/* ===========================
   CSS Variables (Design Tokens)
   — پالت لاکچری آبی دریایی شفاف —
   =========================== */
:root {
  --primary: #0D7C9C;
  --primary-dark: #095f78;
  --primary-light: #e0f4f9;
  --accent: #F39C12;
  --secondary-accent: #C8A24C;
  --neutral: #FAF8F5;
  --background: #FEFDFB;
  --surface: #FEFDFB;
  --surface-card: #FFFFFF;
  --surface-elevated: #F5F7FA;
  --ink: #1A1A1A;
  --ink-muted: rgba(26,26,26,0.65);
  --ink-subtle: rgba(26,26,26,0.38);
  --border: rgba(13,124,156,0.12);
  --border-light: rgba(26,26,26,0.08);
  --shadow-card: 0 4px 12px rgba(13,124,156,0.08);
  --shadow-lift: 0 12px 32px rgba(13,124,156,0.12);
  --motion-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-duration: 0.9s;
  --motion-normal: 320ms;
}

/* ===========================
   Base
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--background);
  color: var(--ink);
  font-family: 'Vazirmatn', system-ui, sans-serif;
  font-feature-settings: 'ss01';
}

/* ===========================
   Sticky Navbar
   =========================== */
#navbar {
  background: transparent;
  transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#navbar.scrolled {
  background: rgba(254, 253, 251, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 24px rgba(13,124,156,0.10);
  border-bottom: 1px solid var(--border);
}

/* ===========================
   Scroll Reveal Animations
   =========================== */
.reveal-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity var(--motion-duration) var(--motion-ease),
              transform var(--motion-duration) var(--motion-ease);
}

.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-up-delay {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--motion-duration) 0.2s var(--motion-ease),
              transform var(--motion-duration) 0.2s var(--motion-ease);
}

.reveal-up-delay.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-up-delay2 {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--motion-duration) 0.4s var(--motion-ease),
              transform var(--motion-duration) 0.4s var(--motion-ease);
}

.reveal-up-delay2.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger for service cards */
.service-card:nth-child(1) { transition-delay: 0ms; }
.service-card:nth-child(2) { transition-delay: 80ms; }
.service-card:nth-child(3) { transition-delay: 160ms; }
.service-card:nth-child(4) { transition-delay: 240ms; }
.service-card:nth-child(5) { transition-delay: 320ms; }
.service-card:nth-child(6) { transition-delay: 400ms; }

.testimonial-card:nth-child(1) { transition-delay: 0ms; }
.testimonial-card:nth-child(2) { transition-delay: 100ms; }
.testimonial-card:nth-child(3) { transition-delay: 200ms; }

.doctor-card:nth-child(1) { transition-delay: 0ms; }
.doctor-card:nth-child(2) { transition-delay: 140ms; }

/* ===========================
   Service Cards
   =========================== */
.service-card {
  background-color: #FFFFFF;
  border: 1px solid rgba(13,124,156,0.10);
  transition: transform 0.35s var(--motion-ease),
              box-shadow 0.35s var(--motion-ease),
              border-color 0.35s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: rgba(13,124,156,0.30);
}

.service-icon-wrap {
  background-color: rgba(13,124,156,0.08);
  transition: background-color 0.3s ease;
}

.service-card:hover .service-icon-wrap {
  background-color: var(--primary);
}

.service-icon {
  color: var(--primary);
  transition: color 0.3s ease;
}

.service-card:hover .service-icon {
  color: #FFFFFF;
}

/* Featured service */
.featured-service {
  background: linear-gradient(135deg, #0D7C9C 0%, #095f78 100%);
  border-color: #0D7C9C !important;
  animation: primary-pulse 3.5s ease-in-out infinite;
}

@keyframes primary-pulse {
  0%, 100% { box-shadow: 0 12px 32px rgba(13,124,156,0.18); }
  50%       { box-shadow: 0 16px 48px rgba(13,124,156,0.32); }
}

/* ===========================
   Doctor Cards
   =========================== */
.doctor-card {
  background-color: #FFFFFF;
  border: 1px solid rgba(13,124,156,0.10);
  transition: transform 0.4s var(--motion-ease),
              box-shadow 0.4s var(--motion-ease);
}

.doctor-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 40px rgba(13,124,156,0.14);
}

/* ===========================
   Testimonial Cards
   =========================== */
.testimonial-card {
  background-color: #FFFFFF;
  border: 1px solid rgba(13,124,156,0.08);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.testimonial-card:hover {
  border-color: rgba(13,124,156,0.28);
  box-shadow: 0 8px 32px rgba(13,124,156,0.10);
}

/* ===========================
   Form Styles
   =========================== */
input, select, textarea {
  background-color: #F5F7FA !important;
  color: #1A1A1A !important;
  border-color: rgba(13,124,156,0.18) !important;
}

input::placeholder, textarea::placeholder {
  color: rgba(26,26,26,0.38);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 3px rgba(13,124,156,0.12) !important;
  background-color: #FFFFFF !important;
}

select {
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%230D7C9C' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: left 12px center;
  padding-left: 36px;
}

select option {
  background-color: #FFFFFF;
  color: #1A1A1A;
}

/* ===========================
   Navbar Links
   =========================== */
.nav-link {
  color: rgba(26,26,26,0.65);
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--primary);
}

.nav-link.active {
  color: var(--primary) !important;
  font-weight: 700;
}

/* ===========================
   CTA Buttons
   =========================== */
.btn-primary {
  background-color: var(--primary);
  color: #FFFFFF;
  font-weight: 700;
  transition: background-color 0.25s ease,
              box-shadow 0.25s ease,
              transform 0.2s ease;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  box-shadow: 0 8px 24px rgba(13,124,156,0.28);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.55);
  color: #FFFFFF;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.btn-outline:hover {
  background-color: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.85);
}

/* ===========================
   Accent elements
   =========================== */
.accent-line {
  background-color: var(--accent);
}

/* ===========================
   Section alternation
   =========================== */
.section-alt {
  background-color: var(--neutral);
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  section { padding-top: 4rem; padding-bottom: 4rem; }
}

/* ===========================
   Reduced Motion
   =========================== */
@media (prefers-reduced-motion: reduce) {
  .reveal-up, .reveal-up-delay, .reveal-up-delay2 {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .featured-service { animation: none; }
  .service-card:hover { transform: none; }
  .doctor-card:hover  { transform: none; }
  html { scroll-behavior: auto; }
}