/* ============================================
   Atlantic Medical Group Gastroenterology
   Classic & Elegant Medical Website
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --midnight: #0A2342;
    --midnight-light: #1A3A5C;
    --midnight-dark: #061829;
    --mint: #5FBFBF;
    --mint-light: #7ECDCD;
    --mint-dark: #4A9E9E;
    --mint-pale: #E8F4F4;
    --cream: #FAFAF8;
    --warm-white: #F5F5F0;
    --sand: #EDEBE6;
    --text-primary: #1A1A1A;
    --text-secondary: #4A4A4A;
    --text-muted: #6B6B6B;
    --text-light: #8A8A8A;
    --white: #FFFFFF;
    --border: #E0DED8;
    --border-light: #EDEBE6;

    --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
    --font-sans: 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-sm: 0 1px 3px rgba(10, 35, 66, 0.06);
    --shadow-md: 0 4px 16px rgba(10, 35, 66, 0.08);
    --shadow-lg: 0 8px 32px rgba(10, 35, 66, 0.12);
    --shadow-xl: 0 16px 48px rgba(10, 35, 66, 0.16);

    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--cream);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

a:hover {
    color: var(--mint);
}

h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
    color: var(--midnight);
}

/* --- Skip Link --- */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--midnight);
    color: var(--white);
    padding: var(--space-xs) var(--space-sm);
    z-index: 1000;
    font-size: 0.875rem;
}

.skip-link:focus {
    top: 0;
    color: var(--white);
}

/* --- Container --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-xl);
    }
}

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

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 600;
    color: var(--midnight);
    margin-bottom: var(--space-md);
    line-height: 1.15;
}

.section-subtitle {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 640px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 0.8125rem 1.75rem;
    border-radius: var(--radius-sm);
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--mint);
    color: var(--white);
    border-color: var(--mint);
}

.btn-primary:hover {
    background: var(--mint-dark);
    border-color: var(--mint-dark);
    color: var(--white);
    transform: translateY(-1px);
    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(--midnight);
    border-color: var(--white);
}

.btn-large {
    padding: 1rem 2.25rem;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: transparent;
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
    background: rgba(250, 250, 248, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-md);
    padding-bottom: var(--space-md);
}

/* --- Logo --- */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--white);
    transition: color var(--transition-base);
}

.header.scrolled .logo {
    color: var(--midnight);
}

.logo-icon {
    color: var(--mint-light);
    flex-shrink: 0;
}

.header.scrolled .logo-icon {
    color: var(--mint);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-name {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.logo-sub {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.75;
}

/* --- Navigation --- */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    z-index: 101;
}

.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.header.scrolled .nav-toggle-bar {
    background: var(--midnight);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    list-style: none;
}

.nav-menu a {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--mint-light);
    transition: width var(--transition-base);
}

.nav-menu a:hover {
    color: var(--white);
}

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

.nav-cta {
    background: var(--mint);
    color: var(--white) !important;
    padding: 0.5rem 1.125rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: all var(--transition-base) !important;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    background: var(--mint-dark);
    transform: translateY(-1px);
}

/* --- Mobile Nav --- */
@media (max-width: 767px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: min(320px, 85vw);
        height: 100vh;
        height: 100dvh;
        background: var(--midnight);
        flex-direction: column;
        align-items: flex-start;
        padding: 5rem var(--space-lg) var(--space-xl);
        gap: var(--space-md);
        transition: right var(--transition-base);
        box-shadow: var(--shadow-xl);
    }

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

    .nav-menu a {
        color: rgba(255, 255, 255, 0.8);
        font-size: 1rem;
    }

    .nav-menu a:hover {
        color: var(--white);
    }

    .nav-cta {
        margin-top: var(--space-sm);
    }

    .nav-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 99;
    }

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

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--midnight-dark);
}

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

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

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(6, 24, 41, 0.92) 0%,
        rgba(10, 35, 66, 0.85) 40%,
        rgba(26, 58, 92, 0.72) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    padding-top: calc(5rem + var(--space-xl));
    padding-bottom: var(--space-xl);
    max-width: 720px;
}

.hero-eyebrow {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--mint-light);
    margin-bottom: var(--space-md);
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5.5vw, 3.75rem);
    font-weight: 600;
    color: var(--white);
    line-height: 1.1;
    margin-bottom: var(--space-md);
    letter-spacing: -0.01em;
}

.hero-title em {
    font-style: italic;
    color: var(--mint-light);
}

.hero-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.1875rem);
    color: rgba(255, 255, 255, 0.78);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    max-width: 560px;
}

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

.hero-scroll {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.6875rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-family: var(--font-sans);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50% { opacity: 0.4; transform: scaleY(0.7); }
}

@media (max-width: 767px) {
    .hero-content {
        padding-top: calc(5rem + var(--space-md));
    }

    .hero-scroll {
        display: none;
    }
}

/* --- Intro Section --- */
.intro {
    padding: var(--space-3xl) 0;
    background: var(--cream);
}

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

@media (min-width: 900px) {
    .intro-grid {
        grid-template-columns: 0.9fr 1.1fr;
        gap: var(--space-2xl);
    }
}

.intro-image-wrapper {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.intro-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 400px;
}

.intro-text p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-size: 1.0625rem;
}

.intro-stats {
    display: flex;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
}

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

.stat-number {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--midnight);
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

/* --- Services --- */
.services {
    padding: var(--space-3xl) 0;
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-header .section-subtitle {
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

@media (min-width: 600px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.service-card {
    background: var(--cream);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--mint);
}

.service-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--mint-pale);
    color: var(--mint-dark);
    margin-bottom: var(--space-md);
}

.service-card h3 {
    font-family: var(--font-serif);
    font-size: 1.3125rem;
    font-weight: 600;
    color: var(--midnight);
    margin-bottom: var(--space-xs);
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* --- Why Section --- */
.why-section {
    padding: var(--space-3xl) 0;
    background: var(--midnight);
    color: var(--white);
}

.why-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

@media (min-width: 900px) {
    .why-grid {
        grid-template-columns: 1.1fr 0.9fr;
        gap: var(--space-2xl);
    }
}

.why-section .section-eyebrow {
    color: var(--mint-light);
}

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

.why-intro {
    color: rgba(255, 255, 255, 0.72);
    font-size: 1.0625rem;
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.why-item {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.why-item-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: rgba(95, 191, 191, 0.15);
    color: var(--mint-light);
    margin-top: 0.125rem;
}

.why-item h4 {
    font-family: var(--font-serif);
    font-size: 1.1875rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 0.3125rem;
}

.why-item p {
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.9375rem;
    line-height: 1.65;
}

.why-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.why-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 500px;
}

/* --- Insurance --- */
.insurance {
    padding: var(--space-3xl) 0;
    background: var(--warm-white);
}

.insurance-inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

@media (min-width: 900px) {
    .insurance-inner {
        grid-template-columns: 1.1fr 0.9fr;
        gap: var(--space-2xl);
    }
}

.insurance-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
}

.insurance-text p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.insurance-list {
    list-style: none;
    margin: var(--space-md) 0 var(--space-lg);
}

.insurance-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.625rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.insurance-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 8px;
    height: 8px;
    background: var(--mint);
    border-radius: 50%;
}

.insurance-note {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.insurance-note a {
    color: var(--mint-dark);
    font-weight: 600;
}

.insurance-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.insurance-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 300px;
}

/* --- Contact --- */
.contact {
    padding: var(--space-3xl) 0;
    background: var(--cream);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
}

@media (min-width: 900px) {
    .contact-grid {
        grid-template-columns: 0.9fr 1.1fr;
        gap: var(--space-2xl);
    }
}

.contact-intro {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    margin-bottom: var(--space-lg);
    line-height: 1.7;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.contact-detail {
    display: flex;
    gap: var(--space-md);
}

.contact-detail-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--mint-pale);
    color: var(--mint-dark);
}

.contact-detail h4 {
    font-family: var(--font-serif);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--midnight);
    margin-bottom: 0.25rem;
}

.contact-detail p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.contact-detail a {
    color: var(--mint-dark);
    font-weight: 600;
}

.contact-form-wrapper {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.contact-form-header {
    margin-bottom: var(--space-lg);
}

.contact-form-header h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--midnight);
    margin-bottom: 0.375rem;
}

.contact-form-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm);
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-group {
    margin-bottom: var(--space-sm);
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
    letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 0.875rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--text-primary);
    background: var(--cream);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--mint);
    box-shadow: 0 0 0 3px rgba(95, 191, 191, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-privacy {
    font-size: 0.75rem;
    color: var(--text-light);
    text-align: center;
    margin-top: var(--space-sm);
}

.form-success {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
}

.form-success svg {
    margin: 0 auto var(--space-md);
}

.form-success h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--midnight);
    margin-bottom: var(--space-xs);
}

.form-success p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.65;
}

/* --- Map --- */
.map-section {
    padding: 0;
}

.map-container {
    position: relative;
    background: var(--sand);
}

.map-container iframe {
    width: 100%;
    display: block;
}

/* --- Footer --- */
.footer {
    background: var(--midnight-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-2xl) 0 var(--space-md);
}

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

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr;
        gap: var(--space-xl);
    }
}

.logo-footer {
    color: var(--white);
    margin-bottom: var(--space-sm);
}

.logo-footer .logo-icon {
    color: var(--mint-light);
}

.footer-brand p {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.6);
    max-width: 300px;
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--mint-light);
    margin-bottom: var(--space-md);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-contact p {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 0.375rem;
}

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

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-disclaimer {
    font-size: 0.75rem !important;
    line-height: 1.6;
}

/* --- Scroll Reveal (progressive enhancement) --- */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

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

    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
    .reveal-delay-5 { transition-delay: 0.5s; }
    .reveal-delay-6 { transition-delay: 0.6s; }
}

/* --- Focus visible for accessibility --- */
*:focus-visible {
    outline: 2px solid var(--mint);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--mint);
    outline-offset: 2px;
}