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

:root {
  --color-bg: #fafaf8;
  --color-surface: #ffffff;
  --color-text: #2d2d2d;
  --color-text-secondary: #666;
  --color-accent: #c0694a;
  --color-accent-hover: #a85838;
  --color-border: #e8e5e0;
  --color-sidebar-bg: #f5f3ef;
  --color-active: #ece8e1;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

html {
  font-size: 16px;
}

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
}

/* Header */
header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#user-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s;
}

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

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

.btn-small {
  padding: 0.25rem 0.75rem;
  font-size: 0.8rem;
  background: var(--color-sidebar-bg);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-small:hover {
  background: var(--color-active);
}

/* Login screen */
.login-card {
  max-width: 360px;
  margin: 6rem auto;
  padding: 3rem 2rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}

.login-card h2 {
  margin-bottom: 0.5rem;
  font-size: 1.5rem;
}

.login-card p {
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

/* Layout */
.layout {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: calc(100vh - 56px);
}

/* Sidebar */
#sidebar {
  background: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-border);
  padding: 1rem;
  overflow-y: auto;
  height: calc(100vh - 56px);
  position: sticky;
  top: 56px;
}

.search-box {
  margin-bottom: 1rem;
}

.search-box input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  background: var(--color-surface);
  outline: none;
  font-family: var(--font);
}

.search-box input:focus {
  border-color: var(--color-accent);
}

#categories {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.category-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.4rem 0.75rem;
  background: none;
  border: none;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background 0.1s;
  font-family: var(--font);
}

.category-btn:hover {
  background: var(--color-active);
}

.category-btn.active {
  background: var(--color-accent);
  color: white;
}

#recipe-list {
  list-style: none;
}

#recipe-list li {
  margin-bottom: 1px;
}

#recipe-list button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.5rem 0.75rem;
  background: none;
  border: none;
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.1s;
  font-family: var(--font);
}

#recipe-list button:hover {
  background: var(--color-active);
}

#recipe-list button.active {
  background: var(--color-active);
  font-weight: 600;
}

/* Recipe content */
#recipe-content {
  padding: 2rem 3rem;
  max-width: 800px;
}

#recipe-placeholder {
  margin-top: 4rem;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 1.1rem;
}

/* Recipe markdown rendering */
#recipe-detail h1 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: var(--color-accent);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 0.5rem;
}

#recipe-detail h2 {
  font-size: 1.3rem;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
}

#recipe-detail h3 {
  font-size: 1.1rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

#recipe-detail p {
  margin-bottom: 0.75rem;
}

#recipe-detail ul,
#recipe-detail ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

#recipe-detail li {
  margin-bottom: 0.35rem;
}

#recipe-detail strong {
  font-weight: 600;
}

#recipe-detail hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 1.5rem 0;
}

/* Recipe form / edit */
.btn-block {
  display: block;
  width: 100%;
  text-align: center;
  margin-bottom: 1rem;
}

.recipe-actions {
  margin-bottom: 1rem;
}

.recipe-textarea {
  width: 100%;
  min-height: 400px;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  resize: vertical;
  background: var(--color-surface);
}

.recipe-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
  margin-top: 0.75rem;
}

.form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-family: var(--font);
  background: var(--color-surface);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  align-items: center;
}

.form-message {
  margin-top: 0.75rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
}

.form-message-success {
  background: #e8f5e9;
  color: #2e7d32;
}

.form-message-error {
  background: #fbe9e7;
  color: #c62828;
}

/* Loading */
#loading {
  display: flex;
  justify-content: center;
  padding-top: 6rem;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Utilities */
.hidden {
  display: none !important;
}

/* Mobile responsive */
@media (max-width: 768px) {
  .layout {
    grid-template-columns: 1fr;
  }

  #sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem;
  }

  #categories {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.35rem;
  }

  .category-btn {
    width: auto;
    padding: 0.3rem 0.75rem;
    font-size: 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: var(--color-surface);
  }

  .category-btn.active {
    border-color: var(--color-accent);
  }

  #recipe-list {
    max-height: 200px;
    overflow-y: auto;
  }

  #recipe-content {
    padding: 1.25rem 1rem;
  }

  #recipe-detail h1 {
    font-size: 1.4rem;
  }

  .header-inner {
    padding: 0.5rem 1rem;
  }

  #user-name {
    display: none;
  }
}