/* Eppen Tools — developer utility theme */

:root,
[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d1117;
  --bg-elevated: #161b22;
  --bg-input: #0d1117;
  --border: #30363d;
  --border-focus: #58a6ff;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79b8ff;
  --success: #3fb950;
  --error: #f85149;
  --warning: #d29922;
  --mono: 'IBM Plex Mono', 'Noto Sans SC', monospace;
  --sans: 'Noto Sans SC', system-ui, sans-serif;
  --radius: 8px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  --header-bg: rgba(13, 17, 23, 0.85);
  --overlay: rgba(0, 0, 0, 0.55);
  --surface-muted: rgba(0, 0, 0, 0.2);
  --code-bg: rgba(0, 0, 0, 0.25);
  --accent-soft: rgba(88, 166, 255, 0.1);
  --accent-border: rgba(88, 166, 255, 0.25);
  --focus-ring: rgba(88, 166, 255, 0.15);
  --modal-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
  --gradient-1: rgba(88, 166, 255, 0.08);
  --gradient-2: rgba(63, 185, 80, 0.05);
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f6f8fa;
  --bg-elevated: #ffffff;
  --bg-input: #ffffff;
  --border: #d0d7de;
  --border-focus: #0969da;
  --text: #1f2328;
  --text-muted: #656d76;
  --accent: #0969da;
  --accent-hover: #0550ae;
  --success: #1a7f37;
  --error: #cf222e;
  --warning: #9a6700;
  --shadow: 0 8px 24px rgba(140, 149, 159, 0.2);
  --header-bg: rgba(246, 248, 250, 0.9);
  --overlay: rgba(31, 35, 40, 0.45);
  --surface-muted: rgba(175, 184, 193, 0.2);
  --code-bg: rgba(175, 184, 193, 0.25);
  --accent-soft: rgba(9, 105, 218, 0.1);
  --accent-border: rgba(9, 105, 218, 0.25);
  --focus-ring: rgba(9, 105, 218, 0.15);
  --modal-shadow: 0 16px 48px rgba(140, 149, 159, 0.35);
  --gradient-1: rgba(9, 105, 218, 0.07);
  --gradient-2: rgba(26, 127, 55, 0.05);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse at 20% 0%, var(--gradient-1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, var(--gradient-2) 0%, transparent 50%);
}

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

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.container.narrow {
  max-width: 720px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  gap: 16px;
}

.nav:has(.nav-actions):not(:has(.nav-links)) .nav-actions {
  margin-left: auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  color: var(--text);
  text-decoration: none;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 8px 0 auto;
  padding: 0;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text-muted);
  border-radius: 6px;
  text-decoration: none;
  transition: color 0.15s, background 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--bg-elevated);
  text-decoration: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}

.theme-toggle:hover {
  color: var(--text);
  background: var(--bg-elevated);
  border-color: var(--text-muted);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun,
:root:not([data-theme="light"]) .theme-toggle .icon-sun {
  display: block;
}

[data-theme="light"] .theme-toggle .icon-moon {
  display: block;
}

/* Hero & sections */
.hero {
  padding: 48px 0 32px;
  text-align: center;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-tag {
  display: inline-block;
  margin: 0 0 16px;
  padding: 4px 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 999px;
}

.hero-desc {
  max-width: 560px;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 15px;
}

.section {
  padding: 32px 0 64px;
}

.section-title {
  margin: 0 0 24px;
  font-size: 1.25rem;
  font-weight: 600;
}

.page-header {
  padding: 32px 0 24px;
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: 1.75rem;
}

.page-header p {
  margin: 0;
  color: var(--text-muted);
  font-size: 15px;
}

/* Tool grid (home) */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}

.tool-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  text-decoration: none;
  color: inherit;
}

.tool-card-icon {
  font-family: var(--mono);
  font-size: 1.5rem;
  margin-bottom: 12px;
  color: var(--accent);
}

.tool-card h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.tool-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
  flex: 1;
}

.tool-card-arrow {
  margin-top: 16px;
  font-size: 14px;
  color: var(--accent);
}

/* Cards & panels */
.card {
  padding: 20px 24px;
  margin-bottom: 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1rem;
}

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

/* Tool workspace */
.tool-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.tool-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--surface-muted);
  border-bottom: 1px solid var(--border);
}

.tool-body {
  padding: 16px;
}

.tool-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.tool-columns.single {
  grid-template-columns: 1fr;
}

.field-label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}

textarea,
input[type="text"],
input[type="number"] {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  resize: vertical;
  transition: border-color 0.15s;
}

textarea:focus,
input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

textarea {
  min-height: 200px;
}

textarea.output {
  background: var(--code-bg);
}

textarea.error-field {
  border-color: var(--error);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn-primary {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

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

.btn-outline {
  color: var(--text);
  background: transparent;
  border-color: var(--border);
}

.btn-outline:hover {
  background: var(--bg-elevated);
  border-color: var(--text-muted);
}

.btn-outline.active {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* Mode tabs (base64) */
.mode-tabs {
  display: flex;
  gap: 4px;
}

/* Result info */
.result-grid {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.result-item {
  padding: 12px 16px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.result-item label {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.result-item output,
.result-item .result-value {
  font-family: var(--mono);
  font-size: 14px;
  word-break: break-all;
}

.status-msg {
  margin-top: 12px;
  padding: 10px 14px;
  font-size: 13px;
  border-radius: 6px;
}

.status-msg.error {
  color: var(--error);
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid rgba(248, 81, 73, 0.3);
}

.status-msg.success {
  color: var(--success);
  background: rgba(63, 185, 80, 0.1);
  border: 1px solid rgba(63, 185, 80, 0.3);
}

.status-msg[hidden] {
  display: none;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  padding: 10px 20px;
  font-size: 14px;
  color: var(--text);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: transform 0.25s, opacity 0.25s;
  z-index: 1000;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Help text */
.help-block {
  margin-top: 24px;
  padding: 20px 24px;
  font-size: 14px;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.help-block h2 {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--text);
}

.help-block ul {
  margin: 0;
  padding-left: 20px;
}

.help-block li {
  margin-bottom: 6px;
}

/* Footer */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

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

.footer-note {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

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

.footer-note a:hover {
  color: var(--accent);
}

.ad-slot {
  margin: 16px 0;
  min-height: 0;
}

.ad-slot[hidden] {
  display: none;
}

.cron-table {
  width: 100%;
  margin-top: 16px;
  border-collapse: collapse;
  font-size: 14px;
}

.cron-table th,
.cron-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.cron-table th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.cron-table code {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
}

.cron-runs {
  margin: 16px 0 0;
  padding-left: 20px;
}

.cron-runs li {
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 13px;
}

.cron-runs code {
  color: var(--text);
}

/* Input group with addon button */
.input-group {
  display: flex;
  align-items: stretch;
  width: 100%;
}

.input-group input[type="text"] {
  flex: 1;
  min-width: 0;
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  border-right: none;
}

.input-group input[type="text"]:focus {
  z-index: 1;
  border-right: 1px solid var(--border-focus);
}

.input-group-addon {
  flex-shrink: 0;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  border-left: none;
  padding: 8px 14px;
  white-space: nowrap;
}

.input-group-addon .addon-icon {
  font-size: 16px;
  line-height: 1;
}

.input-group-addon .addon-text {
  margin-left: 6px;
}

@media (max-width: 480px) {
  .input-group-addon .addon-text {
    display: none;
  }

  .input-group-addon {
    padding: 8px 12px;
  }
}

/* Cron builder modal */
.cron-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.cron-modal[hidden] {
  display: none;
}

.cron-modal-backdrop {
  position: absolute;
  inset: 0;
  background: var(--overlay);
}

.cron-modal-dialog {
  position: relative;
  width: 100%;
  max-width: 820px;
  max-height: calc(100vh - 32px);
  display: flex;
  flex-direction: column;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--modal-shadow);
}

.cron-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.cron-modal-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.cron-modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  font-size: 22px;
  line-height: 1;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.cron-modal-close:hover {
  color: var(--text);
  background: var(--bg-input);
}

.cron-modal-body {
  padding: 20px;
  overflow-y: auto;
}

.cron-modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
}

/* Cron builder */
.cron-builder {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cron-field-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  border-bottom: 1px solid var(--border);
}

.cron-field-tab {
  padding: 10px 16px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.cron-field-tab:hover {
  color: var(--text);
  background: var(--surface-muted);
}

.cron-field-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: var(--accent-soft);
}

.cron-tab-panels {
  min-height: 220px;
}

.cron-tab-panel {
  display: none;
}

.cron-tab-panel.active {
  display: block;
}

.cron-section {
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-input);
}

.cron-radio-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.6;
  cursor: pointer;
}

.cron-radio-row:last-child {
  margin-bottom: 0;
}

.cron-radio-row input[type="radio"] {
  accent-color: var(--accent);
}

.cron-inline-input {
  width: 72px;
  padding: 6px 8px;
  font-family: var(--mono);
  font-size: 13px;
}

.cron-specific-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
  max-height: 180px;
  overflow-y: auto;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.cron-specific-grid[hidden] {
  display: none !important;
}

.cron-specific-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-width: 52px;
  padding: 4px 8px;
  font-size: 13px;
  font-family: var(--mono);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  user-select: none;
}

.cron-specific-item:has(input:checked) {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.cron-output {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 16px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.cron-output-title {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 600;
}

.cron-output-desc {
  margin: 0 0 8px;
  font-size: 13px;
}

.cron-output-main {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cron-output-main .cron-expr-preview {
  margin: 0;
}

.cron-help-list {
  margin: 0;
  padding-left: 18px;
  font-size: 13px;
  color: var(--text-muted);
}

.cron-help-list li {
  margin-bottom: 4px;
}

.cron-builder-runs {
  padding: 14px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.cron-runs-inline {
  margin: 0;
  padding-left: 20px;
}

.cron-runs-inline li {
  margin-bottom: 6px;
  font-size: 13px;
}

.cron-expr-preview {
  flex: 1;
  min-width: 200px;
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--accent);
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

@media (max-width: 768px) {
  .cron-output {
    grid-template-columns: 1fr;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    margin: 0;
    padding: 12px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav {
    position: relative;
  }

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

  .hero {
    padding: 32px 0 24px;
  }
}