/* ========================================
   Island Dental Group — Styles
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
    --color-teal-dark: #0F766E;
    --color-teal: #14B8A6;
    --color-teal-light: #5EEAD4;
    --color-teal-pale: #CCFBF1;
    --color-slate-900: #0F172A;
    --color-slate-800: #1E293B;
    --color-slate-700: #334155;
    --color-slate-600: #475569;
    --color-slate-500: #64748B;
    --color-slate-400: #94A3B8;
    --color-slate-300: #CBD5E1;
    --color-slate-200: #E2E8F0;
    --color-slate-100: #F1F5F9;
    --color-slate-50: #F8FAFC;
    --color-white: #FFFFFF;
    
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', system-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;
    
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms 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: 1rem;
    line-height: 1.6;
    color: var(--color-slate-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
    list-style: none;
}

/* --- Skip Link --- */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-sm);
    background: var(--color-teal-dark);
    color: var(--color-white);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    z-index: 1000;
    font-weight: 500;
}

.skip-link:focus {
    top: var(--space-sm);
}

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

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

.text-teal-light {
    color: var(--color-teal-pale);
}

.text-white {
    color: var(--color-white);
}

h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-slate-900);
}

.headline {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.05;
    color: var(--color-white);
    margin-bottom: var(--space-md);
    max-width: 800px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--space-md);
}

.lead {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--color-slate-600);
    line-height: 1.7;
    max-width: 640px;
}

.lead.text-teal-light {
    color: var(--color-teal-pale);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: var(--color-teal);
    border-color: var(--color-teal);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline-light:hover {
    background-color: var(--color-white);
    color: var(--color-slate-900);
    border-color: var(--color-white);
}

.btn-sm {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.0625rem;
}

.btn-full {
    width: 100%;
}

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

.bg-slate {
    background-color: var(--color-slate-100);
}

.bg-teal {
    background-color: var(--color-teal-dark);
}

.text-center {
    text-align: center;
}

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

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-slate-200);
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--color-slate-900);
}

.logo-mark {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-teal-dark), var(--color-teal));
    border-radius: 50%;
    position: relative;
}

.logo-mark::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    background: var(--color-white);
    border-radius: 50%;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 600;
}

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

.nav ul {
    display: flex;
    gap: var(--space-lg);
}

.nav a {
    color: var(--color-slate-700);
    font-size: 0.9375rem;
    font-weight: 500;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-teal-dark);
    transition: width var(--transition-base);
}

.nav a:hover {
    color: var(--color-teal-dark);
}

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

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
    z-index: 101;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-slate-800);
    position: relative;
    transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--color-slate-800);
    left: 0;
    transition: all var(--transition-base);
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

.mobile-menu-btn[aria-expanded="true"] .hamburger {
    background-color: transparent;
}

.mobile-menu-btn[aria-expanded="true"] .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.mobile-menu-btn[aria-expanded="true"] .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -2;
}

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

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(
        to right,
        rgba(15, 23, 42, 0.85) 0%,
        rgba(15, 23, 42, 0.6) 50%,
        rgba(15, 23, 42, 0.3) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    padding-top: calc(72px + var(--space-3xl));
    padding-bottom: var(--space-3xl);
    max-width: 720px;
}

.hero .eyebrow {
    color: var(--color-teal-light);
}

.hero .lead {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--space-xl);
}

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

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

.intro-text p {
    color: var(--color-slate-600);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.intro-image {
    position: relative;
}

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

.image-accent {
    position: absolute;
    bottom: -20px;
    right: -20px;
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--color-teal), var(--color-teal-light));
    border-radius: var(--radius-lg);
    z-index: -1;
    opacity: 0.3;
}

/* --- Services --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.service-card {
    background: var(--color-white);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-slate-200);
    transition: all var(--transition-base);
}

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

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--color-teal-pale);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
}

.service-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-teal-dark);
}

.service-card h3 {
    font-family: var(--font-sans);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-slate-900);
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--color-slate-600);
    line-height: 1.7;
}

/* --- Differentiator --- */
.differentiator-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.diff-text .eyebrow {
    margin-bottom: var(--space-sm);
}

.diff-text p {
    color: var(--color-slate-600);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

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

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    color: var(--color-slate-700);
}

.feature-list li::before {
    content: '';
    width: 8px;
    height: 8px;
    background-color: var(--color-teal);
    border-radius: 50%;
    flex-shrink: 0;
}

.diff-image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* --- New Patients --- */
.new-patients-content {
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
}

.new-patients-content .section-title {
    margin-bottom: var(--space-md);
}

.new-patients-content .lead {
    margin: 0 auto var(--space-xl);
    max-width: 560px;
}

.new-patients-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.new-patients-cta .small-text {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

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

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

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

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--color-teal-pale);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-teal-dark);
}

.contact-item strong {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-slate-900);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-item p {
    color: var(--color-slate-600);
    line-height: 1.6;
    font-size: 0.9375rem;
}

.contact-item a {
    color: var(--color-teal-dark);
}

.contact-item a:hover {
    color: var(--color-teal);
    text-decoration: underline;
}

/* --- Contact Form --- */
.contact-form-wrapper {
    background: var(--color-white);
    border: 1px solid var(--color-slate-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-lg);
}

.contact-form h3,
.form-success h3 {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
    color: var(--color-slate-900);
}

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-slate-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-slate-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--color-slate-900);
    background: var(--color-slate-50);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-teal);
    box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
    background: var(--color-white);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

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

.form-success svg {
    width: 56px;
    height: 56px;
    color: var(--color-teal);
    margin: 0 auto var(--space-md);
}

.form-success h3 {
    margin-bottom: var(--space-sm);
}

.form-success p {
    color: var(--color-slate-600);
    font-size: 0.9375rem;
}

/* --- Footer --- */
.footer {
    background-color: var(--color-slate-900);
    color: var(--color-slate-400);
    padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.logo-light {
    color: var(--color-white);
}

.footer-brand p {
    margin-top: var(--space-md);
    font-size: 0.9375rem;
    line-height: 1.7;
    max-width: 280px;
}

.footer-links h4,
.footer-hours h4,
.footer-contact h4 {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

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

.footer-links a {
    color: var(--color-slate-400);
    font-size: 0.9375rem;
}

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

.footer-hours p,
.footer-contact p {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 4px;
}

.footer-contact a {
    color: var(--color-slate-400);
}

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

.footer-bottom {
    border-top: 1px solid var(--color-slate-800);
    padding-top: var(--space-lg);
    text-align: center;
    font-size: 0.875rem;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --space-4xl: 5rem;
        --space-3xl: 4rem;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        align-items: flex-start;
        padding: calc(72px + var(--space-xl)) var(--space-xl) var(--space-xl);
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-base);
        gap: var(--space-lg);
    }
    
    .nav.open {
        right: 0;
    }
    
    .nav ul {
        flex-direction: column;
        gap: var(--space-md);
        width: 100%;
    }
    
    .nav a {
        font-size: 1.125rem;
    }
    
    .nav .btn {
        width: 100%;
        text-align: center;
    }
    
    .hero-content {
        padding-top: calc(72px + var(--space-xl));
    }
    
    .headline {
        font-size: clamp(2rem, 8vw, 3rem);
    }
    
    .intro-grid,
    .differentiator-content,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .intro-image {
        order: -1;
    }
    
    .intro-image img,
    .diff-image img {
        height: 300px;
    }
    
    .image-accent {
        display: none;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .section {
        padding: var(--space-3xl) 0;
    }
    
    .service-card {
        padding: var(--space-md);
    }
}