/* =================================================================
   Acupuncture Website - Main Stylesheet
   Professional Health & Wellness Design System
   ================================================================= */

/* =================================================================
   CSS Custom Properties - Design Tokens
   ================================================================= */
:root {
  /* Primary Colors - Professional Navy/Teal */
  --primary-color: #1e4d6b;
  --primary-dark: #143a52;
  --secondary-color: #4a7c8f;
  --accent-color: #c9967a;
  --accent-dark: #b07d5f;

  /* Neutral Colors */
  --white: #ffffff;
  --off-white: #fafafa;
  --light-gray: #f5f5f5;
  --gray: #6b7280;
  --dark-gray: #374151;
  --charcoal: #1f2937;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-accent: 'Merriweather', Georgia, serif;

  /* Font Sizes */
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.875rem;
  --fs-4xl: 2.25rem;
  --fs-5xl: 3rem;
  --fs-6xl: 3.75rem;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Border Radius */
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-base: 300ms ease-in-out;

  /* Z-index */
  --z-sticky: 1020;
}

/* =================================================================
   Reset & Base Styles
   ================================================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--charcoal);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-base);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* =================================================================
   Typography
   ================================================================= */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-accent);
  line-height: 1.2;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--fs-5xl);
}

h2 {
  font-size: var(--fs-4xl);
}

h3 {
  font-size: var(--fs-3xl);
}

h4 {
  font-size: var(--fs-2xl);
}

h5 {
  font-size: var(--fs-xl);
}

h6 {
  font-size: var(--fs-lg);
}

p {
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}


/* =================================================================
   Layout & Container
   ================================================================= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-3xl) 0;
}


/* =================================================================
   Header & Navigation
   ================================================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.3), transparent);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  transition: var(--transition-base);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
}

.logo {
  font-family: var(--font-accent);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: var(--transition-base);
}

.header.scrolled .logo {
  color: var(--primary-color);
}

.logo-icon {
  width: 36px;
  height: 36px;
  color: var(--white);
  transition: var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.header.scrolled .logo-icon {
  color: var(--accent-color);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  position: relative;
  transition: var(--transition-base);
  color: var(--white);
}

.header.scrolled .nav-link {
  color: var(--charcoal);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--white);
  transition: var(--transition-base);
}

.header.scrolled .nav-link::after {
  background: var(--primary-color);
}

.nav-link:hover,
.nav-link.active {
  color: var(--white);
}

.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active {
  color: var(--primary-color);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-xs);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--white);
  transition: var(--transition-base);
  border-radius: var(--radius-sm);
}

.header.scrolled .nav-toggle span {
  background: var(--charcoal);
}

/* =================================================================
   Hero Section
   ================================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(30, 77, 107, 0.95), rgba(74, 124, 143, 0.9)),
    url('../images/hero-bg.jpg') center/cover no-repeat;
  color: var(--white);
  overflow: hidden;
  padding-top: 70px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.1));
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  animation: fadeInUp 1s ease-out;
}

.hero h1 {
  color: var(--white);
  font-size: var(--fs-6xl);
  margin-bottom: var(--spacing-md);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
  font-size: var(--fs-xl);
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
}

/* =================================================================
   Buttons
   ================================================================= */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-xl);
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-full);
  transition: var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  font-size: var(--fs-base);
}

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

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

.btn-accent {
  background: var(--accent-color);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}


/* =================================================================
   Cards
   ================================================================= */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition-base);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

/* =================================================================
   Services Section
   ================================================================= */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.service-card {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--off-white);
  border-radius: var(--radius-lg);
  transition: var(--transition-base);
  border: 2px solid transparent;
  cursor: pointer;
}

.service-card:hover {
  background: var(--white);
  border-color: var(--primary-color);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.service-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: var(--fs-3xl);
}

/* =================================================================
   Footer
   ================================================================= */
.footer {
  background: var(--charcoal);
  color: var(--light-gray);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

/* =================================================================
   Utilities
   ================================================================= */
.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--accent-color);
  border-radius: var(--radius-full);
}

/* =================================================================
   Animations
   ================================================================= */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =================================================================
   Responsive Design
   ================================================================= */
@media (max-width: 992px) {
  :root {
    --fs-6xl: 2.5rem;
    --fs-5xl: 2rem;
    --fs-4xl: 1.75rem;
  }

  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: transparent;
    width: 100%;
    height: calc(100vh - 70px);
    /* Keep height for scrollability */
    justify-content: flex-start;
    /* Keep original alignment */
    text-align: center;
    transition: var(--transition-base);
    box-shadow: none;
    padding: 0;
    gap: 0;
  }

  .nav-menu.active {
    left: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu li {
    width: 100%;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  }

  .nav-link {
    padding: var(--spacing-md);
    display: block;
    color: var(--white);
    /* Default color when menu is not active */
  }

  .nav-menu.active .nav-link {
    color: var(--charcoal);
  }

  .nav-menu.active .nav-link:hover,
  .nav-menu.active .nav-link.active {
    color: var(--primary-color);
    background: var(--off-white);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: var(--fs-4xl);
  }

  .hero p {
    font-size: var(--fs-lg);
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }
}

/* =================================================================
   About Page Responsive Layout
   ================================================================= */
@media (min-width: 768px) {
  .about-profile {
    grid-template-columns: 280px 1fr !important;
    gap: 3rem !important;
  }

  .about-profile>div:first-child {
    text-align: center;
  }
}