/* ============================================
   DR. KANCHI BATRA MD — San Francisco
   Clean Minimalist | Charcoal + Coral
   ============================================ */

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

:root {
    --charcoal: #2A2A2A;
    --charcoal-deep: #1A1A1A;
    --charcoal-light: #3D3D3D;
    --coral: #E87461;
    --coral-light: #F09080;
    --coral-pale: #FDF0EE;
    --cream: #FAFAF8;
    --warm-white: #F5F4F0;
    --off-white: #EDECE8;
    --text-primary: #1A1A1A;
    --text-secondary: #5A5A5A;
    --text-muted: #8A8A8A;
    --text-light: #F5F4F0;
    --line: rgba(42, 42, 42, 0.12);
    --line-dark: rgba(255, 255, 255, 0.1);
    
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Inter', -apple-system, sans-serif;
    
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-weight: 300;
    color: var(--text-primary);
    background: var(--cream);
    line-height: 1.7;
    font-size: 15px;
    overflow-x: hidden;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(250, 250, 248, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    transition: transform 0.4s var(--ease-smooth);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.nav-logo-mark {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--charcoal);
    letter-spacing: 0.02em;
    width: 36px;
    height: 36px;
    border: 1px solid var(--charcoal);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s, color 0.3s;
}

.nav-logo:hover .nav-logo-mark {
    background: var(--charcoal);
    color: var(--cream);
}

.nav-logo-text {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 400;
    color: var(--charcoal);
    letter-spacing: 0.01em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a {
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    transition: color 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--coral);
    transition: width 0.3s var(--ease-out);
}

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

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

.nav-cta {
    color: var(--coral) !important;
    border: 1px solid var(--coral);
    padding: 0.5rem 1.25rem;
    transition: background 0.3s, color 0.3s !important;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle-line {
    width: 22px;
    height: 1px;
    background: var(--charcoal);
    transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.active .nav-toggle-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle.active .nav-toggle-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    padding: 72px 0 0;
    background: var(--cream);
    position: relative;
    overflow: hidden;
}

.hero-grid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
    display: grid;
    grid-template-columns: 1fr 0.85fr;
    gap: 4rem;
    align-items: center;
    min-height: calc(100vh - 72px);
}

.hero-eyebrow {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--coral);
    margin-bottom: 1.5rem;
}

.hero-headline {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 5.5vw, 5rem);
    font-weight: 300;
    line-height: 1.1;
    color: var(--charcoal);
    margin-bottom: 2rem;
}

.hero-headline .line {
    display: block;
}

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

.hero-desc {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 440px;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 1.75rem;
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border: 1px solid;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
}

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

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

.btn-ghost {
    background: transparent;
    border-color: var(--charcoal);
    color: var(--charcoal);
}

.btn-ghost:hover {
    background: var(--charcoal);
    color: var(--cream);
}

.btn-dark {
    background: var(--charcoal);
    border-color: var(--charcoal);
    color: var(--cream);
}

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

.hero-image {
    position: relative;
}

.hero-image-frame {
    overflow: hidden;
    position: relative;
}

.hero-image-frame img {
    width: 100%;
    height: auto;
    aspect-ratio: 600/780;
    object-fit: cover;
    transition: transform 0.8s var(--ease-out);
}

.hero-image-frame:hover img {
    transform: scale(1.02);
}

.hero-accent-line {
    position: absolute;
    top: -2rem;
    right: -2rem;
    width: 120px;
    height: 120px;
    border-top: 1px solid var(--coral);
    border-right: 1px solid var(--coral);
    pointer-events: none;
}

/* Hero Meta Bar */
.hero-meta {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.hero-meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.meta-label {
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.meta-value {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--charcoal);
}

.meta-link {
    color: var(--coral);
    transition: color 0.3s;
}

.meta-link:hover {
    color: var(--coral-light);
}

.hero-meta-divider {
    width: 1px;
    height: 40px;
    background: var(--line);
    flex-shrink: 0;
}

/* --- Section Shared --- */
.about-label {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.thin-line {
    width: 40px;
    height: 1px;
    background: var(--coral);
    flex-shrink: 0;
}

.thin-line--dark {
    background: var(--charcoal);
}

.label-text {
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 300;
    line-height: 1.15;
    color: var(--charcoal);
    margin-bottom: 1.5rem;
}

.section-title--light {
    color: var(--text-light);
}

/* --- About --- */
.about {
    padding: 8rem 0;
    background: var(--cream);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 4rem;
    align-items: start;
}

.about-text {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--line);
}

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

.stat-number {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 400;
    color: var(--charcoal);
    line-height: 1;
}

.stat-label {
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    background: var(--line);
    align-self: stretch;
}

/* --- Services --- */
.services {
    padding: 8rem 0;
    background: var(--charcoal);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--line-dark), transparent);
}

.services-header {
    margin-bottom: 4rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
}

.service-card {
    padding: 2.5rem;
    border: 1px solid var(--line-dark);
    margin: -0.5px;
    position: relative;
    transition: background 0.4s var(--ease-out);
}

.service-card:hover {
    background: rgba(255, 255, 255, 0.04);
}

.service-card:hover .service-number {
    color: var(--coral);
}

.service-card:hover .service-name {
    color: var(--coral-light);
}

.service-number {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    transition: color 0.3s;
}

.service-name {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--text-light);
    margin-bottom: 0.75rem;
    transition: color 0.3s;
}

.service-desc {
    font-size: 0.88rem;
    line-height: 1.75;
    color: var(--text-muted);
}

/* --- Visit --- */
.visit {
    padding: 8rem 0;
    background: var(--cream);
}

.visit-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: stretch;
}

.visit-address {
    font-style: normal;
    font-family: var(--font-display);
    font-size: 1.4rem;
    line-height: 1.6;
    color: var(--charcoal);
    margin-bottom: 1.5rem;
}

.visit-note {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.visit-phone {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--coral);
    transition: color 0.3s;
}

.visit-phone:hover {
    color: var(--coral-light);
}

.visit-map {
    overflow: hidden;
    min-height: 400px;
}

.visit-map iframe {
    width: 100%;
    height: 100%;
    min-height: 400px;
    display: block;
    filter: grayscale(0.3);
    transition: filter 0.4s;
}

.visit-map:hover iframe {
    filter: grayscale(0);
}

/* --- Contact --- */
.contact {
    padding: 8rem 0;
    background: var(--warm-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-text {
    font-size: 1.05rem;
    line-height: 1.85;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-phone-link {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--charcoal);
    border-bottom: 1px solid var(--coral);
    padding-bottom: 0.25rem;
    transition: color 0.3s, border-color 0.3s;
}

.contact-phone-link:hover {
    color: var(--coral);
    border-color: var(--coral);
}

/* Form */
.contact-form-wrap {
    background: var(--cream);
    padding: 2.5rem;
    border: 1px solid var(--line);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 0;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 300;
    color: var(--charcoal);
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--line);
    outline: none;
    transition: border-color 0.3s;
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:focus {
    border-bottom-color: var(--coral);
}

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

.form-notice {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

.form-success {
    text-align: center;
    padding: 3rem 2rem;
}

.form-success svg {
    color: var(--coral);
    margin-bottom: 1rem;
}

.form-success h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--charcoal);
    margin-bottom: 0.5rem;
}

.form-success p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --- Footer --- */
.footer {
    background: var(--charcoal-deep);
    padding: 3rem 0;
    border-top: 1px solid var(--line-dark);
}

.footer-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--line-dark);
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-logo-mark {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-light);
    width: 32px;
    height: 32px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-logo-text {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--text-light);
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    text-align: right;
}

.footer-phone {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--coral);
    transition: color 0.3s;
}

.footer-phone:hover {
    color: var(--coral-light);
}

.footer-address {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.footer-bottom p {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* --- Scroll Reveal --- */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr 0.7fr;
        gap: 2.5rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(250, 250, 248, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--line);
        transform: translateY(-110%);
        opacity: 0;
        transition: transform 0.4s var(--ease-out), opacity 0.4s var(--ease-out);
        pointer-events: none;
    }
    
    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
        min-height: auto;
        padding: 3rem 2rem 2rem;
    }
    
    .hero-image {
        order: -1;
    }
    
    .hero-image-frame img {
        aspect-ratio: 4/3;
    }
    
    .hero-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.25rem;
        padding: 0 2rem 3rem;
    }
    
    .hero-meta-divider {
        display: none;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .visit-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .visit-map {
        min-height: 300px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-top {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }
    
    .footer-contact {
        text-align: left;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 0.25rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1.25rem;
    }
    
    .nav-inner {
        padding: 0 1.25rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        justify-content: center;
        width: 100%;
    }
    
    .about-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .stat-divider {
        width: 100%;
        height: 1px;
    }
    
    .contact-form-wrap {
        padding: 1.5rem;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}