/* ============================================
   CataractCare India — Shared Site Styles
   Accessibility-focused design for international
   patients, especially 55+ users.

   Design direction:
   - Medical trust
   - Calm and premium
   - High readability
   - Strong contrast
   - Comfortable spacing
   - Easy navigation
============================================ */


/* ============================================
   COLOR SYSTEM
============================================ */

:root{
  /* Main text */
  --ink:#243746;
  --ink-soft:#53666D;

  /* Healthcare / trust */
  --teal-deep:#173F4A;
  --teal:#176B78;
  --teal-dark:#125662;
  --teal-pale:#EEF3F2;

  /* Premium warm accent */
  --amber:#C8892E;
  --amber-deep:#A96D1F;
  --amber-light:#F5E8D1;

  /* Page backgrounds */
  --bg:#F8F7F2;
  --bg-alt:#EEF3F2;
  --paper:#FFFFFF;

  /* Borders */
  --line:#D7DFDD;
  --line-dark:#C4D0CE;

  /* Success */
  --success:#4C7A5E;

  /* Radius */
  --radius-s:6px;
  --radius-m:12px;
  --radius-l:18px;

  /* Layout */
  --max:1180px;
}


/* ============================================
   RESET / BASE
============================================ */

*{
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;
  font-family:'Source Sans 3', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,
svg{
  display:block;
  max-width:100%;
}

a{
  color:inherit;
}

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


/* ============================================
   TYPOGRAPHY
============================================ */

h1,
h2,
h3,
h4{
  font-family:'Source Sans 3', system-ui, sans-serif;
  font-weight:650;
  line-height:1.18;
  margin:0 0 .55em;
  color:var(--teal-deep);
  text-wrap:balance;
}

h1{
  font-size:clamp(2.25rem,5vw,4rem);
}

h2{
  font-size:clamp(1.9rem,3.2vw,2.7rem);
}

h3{
  font-size:clamp(1.4rem,2.3vw,1.85rem);
}

h4{
  font-size:1.25rem;
}

p{
  margin:0 0 1em;
  max-width:68ch;
}

strong{
  font-weight:650;
}

small{
  font-size:.9rem;
}


/* ============================================
   SELECTION / ACCESSIBILITY
============================================ */

::selection{
  background:var(--amber);
  color:#fff;
}

:focus-visible{
  outline:3px solid var(--amber);
  outline-offset:4px;
}


/* ============================================
   LAYOUT
============================================ */

.container{
  max-width:var(--max);
  margin:0 auto;
  padding:0 28px;
}

section{
  padding:96px 0;
}

.section-tight{
  padding:64px 0;
}

.bg-alt{
  background:var(--bg-alt);
}


/* ============================================
   SECTION HEADERS
============================================ */

.section-head{
  max-width:700px;
  margin-bottom:46px;
}

.section-head .kicker{
  color:var(--amber-deep);
  font-weight:650;
  font-size:.95rem;
  letter-spacing:.02em;
  margin-bottom:11px;
  display:block;
}

.section-head h2{
  font-size:clamp(1.9rem,3vw,2.55rem);
  margin-bottom:14px;
}

.section-head p{
  color:var(--ink-soft);
  font-size:1.05rem;
}

.eyebrow-note{
  display:inline-block;
  font-size:.9rem;
  font-weight:600;
  color:var(--teal-dark);
  background:var(--teal-pale);
  padding:7px 15px;
  border-radius:99px;
  margin-bottom:22px;
}


/* ============================================
   HEADER
============================================ */

header{
  position:sticky;
  top:0;
  z-index:50;

  background:rgba(255,255,255,.96);

  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);

  border-bottom:1px solid var(--line);

  box-shadow:
    0 2px 12px rgba(23,63,74,.05);
}

.nav-row{
  position:relative;

  display:flex;
  align-items:center;
  justify-content:space-between;

  padding:10px 15px;

  max-width:var(--max);
  margin:0 auto;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  text-decoration:none;
}

.brand-logo{
  height:55px;
  width:auto;
  display:block;
}

.brand-mark{
  width:30px;
  height:30px;
  flex:none;
}


/* ============================================
   MAIN NAVIGATION
============================================ */

nav.main-nav{
  display:flex;
  gap:25px;
  align-items:center;
}

nav.main-nav a{
  text-decoration:none;

  color:var(--ink-soft);

  font-size:1rem;
  font-weight:500;

  padding:7px 2px;

  border-bottom:2px solid transparent;

  transition:
    color .15s ease,
    border-color .15s ease,
    background .15s ease;
}

nav.main-nav a:hover,
nav.main-nav a.active{
  color:var(--teal-deep);
  border-color:var(--amber);
}


/* ============================================
   NAV CTA
============================================ */

nav.main-nav a.nav-cta{
  padding:11px 21px;

  border-bottom:none;

  border-radius:var(--radius-s);

  background:var(--amber);

  color:#fff;

  font-weight:650;

  margin-left:8px;

  box-shadow:
    0 4px 10px rgba(200,137,46,.18);
}

nav.main-nav a.nav-cta:hover{
  border-bottom:none;

  background:var(--amber-deep);

  color:#fff;

  transform:translateY(-1px);
}


/* ============================================
   BUTTONS
============================================ */

.btn{
  display:inline-flex;

  align-items:center;
  justify-content:center;
  gap:9px;

  font-family:'Source Sans 3',sans-serif;

  font-weight:650;
  font-size:1rem;

  min-height:46px;

  padding:12px 23px;

  border-radius:var(--radius-s);

  text-decoration:none;

  border:1px solid transparent;

  cursor:pointer;

  transition:
    transform .12s ease,
    background .15s ease,
    color .15s ease,
    border-color .15s ease,
    box-shadow .15s ease;
}

.btn:hover{
  transform:translateY(-1px);
}


/* Primary button */

.btn-amber{
  background:var(--amber);
  color:#fff;

  box-shadow:
    0 4px 12px rgba(200,137,46,.18);
}

.btn-amber:hover{
  background:var(--amber-deep);
  color:#fff;

  box-shadow:
    0 6px 16px rgba(169,109,31,.22);
}


/* Outline button */

.btn-outline{
  background:transparent;

  color:var(--teal-deep);

  border-color:var(--teal-deep);
}

.btn-outline:hover{
  background:var(--teal-deep);
  color:#fff;
}


/* Light button on dark sections */

.btn-ghost-light{
  background:transparent;

  color:#fff;

  border-color:rgba(255,255,255,.65);
}

.btn-ghost-light:hover{
  background:rgba(255,255,255,.13);

  color:#fff;

  border-color:#fff;
}


/* ============================================
   MOBILE MENU BUTTON
============================================ */

.menu-toggle{
  display:none;

  background:none;

  border:none;

  cursor:pointer;

  padding:8px;

  border-radius:6px;
}

.menu-toggle:hover{
  background:var(--teal-pale);
}

.menu-toggle span{
  display:block;

  width:25px;
  height:2px;

  background:var(--teal-deep);

  margin:5px 0;

  transition:
    transform .2s ease,
    opacity .2s ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1){
  transform:translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2){
  opacity:0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3){
  transform:translateY(-7px) rotate(-45deg);
}


/* ============================================
   GENERAL LINKS
============================================ */

a{
  transition:
    color .15s ease,
    background .15s ease;
}


/* ============================================
   FOOTER
============================================ */

footer{
  background:#17313B;

  color:#E4EBED;

  padding:60px 0 30px;
}

.footer-grid{
  display:grid;

  grid-template-columns:
    1.4fr
    1fr
    1fr
    1fr;

  gap:42px;

  margin-bottom:42px;
}

.footer-grid h5{
  color:#FFFFFF;

  font-family:'Source Sans 3',system-ui,sans-serif;

  font-size:.95rem;

  font-weight:650;

  letter-spacing:.03em;

  margin:0 0 16px;
}

.footer-grid ul{
  list-style:none;

  margin:0;

  padding:0;
}

.footer-grid li{
  margin-bottom:11px;

  font-size:.95rem;
}

.footer-grid a{
  text-decoration:none;

  color:#DCE7E9;
}

.footer-grid a:hover{
  color:#F1C77D;
}


/* ============================================
   FOOTER BOTTOM
============================================ */

.footer-bottom{
  border-top:1px solid rgba(255,255,255,.18);

  padding-top:23px;

  display:flex;

  justify-content:space-between;

  flex-wrap:wrap;

  gap:14px;

  font-size:.88rem;

  color:#B9C9CD;
}

.footer-brand{
  margin-bottom:16px;
}


/* ============================================
   SOCIAL LINKS
============================================ */

.social-links{
  display:flex;

  flex-direction:column;

  gap:14px;
}

.social-links a{
  display:flex;

  align-items:center;

  gap:10px;

  color:#E4EBED;

  text-decoration:none;

  font-size:.95rem;

  transition:
    color .2s ease,
    transform .2s ease;
}

.social-links a i{
  width:22px;

  font-size:18px;
}

.social-links a:hover{
  color:#F1C77D;

  transform:translateX(2px);
}


/* ============================================
   WHATSAPP FLOATING BUTTON
============================================ */

.float-cta{
  position:fixed;

  bottom:24px;
  right:24px;

  z-index:60;

  background:var(--success);

  color:#fff;

  border-radius:99px;

  padding:14px 21px;

  display:flex;

  align-items:center;

  gap:9px;

  text-decoration:none;

  font-size:.95rem;

  font-weight:650;

  box-shadow:
    0 8px 22px rgba(0,0,0,.18);

  transition:
    transform .15s ease,
    background .15s ease,
    box-shadow .15s ease;
}

.float-cta:hover{
  background:#3F694F;

  color:#fff;

  transform:translateY(-2px);

  box-shadow:
    0 10px 26px rgba(0,0,0,.22);
}

.float-cta svg{
  flex:none;
}


/* ============================================
   TABLES
============================================ */

table{
  width:100%;

  border-collapse:collapse;

  background:var(--paper);
}

th,
td{
  padding:13px 15px;

  text-align:left;

  border-bottom:1px solid var(--line);
}

th{
  color:var(--teal-deep);

  font-weight:650;

  background:var(--teal-pale);
}


/* ============================================
   FORM ELEMENTS
============================================ */

input,
textarea,
select{
  font-size:1rem;

  color:var(--ink);

  background:#fff;

  border:1px solid var(--line-dark);

  border-radius:var(--radius-s);

  padding:11px 13px;

  min-height:46px;
}

textarea{
  min-height:120px;
  resize:vertical;
}

input:focus,
textarea:focus,
select:focus{
  border-color:var(--teal);

  outline:3px solid rgba(23,107,120,.14);
}


/* ============================================
   CARDS
============================================ */

.card{
  background:var(--paper);

  border:1px solid var(--line);

  border-radius:var(--radius-m);

  box-shadow:
    0 4px 16px rgba(23,63,74,.05);
}


/* ============================================
   MOBILE / TABLET
============================================ */

@media (max-width:980px){

  nav.main-nav{
    display:none;

    position:absolute;

    top:100%;
    left:0;
    right:0;

    background:#fff;

    border-bottom:1px solid var(--line);

    flex-direction:column;

    align-items:flex-start;

    padding:20px 28px;

    gap:3px;

    box-shadow:
      0 12px 24px rgba(23,63,74,.10);
  }

  nav.main-nav.open{
    display:flex;
  }

  nav.main-nav a{
    padding:12px 0;

    width:100%;

    border-bottom:none;

    font-size:1.02rem;
  }

  nav.main-nav a:hover,
  nav.main-nav a.active{
    color:var(--teal-deep);

    border-bottom:none;
  }

  nav.main-nav a.nav-cta{
    margin-left:0;

    margin-top:10px;

    width:100%;

    text-align:center;

    padding:13px 20px;
  }

  .menu-toggle{
    display:block;
  }

  .footer-grid{
    grid-template-columns:
      1.2fr
      1fr
      1fr;

    gap:35px;
  }
}


/* ============================================
   MOBILE
============================================ */

@media (max-width:700px){

  body{
    font-size:16px;
  }

  .container{
    padding:0 20px;
  }

  section{
    padding:64px 0;
  }

  .section-tight{
    padding:48px 0;
  }

  .section-head{
    margin-bottom:34px;
  }

  .section-head p{
    font-size:1rem;
  }

  .nav-row{
    padding:9px 15px;
  }

  .brand-logo{
    height:49px;
  }

  .footer-grid{
    grid-template-columns:1fr 1fr;

    gap:32px 25px;
  }

  .footer-grid > :first-child{
    grid-column:1 / -1;
  }

  .footer-bottom{
    flex-direction:column;

    align-items:flex-start;
  }
}


/* ============================================
   SMALL MOBILE
============================================ */

@media (max-width:600px){

  .container{
    padding:0 18px;
  }

  section{
    padding:56px 0;
  }

  h1{
    font-size:2.15rem;
  }

  h2{
    font-size:1.85rem;
  }

  h3{
    font-size:1.45rem;
  }

  .btn{
    width:auto;

    min-height:48px;

    padding:12px 19px;
  }

  .float-cta span{
    display:none;
  }

  .float-cta{
    padding:14px;

    right:18px;
    bottom:18px;
  }

  .footer-grid{
    grid-template-columns:1fr;

    gap:28px;
  }

  .footer-grid > :first-child{
    grid-column:auto;
  }

  .footer-grid li{
    margin-bottom:9px;
  }
}


/* ============================================
   VERY SMALL DEVICES
============================================ */

@media (max-width:400px){

  body{
    font-size:16px;
  }

  .brand-logo{
    height:45px;
  }

  .container{
    padding:0 16px;
  }

  .btn{
    width:100%;
  }

  nav.main-nav a.nav-cta{
    width:100%;
  }
}


/* ============================================
   REDUCED MOTION
============================================ */

@media (prefers-reduced-motion:reduce){

  html{
    scroll-behavior:auto;
  }

  *,
  *::before,
  *::after{
    transition:none !important;

    animation:none !important;
  }
}


/* ============================================
   HIGH CONTRAST / ACCESSIBILITY SUPPORT
============================================ */

@media (prefers-contrast:more){

  body{
    color:#172B34;
  }

  nav.main-nav a{
    color:#243F48;
  }

  .section-head p{
    color:#354E57;
  }

  .footer-grid a{
    color:#FFFFFF;
  }

  .footer-bottom{
    color:#D6E1E4;
  }
}


/* ============================================
   PRINT
============================================ */

@media print{

  header{
    position:static;

    box-shadow:none;
  }

  .float-cta,
  .menu-toggle{
    display:none !important;
  }

  footer{
    background:#fff;

    color:#000;

    border-top:1px solid #ccc;
  }

  .footer-grid h5,
  .footer-grid a,
  .footer-bottom{
    color:#000;
  }
}