/* ===================================
   Cancer Naviga - Professional Medical Website
   Design System & Styles
   =================================== */

/* ===================================
   CSS Custom Properties (Design Tokens)
   =================================== */
:root {
    /* Color Palette - Medical Theme with Logo Colors (Green Primary) */
    --primary-green: #10b981;
    --primary-dark: #059669;
    --primary-light: #34d399;
    --secondary-teal: #0d9488;
    --secondary-light: #14b8a6;
    --accent-blue: #3b82f6;
    --accent-orange: #f97316;

    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* Typography */
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Layout */
    --container-max: 1280px;
    --container-padding: 1.5rem;
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* ===================================
   Global Resets & Base Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--gray-800);
    background-color: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ===================================
   Typography
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: var(--text-5xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--text-4xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--text-3xl);
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

p {
    margin-bottom: var(--space-4);
    color: var(--gray-600);
    font-size: var(--text-base);
}

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

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

/* ===================================
   Utility Classes
   =================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Navigation Bar
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: box-shadow var(--transition-base);
}

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

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.navbar-logo img {
    height: 50px;
    width: auto;
}

.navbar-logo span {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--primary-green);
}

.navbar-menu {
    display: flex;
    list-style: none;
    gap: var(--space-8);
    align-items: center;
}

.navbar-menu a {
    color: var(--gray-700);
    font-weight: 500;
    font-size: var(--text-base);
    transition: color var(--transition-fast);
    position: relative;
}

.navbar-menu a:hover {
    color: var(--primary-green);
}

.navbar-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-green);
    transition: width var(--transition-base);
}

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

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--gray-700);
    margin: 5px 0;
    transition: all var(--transition-base);
    border-radius: 2px;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.9), rgba(13, 148, 136, 0.85)),
        url('./assests/hero-image.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--white);
    text-align: center;
    padding-top: 80px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.85), rgba(13, 148, 136, 0.75));
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    padding: var(--space-8);
}

.hero h1 {
    color: var(--white);
    font-size: var(--text-6xl);
    margin-bottom: var(--space-6);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 1s ease-out;
}

.hero-subtext {
    font-size: var(--text-xl);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--space-10);
    line-height: 1.8;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: var(--space-6);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.4s both;
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-block;
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 600;
    text-align: center;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background-color: var(--white);
    color: var(--primary-green);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-secondary:hover {
    background-color: var(--white);
    color: var(--primary-green);
    transform: translateY(-2px);
}

.btn-cta {
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-teal));
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* ===================================
   Section Styles
   =================================== */
.section {
    padding: var(--space-20) 0;
}

.section-alt {
    background-color: var(--gray-50);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-title {
    font-size: var(--text-4xl);
    color: var(--gray-900);
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ===================================
   Service Cards
   =================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
    margin-top: var(--space-12);
}

.service-card {
    background: var(--white);
    padding: var(--space-8);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-200);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-green);
}

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-teal));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-6);
    font-size: var(--text-3xl);
    color: var(--white);
}

.service-card h3 {
    font-size: var(--text-xl);
    color: var(--gray-900);
    margin-bottom: var(--space-3);
}

.service-card p {
    color: var(--gray-600);
    font-size: var(--text-base);
    line-height: 1.7;
}

/* ===================================
   Benefit Cards (Doctors Section)
   =================================== */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.benefit-card {
    background: var(--white);
    padding: var(--space-6);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.benefit-card:hover {
    border-color: var(--secondary-teal);
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.benefit-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--secondary-teal), var(--primary-green));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    font-size: var(--text-2xl);
    color: var(--white);
}

.benefit-card h4 {
    font-size: var(--text-lg);
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.benefit-card p {
    color: var(--gray-600);
    font-size: var(--text-sm);
    margin-bottom: 0;
}

/* ===================================
   About Section
   =================================== */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-item {
    margin-bottom: var(--space-10);
}

.about-item h3 {
    color: var(--primary-green);
    font-size: var(--text-2xl);
    margin-bottom: var(--space-3);
}

.about-item p {
    font-size: var(--text-lg);
    line-height: 1.8;
    color: var(--gray-700);
}

/* ===================================
   Who Should Reach Out Section
   =================================== */
.who-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.who-card {
    background: var(--white);
    padding: var(--space-8);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.who-card:hover {
    border-color: var(--primary-green);
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.who-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-teal));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
    font-size: var(--text-3xl);
    color: var(--white);
}

.who-card h3 {
    font-size: var(--text-xl);
    color: var(--gray-900);
    margin-bottom: var(--space-3);
}

.who-card p {
    color: var(--gray-600);
    font-size: var(--text-sm);
    margin-bottom: 0;
    line-height: 1.6;
}

/* ===================================
   Carousel Section (Why Choose Us)
   =================================== */
.carousel-container {
    overflow: hidden;
    position: relative;
    margin-top: var(--space-12);
    padding: var(--space-4) 0;
}

.carousel-track {
    display: flex;
    gap: var(--space-6);
    animation: scroll 40s linear infinite;
    width: fit-content;
}

.carousel-track:hover {
    animation-play-state: paused;
}

.carousel-card {
    min-width: 320px;
    max-width: 320px;
    background: var(--white);
    padding: var(--space-8);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 2px solid var(--gray-200);
}

.carousel-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-green);
}

.carousel-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-teal));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-5);
    font-size: var(--text-3xl);
    color: var(--white);
}

.carousel-card h4 {
    font-size: var(--text-lg);
    color: var(--gray-900);
    margin-bottom: var(--space-3);
    font-family: var(--font-heading);
}

.carousel-card p {
    color: var(--gray-600);
    font-size: var(--text-sm);
    margin-bottom: 0;
    line-height: 1.6;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(calc(-320px * 9 - var(--space-6) * 9));
    }
}

/* ===================================
   NRI Support Section
   =================================== */
.nri-section {
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-teal));
    color: var(--white);
    padding: var(--space-20) 0;
}

.nri-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.nri-section h2 {
    color: var(--white);
    margin-bottom: var(--space-6);
}

.nri-section p {
    color: rgba(255, 255, 255, 0.95);
    font-size: var(--text-lg);
    line-height: 1.8;
    margin-bottom: var(--space-6);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--gray-900);
    color: var(--white);
    padding: var(--space-20) 0 var(--space-8);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-10);
    margin-bottom: var(--space-12);
}

.footer-section h4 {
    color: var(--white);
    font-size: var(--text-lg);
    margin-bottom: var(--space-4);
}

.footer-section p,
.footer-section a {
    color: var(--gray-400);
    font-size: var(--text-sm);
    line-height: 1.8;
}

.footer-section a:hover {
    color: var(--primary-light);
}

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

.footer-links li {
    margin-bottom: var(--space-2);
}

.social-links {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-4);
}

.social-icon {
    width: 40px;
    height: 40px;
    background-color: var(--gray-800);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--text-lg);
    transition: all var(--transition-base);
}

.social-icon:hover {
    background-color: var(--primary-green);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: var(--space-6);
    text-align: center;
}

.footer-bottom p {
    color: var(--gray-500);
    font-size: var(--text-sm);
    margin: 0;
}

/* ===================================
   Mouse Animation (Pulse of Care)
   =================================== */
.cursor-glow {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, rgba(13, 148, 136, 0.05) 40%, transparent 70%);
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 9999;
    transition: transform 0.1s ease-out;
    mix-blend-mode: multiply;
}

.click-ripple {
    position: absolute;
    border: 2px solid rgba(16, 185, 129, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    animation: ripple-effect 0.8s linear forwards;
    z-index: 9998;
}

@keyframes ripple-effect {
    0% {
        width: 0;
        height: 0;
        opacity: 0.8;
    }

    100% {
        width: 100px;
        height: 100px;
        opacity: 0;
    }
}

/* ===================================
   Modal
   =================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(5px);
    animation: fadeIn var(--transition-base);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    padding: var(--space-10);
    border-radius: var(--border-radius-lg);
    max-width: 500px;
    width: 90%;
    position: relative;
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--transition-base);
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: none;
    border: none;
    font-size: var(--text-3xl);
    color: var(--gray-500);
    cursor: pointer;
    transition: color var(--transition-fast);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--gray-900);
}

.modal h2 {
    margin-bottom: var(--space-6);
    color: var(--primary-green);
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    color: var(--gray-700);
    font-weight: 500;
    font-size: var(--text-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    font-size: var(--text-base);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

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

/* ===================================
   Animations
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .navbar-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        gap: 0;
        padding: var(--space-6);
        box-shadow: var(--shadow-lg);
        transition: left var(--transition-base);
    }

    .navbar-menu.active {
        left: 0;
    }

    .navbar-menu li {
        width: 100%;
        text-align: center;
        padding: var(--space-3) 0;
        border-bottom: 1px solid var(--gray-200);
    }

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

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

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

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero h1 {
        font-size: var(--text-4xl);
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: var(--space-12) 0;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .who-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }

    .carousel-card {
        min-width: 280px;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: var(--text-3xl);
    }

    .section-title {
        font-size: var(--text-3xl);
    }

    .modal-content {
        padding: var(--space-6);
    }

    .who-grid {
        grid-template-columns: 1fr;
    }

    .carousel-card {
        min-width: 260px;
        max-width: 260px;
    }
}