/* ==========================================================================
   Riverside Dental Studio — Stylesheet
   Teal / white premium cosmetic dentistry theme
   ========================================================================== */

:root {
  --teal-dark: #0b5f60;
  --teal: #0f8a8a;
  --teal-mid: #14a3a0;
  --teal-light: #e6f6f5;
  --teal-pale: #f4fbfb;
  --gold-accent: #c9a15a;
  --white: #ffffff;
  --off-white: #fbfdfd;
  --ink: #16302f;
  --ink-soft: #4a615f;
  --border: #dcece9;
  --shadow: 0 10px 30px rgba(11, 95, 96, 0.10);
  --shadow-sm: 0 4px 12px rgba(11, 95, 96, 0.08);
  --radius: 14px;
  --radius-sm: 8px;
  --max-width: 1160px;
  --font-heading: "Poppins", "Segoe UI", Helvetica, Arial, sans-serif;
  --font-body: "Inter", "Segoe UI", Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background-color: var(--off-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--teal-dark);
  line-height: 1.2;
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
  color: var(--ink-soft);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 100px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background-color: var(--teal);
  color: var(--white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--teal-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--white);
  color: var(--white);
}

.btn-outline:hover {
  background-color: var(--white);
  color: var(--teal-dark);
  transform: translateY(-2px);
}

.btn-outline-teal {
  background-color: transparent;
  border-color: var(--teal);
  color: var(--teal-dark);
}

.btn-outline-teal:hover {
  background-color: var(--teal);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
  text-align: center;
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--teal-dark);
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal) 0%, var(--teal-dark) 100%);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  flex-shrink: 0;
}

.brand-text .brand-sub {
  display: block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal-mid);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--ink);
  position: relative;
  padding: 4px 0;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--teal);
}

.nav-links a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background-color: var(--teal);
  border-radius: 2px;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-phone {
  display: none;
  font-weight: 600;
  color: var(--teal-dark);
  font-size: 0.92rem;
}

.nav-toggle {
  display: none;
}

@media (min-width: 720px) {
  .nav-phone {
    display: inline;
  }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background: linear-gradient(120deg, var(--teal-dark) 0%, var(--teal) 55%, var(--teal-mid) 100%);
  color: var(--white);
  overflow: hidden;
  padding: 100px 0 110px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 85% 20%, rgba(255, 255, 255, 0.14), transparent 45%),
    radial-gradient(circle at 10% 90%, rgba(255, 255, 255, 0.10), transparent 40%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--teal-light);
  background-color: rgba(255, 255, 255, 0.14);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.hero h1 {
  color: var(--white);
  font-size: clamp(2.3rem, 4.2vw, 3.4rem);
  margin-bottom: 20px;
}

.hero p.lead {
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.1rem;
  max-width: 480px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.hero-stat strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--white);
}

.hero-stat span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.75);
}

.hero-visual {
  position: relative;
  background-color: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(4px);
}

.hero-visual img {
  border-radius: var(--radius-sm);
  width: 100%;
}

.hero-visual-caption {
  margin-top: 16px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
}

/* ---------- Section headings ---------- */

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 52px;
}

.section-eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--teal);
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
}

.section-head p {
  font-size: 1.05rem;
}

.bg-light {
  background-color: var(--teal-pale);
}

/* ---------- Service cards ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--teal-light);
  color: var(--teal-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.service-card a.card-link {
  display: inline-block;
  margin-top: 10px;
  font-weight: 600;
  color: var(--teal);
  font-size: 0.92rem;
}

.service-card a.card-link:hover {
  color: var(--teal-dark);
}

/* ---------- Gallery ---------- */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.gallery-item {
  background-color: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.ba-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.ba-panel {
  position: relative;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white);
}

.ba-panel.before {
  background: repeating-linear-gradient(135deg, #9db8b6, #9db8b6 10px, #8fa9a7 10px, #8fa9a7 20px);
}

.ba-panel.after {
  background: repeating-linear-gradient(135deg, var(--teal), var(--teal) 10px, var(--teal-mid) 10px, var(--teal-mid) 20px);
}

.ba-panel span {
  background-color: rgba(11, 95, 96, 0.55);
  padding: 6px 14px;
  border-radius: 100px;
}

.gallery-caption {
  padding: 16px 18px;
  font-size: 0.92rem;
  color: var(--ink-soft);
  font-weight: 500;
}

/* ---------- Testimonial ---------- */

.testimonial {
  background: linear-gradient(120deg, var(--teal-dark), var(--teal));
  color: var(--white);
  border-radius: var(--radius);
  padding: 56px;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  box-shadow: var(--shadow);
}

.testimonial .stars {
  color: var(--gold-accent);
  font-size: 1.2rem;
  letter-spacing: 4px;
  margin-bottom: 20px;
}

.testimonial blockquote {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 500;
  line-height: 1.5;
  margin: 0 0 24px;
}

.testimonial cite {
  font-style: normal;
  font-weight: 600;
  color: var(--teal-light);
  display: block;
}

.testimonial .role {
  font-weight: 400;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
}

/* ---------- Contact CTA band ---------- */

.cta-band {
  background-color: var(--teal-dark);
  color: var(--white);
  border-radius: var(--radius);
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-band h2 {
  color: var(--white);
  margin-bottom: 8px;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 0;
}

.cta-band-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ---------- Services page ---------- */

.services-list {
  display: grid;
  gap: 28px;
}

.service-row {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 24px;
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.service-row .service-icon {
  margin-bottom: 0;
}

.service-row h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.service-row ul {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--ink-soft);
}

.service-row li {
  margin-bottom: 6px;
}

.page-hero {
  background: linear-gradient(120deg, var(--teal-dark), var(--teal));
  color: var(--white);
  padding: 70px 0;
  text-align: center;
}

.page-hero h1 {
  color: var(--white);
  margin-bottom: 12px;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 560px;
  margin: 0 auto;
}

.breadcrumb {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 18px;
}

.breadcrumb a {
  color: var(--white);
  font-weight: 600;
}

/* ---------- Appointment page ---------- */

.appointment-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 44px;
  align-items: start;
}

.form-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.form-card h2 {
  margin-bottom: 8px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 28px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field.full {
  grid-column: 1 / -1;
}

.form-field label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--teal-dark);
}

.form-field input,
.form-field select,
.form-field textarea {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink);
  background-color: var(--off-white);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(15, 138, 138, 0.15);
  background-color: var(--white);
}

.form-note {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-top: 16px;
}

.info-card {
  background-color: var(--teal-dark);
  color: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

.info-card h3 {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.info-block {
  margin-bottom: 28px;
}

.info-block:last-child {
  margin-bottom: 0;
}

.info-block p,
.info-block a {
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 4px;
}

.info-block a:hover {
  color: var(--white);
  text-decoration: underline;
}

.hours-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 6px;
}

.hours-table td {
  padding: 6px 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.92rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.hours-table td:last-child {
  text-align: right;
  font-weight: 600;
  color: var(--white);
}

.map-embed {
  margin-top: 22px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  aspect-ratio: 16 / 10;
  background: repeating-linear-gradient(45deg, rgba(255,255,255,0.08), rgba(255,255,255,0.08) 10px, rgba(255,255,255,0.03) 10px, rgba(255,255,255,0.03) 20px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.75);
  text-align: center;
  padding: 20px;
}

/* ---------- Footer ---------- */

.site-footer {
  background-color: #0a3d3e;
  color: rgba(255, 255, 255, 0.75);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-grid h4 {
  color: var(--white);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.footer-brand .brand {
  color: var(--white);
  margin-bottom: 14px;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.footer-grid a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.92rem;
}

.footer-grid a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: 1fr 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }

  .appointment-layout {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .nav-links {
    display: none;
  }

  section {
    padding: 60px 0;
  }

  .card-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .cta-band {
    flex-direction: column;
    text-align: center;
    justify-content: center;
    padding: 40px 28px;
  }

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

  .testimonial {
    padding: 36px 24px;
  }

  .service-row {
    grid-template-columns: 1fr;
  }
}