/* ============================================================
   Diamond Dental Implant Studio – Global Styles
   Theme: Deep Navy + Geometric Gold
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Inter:wght@300;400;500;600;700&display=swap');

/* ── Design Tokens ── */
:root {
  --navy-deep:   #0a1628;
  --navy-mid:    #0f2044;
  --navy-light:  #162d5a;
  --gold-bright: #d4a847;
  --gold-mid:    #c49a35;
  --gold-light:  #f0c866;
  --gold-pale:   #fdf3d7;
  --white:       #ffffff;
  --off-white:   #f5f7fa;
  --text-muted:  #8a9bbf;
  --text-body:   #cdd5e5;
  --card-bg:     rgba(15, 32, 68, 0.8);
  --border-gold: rgba(212, 168, 71, 0.3);
  --shadow-gold: 0 8px 40px rgba(212, 168, 71, 0.15);

  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;

  --radius-sm:  8px;
  --radius-md:  16px;
  --radius-lg:  24px;
  --radius-xl:  40px;

  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: 0.2s ease;
}

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

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

body {
  font-family: var(--font-body);
  background: var(--navy-deep);
  color: var(--text-body);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── Typography ── */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--white);
  line-height: 1.25;
}

h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.7rem); }
h4 { font-size: 1.1rem; }

em { font-style: normal; }

p  { font-size: clamp(0.95rem, 1.5vw, 1.05rem); }

.gold-text    { color: var(--gold-bright); }
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-bright);
  margin-bottom: 0.75rem;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 6rem 0; }

/* ── Scroll Reveal Animation System ── */
.reveal {
  opacity: 0;
  transform: translateY(48px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.reveal.reveal-left  { transform: translateX(-48px); }
.reveal.reveal-right { transform: translateX(48px); }
.reveal.reveal-scale { transform: scale(0.9); }
.reveal.reveal-up    { transform: translateY(48px); }

.reveal.active {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* Text char reveal */
.char-reveal span {
  display: inline-block;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.char-reveal.active span {
  opacity: 1;
  transform: none;
}

/* ── Navigation ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0.6rem 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.navbar.scrolled {
  background: rgba(10, 22, 40, 0.97);
  box-shadow: 0 4px 30px rgba(0,0,0,0.4);
  padding: 0.4rem 0;
  backdrop-filter: blur(16px);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.nav-logo img,
.nav-logo svg {
  height: 70px;
  width: auto;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.nav-logo-text .name {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
  line-height: 1;
}
.nav-logo-text .tagline {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--gold-bright);
  margin-top: 0.2rem;
}

.nav-rating-badge {
  position: absolute;
  top: 100%;
  right: 0;
  white-space: nowrap;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--gold-bright) !important;
  margin-top: 0.3rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-body);
  position: relative;
  transition: color var(--transition-fast);
  white-space: nowrap;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--gold-bright);
  transition: width var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--gold-bright);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  background: linear-gradient(135deg, var(--gold-mid), var(--gold-bright));
  color: var(--navy-deep) !important;
  font-weight: 700 !important;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-xl);
  font-size: 1rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast) !important;
  box-shadow: 0 4px 20px rgba(212,168,71,0.3);
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(212,168,71,0.5) !important;
}
.nav-cta::after { display: none !important; }
.nav-links a.nav-highlight {
  display: inline-block !important;
  background: linear-gradient(135deg, var(--gold-mid), var(--gold-bright)) !important;
  color: var(--navy-deep) !important;
  font-weight: 700 !important;
  padding: 0.5rem 1.4rem !important;
  border-radius: 50px !important;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast) !important;
  box-shadow: 0 4px 20px rgba(212,168,71,0.3) !important;
  border: none !important;
  line-height: 1.2 !important;
}
.nav-links a.nav-highlight:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 8px 30px rgba(212,168,71,0.5) !important;
  color: var(--navy-deep) !important;
}
.nav-links a.nav-highlight::after {
  display: none !important;
}
/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 26px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* Mobile nav drawer (Slide panel taking 75% width on tablet, 100% on phone) */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  bottom: 0;
  width: 75%;
  max-width: 320px;
  background: rgba(7, 27, 56, 0.95); /* Deep solid luxury navy with blur */
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-left: 1px solid var(--border-gold);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 1.5rem;
  transition: right 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: -10px 0 30px rgba(0,0,0,0.5);
  padding: 110px 2rem 40px;
  overflow-y: auto;
}
.mobile-menu.open {
  right: 0;
}
.mobile-menu a {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  color: var(--white);
  transition: color var(--transition-fast);
  letter-spacing: 0.02em;
}
.mobile-menu a.nav-highlight {
  background: linear-gradient(135deg, var(--gold-mid), var(--gold-bright)) !important;
  color: var(--navy-deep) !important;
  font-weight: 700 !important;
  padding: 0.55rem 2rem !important;
  border-radius: 50px !important;
  font-size: 1.15rem !important;
  margin-top: 0.4rem !important;
  box-shadow: 0 4px 15px rgba(212,168,71,0.3) !important;
  border: none !important;
  text-align: center;
  width: 90%;
  box-sizing: border-box;
}

.mobile-badge {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--gold-bright);
  text-align: center;
  margin-top: 0.5rem;
  line-height: 1.4;
  max-width: 90%;
}

/* Hide brand logo when menu is open to prevent overlapping */
.navbar.menu-open .nav-logo {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

@media (max-width: 480px) {
  .mobile-menu {
    width: 100%;
    max-width: 100%;
    border-left: none;
  }
}
/* Semi-transparent backdrop overlay for rest of screen */
.mobile-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(6, 14, 28, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}
.mobile-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-xl);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  border: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.btn:hover { transform: translateY(-3px); }

.btn-gold {
  background: linear-gradient(135deg, var(--gold-mid) 0%, var(--gold-bright) 50%, var(--gold-light) 100%);
  color: var(--navy-deep);
  box-shadow: 0 6px 30px rgba(212,168,71,0.35);
}
.btn-gold:hover { box-shadow: 0 10px 40px rgba(212,168,71,0.55); }

.btn-outline {
  background: transparent;
  border: 2px solid var(--gold-bright);
  color: var(--gold-bright);
}
.btn-outline:hover {
  background: rgba(212,168,71,0.1);
  box-shadow: 0 6px 25px rgba(212,168,71,0.2);
}

/* ── Gold Divider ── */
.gold-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0 2.5rem;
}
.gold-divider span {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--gold-bright), transparent);
}
.gold-divider i {
  color: var(--gold-bright);
  font-size: 0.9rem;
}

/* ── Section Header ── */
.section-header { text-align: center; margin-bottom: 4rem; }
.section-header .underline-gold {
  display: inline-block;
  width: 80px; height: 3px;
  background: linear-gradient(to right, var(--gold-mid), var(--gold-bright));
  border-radius: 2px;
  margin-top: 1rem;
}

/* ── Cards ── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-md);
  padding: 2rem;
  backdrop-filter: blur(12px);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-gold);
  border-color: rgba(212, 168, 71, 0.6);
}

/* ── Custom Responsive Grids ── */
.why-choose-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.about-journey-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

/* ── Footer ── */
footer {
  background: #060e1c;
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border-gold);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 300px;
}

.footer-col h4 {
  color: var(--gold-bright);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}
.footer-col a,
.footer-col p {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  transition: color var(--transition-fast);
}
.footer-col a:hover { color: var(--gold-bright); }

.footer-bottom {
  border-top: 1px solid rgba(212,168,71,0.15);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.social-icons {
  display: flex;
  gap: 0.75rem;
}
.social-icons a {
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-gold);
  border-radius: 50%;
  color: var(--gold-bright);
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.social-icons a:hover {
  background: var(--gold-bright);
  color: var(--navy-deep);
  transform: translateY(-3px);
}

/* ── Page Hero (inner pages) ── */
.page-hero {
  padding: 10rem 0 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 50% 100%, rgba(212,168,71,0.12) 0%, transparent 70%);
  pointer-events: none;
}

/* ── Floating tooth particles (decorative) ── */
.particle-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.particle-bg span {
  position: absolute;
  width: 4px; height: 4px;
  background: var(--gold-bright);
  border-radius: 50%;
  opacity: 0.3;
  animation: float-up 8s infinite linear;
}

@keyframes float-up {
  0%   { transform: translateY(100%) rotate(0deg); opacity: 0; }
  10%  { opacity: 0.4; }
  90%  { opacity: 0.2; }
  100% { transform: translateY(-100vh) rotate(360deg); opacity: 0; }
}

/* ── Responsive ── */
.mobile-socials {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.5rem;
}
.mobile-socials a {
  width: 44px;
  height: 44px;
  border-radius: 50% !important;
  border: 1px solid var(--border-gold) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  color: var(--gold-bright) !important;
  font-size: 1.15rem !important;
  transition: background var(--transition-fast), color var(--transition-fast) !important;
}
.mobile-socials a:hover {
  background: var(--gold-bright) !important;
  color: var(--navy-deep) !important;
}

@media (max-width: 1130px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  /* Collapse milestones and stats to single column on mobile/tablet */
  .about-journey-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  /* Collapse why choose us cards to single column on mobile/tablet */
  .why-choose-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  section { padding: 4rem 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }

  /* Logo text nowrap on mobile to avoid squishing */
  .nav-logo-text .name,
  .nav-logo-text .tagline {
    white-space: nowrap;
  }

  /* Stack Doctor Card on Home Page */
  .doctor-card-home {
    flex-direction: column;
    text-align: center;
    padding: 1.5rem;
    gap: 1rem;
  }
  .doctor-avatar-large {
    margin: 0 auto;
  }
  .doctor-card-info h3 {
    margin-top: 0.5rem;
  }

  /* Responsive 17 Services preview stack */
  .services-preview-grid {
    grid-template-columns: 1fr;
  }

  /* Responsive credentials stack on About page */
  .credentials-grid {
    grid-template-columns: 1fr;
  }

  /* Responsive process steps stack on Services page */
  .process-steps {
    grid-template-columns: 1fr;
  }

  /* Responsive date/time row for Booking Page */
  .form-row-responsive {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

/* ── Scroll bar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--navy-deep); }
::-webkit-scrollbar-thumb { background: var(--gold-mid); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold-bright); }

/* ── Utility ── */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .reveal { transition: opacity 0.3s ease; transform: none !important; }
  * { animation-duration: 0.01ms !important; }
}