/* CSS Variables */
:root {
  --color-primary: #1e3b33;
  --color-secondary: #4a9f6e;
  --color-accent: #76d7a7;
  --color-success: #4cb050;
  --color-warning: #ff9800;
  --color-danger: #f44336;
  --color-bg: #f5f5f5;
  --color-bg-subtle: #e8f5e9;
  --transition: all 0.3s ease-in-out;
  --radius: 12px;
  --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

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

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: #333;
  line-height: 1.6;
}

/* Typografia */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  margin-bottom: 16px;
}

h1 {
  font-size: 2.5rem;
  color: var(--color-primary);
}

h2 {
  font-size: 2rem;
  color: var(--color-primary);
}

h3 {
  font-size: 1.5rem;
  color: var(--color-secondary);
}

h4 {
  font-size: 1.25rem;
  color: var(--color-secondary);
}

p {
  margin-bottom: 1rem;
}

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

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

/* Przyciski */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-block;
  text-align: center;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-bg);
}

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

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

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

.btn-success {
  background: var(--color-success);
  color: white;
}

.btn-success:hover {
  background: #45a049;
}

.btn-danger {
  background: var(--color-danger);
  color: white;
}

.btn-danger:hover {
  background: #da190b;
}

.btn-small {
  padding: 8px 16px;
  font-size: 0.9rem;
}

/* Nagłówek */
header {
  background: var(--color-primary);
  color: var(--color-bg);
  padding: 20px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 12px rgba(30, 59, 51, 0.1);
}

header h1 {
  color: var(--color-bg);
  margin: 0;
  font-size: 1.8rem;
}

header a {
  color: var(--color-bg);
  margin-left: 20px;
  font-weight: 500;
}

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

header .nav {
  display: flex;
  gap: 10px;
  align-items: center;
}

header .btn-secondary {
  border-color: var(--color-bg);
  color: var(--color-bg);
}

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

/* Main */
main {
  max-width: 90vw;
  margin: 0 auto;
  padding: 40px 20px;
}

/* Sekcje */
section {
  padding: 20px 20px;
}

section.alt {
  background-color: var(--color-bg-subtle);
}

/* Karty */
.card {
  background: var(--color-bg-subtle);
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(30, 59, 51, 0.1);
  padding: 24px;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(30, 59, 51, 0.15);
}

.card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 16px;
}

.card h3 {
  margin-bottom: 8px;
}

.card p {
  color: #555;
  margin-bottom: 16px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.card small {
  color: #888;
  display: block;
  margin-bottom: 12px;
  font-size: 0.85rem;
}

/* Siatka */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

/* Login form */
.login-form {
  max-width: 400px;
  margin: 60px auto;
  padding: 40px;
  background: var(--color-bg-subtle);
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(30, 59, 51, 0.1);
}

.login-form h1 {
  text-align: center;
  margin-bottom: 30px;
}

.login-form input {
  width: 100%;
  padding: 12px 16px;
  margin-bottom: 16px;
  border: 2px solid var(--color-secondary);
  border-radius: 8px;
  font-size: 1rem;
  transition: var(--transition);
}

.login-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 59, 51, 0.1);
}

.login-form button {
  width: 100%;
}

.login-form .error {
  color: var(--color-danger);
  margin-bottom: 16px;
  padding: 12px;
  background: rgba(244, 67, 54, 0.1);
  border-radius: 8px;
}

/* Panel admina */
.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.admin-header .user-info {
  display: flex;
  align-items: center;
  gap: 20px;
}

.article-card {
  padding: 20px;
  background: white;
  border: 2px solid var(--color-bg-subtle);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.article-card.pending {
  border-left: 4px solid var(--color-warning);
}

.article-card.approved {
  border-left: 4px solid var(--color-success);
}

.article-card.rejected {
  border-left: 4px solid var(--color-danger);
  opacity: 0.7;
}

.article-card h3 {
  margin-bottom: 8px;
  font-size: 1.3rem;
}

.article-card .meta {
  display: flex;
  gap: 16px;
  margin: 12px 0;
  font-size: 0.9rem;
  color: #888;
}

.article-card .description {
  color: #555;
  margin: 16px 0;
  line-height: 1.6;
}

.article-card .actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.article-card .actions .btn {
  flex: 1;
  min-width: 140px;
}

/* Paginacja */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin: 60px 0 40px;
}

.pagination a,
.pagination span {
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 500;
}

.pagination a {
  background: var(--color-secondary);
  color: white;
}

.pagination a:hover {
  background: var(--color-primary);
}

/* Stopka */
footer {
  background: var(--color-primary);
  color: var(--color-bg);
  text-align: center;
  padding: 40px 20px;
  font-size: 0.95rem;
  margin-top: 80px;
}

/* Alert */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.alert-success {
  background: rgba(76, 175, 80, 0.1);
  color: var(--color-success);
  border-left: 4px solid var(--color-success);
}

.alert-danger {
  background: rgba(244, 67, 54, 0.1);
  color: var(--color-danger);
  border-left: 4px solid var(--color-danger);
}

.alert-warning {
  background: rgba(255, 152, 0, 0.1);
  color: var(--color-warning);
  border-left: 4px solid var(--color-warning);
}

.alert-info {
  background: rgba(30, 59, 51, 0.1);
  color: var(--color-primary);
  border-left: 4px solid var(--color-primary);
}

/* Loading */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    gap: 12px;
    text-align: center;
    padding: 16px;
  }
  
  header h1 {
    font-size: 1.5rem;
  }
  
  header a {
    margin: 5px;
  }
  
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.5rem; }
  
  main {
    padding: 20px 16px;
  }
  
  section {
    padding: 60px 16px;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .login-form {
    margin: 40px 16px;
    padding: 24px;
  }
  
  .pagination {
    flex-direction: column;
    gap: 12px;
  }
  
  .pagination a,
  .pagination span {
    width: 100%;
  }
  
  .article-card .actions {
    flex-direction: column;
  }
  
  .article-card .actions .btn {
    width: 100%;
  }
  
  .admin-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .admin-header .user-info {
    flex-direction: column;
    width: 100%;
  }
  
  .admin-header .user-info .btn {
    width: 100%;
  }
}

/* Notification Bell */
.notification-bell {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  transition: transform 0.25s ease-in-out;
  margin-right: 20px;
  user-select: none;
}

.notification-bell:hover {
  transform: scale(1.1);
}

.notification-bell .bell-icon {
  display: block;
}

.notification-badge {
  position: absolute;
  top: -6px;
  right: -8px;
  background: var(--color-danger);
  color: white;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  box-shadow: 0 2px 4px rgba(244, 67, 54, 0.3);
  animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
  0%, 100% {
    box-shadow: 0 2px 4px rgba(244, 67, 54, 0.3);
  }
  50% {
    box-shadow: 0 2px 8px rgba(244, 67, 54, 0.6);
  }
}

.notification-bell[data-has-notifications="true"] .bell-icon {
  animation: bellRing 0.5s ease-in-out;
}

@keyframes bellRing {
  0%, 100% {
    transform: rotate(0deg);
  }
  15% {
    transform: rotate(-5deg);
  }
  30% {
    transform: rotate(5deg);
  }
  45% {
    transform: rotate(-5deg);
  }
  60% {
    transform: rotate(5deg);
  }
  75% {
    transform: rotate(-2deg);
  }
  90% {
    transform: rotate(2deg);
  }
}