/* ===== COLOR SYSTEM ===== */
:root {
  /* Primary Colors - Easy to change for different themes */
  --primary: #2c5aa0; /* Main brand color - can be changed to any color */
  --secondary: #f39c12; /* Accent color - complementary to primary */
  --neutral: #34495e; /* Dark neutral for text and borders */
  --light: #ecf0f1; /* Light neutral for backgrounds */

  /* Semantic Colors - Derived from primary colors */
  --accent: var(--secondary);
  --text-primary: var(--neutral);
  --text-secondary: #7f8c8d;
  --text-tertiary: #95a5a6;
  --background: #ffffff;
  --background-primary: #ffffff;
  --background-alt: var(--light);
  --border: #bdc3c7;
  --border-color: #e1e8ed;
  --shadow: rgba(44, 90, 160, 0.1);

  /* Interactive States */
  --hover: #e67e22;
  --active: #d35400;
  --focus: rgba(44, 90, 160, 0.2);

  /* Typography */
  --font-family: "Montserrat", sans-serif;
  --font-size-base: 16px;
  --font-size-small: 14px;
  --font-size-large: 18px;
  --font-size-h1: 2.5rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.5rem;
  --font-size-h4: 1.25rem;
  --font-size-h5: 1.125rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Layout */
  --max-width: 1200px;
  --header-height: 90px;
  --footer-height: 60px;

  /* Additional Colors for Publications */
  --success: #27ae60;
  --info: #3498db;
  --warning: #f39c12;
  --error: #e74c3c;
  --primary-light: rgba(44, 90, 160, 0.1);
  --primary-shadow: rgba(44, 90, 160, 0.3);
}

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

html {
  height: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== LAYOUT ===== */
#app {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

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

h1 {
  font-size: var(--font-size-h1);
}
h2 {
  font-size: var(--font-size-h2);
}
h3 {
  font-size: var(--font-size-h3);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

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

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

/* ===== UTILITY CLASSES ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

.mb-0 {
  margin-bottom: 0;
}
.mb-1 {
  margin-bottom: var(--spacing-sm);
}
.mb-2 {
  margin-bottom: var(--spacing-md);
}
.mb-3 {
  margin-bottom: var(--spacing-lg);
}
.mb-4 {
  margin-bottom: var(--spacing-xl);
}

.mt-0 {
  margin-top: 0;
}
.mt-1 {
  margin-top: var(--spacing-sm);
}
.mt-2 {
  margin-top: var(--spacing-md);
}
.mt-3 {
  margin-top: var(--spacing-lg);
}
.mt-4 {
  margin-top: var(--spacing-xl);
}