/* ========================================
   Washington Metropolitan Cardiology
   Clean Minimalist Design System
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
    --color-forest-dark: #0f2d1f;
    --color-forest: #1a4a3a;
    --color-forest-mid: #2d6a4f;
    --color-forest-light: #40916c;
    --color-forest-pale: #52b788;
    --color-cream: #f8f7f4;
    --color-cream-dark: #f0ede6;
    --color-white: #ffffff;
    --color-text-dark: #1a1a1a;
    --color-text: #2d2d2d;
    --color-text-muted: #6b6b6b;
    --color-text-light: #9a9a9a;
    --color-line: #e5e2db;
    --color-line-light: #f0ede6;
    
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 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;
    
    --container-max: 1200px;
    --nav-height: 80px;
    
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-slow: 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* --- 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-body);
    font-weight: 300;
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-cream);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

/* --- Container --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-2xl);
    }
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    transition: background-color var(--transition-medium), 
                backdrop-filter var(--transition-medium),
                box-shadow var(--transition-medium);
}

.nav.scrolled {
    background-color: rgba(248, 247, 244, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--color-line);
}

.nav.scrolled .nav-logo-text {
    color: var(--color-forest);
}

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

.nav.scrolled .nav-cta {
    background-color: var(--color-forest);
    color: var(--color-white) !important;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.nav-logo-icon {
    color: var(--color-forest);
    flex-shrink: 0;
}

.nav-logo-text {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--color-forest);
    transition: color var(--transition-fast);
}

.nav-links {
    display: none;
    align-items: center;
    gap: var(--space-xl);
}

.nav-links a {
    font-size: 0.8125rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    position: relative;
}

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

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

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

.nav-cta {
    font-size: 0.8125rem !important;
    font-weight: 500 !important;
    letter-spacing: 0.06em !important;
    text-transform: uppercase !important;
    color: var(--color-forest) !important;
    padding: 0.625rem 1.25rem;
    border: 1px solid var(--color-forest);
    border-radius: 100px;
    transition: all var(--transition-fast) !important;
}

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

.nav-cta:hover {
    background-color: var(--color-forest) !important;
    color: var(--color-white) !important;
}

/* Mobile Toggle */
.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 1.5px;
    background-color: var(--color-forest);
    transition: all var(--transition-fast);
    transform-origin: center;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -5px);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    inset: 0;
    z-index: 999;
    background-color: var(--color-cream);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-medium), visibility var(--transition-medium);
}

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

.mobile-menu-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    color: var(--color-forest);
    padding: 8px;
}

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

.mobile-menu-link {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 400;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

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

.mobile-menu-cta {
    margin-top: var(--space-md);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--color-forest);
    padding: 0.75rem 2rem;
    border: 1px solid var(--color-forest);
    border-radius: 100px;
    transition: all var(--transition-fast);
}

.mobile-menu-cta:hover {
    background-color: var(--color-forest);
    color: var(--color-white);
}

@media (min-width: 1024px) {
    .nav-toggle {
        display: none;
    }
    
    .nav-links {
        display: flex;
    }
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    background-color: var(--color-forest-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(
        to bottom,
        rgba(15, 45, 31, 0.6) 0%,
        rgba(15, 45, 31, 0.4) 50%,
        rgba(15, 45, 31, 0.7) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    padding-top: var(--nav-height);
    padding-bottom: var(--space-3xl);
    width: 100%;
}

.hero-tagline {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-lg);
}

.hero-tagline-line {
    width: 40px;
    height: 1px;
    background-color: rgba(255, 255, 255, 0.5);
    flex-shrink: 0;
}

.hero-headline {
    font-family: var(--font-display);
    font-size: clamp(2.75rem, 6vw, 5.5rem);
    font-weight: 300;
    line-height: 1.1;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
    max-width: 800px;
}

.hero-headline em {
    font-style: italic;
    font-weight: 300;
}

.hero-subheadline {
    font-size: clamp(1rem, 1.2vw, 1.1875rem);
    font-weight: 300;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.8);
    max-width: 520px;
    margin-bottom: var(--space-2xl);
}

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

/* Scroll indicator */
.hero-scroll {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.hero-scroll-line {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50% { opacity: 0.5; transform: scaleY(0.6); }
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 1rem 2rem;
    border-radius: 100px;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-forest);
    color: var(--color-white);
    border: 1px solid var(--color-forest);
}

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

.btn-outline-light {
    background-color: transparent;
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-outline-light:hover {
    border-color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.08);
}

.btn-lg {
    padding: 1.125rem 2.5rem;
    font-size: 0.875rem;
}

/* --- Section Divider --- */
.section-divider {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.divider-line {
    height: 1px;
    background-color: var(--color-line);
}

/* --- Section Labels & Titles --- */
.section-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-forest-mid);
    margin-bottom: var(--space-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.25rem);
    font-weight: 400;
    line-height: 1.15;
    color: var(--color-text-dark);
    margin-bottom: var(--space-xl);
}

/* --- Services --- */
.services {
    padding: var(--space-4xl) 0;
}

.section-header {
    margin-bottom: var(--space-3xl);
}

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

.service-card {
    padding: var(--space-xl);
    border: 1px solid var(--color-line);
    border-radius: 2px;
    transition: all var(--transition-medium);
}

.service-card:hover {
    border-color: var(--color-forest-pale);
    background-color: var(--color-white);
    transform: translateY(-2px);
}

.service-icon {
    color: var(--color-forest);
    margin-bottom: var(--space-md);
}

.service-title {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 500;
    color: var(--color-text-dark);
    margin-bottom: var(--space-sm);
}

.service-description {
    font-size: 0.9375rem;
    font-weight: 300;
    line-height: 1.7;
    color: var(--color-text-muted);
}

@media (min-width: 640px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

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

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

.about-image {
    border-radius: 2px;
    overflow: hidden;
}

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

.about-content {
    max-width: 520px;
}

.about-text {
    font-size: 1rem;
    font-weight: 300;
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.about-values {
    margin-top: var(--space-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

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

.about-value-line {
    width: 32px;
    height: 1px;
    background-color: var(--color-forest-light);
    flex-shrink: 0;
}

.about-value span {
    font-size: 0.9375rem;
    font-weight: 400;
    color: var(--color-text);
}

@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-3xl);
    }
    
    .about-image img {
        height: 600px;
    }
}

/* --- Patient Care --- */
.patient-care {
    padding: var(--space-4xl) 0;
    background-color: var(--color-white);
}

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

.patient-care-text {
    max-width: 520px;
}

.patient-care-text > p {
    font-size: 1rem;
    font-weight: 300;
    line-height: 1.8;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
}

.patient-care-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.patient-care-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    font-size: 0.9375rem;
    font-weight: 400;
    color: var(--color-text);
    line-height: 1.5;
}

.patient-care-list-icon {
    color: var(--color-forest);
    flex-shrink: 0;
    margin-top: 2px;
}

.patient-care-image {
    border-radius: 2px;
    overflow: hidden;
}

.patient-care-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

@media (min-width: 768px) {
    .patient-care-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-3xl);
    }
    
    .patient-care-image img {
        height: 500px;
    }
}

/* --- CTA --- */
.cta {
    padding: var(--space-4xl) 0;
    background-color: var(--color-forest-dark);
    text-align: center;
}

.cta-content {
    max-width: 640px;
    margin: 0 auto;
}

.cta .section-label {
    color: rgba(255, 255, 255, 0.6);
}

.cta-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 400;
    line-height: 1.15;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
}

.cta-text {
    font-size: 1.0625rem;
    font-weight: 300;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-2xl);
}

.cta-actions {
    display: flex;
    justify-content: center;
}

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

.cta .btn-primary:hover {
    background-color: rgba(255, 255, 255, 0.9);
    border-color: rgba(255, 255, 255, 0.9);
}

/* --- Contact --- */
.contact {
    padding: var(--space-4xl) 0;
}

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

.contact-info {
    max-width: 480px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
    margin-top: var(--space-2xl);
}

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

.contact-detail-icon {
    color: var(--color-forest);
    flex-shrink: 0;
    margin-top: 4px;
}

.contact-detail h4 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text-dark);
    margin-bottom: 4px;
}

.contact-detail p,
.contact-detail a {
    font-size: 0.9375rem;
    font-weight: 300;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.contact-detail a:hover {
    color: var(--color-forest);
}

.contact-map {
    border-radius: 2px;
    overflow: hidden;
    min-height: 350px;
}

@media (min-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-3xl);
    }
    
    .contact-map {
        min-height: 400px;
    }
}

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

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-white);
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 500;
}

.footer-tagline {
    font-size: 0.9375rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.5);
    margin-top: var(--space-sm);
    max-width: 300px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md) var(--space-xl);
}

.footer-links a {
    font-size: 0.8125rem;
    font-weight: 400;
    letter-spacing: 0.04em;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

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

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

.footer-bottom p {
    font-size: 0.8125rem;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.4);
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }
    
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

/* --- Scroll Animations (progressive enhancement) --- */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                    transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    
    .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; }
}

/* --- Accessibility: Reduced Motion --- */
@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;
    }
}