/* ==========================================================================
   CSS Variables & Tokens (LIGHT THEME)
   ========================================================================== */
:root {
  /* Colors */
  --clr-primary: #0A4275;
  --clr-primary-light: #155a9c;
  --clr-primary-dark: #052647;
  
  --clr-secondary: #0da27d;
  --clr-secondary-light: #12c99c;
  --clr-secondary-dark: #09755a;

  --clr-bg: #ffffff;
  --clr-accent: #f8f9fa;
  
  --clr-text-main: #333333;
  --clr-text-muted: #6c757d;
  --clr-text-light: #ffffff;

  --clr-border: #e9ecef;
  
  --clr-whatsapp: #25D366;
  --clr-whatsapp-dark: #128C7E;

  /* Typography */
  --font-family-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Fluid Typography (Mobile First) */
  --fs-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --fs-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --fs-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --fs-md: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --fs-lg: clamp(1.5rem, 1.35rem + 0.75vw, 1.875rem);
  --fs-xl: clamp(2rem, 1.8rem + 1vw, 2.5rem);
  --fs-xxl: clamp(2.5rem, 2.2rem + 1.5vw, 3.25rem);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  --spacing-section: clamp(3rem, 5vw + 1rem, 5rem);

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.12);
  --shadow-soft: 0 20px 40px rgba(10, 66, 117, 0.08);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 9999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease-out;

  /* Container */
  --container-width: 1200px;
  --container-padding: 1rem;
}

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

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

body {
  font-family: var(--font-family-main);
  background-color: var(--clr-bg);
  color: var(--clr-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

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

ul, ol {
  list-style: none;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--clr-primary-dark);
}

h1 { font-size: var(--fs-xxl); }
h2 { font-size: var(--fs-xl); margin-bottom: var(--spacing-xl); text-align: center; }
h3 { font-size: var(--fs-lg); }
p { font-size: var(--fs-base); color: var(--clr-text-muted); }

/* Utility Classes */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(1.5rem, 5vw, 3rem);
}

.text-center { text-align: center; }
.text-primary { color: var(--clr-primary); }
.text-secondary { color: var(--clr-secondary); }

.section {
  padding-block: var(--spacing-section);
}

.bg-accent { background-color: var(--clr-accent); }
.bg-primary { background-color: var(--clr-primary); color: var(--clr-text-light); }

/* ==========================================================================
   Components
   ========================================================================== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--fs-base);
  text-align: center;
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
  min-height: 44px; /* Touch target minimum */
  min-width: 44px;
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background-color: var(--clr-primary);
  color: var(--clr-text-light);
  box-shadow: var(--shadow-md);
}

.btn--primary:hover, .btn--primary:focus-visible {
  background-color: var(--clr-primary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn--whatsapp {
  background-color: var(--clr-whatsapp);
  color: var(--clr-text-light);
  box-shadow: var(--shadow-md);
}

.btn--whatsapp:hover, .btn--whatsapp:focus-visible {
  background-color: var(--clr-whatsapp-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.btn--outline {
  background-color: transparent;
  color: var(--clr-primary);
  border: 2px solid var(--clr-primary);
}

.btn--outline:hover, .btn--outline:focus-visible {
  background-color: var(--clr-primary);
  color: var(--clr-text-light);
}

/* Cards */
.card {
  background-color: var(--clr-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-soft);
}

.card__icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: var(--clr-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  color: var(--clr-primary);
}

.card__icon svg {
  width: 32px;
  height: 32px;
}

.card__title {
  font-size: var(--fs-md);
  margin-bottom: var(--spacing-md);
  color: var(--clr-primary-dark);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 700px;
  margin-inline: auto;
  margin-bottom: var(--spacing-xxl);
}

.section-header__subtitle {
  color: var(--clr-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-xs);
  display: block;
}

/* ==========================================================================
   Layouts / Sections
   ========================================================================== */

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--clr-bg);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: transform var(--transition-normal);
}

.header.scroll-up {
  transform: translateY(0);
}

.header.scroll-down {
  transform: translateY(-100%);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--clr-primary);
  z-index: 1001;
}

.nav__logo-icon {
  width: 32px;
  height: 32px;
  fill: var(--clr-primary);
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
  padding: var(--spacing-xs);
  min-height: 44px;
  min-width: 44px;
}

.nav__toggle-icon,
.nav__toggle-icon::before,
.nav__toggle-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--clr-primary-dark);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.nav__toggle-icon {
  position: relative;
}

.nav__toggle-icon::before,
.nav__toggle-icon::after {
  content: '';
  position: absolute;
  left: 0;
}

.nav__toggle-icon::before { top: -8px; }
.nav__toggle-icon::after { top: 8px; }

/* Menu Open State */
.nav-open .nav__toggle-icon { background-color: transparent; }
.nav-open .nav__toggle-icon::before { transform: translateY(8px) rotate(45deg); }
.nav-open .nav__toggle-icon::after { transform: translateY(-8px) rotate(-45deg); }

/* Navigation Menu */
.nav__menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 400px;
  height: 100vh;
  background-color: var(--clr-bg);
  padding: 80px var(--spacing-xl) var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  transition: right var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  z-index: 1000;
}

.nav-open .nav__menu {
  right: 0;
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.nav__link {
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--clr-text-main);
  display: block;
  padding-block: var(--spacing-xs);
}

.nav__link:hover, .nav__link:focus-visible, .nav__link.active {
  color: var(--clr-primary);
}

/* Overlay */
.nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
  z-index: 999;
}

.nav-open .nav-overlay {
  opacity: 1;
  visibility: visible;
}

/* Desktop Nav */
@media (min-width: 992px) {
  .nav__toggle { display: none; }
  
  .nav__menu {
    position: static;
    flex-direction: row;
    height: auto;
    width: auto;
    padding: 0;
    box-shadow: none;
    align-items: center;
    background-color: transparent;
  }

  .nav__list {
    flex-direction: row;
    gap: clamp(1rem, 2vw, var(--spacing-lg));
  }

  .nav__link {
    font-size: var(--fs-base);
  }

  .nav-overlay { display: none; }
}

/* Main Padding to account for fixed header */
main {
  padding-top: 70px;
}

/* Hero Section */
.hero {
  padding-block: clamp(3rem, 10vw, 6rem);
  position: relative;
  overflow: hidden;
  background-color: var(--clr-accent);
}

.hero__container {
  display: grid;
  gap: var(--spacing-xl);
  align-items: center;
}

.hero__content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  z-index: 2;
}

/* Center hero if it's the only child (no image) */
.hero__container:has(> :only-child) {
  grid-template-columns: 1fr;
  text-align: center;
  max-width: 800px;
  margin-inline: auto;
}

.hero__container:has(> :only-child) .hero__actions {
  justify-content: center;
}

.hero__container:has(> :only-child) .hero__subtitle {
  margin-inline: auto;
}

.hero__title {
  font-size: var(--fs-xxl);
}

.hero__subtitle {
  font-size: var(--fs-md);
  color: var(--clr-text-muted);
  max-width: 600px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.hero__trust-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.hero__container:has(> :only-child) .hero__trust-list {
  justify-content: center;
  grid-template-columns: repeat(auto-fit, minmax(200px, max-content));
}

.hero__trust-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 500;
  color: var(--clr-primary-dark);
}

.hero__trust-item svg {
  color: var(--clr-secondary);
  width: 24px;
  height: 24px;
}

.hero__image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.hero__image {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4/3;
}

/* Desktop Hero */
@media (min-width: 992px) {
  .hero__container:not(:has(> :only-child)) {
    grid-template-columns: 1.2fr 1fr;
  }
  .hero__trust-list {
    grid-template-columns: 1fr 1fr;
  }
}

/* Trust Section */
.trust {
  background-color: var(--clr-primary);
  color: var(--clr-text-light);
}

.trust h2, .trust .section-header__subtitle {
  color: var(--clr-text-light);
}

.trust__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.trust-item {
  text-align: center;
  padding: var(--spacing-lg);
}

.trust-item__icon {
  width: 64px;
  height: 64px;
  margin-inline: auto;
  margin-bottom: var(--spacing-md);
  color: var(--clr-secondary);
}

.trust-item__title {
  color: var(--clr-text-light);
  font-size: var(--fs-md);
  margin-bottom: var(--spacing-sm);
}

.trust-item__desc {
  color: rgba(255, 255, 255, 0.8);
}

/* Services Section */
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

/* Doctors Section */
.doctors__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.doctor-card {
  text-align: center;
  overflow: hidden;
}

.doctor-card__image-wrapper {
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  margin-inline: auto;
  max-width: 250px;
  border: 4px solid var(--clr-accent);
}

.doctor-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.doctor-card__title {
  margin-bottom: 0;
}

.doctor-card__specialty {
  color: var(--clr-secondary);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

/* Patient Journey Section */
.journey__steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  position: relative;
}

.journey-step {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-lg);
}

.journey-step__number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background-color: var(--clr-primary);
  color: var(--clr-text-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-lg);
  font-weight: 700;
  position: relative;
  z-index: 2;
}

@media (min-width: 768px) {
  .journey__steps {
    grid-template-columns: repeat(3, 1fr);
  }
  .journey-step {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .journey-step__number::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 100%;
    width: 200%;
    height: 2px;
    background-color: var(--clr-border);
    z-index: -1;
  }
  .journey-step:last-child .journey-step__number::after {
    display: none;
  }
}

/* Testimonials Section */
.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.testimonial-card {
  background-color: var(--clr-accent);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  position: relative;
}

.testimonial-card::before {
  content: '""';
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 80px;
  color: rgba(10, 66, 117, 0.05);
  font-family: serif;
  line-height: 1;
}

.testimonial-card__text {
  font-size: var(--fs-md);
  font-style: italic;
  margin-bottom: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.testimonial-card__author {
  font-weight: 600;
  color: var(--clr-primary-dark);
}

/* CTA Final Section */
.cta-final {
  background-color: var(--clr-primary-dark);
  color: var(--clr-text-light);
  text-align: center;
}

.cta-final h2 {
  color: var(--clr-text-light);
  margin-bottom: var(--spacing-md);
}

.cta-final p {
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--spacing-lg);
}

.cta-final__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

/* Footer */
.footer {
  background-color: #031424;
  color: rgba(255, 255, 255, 0.7);
  padding-block: var(--spacing-xxl) var(--spacing-md);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer__col-title {
  color: var(--clr-text-light);
  margin-bottom: var(--spacing-md);
  font-size: var(--fs-md);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--clr-text-light);
  font-size: var(--fs-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.footer__logo-icon {
  width: 32px;
  height: 32px;
  fill: var(--clr-text-light);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__link:hover {
  color: var(--clr-secondary);
}

.footer__bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--fs-sm);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
  }
}

/* Floating WhatsApp Button */
.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: var(--clr-whatsapp);
  color: var(--clr-text-light);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(37, 211, 102, 0.4);
  z-index: 100;
  transition: transform var(--transition-normal);
  animation: pulse 2s infinite;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  color: var(--clr-text-light);
}

.whatsapp-float svg {
  width: 35px;
  height: 35px;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
  70% { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* Scroll Animation Classes */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

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