:root {
      --primary:       #1565C0;
      --primary-dark:  #0D47A1;
      --soft-blue:     #E3F2FD;
      --accent-blue:   #42A5F5;
      --mid-blue:      #90CAF9;
      --white:         #FFFFFF;
      --off-white:     #F8FBFF;
      --text-dark:     #0D2137;
      --text-mid:      #3D5A73;
      --text-light:    #6B8FA8;
      --border:        #D6E9F8;
    }

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

    body {
      font-family: 'DM Sans', sans-serif;
      color: var(--text-dark);
      background: var(--white);
      overflow-x: hidden;
    }

    h1, h2, h3 { font-family: 'Playfair Display', serif; }

    /* ── NAVBAR ─────────────────────────────────────── */
    .navbar {
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      padding: 14px 0;
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 2px 20px rgba(21,101,192,.07);
    }

    .navbar-brand {
      font-family: 'Playfair Display', serif;
      font-size: 1.55rem;
      font-weight: 700;
      color: var(--primary) !important;
      letter-spacing: -0.3px;
    }

    .navbar-brand span { color: var(--accent-blue); }

    .nav-link {
      font-size: .9rem;
      font-weight: 500;
      color: var(--text-mid) !important;
      padding: 8px 16px !important;
      border-radius: 6px;
      transition: all .25s;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
      background: var(--soft-blue);
    }

    .btn-nav-login {
      border: 1.5px solid var(--primary);
      color: var(--primary) !important;
      border-radius: 8px !important;
      padding: 7px 20px !important;
    }

    .btn-nav-login:hover { background: var(--soft-blue) !important; }

    .btn-nav-signup {
      background: var(--primary) !important;
      color: var(--white) !important;
      border-radius: 8px !important;
      padding: 7px 20px !important;
      border: none;
    }

    .btn-nav-signup:hover { background: var(--primary-dark) !important; }

    /* ── HERO ────────────────────────────────────────── */
    .hero {
      min-height: 92vh;
      background:
        linear-gradient(135deg, rgba(13,71,161,.78) 0%, rgba(21,101,192,.55) 55%, rgba(66,165,245,.3) 100%),
        url('https://images.unsplash.com/photo-1631815588090-d4bfec5b1ccb?w=1600&q=80&fit=crop') center/cover no-repeat;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
    }

    .hero::after {
      content: '';
      position: absolute;
      bottom: -2px; left: 0; right: 0;
      height: 80px;
      background: var(--white);
      clip-path: ellipse(55% 100% at 50% 100%);
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255,255,255,.18);
      border: 1px solid rgba(255,255,255,.35);
      color: #fff;
      font-size: .8rem;
      font-weight: 500;
      letter-spacing: .5px;
      padding: 7px 16px;
      border-radius: 50px;
      margin-bottom: 24px;
      backdrop-filter: blur(6px);
    }

    .hero-badge i { color: var(--mid-blue); font-size: .75rem; }

    .hero h1 {
      font-size: clamp(2.4rem, 5vw, 4rem);
      color: #fff;
      line-height: 1.18;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .hero h1 em {
      font-style: normal;
      color: var(--mid-blue);
      display: block;
    }

    .hero p {
      font-size: 1.1rem;
      color: rgba(255,255,255,.88);
      max-width: 500px;
      line-height: 1.7;
      margin-bottom: 36px;
    }

    .btn-hero-primary {
      background: #fff;
      color: var(--primary);
      font-weight: 600;
      font-size: .95rem;
      padding: 14px 32px;
      border-radius: 50px;
      border: none;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      transition: all .3s;
      box-shadow: 0 8px 30px rgba(0,0,0,.18);
    }

    .btn-hero-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 40px rgba(0,0,0,.25);
      color: var(--primary-dark);
    }

    .btn-hero-secondary {
      background: transparent;
      color: #fff;
      font-weight: 500;
      font-size: .95rem;
      padding: 13px 28px;
      border-radius: 50px;
      border: 1.5px solid rgba(255,255,255,.5);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      transition: all .3s;
    }

    .btn-hero-secondary:hover {
      border-color: #fff;
      background: rgba(255,255,255,.12);
      color: #fff;
    }

    .hero-stats {
      display: flex;
      gap: 36px;
      margin-top: 52px;
    }

    .hero-stat-num {
      font-family: 'Playfair Display', serif;
      font-size: 1.9rem;
      font-weight: 700;
      color: #fff;
      line-height: 1;
    }

    .hero-stat-label {
      font-size: .78rem;
      color: rgba(255,255,255,.7);
      margin-top: 4px;
      letter-spacing: .3px;
    }

    /* ── SECTION TITLES ─────────────────────────────── */
    .section-label {
      display: inline-block;
      font-size: .75rem;
      font-weight: 600;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--primary);
      background: var(--soft-blue);
      padding: 5px 14px;
      border-radius: 50px;
      margin-bottom: 14px;
    }

    .section-title {
      font-size: clamp(1.8rem, 3.5vw, 2.6rem);
      color: var(--text-dark);
      line-height: 1.25;
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-light);
      max-width: 540px;
      line-height: 1.7;
    }

    /* ── DISEASES ────────────────────────────────────── */
    .diseases-section {
      padding: 100px 0;
      background: var(--off-white);
    }

    .disease-card {
      background: var(--white);
      border-radius: 18px;
      border: 1px solid var(--border);
      padding: 32px 26px;
      text-align: center;
      transition: all .3s;
      height: 100%;
      position: relative;
      overflow: hidden;
    }

    .disease-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent-blue));
      opacity: 0;
      transition: opacity .3s;
    }

    .disease-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 50px rgba(21,101,192,.12);
      border-color: var(--accent-blue);
    }

    .disease-card:hover::before { opacity: 1; }

    .disease-icon {
      width: 64px;
      height: 64px;
      border-radius: 16px;
      background: var(--soft-blue);
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      font-size: 1.6rem;
      color: var(--primary);
      transition: all .3s;
    }

    .disease-card:hover .disease-icon {
      background: var(--primary);
      color: #fff;
    }

    .disease-card h5 {
      font-family: 'Playfair Display', serif;
      font-size: 1.1rem;
      color: var(--text-dark);
      margin-bottom: 10px;
    }

    .disease-card p {
      font-size: .875rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    .disease-tag {
      display: inline-block;
      font-size: .72rem;
      font-weight: 600;
      letter-spacing: .5px;
      color: var(--primary);
      background: var(--soft-blue);
      padding: 3px 10px;
      border-radius: 50px;
      margin-top: 14px;
    }

    /* ── REGISTER DERMATOLOGIST ──────────────────────── */
    .register-section {
      padding: 100px 0;
      background: var(--white);
    }

    .register-visual {
      border-radius: 24px;
      overflow: hidden;
      position: relative;
      height: 480px;
    }

    .register-visual img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .register-visual-badge {
      position: absolute;
      bottom: 28px;
      left: 28px;
      background: rgba(255,255,255,.95);
      border-radius: 14px;
      padding: 16px 20px;
      display: flex;
      align-items: center;
      gap: 14px;
      box-shadow: 0 10px 40px rgba(0,0,0,.12);
      backdrop-filter: blur(6px);
    }

    .register-visual-badge .icon {
      width: 46px;
      height: 46px;
      background: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.1rem;
      flex-shrink: 0;
    }

    .register-visual-badge .text strong {
      display: block;
      font-size: .9rem;
      color: var(--text-dark);
      font-weight: 600;
    }

    .register-visual-badge .text span {
      font-size: .78rem;
      color: var(--text-light);
    }

    .register-content { padding: 20px 0 20px 48px; }

    .benefit-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 22px;
    }

    .benefit-icon {
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background: var(--soft-blue);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: .95rem;
      flex-shrink: 0;
    }

    .benefit-item h6 {
      font-size: .95rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 3px;
    }

    .benefit-item p {
      font-size: .85rem;
      color: var(--text-light);
      line-height: 1.5;
    }

    .btn-register {
      background: linear-gradient(135deg, var(--primary), var(--accent-blue));
      color: #fff;
      font-weight: 600;
      font-size: 1rem;
      padding: 15px 36px;
      border-radius: 50px;
      border: none;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      transition: all .3s;
      box-shadow: 0 8px 28px rgba(21,101,192,.3);
    }

    .btn-register:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 40px rgba(21,101,192,.4);
      color: #fff;
    }

    /* ── REVIEWS ─────────────────────────────────────── */
    .reviews-section {
      padding: 100px 0;
      background: linear-gradient(160deg, var(--soft-blue) 0%, var(--off-white) 100%);
    }

    .review-card {
      background: var(--white);
      border-radius: 20px;
      padding: 32px 28px;
      border: 1px solid var(--border);
      height: 100%;
      transition: all .3s;
      position: relative;
    }

    .review-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 50px rgba(21,101,192,.1);
    }

    .review-quote {
      font-size: 2.5rem;
      color: var(--mid-blue);
      line-height: 1;
      font-family: Georgia, serif;
      margin-bottom: 6px;
    }

    .review-text {
      font-size: .93rem;
      color: var(--text-mid);
      line-height: 1.75;
      margin-bottom: 24px;
    }

    .review-stars { color: #FFB300; font-size: .85rem; margin-bottom: 16px; }

    .reviewer-avatar {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      object-fit: cover;
      margin-right: 12px;
    }

    .reviewer-name {
      font-weight: 600;
      font-size: .9rem;
      color: var(--text-dark);
    }

    .reviewer-info {
      font-size: .78rem;
      color: var(--text-light);
    }

    .review-featured {
      background: linear-gradient(135deg, var(--primary) 0%, #1976D2 100%);
      color: #fff;
      border-color: transparent;
    }

    .review-featured .review-quote { color: rgba(255,255,255,.4); }
    .review-featured .review-text  { color: rgba(255,255,255,.88); }
    .review-featured .reviewer-name { color: #fff; }
    .review-featured .reviewer-info { color: rgba(255,255,255,.65); }

    /* ── DERMATOLOGISTS SECTION ─────────────────────── */
    .doctors-section {
      padding: 100px 0;
      background: var(--off-white);
    }

    .doctors-header {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 18px;
      align-items: center;
      margin-bottom: 42px;
    }

    .doctors-header h2 {
      margin: 0;
      font-size: clamp(2rem, 3vw, 2.6rem);
      color: var(--text-dark);
      line-height: 1.1;
    }

    .search-input {
      max-width: 420px;
      width: 100%;
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 14px 18px;
      font-size: .95rem;
      color: var(--text-dark);
      background: #fff;
    }

    .doctor-card {
      background: var(--white);
      border-radius: 24px;
      border: 1px solid var(--border);
      padding: 30px;
      transition: all .3s;
      position: relative;
      overflow: hidden;
      height: 100%;
    }

    .doctor-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 26px 60px rgba(21,101,192,.12);
      border-color: var(--accent-blue);
    }

    .doctor-avatar {
      width: 80px;
      height: 80px;
      border-radius: 22px;
      object-fit: cover;
      margin-bottom: 18px;
    }

    .doctor-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin: 14px 0 18px;
      color: var(--text-light);
      font-size: .88rem;
    }

    .doctor-meta span {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 12px;
      border-radius: 999px;
      background: var(--off-white);
    }

    .doctor-card h5 {
      font-family: 'Playfair Display', serif;
      font-size: 1.25rem;
      margin-bottom: 6px;
      color: var(--text-dark);
    }

    .doctor-card p {
      color: var(--text-light);
      line-height: 1.75;
      margin-bottom: 20px;
    }

    .doctor-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 20px;
    }

    .doctor-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: .78rem;
      color: var(--primary);
      background: var(--soft-blue);
      padding: 7px 12px;
      border-radius: 999px;
      font-weight: 600;
    }

    .btn-doctor {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: linear-gradient(135deg, var(--primary), var(--accent-blue));
      color: #fff;
      padding: 14px 26px;
      border-radius: 50px;
      border: none;
      text-decoration: none;
      font-weight: 600;
      transition: all .3s;
    }

    .btn-doctor:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 35px rgba(21,101,192,.25);
    }

    .no-results {
      text-align: center;
      color: var(--text-mid);
      padding: 40px 0;
    }

    /* ── FOOTER ─────────────────────────────────────── */
    footer {
      background: var(--text-dark);
      color: rgba(255,255,255,.75);
      padding: 72px 0 0;
    }

    .footer-brand {
      font-family: 'Playfair Display', serif;
      font-size: 1.6rem;
      font-weight: 700;
      color: #fff;
    }

    .footer-brand span { color: var(--accent-blue); }

    .footer-desc {
      font-size: .875rem;
      line-height: 1.75;
      color: rgba(255,255,255,.55);
      margin-top: 14px;
      max-width: 300px;
    }

    .footer-social a {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: rgba(255,255,255,.08);
      color: rgba(255,255,255,.65);
      text-decoration: none;
      font-size: .9rem;
      transition: all .25s;
      margin-right: 8px;
    }

    .footer-social a:hover {
      background: var(--primary);
      color: #fff;
    }

    .footer-heading {
      font-size: .8rem;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: rgba(255,255,255,.45);
      margin-bottom: 20px;
    }

    .footer-links { list-style: none; padding: 0; }

    .footer-links li { margin-bottom: 10px; }

    .footer-links a {
      font-size: .875rem;
      color: rgba(255,255,255,.6);
      text-decoration: none;
      transition: color .2s;
    }

    .footer-links a:hover { color: var(--accent-blue); }

    .footer-contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
      font-size: .875rem;
      color: rgba(255,255,255,.6);
    }

    .footer-contact-item i {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: rgba(66,165,245,.15);
      color: var(--accent-blue);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: .8rem;
      flex-shrink: 0;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,.08);
      padding: 22px 0;
      margin-top: 56px;
    }

    .footer-bottom p {
      font-size: .82rem;
      color: rgba(255,255,255,.35);
    }

    /* ── UTILITIES ───────────────────────────────────── */
    .divider-dot {
      width: 6px; height: 6px;
      background: var(--accent-blue);
      border-radius: 50%;
      display: inline-block;
    }

    .contact-section {
      padding: 100px 0;
      background: var(--off-white);
    }

    .contact-card,
    .contact-info-card {
      background: var(--white);
      border-radius: 24px;
      border: 1px solid var(--border);
      padding: 32px;
      box-shadow: 0 20px 50px rgba(21,101,192,.08);
    }

    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 20px;
    }

    .contact-info-item i {
      width: 48px;
      height: 48px;
      border-radius: 16px;
      background: var(--soft-blue);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      flex-shrink: 0;
    }

    .contact-card h3 {
      margin-bottom: 18px;
      font-family: 'Playfair Display', serif;
      font-size: 1.8rem;
      color: var(--text-dark);
    }

    .contact-card p,
    .contact-info-card p {
      color: var(--text-light);
      line-height: 1.75;
    }

    .contact-form .form-control {
      border-radius: 16px;
      border: 1px solid var(--border);
      padding: 18px 16px;
      box-shadow: none;
      height: auto;
    }

    .contact-form textarea.form-control {
      min-height: 160px;
    }

    .contact-form label {
      font-weight: 600;
      color: var(--text-dark);
    }

    .contact-details-note {
      font-size: .9rem;
      color: var(--text-mid);
      margin-top: 18px;
    }

    .appointment-section {
      padding: 100px 0;
      background: var(--soft-blue);
    }

    .booking-card {
      background: var(--white);
      border-radius: 24px;
      border: 1px solid var(--border);
      padding: 34px;
      box-shadow: 0 28px 70px rgba(21,101,192,.12);
    }

    .booking-card h2,
    .booking-card h3 {
      color: var(--text-dark);
      margin-bottom: 18px;
      font-family: 'Playfair Display', serif;
    }

    .booking-info {
      margin-bottom: 24px;
    }

    .booking-info p {
      color: var(--text-mid);
      line-height: 1.8;
    }

    .booking-badge {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 12px 16px;
      border-radius: 14px;
      background: var(--soft-blue);
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 18px;
    }

    .booking-doctor-card {
      display: flex;
      gap: 18px;
      align-items: center;
      margin-bottom: 28px;
    }

    .booking-doctor-avatar {
      width: 96px;
      height: 96px;
      border-radius: 22px;
      object-fit: cover;
      box-shadow: 0 18px 40px rgba(21,101,192,.12);
    }

    .booking-doctor-meta {
      display: grid;
      gap: 6px;
    }

    .booking-doctor-meta strong {
      font-size: 1.05rem;
      display: block;
      color: var(--text-dark);
    }

    .booking-note {
      font-size: .92rem;
      color: var(--text-mid);
      margin-top: 16px;
    }

    @media (max-width: 768px) {
      .register-content { padding: 40px 0 0; }
      .hero-stats { gap: 24px; }
      .register-visual { height: 320px; }
    }