/* 
 * DR REDDY S LABORATORIES LTD (Brand: Reddy Anna)
 * Main Stylesheet
 */

/* ===== RESET & BASE STYLES ===== */
:root {
  /* Color palette - clinical, professional */
  --primary: #00529b;      /* Deep blue */
  --primary-light: #3378b5;
  --primary-dark: #003b7a;
  --secondary: #e74c3c;    /* Accent red */
  --secondary-light: #f1948a;
  --text-dark: #333333;
  --text-medium: #555555;
  --text-light: #777777;
  --bg-light: #f9f9f9;
  --bg-white: #ffffff;
  --border-light: #e0e0e0;
  
  /* Typography */
  --font-primary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-heading: 'Montserrat', 'Roboto', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 5rem;
  
  /* Container widths */
  --container-sm: 540px;
  --container-md: 720px;
  --container-lg: 960px;
  --container-xl: 1140px;
  
  /* Border radius */
  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 10px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* Box sizing rules */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Remove default margin and padding */
html, body, h1, h2, h3, h4, h5, h6, p, ol, ul, li, figure, figcaption, blockquote, dl, dd {
  margin: 0;
  padding: 0;
}

/* Set core body defaults */
body {
  min-height: 100vh;
  scroll-behavior: smooth;
  text-rendering: optimizeSpeed;
  line-height: 1.6;
  font-family: var(--font-primary);
  color: var(--text-dark);
  background-color: var(--bg-white);
  font-size: 16px;
}

/* Make images easier to work with */
img {
  max-width: 100%;
  display: block;
  height: auto;
}

/* Natural flow and rhythm in articles */
article > * + * {
  margin-top: var(--spacing-md);
}

/* Inherit fonts for inputs and buttons */
input, button, textarea, select {
  font: inherit;
}

/* Remove all animations and transitions for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Skip to content link for accessibility */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: var(--bg-white);
  padding: var(--spacing-sm) var(--spacing-md);
  z-index: 100;
  transition: var(--transition-fast);
}

.skip-to-content:focus {
  top: 0;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--primary-dark);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-md);
}

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

a:hover, a:focus {
  color: var(--primary-light);
  text-decoration: underline;
}

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  padding-right: var(--spacing-md);
  padding-left: var(--spacing-md);
  margin-right: auto;
  margin-left: auto;
}

@media (min-width: 576px) {
  .container {
    max-width: var(--container-sm);
  }
}

@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}

@media (min-width: 992px) {
  .container {
    max-width: var(--container-lg);
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: var(--container-xl);
  }
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -15px;
  margin-left: -15px;
}

[class^="col-"] {
  position: relative;
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
}

/* Column classes for responsive grid */
.col-12 {
  flex: 0 0 100%;
  max-width: 100%;
}

@media (min-width: 576px) {
  .col-sm-6 {
    flex: 0 0 50%;
    max-width: 50%;
  }
}

@media (min-width: 768px) {
  .col-md-4 {
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
  }
  
  .col-md-6 {
    flex: 0 0 50%;
    max-width: 50%;
  }
  
  .col-md-8 {
    flex: 0 0 66.666667%;
    max-width: 66.666667%;
  }
}

@media (min-width: 992px) {
  .col-lg-3 {
    flex: 0 0 25%;
    max-width: 25%;
  }
  
  .col-lg-4 {
    flex: 0 0 33.333333%;
    max-width: 33.333333%;
  }
  
  .col-lg-6 {
    flex: 0 0 50%;
    max-width: 50%;
  }
  
  .col-lg-8 {
    flex: 0 0 66.666667%;
    max-width: 66.666667%;
  }
}

/* Spacing utilities */
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.my-1 { margin-top: var(--spacing-xs); margin-bottom: var(--spacing-xs); }
.my-2 { margin-top: var(--spacing-sm); margin-bottom: var(--spacing-sm); }
.my-3 { margin-top: var(--spacing-md); margin-bottom: var(--spacing-md); }
.my-4 { margin-top: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.my-5 { margin-top: var(--spacing-xl); margin-bottom: var(--spacing-xl); }

.py-1 { padding-top: var(--spacing-xs); padding-bottom: var(--spacing-xs); }
.py-2 { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-3 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-4 { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-5 { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }

.px-1 { padding-left: var(--spacing-xs); padding-right: var(--spacing-xs); }
.px-2 { padding-left: var(--spacing-sm); padding-right: var(--spacing-sm); }
.px-3 { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-4 { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }
.px-5 { padding-left: var(--spacing-xl); padding-right: var(--spacing-xl); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

/* Text utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-dark { color: var(--text-dark); }
.text-medium { color: var(--text-medium); }
.text-light { color: var(--text-light); }

.bg-light { background-color: var(--bg-light); }
.bg-white { background-color: var(--bg-white); }
.bg-primary { background-color: var(--primary); color: var(--bg-white); }
.bg-secondary { background-color: var(--secondary); color: var(--bg-white); }

/* ===== COMPONENTS ===== */

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-white);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  max-height: 50px;
  margin-right: var(--spacing-sm);
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary);
}

.logo-text span {
  display: block;
  font-size: 0.875rem;
  color: var(--text-medium);
  font-weight: 400;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.nav-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px 0;
  background-color: var(--primary);
  transition: var(--transition-normal);
}

.nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
}

.nav-item {
  margin-left: var(--spacing-md);
}

.nav-link {
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  position: relative;
}

.nav-link:hover::after,
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: var(--spacing-sm);
  right: var(--spacing-sm);
  height: 2px;
  background-color: var(--primary);
}

@media (max-width: 991px) {
  .nav-toggle {
    display: block;
  }
  
  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--bg-white);
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition-normal);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-xl) var(--spacing-md);
    overflow-y: auto;
  }
  
  .nav.active {
    right: 0;
  }
  
  .nav-list {
    flex-direction: column;
    width: 100%;
  }
  
  .nav-item {
    margin-left: 0;
    margin-bottom: var(--spacing-md);
    width: 100%;
  }
  
  .nav-link {
    display: block;
    padding: var(--spacing-sm) 0;
  }
  
  .nav-link:hover::after,
  .nav-link.active::after {
    left: 0;
    right: 0;
  }
  
  .nav-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
  }
}

/* Buttons */
.btn {
  display: inline-block;
  font-weight: 500;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  background-color: transparent;
  border: 1px solid transparent;
  padding: 0.5rem 1.25rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

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

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
  text-decoration: none;
  color: var(--bg-white);
}

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

.btn-secondary:hover, .btn-secondary:focus {
  background-color: #c0392b;
  border-color: #c0392b;
  text-decoration: none;
  color: var(--bg-white);
}

.btn-outline {
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline:hover, .btn-outline:focus {
  color: var(--bg-white);
  background-color: var(--primary);
  border-color: var(--primary);
  text-decoration: none;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1.125rem;
}

.btn-sm {
  padding: 0.375rem 1rem;
  font-size: 0.875rem;
}

/* Hero section */
.hero {
  position: relative;
  padding: var(--spacing-xxl) 0;
  background-color: var(--bg-light);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: var(--bg-white);
}

.hero-title {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  color: inherit;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  font-weight: 400;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

@media (max-width: 767px) {
  .hero {
    padding: var(--spacing-xl) 0;
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
  
  .hero-subtitle {
    font-size: 1.25rem;
  }
}

/* Cards */
.card {
  background-color: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  transition: var(--transition-normal);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: var(--spacing-md);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.card-text {
  color: var(--text-medium);
  margin-bottom: var(--spacing-md);
}

.card-icon {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

/* Service cards */
.service-card {
  padding: var(--spacing-lg);
  text-align: center;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  background-color: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-white);
  font-size: 2rem;
}

/* Sections */
.section {
  padding: var(--spacing-xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title h2 {
  position: relative;
  display: inline-block;
  padding-bottom: var(--spacing-sm);
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background-color: var(--primary);
}

.section-subtitle {
  color: var(--text-medium);
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
  text-align: center;
}

/* Testimonials */
.testimonial {
  text-align: center;
  padding: var(--spacing-lg);
  background-color: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.testimonial-text {
  font-style: italic;
  margin-bottom: var(--spacing-md);
}

.testimonial-author {
  font-weight: 700;
}

.testimonial-position {
  color: var(--text-medium);
  font-size: 0.875rem;
}

/* Partners */
.partners {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
}

.partner-logo {
  max-width: 150px;
  height: auto;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: var(--transition-normal);
}

.partner-logo:hover {
  filter: grayscale(0);
  opacity: 1;
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.form-control {
  display: block;
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-dark);
  background-color: var(--bg-white);
  background-clip: padding-box;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.form-control:focus {
  border-color: var(--primary-light);
  outline: 0;
  box-shadow: 0 0 0 0.2rem rgba(0, 82, 155, 0.25);
}

.form-control.is-invalid {
  border-color: var(--secondary);
}

.invalid-feedback {
  display: none;
  width: 100%;
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--secondary);
}

.is-invalid ~ .invalid-feedback {
  display: block;
}

.form-check {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.form-check-input {
  position: absolute;
  margin-top: 0.25rem;
  margin-left: -1.5rem;
}

.form-check-label {
  margin-bottom: 0;
}

/* Contact info */
.contact-info {
  margin-bottom: var(--spacing-lg);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
}

.contact-icon {
  margin-right: var(--spacing-sm);
  color: var(--primary);
  font-size: 1.25rem;
  min-width: 20px;
}

.contact-text {
  color: var(--text-medium);
}

/* Footer */
.footer {
  background-color: #1a1a1a;
  color: #ffffff;
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-logo {
  margin-bottom: var(--spacing-md);
}

.footer-logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--bg-white);
}

.footer-logo-text span {
  display: block;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 400;
}

.footer-heading {
  color: var(--bg-white);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  position: relative;
  padding-bottom: var(--spacing-xs);
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--primary-light);
}

.footer-text {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-md);
}

.footer-contact {
  margin-bottom: var(--spacing-md);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.7);
}

.footer-contact-icon {
  margin-right: var(--spacing-sm);
  color: var(--primary-light);
  min-width: 20px;
}

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

.footer-link-item {
  margin-bottom: var(--spacing-xs);
}

.footer-link {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--bg-white);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  margin-top: var(--spacing-lg);
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.875rem;
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* Map */
.map-container {
  height: 400px;
  width: 100%;
  margin-bottom: var(--spacing-lg);
}

/* Policy pages */
.policy-content {
  max-width: 800px;
  margin: 0 auto;
}

.policy-content h2 {
  margin-top: var(--spacing-xl);
}

.policy-content h3 {
  margin-top: var(--spacing-lg);
}

.policy-content ul, 
.policy-content ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.policy-content li {
  margin-bottom: var(--spacing-xs);
}

/* Responsive adjustments */
@media (max-width: 767px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
  
  .section {
    padding: var(--spacing-lg) 0;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-cta .btn {
    width: 100%;
    margin-bottom: var(--spacing-sm);
  }
}