/* =====================================================
   UUID Generator — uuid-generator.css
   Chedders Tools · Bootstrap 5 base
   ===================================================== */

/* --- Base & Variables --- */
:root {
  --primary: #0b1f3a;
  --primary-light: #16345f;
  --background: #ffffff;
  --surface: #f8f9fa;
  --text: #111111;
  --muted: #6c757d;
  --border: #e5e7eb;
  --shadow: rgba(0,0,0,0.05);
}

[data-theme="dark"] {
  --background: #081120;
  --surface: #0f1c2e;
  --text: #ffffff;
  --muted: #b0b7c3;
  --border: rgba(255,255,255,0.08);
  --shadow: rgba(0,0,0,0.3);
}

/* --- Layout Foundation --- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--background);
  margin: 0;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.container-xl {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navbar --- */
.navbar {
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.navbar .container-xl {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.navbar-brand {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 1px;
}

.brand-text {
  font-weight: 700;
  color: var(--primary);
  font-size: 16px;
}

.brand-dot {
  color: var(--primary);
  font-weight: 700;
  font-size: 16px;
}

.brand-tools {
  font-weight: 400;
  color: var(--muted);
  font-size: 16px;
}

[data-theme="dark"] .brand-text,
[data-theme="dark"] .brand-dot {
  color: #ffffff;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-back {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-back:hover {
  color: var(--primary);
}

[data-theme="dark"] .nav-back:hover {
  color: #ffffff;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
}

.theme-toggle:hover {
  background: var(--background);
}

.theme-icon {
  font-size: 14px;
  line-height: 1;
  display: block;
}

/* --- Page Header --- */
.tool-header {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--border);
}

.tool-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
  line-height: 1.2;
  transition: color 0.25s ease;
}

[data-theme="dark"] .tool-title {
  color: #ffffff;
}

.tool-description {
  font-size: 15px;
  color: var(--muted);
  margin: 6px 0 0;
}

/* --- Tool Main --- */
.tool-main {
  padding: 32px 0 80px;
}

/* --- Tool Card --- */
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  box-shadow: 0 2px 8px var(--shadow);
  max-width: 860px;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

/* --- Controls Row --- */
.controls-row {
  display: flex;
  align-items: flex-end;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

/* --- Number Input --- */
.number-input {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 14px;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  width: 120px;
  height: 44px;
  transition: border-color 0.2s, background-color 0.25s ease;
  outline: none;
}

.number-input:focus {
  border-color: var(--primary);
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* --- Toggle Group --- */
.toggle-group {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.toggle-btn {
  background: var(--background);
  border: none;
  padding: 0 16px;
  height: 44px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

.toggle-btn:not(:last-child) {
  border-right: 1px solid var(--border);
}

.toggle-btn.active {
  background: var(--primary);
  color: #ffffff;
}

.toggle-btn:not(.active):hover {
  background: var(--surface);
  color: var(--text);
}

/* --- Button Row --- */
.btn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.btn-primary-tool {
  background: var(--primary);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 10px 24px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
  transition: background-color 0.2s;
}

.btn-primary-tool:hover {
  background: var(--primary-light);
}

.btn-secondary-tool {
  background: var(--background);
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 6px;
  padding: 10px 24px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
  transition: background-color 0.2s, color 0.2s;
}

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

[data-theme="dark"] .btn-secondary-tool {
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .btn-secondary-tool:hover {
  background: var(--primary-light);
  color: #ffffff;
  border-color: var(--primary-light);
}

/* --- Output Section --- */
.output-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.output-meta {
  font-size: 13px;
  color: var(--muted);
  min-height: 18px;
}

.output-box {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  min-height: 120px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 15px;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.output-placeholder {
  color: var(--muted);
  font-family: inherit;
}

/* --- UUID List --- */
.uuid-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.uuid-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.15s;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
}

.uuid-item:hover {
  background: var(--surface);
}

.uuid-value {
  flex: 1;
  word-break: break-all;
}

.uuid-copy-hint {
  font-size: 11px;
  font-weight: 400;
  color: var(--muted);
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.15s;
  font-family: inherit;
}

.uuid-item:hover .uuid-copy-hint {
  opacity: 1;
}

.uuid-copied-badge {
  font-size: 11px;
  font-weight: 600;
  color: #22863a;
  white-space: nowrap;
  font-family: inherit;
}

[data-theme="dark"] .uuid-copied-badge {
  color: #56d364;
}

/* --- Footer --- */
.site-footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  transition: border-color 0.25s ease;
}

.footer-text {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  margin: 0;
}

.footer-text a {
  color: var(--primary);
  text-decoration: none;
}

[data-theme="dark"] .footer-text a {
  color: #ffffff;
}

.footer-text a:hover {
  text-decoration: underline;
}

/* --- Responsive --- */
@media (max-width: 575px) {
  .tool-card {
    padding: 16px;
  }

  .tool-title {
    font-size: 22px;
  }

  .btn-primary-tool,
  .btn-secondary-tool {
    width: 100%;
  }

  .controls-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .number-input {
    width: 100%;
  }
}