/* ==========================================================================
   Kalyan Hospital - Master Stylesheet
   Modern, Responsive Healthcare Website Design
   ========================================================================== */

:root {
    --primary-red: #b31b1b;
    --primary-red-dark: #8e1414;
    --primary-red-light: #d62828;
    --secondary-dark: #1e293b;
    --secondary-slate: #334155;
    --accent-gold: #f59e0b;
    --text-main: #1f2937;
    --text-muted: #64748b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --border-subtle: #f1f5f9;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
    --shadow-floating: 0 12px 30px rgba(0, 0, 0, 0.12);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: all 0.25s ease;
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    color: var(--text-main);
    background-color: var(--bg-light);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    color: var(--primary-red);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-red-dark);
}

ul, ol {
    list-style: none;
}

button, input, select, textarea {
    font: inherit;
}

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1240px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
}

.site-main {
    min-height: calc(100vh - 450px);
    padding-bottom: 60px;
}

/* ==========================================================================
   HEADER SYSTEM: THREE DISTINCT LAYERS
   ========================================================================== */
.site-header {
    width: 100%;
    position: relative;
    z-index: 1000;
}

/* LAYER 1: Top Contact Bar */
.header-layer-1 {
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8125rem;
    padding: 7px 0;
}

.layer-1-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.layer-1-left {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.contact-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--secondary-slate);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

.contact-item:hover {
    color: var(--primary-red);
}

.contact-icon {
    color: var(--primary-red);
    flex-shrink: 0;
}

.layer-1-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.social-icon-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background-color: #f1f5f9;
    color: #475569;
    transition: var(--transition);
}

.social-icon-link:hover {
    background-color: var(--primary-red);
    color: #ffffff;
    transform: translateY(-2px);
}

/* LAYER 2: Main Hospital Branding Bar */
.header-layer-2 {
    background-color: var(--primary-red);
    color: #ffffff;
    padding: 16px 0 38px 0; /* extra bottom padding for floating Layer 3 overlap */
    position: relative;
}

.layer-2-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.branding-logos {
    display: flex;
    align-items: center;
    gap: 18px;
}

.brand-logo-link {
    display: inline-block;
    background: #ffffff;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    line-height: 1;
}

.brand-logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
    vertical-align: middle;
}

.nabh-logo-wrap {
    display: inline-block;
    background: #ffffff;
    padding: 5px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    line-height: 1;
}

.nabh-logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
    vertical-align: middle;
}

.branding-info {
    display: flex;
    align-items: center;
    gap: 32px;
}

.info-pill {
    display: flex;
    align-items: center;
    gap: 12px;
}

.pill-icon {
    color: #ffffff;
    flex-shrink: 0;
    opacity: 0.95;
}

.pill-text {
    display: flex;
    flex-direction: column;
}

.pill-title {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.85);
    text-transform: uppercase;
}

.pill-desc {
    font-size: 0.875rem;
    font-weight: 600;
    color: #ffffff;
}

/* LAYER 3: Floating White Navigation Bar */
.nav-floating-wrapper {
    position: relative;
    margin-top: -26px; /* overlap Layer 2 smoothly */
    z-index: 1001;
}

.main-navbar {
    background-color: #ffffff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-floating);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 16px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.mobile-nav-header {
    display: none;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
}

.mobile-nav-brand img {
    height: 38px;
    width: auto;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger-box {
    width: 26px;
    height: 20px;
    display: inline-block;
    position: relative;
}

.hamburger-inner, .hamburger-inner::before, .hamburger-inner::after {
    width: 26px;
    height: 3px;
    background-color: var(--primary-red);
    border-radius: 2px;
    position: absolute;
    transition: transform 0.2s ease;
}

.hamburger-inner {
    top: 50%;
    transform: translateY(-50%);
}

.hamburger-inner::before {
    content: '';
    top: -8px;
}

.hamburger-inner::after {
    content: '';
    bottom: -8px;
}

.nav-menu-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.nav-menu {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 2px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 14px 11px;
    font-size: 0.86rem;
    font-weight: 600;
    color: #1e293b;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    white-space: nowrap;
}

.nav-link:hover, .nav-item.active > .nav-link {
    color: var(--primary-red);
    background-color: #fff1f2;
}

.dropdown-chevron {
    color: #64748b;
    transition: transform 0.2s ease;
}

.nav-item:hover > .nav-link .dropdown-chevron {
    transform: rotate(180deg);
    color: var(--primary-red);
}

.mobile-submenu-toggle {
    display: none;
}

/* Dropdown Menus */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 260px;
    background-color: #ffffff;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    z-index: 1002;
}

.nav-item:hover > .dropdown-menu,
.nav-item:focus-within > .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu-treatments,
.dropdown-menu-location {
    max-height: 480px;
    overflow-y: auto;
    min-width: 310px;
}

.dropdown-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 18px;
    font-size: 0.84rem;
    font-weight: 500;
    color: #334155;
    transition: var(--transition);
}

.dropdown-link:hover,
.dropdown-link.active {
    background-color: #fef2f2;
    color: var(--primary-red);
    padding-left: 22px;
}

/* Nested Dropdown */
.dropdown-item.has-nested {
    position: relative;
}

.nested-chevron {
    color: #94a3b8;
}

.nested-dropdown-menu {
    position: absolute;
    top: 0;
    left: 100%;
    min-width: 220px;
    background-color: #ffffff;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    padding: 6px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateX(10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    z-index: 1003;
}

.dropdown-item.has-nested:hover > .nested-dropdown-menu,
.dropdown-item.has-nested:focus-within > .nested-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

/* CTA in Nav */
.nav-cta-container {
    margin-left: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 18px;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    border: none;
}

.btn-appointment {
    background-color: var(--primary-red);
    color: #ffffff;
    box-shadow: 0 2px 4px rgba(179, 27, 27, 0.25);
}

.btn-appointment:hover {
    background-color: var(--primary-red-dark);
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(179, 27, 27, 0.35);
}

/* ==========================================================================
   BREADCRUMBS
   ========================================================================== */
.breadcrumbs-nav {
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
    font-size: 0.8125rem;
}

.breadcrumbs-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.breadcrumb-item {
    display: inline-flex;
    align-items: center;
    color: var(--text-muted);
}

.breadcrumb-item + .breadcrumb-item::before {
    content: '/';
    color: #94a3b8;
    margin-right: 8px;
}

.breadcrumb-item a {
    color: var(--secondary-slate);
}

.breadcrumb-item a:hover {
    color: var(--primary-red);
}

.breadcrumb-item.active {
    color: var(--primary-red);
    font-weight: 600;
}

/* ==========================================================================
   PAGE HERO & HEADERS
   ========================================================================== */
.page-hero {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: #ffffff;
    padding: 50px 0;
    position: relative;
    overflow: hidden;
    margin-bottom: 40px;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 35%;
    background: radial-gradient(circle, rgba(179, 27, 27, 0.25) 0%, transparent 70%);
    pointer-events: none;
}

.page-hero-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.page-hero-subtitle {
    font-size: 1rem;
    color: #94a3b8;
    max-width: 680px;
}

/* ==========================================================================
   CONTENT SECTIONS & CARDS
   ========================================================================== */
.section {
    padding: 50px 0;
}

.section-title {
    font-size: 1.85rem;
    font-weight: 700;
    color: var(--secondary-dark);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.section-lead {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 35px;
    max-width: 750px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.card {
    background-color: #ffffff;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--secondary-dark);
    margin-bottom: 8px;
}

.card-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.55;
    margin-bottom: 16px;
}

/* Doctor Profile Cards */
.doctor-profile-card {
    display: flex;
    gap: 28px;
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 30px;
    box-shadow: var(--shadow-md);
    margin-bottom: 30px;
}

.doctor-img-wrap {
    flex-shrink: 0;
    width: 200px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background-color: #f1f5f9;
}

.doctor-img-wrap img {
    width: 100%;
    height: auto;
    display: block;
}

.doctor-details h2 {
    font-size: 1.6rem;
    color: var(--secondary-dark);
    margin-bottom: 4px;
}

.doctor-qualification {
    display: inline-block;
    color: var(--primary-red);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.doctor-designation {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

/* Forms */
.form-card {
    background: #ffffff;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 30px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--secondary-dark);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: #ffffff;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-red);
    box-shadow: 0 0 0 3px rgba(179, 27, 27, 0.12);
}

/* ==========================================================================
   FOOTER STYLES
   ========================================================================== */
.site-footer {
    background-color: #0f172a;
    color: #cbd5e1;
    font-size: 0.875rem;
}

/* Emergency Helpline Strip */
.footer-emergency-strip {
    background-color: var(--primary-red);
    color: #ffffff;
    padding: 16px 0;
}

.emergency-strip-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.emergency-col {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.92rem;
}

.emergency-col a {
    color: #ffffff;
    font-weight: 700;
    text-decoration: underline;
}

.btn-emergency-cta {
    background-color: #ffffff;
    color: var(--primary-red);
    font-weight: 700;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.btn-emergency-cta:hover {
    background-color: #f8fafc;
    color: var(--primary-red-dark);
    transform: translateY(-1px);
}

/* Main Footer */
.footer-main {
    padding: 60px 0 40px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1.2fr 1.5fr 1.3fr;
    gap: 40px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
    background: #ffffff;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    width: fit-content;
}

.footer-logo-img {
    height: 42px;
    width: auto;
}

.footer-nabh-img {
    height: 42px;
    width: auto;
}

.footer-tagline {
    font-size: 0.85rem;
    color: #94a3b8;
    line-height: 1.6;
    margin-bottom: 18px;
}

.footer-contact-details {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-contact-row {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.83rem;
    color: #cbd5e1;
}

.footer-contact-row svg {
    color: var(--primary-red-light);
    flex-shrink: 0;
    margin-top: 3px;
}

.footer-contact-row a {
    color: #e2e8f0;
}

.footer-contact-row a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.footer-social-links {
    display: flex;
    gap: 10px;
}

.footer-social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: #1e293b;
    color: #94a3b8;
    border-radius: 50%;
    transition: var(--transition);
}

.footer-social-links a:hover {
    background-color: var(--primary-red);
    color: #ffffff;
    transform: translateY(-2px);
}

.footer-heading {
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 8px;
}

.footer-heading::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 32px;
    height: 2px;
    background-color: var(--primary-red);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-links a {
    color: #94a3b8;
    font-size: 0.84rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: #ffffff;
    padding-left: 4px;
}

/* Bottom Footer */
.footer-bottom {
    border-top: 1px solid #1e293b;
    padding: 22px 0;
    font-size: 0.8125rem;
    color: #64748b;
}

.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-meta-note {
    color: #94a3b8;
}

/* ==========================================================================
   RESPONSIVE DESIGN (TABLETS & MOBILE)
   ========================================================================== */
@media (max-width: 1024px) {
    .header-layer-2 {
        padding-bottom: 24px;
    }

    .branding-info {
        gap: 18px;
    }

    .nav-floating-wrapper {
        margin-top: 0;
    }

    .main-navbar {
        border-radius: var(--radius-sm);
        padding: 0;
        position: relative;
    }

    .mobile-nav-header {
        display: flex;
        padding: 12px 16px;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .nav-menu-container {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: #ffffff;
        border-top: 1px solid var(--border-color);
        max-height: 80vh;
        overflow-y: auto;
    }

    .nav-menu-container.is-open {
        display: flex;
    }

    .nav-menu {
        flex-direction: column;
        width: 100%;
        gap: 0;
    }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid #f1f5f9;
    }

    .nav-link {
        display: flex;
        justify-content: space-between;
        padding: 12px 18px;
        width: 100%;
    }

    .mobile-submenu-toggle {
        display: inline-flex;
        position: absolute;
        right: 12px;
        top: 10px;
        background: #f1f5f9;
        border: none;
        border-radius: 4px;
        padding: 6px;
        cursor: pointer;
    }

    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        background-color: #f8fafc;
        transform: none;
        visibility: visible;
        opacity: 1;
        display: none;
        padding: 4px 0;
    }

    .dropdown-menu.is-submenu-open {
        display: block;
    }

    .nested-dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        background-color: #f1f5f9;
        transform: none;
        visibility: visible;
        opacity: 1;
        display: none;
    }

    .nested-dropdown-menu.is-submenu-open {
        display: block;
    }

    .nav-cta-container {
        width: 100%;
        padding: 16px;
        margin: 0;
    }

    .nav-cta-container .btn {
        width: 100%;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    .grid-4, .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .layer-1-left {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .layer-2-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .branding-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .doctor-profile-card {
        flex-direction: column;
    }

    .doctor-img-wrap {
        width: 100%;
        max-width: 260px;
    }

    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom-inner {
        flex-direction: column;
        text-align: center;
    }

    .emergency-strip-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}