/* ============================================
   REVIVAL PT & REHAB - BLOCKY DESIGN SYSTEM
   ============================================ */

/* CSS CUSTOM PROPERTIES */
:root {
  /* Primary Colors - Medical Blues/Teals */
  --primary-dark: #1e4a5c;
  --primary: #2d6a7a;
  --primary-light: #3d8a9e;
  --primary-pale: #e8f4f7;
  
  /* Accent Colors - Warm Coral/Terracotta */
  --accent: #e76f51;
  --accent-light: #f4a261;
  --accent-pale: #fff0ed;
  
  /* Neutral Colors */
  --white: #ffffff;
  --off-white: #fafafa;
  --light-gray: #f5f5f5;
  --medium-gray: #e0e0e0;
  --dark-gray: #666666;
  --text-dark: #2c2c2c;
  --text-darker: #1a1a1a;
  
  /* Status Colors */
  --success: #2a9d8f;
  --warning: #e9c46a;
  --error: #e76f51;
  
  /* Spacing System */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Typography */
  --font-primary: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-secondary: 'Georgia', serif;
  
  /* Border Radius - Sharp for blocky look */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 6px;
  
  /* Shadows - Minimal, sharp */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

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

body {
  font-family: var(--font-primary);
  color: var(--text-dark);
  background-color: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent);
}

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

ul, ol {
  list-style: none;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-darker);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--space-md);
  color: var(--dark-gray);
}

/* ============================================
   LAYOUT UTILITIES
   ============================================ */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

.section-light {
  background-color: var(--off-white);
}

.section-dark {
  background-color: var(--primary-dark);
  color: var(--white);
}

.section-dark h2,
.section-dark p {
  color: var(--white);
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.flex {
  display: flex;
  gap: var(--space-md);
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.flex-column {
  flex-direction: column;
}

/* ============================================
   BLOCK COMPONENTS
   ============================================ */

/* Block Container */
.block {
  background-color: var(--white);
  border: 1px solid var(--medium-gray);
  padding: var(--space-xl);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.block:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.block-primary {
  background-color: var(--primary);
  border-color: var(--primary);
  color: var(--white);
}

.block-primary h3,
.block-primary p {
  color: var(--white);
}

.block-accent {
  background-color: var(--accent);
  border-color: var(--accent);
  color: var(--white);
}

.block-accent h3,
.block-accent p {
  color: var(--white);
}

/* Card Blocks */
.card {
  background-color: var(--white);
  border: 1px solid var(--medium-gray);
  overflow: hidden;
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background-color: var(--light-gray);
}

.card-content {
  padding: var(--space-lg);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-darker);
  margin-bottom: var(--space-sm);
}

.card-text {
  color: var(--dark-gray);
  font-size: 0.95rem;
}

/* ============================================
   NAVIGATION
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--white);
  border-bottom: 2px solid var(--primary);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-dark);
}

.logo-icon {
  width: 40px;
  height: 40px;
}

.nav {
  display: flex;
  gap: var(--space-lg);
}

.nav-link {
  font-weight: 600;
  color: var(--text-dark);
  padding: var(--space-xs) var(--space-sm);
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--accent);
}

.nav-cta {
  background-color: var(--accent);
  color: var(--white);
  padding: var(--space-sm) var(--space-lg);
  font-weight: 600;
  transition: background-color var(--transition-fast);
}

.nav-cta:hover {
  background-color: var(--primary);
  color: var(--white);
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-sm);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-dark);
  transition: var(--transition-fast);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  background-color: var(--primary-pale);
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-content {
  padding: var(--space-2xl) 0;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  color: var(--primary-dark);
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--dark-gray);
  margin-bottom: var(--space-xl);
  max-width: 500px;
}

.hero-image {
  position: relative;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--white);
  border: 2px solid var(--primary);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--white);
}

.btn-accent {
  background-color: var(--accent);
  color: var(--white);
  border: 2px solid var(--accent);
}

.btn-accent:hover {
  background-color: var(--primary);
  border-color: var(--primary);
  color: var(--white);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background-color: var(--primary);
  color: var(--white);
}

.btn-large {
  padding: var(--space-lg) var(--space-2xl);
  font-size: 1.125rem;
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--space-xs);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-md);
  font-size: 1rem;
  font-family: inherit;
  border: 2px solid var(--medium-gray);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* ============================================
   ANIMATIONS
   ============================================ */

/* Fade In Animation */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered Animation */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--light-gray);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--primary);
  transition: width 1s ease;
}

/* ============================================
   ENTRANCE SCREEN
   ============================================ */

.entrance-screen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.entrance-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.entrance-content {
  text-align: center;
  animation: entrancePulse 2s ease-in-out;
}

@keyframes entrancePulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.entrance-logo {
  width: 80px;
  height: 80px;
  margin-bottom: var(--space-lg);
}

.entrance-title {
  font-size: 2rem;
  color: var(--primary-dark);
  margin-bottom: var(--space-sm);
}

.entrance-tagline {
  font-size: 1rem;
  color: var(--dark-gray);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background-color: var(--primary-dark);
  color: var(--white);
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer-block h4 {
  color: var(--white);
  margin-bottom: var(--space-md);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-links a {
  color: var(--white);
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer-links a:hover {
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .hero-image {
    order: -1;
  }
}

@media (max-width: 768px) {
  :root {
    --space-3xl: 4rem;
    --space-2xl: 3rem;
  }
  
  .nav {
    display: none;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    background-color: var(--white);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 2px solid var(--primary);
  }
  
  .nav.active {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .btn {
    width: 100%;
    padding: var(--space-md);
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Focus Styles */
*:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background-color: var(--primary);
  color: var(--white);
  padding: var(--space-md);
  z-index: 10000;
}

.skip-link:focus {
  top: 0;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --text-dark: #000000;
    --text-darker: #000000;
    --dark-gray: #333333;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.text-white { color: var(--white); }

.bg-primary { background-color: var(--primary); }
.bg-accent { background-color: var(--accent); }
.bg-light { background-color: var(--off-white); }

.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }
.my-lg { margin-top: var(--space-lg); margin-bottom: var(--space-lg); }

.pt-lg { padding-top: var(--space-lg); }
.pb-lg { padding-bottom: var(--space-lg); }
.py-lg { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }