:root {
  --bg-gradient-start: #1a4d2e;
  --bg-gradient-end: #0f2818;
  --primary-color: #fb923c;
  --primary-hover: #f97316;
  --secondary-color: #4ade80;
  --card-bg: #1f2937;
  --text-primary: #f3f4f6;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --border-color: #374151;
  --shadow: rgba(0, 0, 0, 0.3);
  --success-bg: #064e3b;
  --success-text: #6ee7b7;
  --success-border: #065f46;
  --error-bg: #7f1d1d;
  --error-text: #fca5a5;
  --error-border: #991b1b;
  --delete-color: #ef4444;
  --delete-hover: #dc2626;
  --card-hover-shadow: rgba(251, 146, 60, 0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

header {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 30px;
  margin-bottom: 30px;
  box-shadow: 0 4px 6px var(--shadow);
}

.header-content {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
  gap: 20px;
}

.logo {
  width: 60px;
  height: 60px;
  object-fit: contain;
}

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

nav {
  display: flex;
  gap: 10px;
}

.nav-button {
  padding: 10px 20px;
  border: 2px solid var(--primary-color);
  background: var(--card-bg);
  color: var(--primary-color);
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
}

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

.nav-button.active {
  background: var(--primary-color);
  color: white;
}

.mode-section {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 4px 6px var(--shadow);
}

.mode-section.hidden {
  display: none;
}

h2 {
  color: var(--text-primary);
  margin-bottom: 20px;
  font-size: 1.8em;
}

.tag-filter-container {
  margin-bottom: 30px;
  padding: 20px;
  background: rgba(251, 146, 60, 0.1);
  border: 2px solid var(--primary-color);
  border-radius: 8px;
}

.tag-filter-container .form-group {
  margin-bottom: 0;
}

.tag-filter-container input {
  margin-bottom: 10px;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text-secondary);
}

input[type="text"],
textarea {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--border-color);
  border-radius: 6px;
  font-size: 16px;
  font-family: inherit;
  transition: all 0.3s ease;
  background: var(--card-bg);
  color: var(--text-primary);
}

input[type="text"]:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

textarea {
  resize: vertical;
}

.submit-button {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 12px 30px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s ease;
}

.submit-button:hover {
  background: var(--primary-hover);
}

.cancel-button {
  background: var(--border-color);
  color: var(--text-primary);
  border: none;
  padding: 12px 30px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s ease;
}

.cancel-button:hover {
  background: var(--text-muted);
  color: white;
}

.message {
  margin-top: 20px;
  padding: 12px;
  border-radius: 6px;
  display: none;
}

.message.success {
  background: var(--success-bg);
  color: var(--success-text);
  border: 1px solid var(--success-border);
  display: block;
}

.message.error {
  background: var(--error-bg);
  color: var(--error-text);
  border: 1px solid var(--error-border);
  display: block;
}

.melons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.melon-card {
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  transition: all 0.3s ease;
}

.melon-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px var(--card-hover-shadow);
  transform: translateY(-2px);
}

.melon-card h3 {
  color: var(--secondary-color);
  margin-bottom: 10px;
  font-size: 1.3em;
  word-wrap: break-word;
}

.melon-card .content {
  color: var(--text-secondary);
  margin-bottom: 15px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.melon-card .timestamp {
  color: var(--text-muted);
  font-size: 0.85em;
  margin-bottom: 15px;
}

.melon-card .actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.melon-card button {
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.view-button {
  background: var(--secondary-color);
  color: white;
}

.view-button:hover {
  background: #22c55e;
}

.edit-button {
  background: var(--primary-color);
  color: white;
}

.edit-button:hover {
  background: var(--primary-hover);
}

.delete-button {
  background: var(--delete-color);
  color: white;
}

.delete-button:hover {
  background: var(--delete-hover);
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 30px;
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
}

.modal-large {
  max-width: 800px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.modal-header h2 {
  margin: 0;
  flex: 1;
  color: var(--secondary-color);
}

.close-button {
  background: none;
  border: none;
  font-size: 2em;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
  padding: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.3s ease;
}

.close-button:hover {
  color: var(--delete-color);
}

.view-content {
  color: var(--text-secondary);
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
  margin-bottom: 20px;
  font-size: 1.05em;
}

.modal-buttons {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2em;
  }

  .header-content {
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }

  .logo {
    width: 50px;
    height: 50px;
  }

  nav {
    flex-direction: column;
    width: 100%;
  }

  .nav-button {
    width: 100%;
  }

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

  .modal-content {
    width: 95%;
    padding: 20px;
  }

  .melon-card .actions {
    flex-direction: column;
  }

  .melon-card button {
    width: 100%;
  }
}