/* Tradore - Institutional Knowledge Portal */
/* Design System & Global Styles */

/* ============================================
   GOOGLE FONTS IMPORTS
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Lora:wght@400;500;600;700&family=Open+Sans:wght@400;500;600;700&display=swap');

/* ============================================
   CSS CUSTOM PROPERTIES - DESIGN TOKENS
   ============================================ */
:root {
  /* Primary Colors */
  --color-primary: #343A40;
  --color-background: #F8F9FA;
  --color-light-gray: #E9ECEF;
  
  /* Accent Colors */
  --color-sage-green: #8FBC8F;
  --color-terracotta: #CD7F5D;
  --color-muted-blue: #6A8BA8;
  
  /* Typography */
  --font-heading: 'Lora', serif;
  --font-body: 'Open Sans', sans-serif;
  
  /* Spacing System */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 60px;
  --spacing-xxl: 100px;
  --spacing-xxxl: 150px;
  
  /* Container */
  --container-max-width: 1400px;
  
  /* Typography Scale */
  --font-size-h1: 48px;
  --font-size-h2: 36px;
  --font-size-h3: 24px;
  --font-size-body: 16px;
  --font-size-small: 14px;
  
  --line-height-tight: 1.3;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;
  
  /* Shadows & Effects */
  --shadow-sm: 0 2px 8px rgba(52, 58, 64, 0.1);
  --shadow-md: 0 4px 12px rgba(52, 58, 64, 0.15);
  --shadow-lg: 0 8px 24px rgba(52, 58, 64, 0.2);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Transitions */
  --transition: 0.3s ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  line-height: var(--line-height-normal);
  color: var(--color-primary);
  background-color: var(--color-background);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-primary);
}

h1 {
  font-size: var(--font-size-h1);
  margin-bottom: var(--spacing-lg);
  font-weight: 700;
}

h2 {
  font-size: var(--font-size-h2);
  margin-bottom: var(--spacing-md);
  font-weight: 600;
  margin-top: var(--spacing-xl);
}

h3 {
  font-size: var(--font-size-h3);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  margin-top: var(--spacing-lg);
}

p {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
}

a {
  color: var(--color-muted-blue);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-sage-green);
  text-decoration: underline;
}

ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-relaxed);
}

/* ============================================
   CONTAINER & LAYOUT UTILITIES
   ============================================ */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-full-width {
  width: 100%;
  padding: 0 var(--spacing-md);
}

/* ============================================
   SECTION STYLING
   ============================================ */
section {
  padding: var(--spacing-xxl) 0;
}

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

section.section-accent {
  background-color: var(--color-light-gray);
}

section.section-sage {
  background-color: rgba(143, 188, 143, 0.08);
}

section.section-terracotta {
  background-color: rgba(205, 127, 93, 0.08);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
header {
  position: sticky;
  top: 0;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-light-gray);
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.header-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-sage-green);
}

nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  gap: var(--spacing-lg);
}

nav a {
  font-family: var(--font-body);
  font-size: var(--font-size-small);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
  position: relative;
}

nav a:hover,
nav a.active {
  color: var(--color-sage-green);
}

nav a.active::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-sage-green);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  background-color: var(--color-primary);
  color: #FFFFFF;
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

footer .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

footer h3 {
  color: #FFFFFF;
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

footer ul {
  list-style: none;
  margin-left: 0;
}

footer ul li {
  margin-bottom: var(--spacing-sm);
}

footer a {
  color: var(--color-light-gray);
  transition: color var(--transition);
}

footer a:hover {
  color: var(--color-sage-green);
}

footer .footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-lg);
  text-align: center;
  font-size: var(--font-size-small);
  color: var(--color-light-gray);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(52, 58, 64, 0.9), rgba(52, 58, 64, 0.8)), 
              url('../images/hero-nutrition.jpg') center/cover;
  background-attachment: fixed;
  color: #FFFFFF;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  padding: var(--spacing-lg);
}

.hero h1 {
  color: #FFFFFF;
  margin-bottom: var(--spacing-md);
  font-size: 56px;
}

.hero p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 20px;
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-relaxed);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-body);
  font-size: var(--font-size-small);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--color-sage-green);
  color: #FFFFFF;
  border-color: var(--color-sage-green);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-sage-green);
  border-color: var(--color-sage-green);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.btn-outline {
  background-color: transparent;
  color: #FFFFFF;
  border-color: #FFFFFF;
}

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

/* ============================================
   CARDS & BOXES
   ============================================ */
.card {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

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

.card-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.card-text {
  font-size: var(--font-size-body);
  color: var(--color-primary);
  line-height: var(--line-height-relaxed);
}

.info-box {
  background-color: rgba(143, 188, 143, 0.1);
  border-left: 4px solid var(--color-sage-green);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-md) 0;
}

.info-box-title {
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   TWO-COLUMN LAYOUT
   ============================================ */
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
  margin-bottom: var(--spacing-xxxl);
}

.row.reverse {
  direction: rtl;
}

.row.reverse > * {
  direction: ltr;
}

.row-content {
  flex: 1;
}

.row-image {
  flex: 1;
}

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

/* ============================================
   GRID LAYOUTS
   ============================================ */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

/* ============================================
   BLOG SECTION
   ============================================ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.blog-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  text-decoration: none;
  color: var(--color-primary);
  display: block;
}

.blog-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-8px);
}

.blog-card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

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

.blog-card-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.blog-card-excerpt {
  font-size: var(--font-size-small);
  color: #666;
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-md);
}

.blog-card-meta {
  font-size: 12px;
  color: #999;
}

/* ============================================
   FORMS
   ============================================ */
form {
  max-width: 600px;
  margin: var(--spacing-xl) auto;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-primary);
}

input,
textarea,
select {
  width: 100%;
  padding: var(--spacing-sm);
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  border: 1px solid var(--color-light-gray);
  border-radius: var(--radius-md);
  transition: border-color var(--transition);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-sage-green);
  box-shadow: 0 0 0 3px rgba(143, 188, 143, 0.1);
}

textarea {
  resize: vertical;
  min-height: 150px;
}

/* ============================================
   TABLES
   ============================================ */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  background-color: #FFFFFF;
}

th {
  background-color: var(--color-light-gray);
  color: var(--color-primary);
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-sage-green);
}

td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-light-gray);
}

tr:hover {
  background-color: rgba(143, 188, 143, 0.05);
}

/* ============================================
   ACCORDION
   ============================================ */
.accordion-item {
  background-color: #FFFFFF;
  border: 1px solid var(--color-light-gray);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
}

.accordion-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-light-gray);
  cursor: pointer;
  font-weight: 600;
  transition: background-color var(--transition);
}

.accordion-title:hover {
  background-color: rgba(143, 188, 143, 0.1);
}

.accordion-title.active {
  background-color: rgba(143, 188, 143, 0.2);
  color: var(--color-sage-green);
}

.accordion-content {
  padding: var(--spacing-lg);
  display: none;
}

.accordion-content.active {
  display: block;
}

.accordion-toggle {
  transition: transform var(--transition);
  font-size: 20px;
}

.accordion-toggle.active {
  transform: rotate(180deg);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center {
  text-align: center;
}

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

.mt-xxl { margin-top: var(--spacing-xxl); }
.mb-xxl { margin-bottom: var(--spacing-xxl); }
.py-xxl { padding-top: var(--spacing-xxl); padding-bottom: var(--spacing-xxl); }

.highlight {
  color: var(--color-sage-green);
  font-weight: 600;
}

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

.accent-text-blue {
  color: var(--color-muted-blue);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .row {
    grid-template-columns: 1fr;
    gap: var(--spacing-xxl);
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-h1: 36px;
    --font-size-h2: 28px;
    --font-size-h3: 20px;
  }
  
  section {
    padding: var(--spacing-xl) 0;
  }
  
  nav ul {
    gap: var(--spacing-md);
  }
  
  .hero {
    min-height: 400px;
  }
  
  .hero h1 {
    font-size: 36px;
  }
  
  .hero p {
    font-size: 18px;
  }
  
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .header-container {
    padding: var(--spacing-sm);
  }
  
  nav ul {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .hero {
    min-height: 300px;
  }
  
  .hero h1 {
    font-size: 28px;
  }
  
  .hero p {
    font-size: 16px;
  }
  
  .btn {
    display: block;
    text-align: center;
    width: 100%;
  }
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-light-gray);
}

::-webkit-scrollbar-thumb {
  background: var(--color-sage-green);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-muted-blue);
}