0.4);
    text-underline-offset: 3px;
}

.contact-item a:hover {
    color: var(--gold-300);
    text-decoration-color: var(--gold-500);
}

.visit-info .btn-primary {
    align-self: flex-start;
    margin-top: 8px;
}

.visit-map {
    border-radius: 6px;
    overflow: hidden;
    min-height: 400px;
    box-shadow: var(--shadow-md);
}

.visit-map iframe {
    width: 100%;
    height: 100%;
    min-height: 400px;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: var(--navy-900);
    padding: 64px 0 32px;
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-logo-mark {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gold-500);
    letter-spacing: 0.08em;
    border: 1.5px solid var(--gold-500);
    padding: 6px 10px;
    border-radius: 3px;
    display: inline-block;
    width: fit-content;
}

.footer-logo-text {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
}

.footer-brand p {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.7;
    max-width: 320px;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 8px;
    justify-content: center;
}

.footer-contact p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

.footer-contact strong {
    color: var(--white);
}

.footer-contact a {
    color: var(--gold-500);
}

.footer-contact a:hover {
    color: var(--gold-300);
}

.footer-bottom {
    padding-top: 32px;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.35);
    letter-spacing: 0.04em;
}

/* ============================================
   SCROLL REVEAL
   ============================================ */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .about-grid,
    .approach-content,
    .visit-grid {
        gap: 48px;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--navy-900);
        padding: 80px 32px 32px;
        transition: right var(--transition);
        box-shadow: var(--shadow-xl);
    }

    .main-nav.open {
        right: 0;
    }

    .nav-menu {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
    }

    .nav-link {
        padding: 12px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .nav-cta {
        margin-left: 0;
        margin-top: 16px;
        text-align: center;
        border: 1px solid var(--gold-500);
        border-radius: 4px;
        padding: 12px 20px;
        border-bottom: none;
    }

    .hero .container {
        padding-top: 80px;
    }

    .hero-headline {
        font-size: clamp(1.75rem, 7vw, 2.5rem);
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
        text-align: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image img {
        height: 360px;
    }

    .about-image-accent {
        display: none;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .services {
        padding: 80px 0;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .approach {
        padding: 80px 0;
    }

    .approach-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .approach-values {
        grid-template-columns: 1fr;
    }

    .visit {
        padding: 80px 0;
    }

    .visit-grid {
        grid-template-columns: 1fr;
    }

    .visit-info {
        padding: 32px 24px;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .scroll-indicator {
        display: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero .container {
        padding: 0 16px;
    }

    .section-title {
        font-size: 1.625rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.875rem;
    }

    .btn-large {
        padding: 14px 28px;
    }
}

/* MOBILE NAV OVERLAY */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

.nav-overlay.active {
    display: block;
}