/* ========================================
   TSGAL Genç Bizz - CSS Variables & Tema
   Light Theme Tasarım
   ======================================== */

:root {
  /* Renk Paletı - Light Theme (Ana Tema) */
  --primary-bg: #ffffff;
  --secondary-bg: #f5f7f6;
  --tertiary-bg: #e8f1ed;
  
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #888888;
  
  --accent-color: #00bcd4; /* Aqua / Soft Mavi */
  --accent-light: #b2ebf2;
  --accent-dark: #00897b;
  
  --border-color: #d0d0d0;
  --shadow-light: rgba(0, 0, 0, 0.08);
  --shadow-medium: rgba(0, 0, 0, 0.12);
  
  /* Typography */
  --font-family-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-family-mono: 'Courier New', monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
}

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

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  background-color: var(--primary-bg);
  color: var(--text-primary);
  line-height: 1.6;
}

/* ========================================
   HEADER / NAV
   ======================================== */

header {
  background-color: var(--primary-bg);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 4px var(--shadow-light);
}

header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  gap: var(--spacing-lg);
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo img {
  height: 40px;
  width: auto;
}

.nav-center {
  flex: 1;
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
}

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

.nav-right i {
  color: var(--accent-color);
  width: 24px;
  height: 24px;
  cursor: pointer;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  white-space: nowrap;
  font-size: 0.9rem;
  font-weight: 500;
  font-style: normal;
}

.nav-right i:hover {
  color: var(--accent-dark);
}

nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
}

nav a:hover {
  color: var(--accent-color);
  background-color: var(--tertiary-bg);
}

nav a.active {
  color: var(--accent-color);
  border-bottom: 2px solid var(--accent-color);
}

.featured {
  margin-bottom: var(--spacing-2xl);
}

#userIcon {
  width: 30px;
  height: 30px;
}

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

button {
  font-family: var(--font-family-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  border-radius: var(--radius-md);
  user-select: none;
}

.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--accent-dark);
  border-color: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow-medium);
}

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

.btn-secondary:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  background-color: var(--tertiary-bg);
}

.btn-small {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.85rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========================================
   MAIN LAYOUT
   ======================================== */

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-xl);
  min-height: calc(100vh - 200px);
}

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

.hero {
  text-align: center;
  padding: var(--spacing-2xl) 0;
  margin-bottom: var(--spacing-2xl);
  border-bottom: 1px solid var(--border-color);
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   MODAL
   ======================================== */

.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  animation: fadeIn var(--transition-normal);
}

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

.modal {
  background-color: var(--primary-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  max-width: 500px;
  width: 90%;
  box-shadow: 0 10px 40px var(--shadow-medium);
  animation: slideUp var(--transition-normal);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 1.5rem;
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  color: var(--text-primary);
}

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: var(--font-family-primary);
  font-size: 1rem;
  color: var(--text-primary);
  background-color: var(--secondary-bg);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  background-color: var(--primary-bg);
}

.modal-footer {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
  margin-top: var(--spacing-xl);
}

/* ========================================
   ARTICLES / CARDS
   ======================================== */

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.article-card {
  background-color: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background-color: var(--accent-color);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.article-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px var(--shadow-medium);
  border-color: var(--accent-color);
}

.article-card:hover::before {
  transform: scaleX(1);
}

.article-header {
  margin-bottom: var(--spacing-md);
}

.article-title {
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
}

.article-author {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.article-date {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.article-content {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--border-color);
  position: relative;
}

.article-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* ========================================
   MARKETS (ECONOMICS PAGE)
   ======================================== */

.markets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.market-card {
  background-color: var(--secondary-bg);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.market-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 4px;
  width: 100%;
  background-color: var(--accent-color);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.market-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px var(--shadow-medium);
  border-color: var(--accent-color);
}

.market-card:hover::before {
  transform: scaleX(1);
}

.market-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.market-title {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--text-primary);
  margin: 0;
  flex: 1;
}

.market-symbol {
  display: inline-block;
  background-color: var(--accent-light);
  color: var(--accent-dark);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.8rem;
  margin-left: var(--spacing-sm);
  white-space: nowrap;
}

.market-description {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  margin: 0 0 var(--spacing-lg) 0;
}

.market-value {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.value-placeholder {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--accent-color);
}

/* ========================================
   ARTICLE DETAIL
   ======================================== */

.article-detail {
  max-width: 800px;
  margin: 0 auto;
  background-color: var(--secondary-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  border: 1px solid var(--border-color);
}

.article-detail-header {
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 2px solid var(--accent-color);
}

.article-detail-title {
  font-size: 2rem;
  font-weight: bold;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.article-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.article-detail-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
  margin-bottom: var(--spacing-2xl);
}

.article-detail-body p {
  margin-bottom: var(--spacing-lg);
}

.article-interactions {
  display: flex;
  gap: var(--spacing-lg);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
  margin-left: 5px;
}

.interaction-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1.5rem;

}

.interaction-btn:hover {
  color: var(--accent-color);
  transform: scale(1.05);
}

.interaction-btn.liked {
  color: var(--accent-color);
}

/* ========================================
   TEAM / ABOUT PAGE
   ======================================== */

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.team-card {
  background-color: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.team-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 16px 32px var(--shadow-medium);
  border-color: var(--accent-color);
}

.team-card-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-light), var(--accent-color));
  margin: 0 auto var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: bold;
  color: white;
  border: 2px solid var(--accent-color);
  user-select: none;
}

.team-card-avatar-img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto var(--spacing-lg);
  display: block;
  object-fit: cover;
  border: 2px solid var(--accent-color);
}

.team-card-name {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.team-card-role {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: var(--spacing-sm);
}

.team-card-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: var(--spacing-md);
}

.team-card-contribution {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

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

footer {
  background-color: var(--secondary-bg);
  border-top: 1px solid var(--border-color);
  padding: 0;
  text-align: center;
  color: var(--text-secondary);
  position: fixed;
  bottom: 0;
  width: 100%;
  align-items: center;
}

footer p {
  margin-top: 5px;
  font-size: 0.8rem;
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(30px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slideIn {
  from {
    transform: translateX(-20px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

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

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

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

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

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

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

.gap-1 { gap: var(--spacing-md); }
.gap-2 { gap: var(--spacing-lg); }

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ========================================
   RESPONSIVE TASARIM
   ======================================== */

@media (max-width: 768px) {
  header nav {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  header {
    padding: var(--spacing-lg) var(--spacing-xl);
    height: 36vh;
  }

  .nav-center {
    order: 3;
    width: 100%;
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .nav-right {
    order: 2;
    width: 100%;
  }

  .nav-right button {
    width: 100%;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  main {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .articles-grid {
    grid-template-columns: 1fr;
  }

  .markets-grid {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }

  .article-detail {
    padding: var(--spacing-lg);
  }

  .article-detail-title {
    font-size: 1.5rem;
  }

  .article-detail-meta {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .modal {
    width: 95%;
    padding: var(--spacing-lg);
  }
  footer p {
  margin-top: 5px;
  font-size: 0.75rem;
  }
}

@media (max-width: 480px) {
  header {
    padding: var(--spacing-md);
  }

  .logo {
    font-size: 1.2rem;
  }

  .logo img {
    height: 30px;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .articles-grid,
  .team-grid {
    gap: var(--spacing-lg);
  }

  .article-meta {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

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

  .modal-header h2 {
    font-size: 1.2rem;
  }
}