/* ============================================
       CSS VARIABLES & RESET
       Colour scheme matched to cosmetic-dentist-india.com
       White body · Dark charcoal nav/header · Orange CTA accent
    ============================================ */
    :root {
      --ivory:        #FFFFFF;        /* site body = pure white */
      --white:        #FFFFFF;
      --pearl:        #F5F5F5;        /* light grey alternating sections */
      --gold:         #E8660A;        /* site orange accent (phone-call-orange) */
      --gold-light:   #F4976A;        /* lighter orange tint */
      --gold-dark:    #C0500A;        /* darker orange for hover */
      --navy:         #1A1A2E;        /* site near-black charcoal nav/header */
      --navy-mid:     #2C2C44;        /* slightly lighter charcoal */
      --text-dark:    #1C1C1C;        /* body text black */
      --text-mid:     #444444;        /* paragraph text */
      --text-light:   #777777;        /* muted captions */
      --accent-blue:  #2563EB;
      --divider:      #E0E0E0;        /* light grey borders */
      --shadow:       0 4px 24px rgba(0,0,0,0.08);
      --shadow-lg:    0 8px 40px rgba(0,0,0,0.13);

      --font-display: 'Cormorant Garamond', Georgia, serif;
      --font-body:    'DM Sans', system-ui, sans-serif;
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    html { scroll-behavior: smooth; }

    body {
      font-family: var(--font-body);
      font-size: 16px;
      line-height: 1.7;
      color: var(--text-dark);
      background: var(--ivory);
    }

    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--gold-dark); text-decoration: none; }
    a:hover { color: var(--navy); }

    /* ============================================
       TYPOGRAPHY
    ============================================ */
    h1, h2, h3, h4 {
      font-family: var(--font-display);
      line-height: 1.2;
      color: var(--navy);
      font-weight: 600;
    }
    h1 { font-size: clamp(2.2rem, 4.5vw, 3.4rem); font-weight: 700; }
    h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 600; }
    h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); font-weight: 600; }
    h4 { font-size: 1.1rem; font-weight: 600; }

    p { margin-bottom: 1rem; color: var(--text-mid); }

    /* ============================================
       LAYOUT UTILITIES
    ============================================ */
    .container {
      max-width: 1080px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .section {
      padding: 72px 0;
    }
    .section-alt {
      background: var(--pearl);
    }
    .divider-gold {
      border: none;
      border-top: 2px solid var(--gold-light);
      margin: 56px 0;
    }

    /* ============================================
       TOP BAR & NAV
    ============================================ */
  

    /* ============================================
       HERO BANNER
    ============================================ */
    .hero {
      background: var(--navy);
      padding: 64px 0 60px;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(0,0,0,0.15);
    }
    .hero-inner {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero-eyebrow {
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--gold);
      margin-bottom: 14px;
    }
    .hero h1 {
      color: var(--white);
      margin-bottom: 18px;
    }
    .hero h1 em {
      font-style: italic;
      color: var(--gold-light);
    }
    .hero-sub {
      color: rgba(255,255,255,0.82);
      font-size: 1rem;
      margin-bottom: 28px;
    }
    .hero-ctas {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--gold);
      color: var(--white);
      padding: 12px 26px;
      border-radius: 3px;
      font-weight: 700;
      font-size: 0.9rem;
      letter-spacing: 0.02em;
      transition: background 0.2s, transform 0.15s;
      display: inline-block;
    }
    .btn-primary:hover {
      background: var(--gold-dark);
      color: var(--white);
      transform: translateY(-1px);
    }
    .btn-outline {
      border: 2px solid rgba(255,255,255,0.6);
      color: var(--white);
      padding: 10px 24px;
      border-radius: 3px;
      font-weight: 600;
      font-size: 0.9rem;
      transition: border-color 0.2s, background 0.2s;
      display: inline-block;
    }
    .btn-outline:hover {
      border-color: var(--gold);
      color: var(--gold-light);
      background: rgba(232,102,10,0.1);
    }
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      background: rgba(255,255,255,0.07);
      border: 1px solid rgba(232,102,10,0.35);
      border-radius: 6px;
      padding: 24px 16px;
    }
    .stat-item { text-align: center; }
    .stat-num {
      font-family: var(--font-display);
      font-size: 2.6rem;
      font-weight: 700;
      color: var(--gold);
      line-height: 1;
      display: block;
    }
    .stat-label {
      font-size: 0.78rem;
      color: rgba(255,255,255,0.65);
      margin-top: 6px;
      line-height: 1.3;
    }

    /* ============================================
       QUICK LINKS BAR
    ============================================ */
    .quicklinks {
      background: var(--pearl);
      border-bottom: 1px solid var(--divider);
      border-top: 3px solid var(--gold);
      padding: 12px 0;
    }
    .quicklinks-inner {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      align-items: center;
    }
    .quicklinks-label {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--navy);
      letter-spacing: 0.06em;
      text-transform: uppercase;
      margin-right: 6px;
    }
    .ql-link {
      font-size: 0.85rem;
      color: var(--navy);
      border: 1px solid var(--divider);
      border-radius: 3px;
      padding: 4px 12px;
      transition: all 0.2s;
      background: var(--white);
      font-weight: 500;
    }
    .ql-link:hover {
      background: var(--gold);
      color: var(--white);
      border-color: var(--gold);
    }

    /* ============================================
       INTRO SECTION
    ============================================ */
    .intro-grid {
      display: grid;
      grid-template-columns: 3fr 2fr;
      gap: 56px;
      align-items: start;
    }
    .intro-text h2 { margin-bottom: 20px; }
    .highlight-box {
      background: var(--navy);
      color: var(--white);
      border-radius: 4px;
      padding: 24px;
      position: sticky;
      top: 90px;
      border-top: 4px solid var(--gold);
    }
    .highlight-box h3 {
      color: var(--white);
      font-size: 1.1rem;
      margin-bottom: 16px;
      border-bottom: 1px solid rgba(232,102,10,0.4);
      padding-bottom: 12px;
    }
    .highlight-box ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .highlight-box li {
      font-size: 0.9rem;
      color: rgba(255,255,255,0.85);
      display: flex;
      gap: 10px;
      align-items: flex-start;
    }
    .highlight-box li::before {
      content: '✔';
      color: var(--gold);
      flex-shrink: 0;
      margin-top: 2px;
    }
    .highlight-box .contact-block {
      margin-top: 20px;
      border-top: 1px solid rgba(232,102,10,0.35);
      padding-top: 18px;
    }
    .highlight-box .contact-block p {
      color: rgba(255,255,255,0.6);
      font-size: 0.8rem;
      margin-bottom: 8px;
    }
    .highlight-box .phone-link {
      display: block;
      font-family: var(--font-display);
      font-size: 1.7rem;
      color: var(--gold);
      font-weight: 700;
    }
    .highlight-box .phone-link:hover { color: var(--white); }

    /* ============================================
       WHY CHOOSE / DIFFERENCE SECTION
    ============================================ */
    .diff-section h2 { margin-bottom: 10px; }
    .diff-section .sub-heading {
      color: var(--text-light);
      font-size: 1rem;
      margin-bottom: 44px;
    }
    .diff-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .diff-card {
      background: var(--white);
      border: 1px solid var(--divider);
      border-radius: 4px;
      padding: 24px 20px;
      border-top: 3px solid var(--gold);
      transition: box-shadow 0.2s, transform 0.2s;
    }
    .diff-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-2px);
    }
    .diff-card .icon {
      font-size: 1.8rem;
      margin-bottom: 12px;
    }
    .diff-card h4 {
      color: var(--navy);
      margin-bottom: 8px;
    }
    .diff-card p {
      font-size: 0.9rem;
      margin-bottom: 0;
    }

    /* ============================================
       TREATMENT OPTIONS
    ============================================ */
    .treatments-section h2 { margin-bottom: 10px; }
    .treatments-sub { color: var(--text-light); margin-bottom: 44px; }

    .treatment-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      margin-bottom: 28px;
    }
    .treatment-card {
      background: var(--white);
      border-radius: 4px;
      border: 1px solid var(--divider);
      overflow: hidden;
      transition: box-shadow 0.2s;
    }
    .treatment-card:hover { box-shadow: var(--shadow); }
    .treatment-card-header {
      background: var(--navy);
      padding: 16px 20px;
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 3px solid var(--gold);
    }
    .treatment-card-header .badge {
      background: var(--gold);
      color: var(--white);
      font-size: 0.7rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      padding: 3px 9px;
      border-radius: 2px;
      flex-shrink: 0;
    }
    .treatment-card-header h3 {
      color: var(--white);
      font-size: 1.1rem;
    }
    .treatment-card-body {
      padding: 24px;
    }
    .treatment-card-body p { font-size: 0.93rem; }
    .treatment-details {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-top: 16px;
    }
    .treatment-detail {
      display: flex;
      gap: 10px;
      font-size: 0.88rem;
      color: var(--text-mid);
    }
    .treatment-detail strong {
      color: var(--navy);
      min-width: 72px;
    }
    .treatment-ideal {
      background: var(--pearl);
      border-radius: 6px;
      padding: 12px 16px;
      font-size: 0.85rem;
      color: var(--text-mid);
      margin-top: 16px;
    }
    .treatment-ideal strong { color: var(--navy-mid); }

    /* ============================================
       PROCESS STEPS
    ============================================ */
    .process-section h2 { margin-bottom: 10px; }
    .process-intro { color: var(--text-light); margin-bottom: 44px; }

    .steps-list { display: flex; flex-direction: column; gap: 0; }
    .step-item {
      display: grid;
      grid-template-columns: 72px 1fr;
      gap: 28px;
      padding: 32px 0;
      border-bottom: 1px solid var(--divider);
      align-items: start;
    }
    .step-item:last-child { border-bottom: none; }
    .step-num {
      font-family: var(--font-display);
      font-size: 3.4rem;
      font-weight: 700;
      color: var(--gold);
      line-height: 1;
      text-align: center;
    }
    .step-content h3 { color: var(--navy); margin-bottom: 10px; }
    .step-content p { font-size: 0.94rem; margin-bottom: 10px; }
    .step-bullets {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-top: 10px;
    }
    .step-bullets li {
      font-size: 0.9rem;
      color: var(--text-mid);
      padding-left: 18px;
      position: relative;
    }
    .step-bullets li::before {
      content: '→';
      position: absolute;
      left: 0;
      color: var(--gold);
    }

    /* ============================================
       CAUSES OF DISCOLOURATION
    ============================================ */
    .causes-section h2 { margin-bottom: 10px; }
    .causes-sub { color: var(--text-light); margin-bottom: 40px; }
    .causes-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
    }
    .cause-card {
      background: var(--white);
      border-radius: 4px;
      padding: 18px;
      border-left: 3px solid var(--gold);
      border: 1px solid var(--divider);
      border-left: 4px solid var(--gold);
    }
    .cause-card h4 { margin-bottom: 6px; font-size: 0.95rem; color: var(--navy); }
    .cause-card p { font-size: 0.87rem; margin-bottom: 0; }

    /* ============================================
       BEFORE & AFTER (placeholder design)
    ============================================ */
    .before-after-section h2 { margin-bottom: 10px; }
    .ba-intro { color: var(--text-light); margin-bottom: 40px; }
    .ba-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .ba-card {
      background: var(--white);
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid var(--divider);
      box-shadow: var(--shadow);
    }
    .ba-placeholder {
      height: 180px;
      background: linear-gradient(135deg, var(--pearl) 0%, var(--divider) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 8px;
      color: var(--text-light);
      font-size: 0.85rem;
    }
    .ba-placeholder .ba-icon { font-size: 2rem; }
    .ba-label {
      padding: 14px 16px;
      font-size: 0.88rem;
      color: var(--text-mid);
      font-weight: 500;
      border-top: 1px solid var(--divider);
    }
    .ba-shades {
      display: flex;
      gap: 6px;
      margin-top: 8px;
      flex-wrap: wrap;
    }
    .shade-pill {
      font-size: 0.75rem;
      background: var(--navy);
      color: var(--gold);
      border-radius: 2px;
      padding: 2px 8px;
      font-weight: 700;
    }

    /* ============================================
       FAQ SECTION
    ============================================ */
    .faq-section h2 { margin-bottom: 10px; }
    .faq-intro { color: var(--text-light); margin-bottom: 40px; }
    .faq-list { display: flex; flex-direction: column; gap: 12px; }
    .faq-item {
      background: var(--white);
      border: 1px solid var(--divider);
      border-radius: 8px;
      overflow: hidden;
    }
    .faq-q {
      width: 100%;
      background: none;
      border: none;
      padding: 20px 24px;
      text-align: left;
      font-family: var(--font-body);
      font-size: 0.98rem;
      font-weight: 600;
      color: var(--navy);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }
    .faq-q:hover { background: var(--pearl); }
    .faq-toggle {
      font-size: 1.3rem;
      color: var(--gold);
      flex-shrink: 0;
      transition: transform 0.25s;
    }
    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }
    .faq-a-inner {
      padding: 0 24px 20px;
      font-size: 0.93rem;
      color: var(--text-mid);
      border-top: 1px solid var(--divider);
      padding-top: 16px;
    }
    .faq-item.open .faq-a { max-height: 400px; }
    .faq-item.open .faq-toggle { transform: rotate(45deg); }

    /* ============================================
       COST TABLE
    ============================================ */
    .cost-section h2 { margin-bottom: 10px; }
    .cost-intro { color: var(--text-light); margin-bottom: 40px; }
    .cost-table-wrap {
      background: var(--white);
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid var(--divider);
      box-shadow: var(--shadow);
    }
    table { width: 100%; border-collapse: collapse; }
    thead { background: var(--navy); }
    thead th {
      font-family: var(--font-body);
      font-weight: 600;
      font-size: 0.88rem;
      color: var(--gold-light);
      letter-spacing: 0.06em;
      text-transform: uppercase;
      padding: 16px 20px;
      text-align: left;
    }
    tbody tr { border-bottom: 1px solid var(--divider); }
    tbody tr:last-child { border-bottom: none; }
    tbody tr:nth-child(even) { background: var(--pearl); }
    tbody td {
      padding: 14px 20px;
      font-size: 0.93rem;
      color: var(--text-mid);
    }
    tbody td:first-child { color: var(--navy); font-weight: 500; }
    tbody td:last-child { color: var(--gold-dark); font-weight: 600; }
    .cost-note {
      margin-top: 16px;
      font-size: 0.85rem;
      color: var(--text-light);
      font-style: italic;
    }

    /* ============================================
       SERVICES CROSSLINKS
    ============================================ */
    .related-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .related-card {
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid var(--divider);
      background: var(--white);
      transition: box-shadow 0.2s;
    }
    .related-card:hover { box-shadow: var(--shadow-lg); }
    .related-img-placeholder {
      height: 140px;
      background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 3rem;
    }
    .related-body { padding: 20px; }
    .related-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
    .related-body p { font-size: 0.88rem; margin-bottom: 14px; }
    .related-link {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--gold-dark);
      border-bottom: 1px solid var(--gold-light);
      padding-bottom: 2px;
      transition: border-color 0.2s;
    }
    .related-link:hover { border-color: var(--navy); color: var(--navy); }

    /* ============================================
       CTA BANNER
    ============================================ */
    .cta-banner {
      background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 100%);
      padding: 64px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .cta-banner::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at center, rgba(200,169,110,0.15) 0%, transparent 65%);
    }
    .cta-banner-inner { position: relative; z-index: 1; }
    .cta-banner .cta-icon { font-size: 2.5rem; margin-bottom: 16px; }
    .cta-banner h2 { color: var(--white); margin-bottom: 12px; }
    .cta-banner p { color: rgba(255,255,255,0.75); max-width: 540px; margin: 0 auto 32px; }
    .cta-ways {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-top: 12px;
    }
    .cta-way {
      text-align: center;
      background: rgba(255,255,255,0.07);
      border: 1px solid rgba(200,169,110,0.25);
      border-radius: 8px;
      padding: 16px 24px;
      min-width: 180px;
    }
    .cta-way .cta-way-label {
      font-size: 0.78rem;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--gold);
      margin-bottom: 6px;
    }
    .cta-way .cta-way-val {
      font-size: 1rem;
      font-weight: 600;
      color: var(--white);
    }
    .cta-way a { color: var(--white); }

    /* ============================================
       FOOTER
    ============================================ */
    footer {
      background: #111827;
      color: rgba(255,255,255,0.65);
      padding: 48px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand .brand-name {
      font-family: var(--font-display);
      font-size: 1.5rem;
      color: var(--white);
      margin-bottom: 10px;
    }
    .footer-brand p { font-size: 0.88rem; line-height: 1.6; }
    .footer-col h5 {
      color: var(--gold-light);
      font-size: 0.8rem;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      margin-bottom: 14px;
    }
    .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
    .footer-col ul a { font-size: 0.88rem; color: rgba(255,255,255,0.6); transition: color 0.2s; }
    .footer-col ul a:hover { color: var(--gold-light); }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
    }

    /* ============================================
       RESPONSIVE
    ============================================ */
    @media (max-width: 900px) {
      .hero-inner { grid-template-columns: 1fr; }
      .intro-grid { grid-template-columns: 1fr; }
      .highlight-box { position: static; }
      .diff-grid { grid-template-columns: 1fr 1fr; }
      .treatment-block { grid-template-columns: 1fr; }
      .causes-grid { grid-template-columns: 1fr 1fr; }
      .ba-grid { grid-template-columns: 1fr 1fr; }
      .related-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 600px) {
      .diff-grid { grid-template-columns: 1fr; }
      .causes-grid { grid-template-columns: 1fr; }
      .ba-grid { grid-template-columns: 1fr; }
      .hero-stats { grid-template-columns: 1fr; }
      .nav-links { display: none; }
      .footer-grid { grid-template-columns: 1fr; }
    }