@font-face { font-family: 'Inter'; src: url('../fonts/Inter-Regular.ttf'); font-weight: 400; }
@font-face { font-family: 'Inter'; src: url('../fonts/Inter-Medium.ttf'); font-weight: 500; }
@font-face { font-family: 'Inter'; src: url('../fonts/Inter-SemiBold.ttf'); font-weight: 600; }
@font-face { font-family: 'Inter'; src: url('../fonts/Inter-Bold.ttf'); font-weight: 700; }
@font-face { font-family: 'Bricolage Grotesque'; src: url('../fonts/BricolageGrotesque-SemiBold.ttf'); font-weight: 600; }
@font-face { font-family: 'Bricolage Grotesque'; src: url('../fonts/BricolageGrotesque-Bold.ttf'); font-weight: 700; }
@font-face { font-family: 'Bricolage Grotesque'; src: url('../fonts/BricolageGrotesque-ExtraBold.ttf'); font-weight: 800; }
@font-face { font-family: 'JetBrains Mono'; src: url('../fonts/JetBrainsMono-Regular.ttf'); font-weight: 400; }
@font-face { font-family: 'JetBrains Mono'; src: url('../fonts/JetBrainsMono-Medium.ttf'); font-weight: 500; }

:root {
  --color-text-primary: #141824;
  --color-text-secondary: #5c6172;
  --color-text-tertiary: #7c828f;
  --color-text-muted: #949aac;
  --color-text-faint: #b4b9c4;
  --color-primary: #2f5cff;
  --color-primary-dark: #2246e0;
  --color-primary-deep: #1e3a9e;
  --color-primary-tint: #e9eeff;
  --color-primary-tint-strong: #dbe6fe;
  --color-cyan: #08c8e6;
  --surface-page: #eef1f5;
  --surface-card: #fff;
  --surface-subtle: #fafbfc;
  --surface-hover: #f4f6fa;
  --border-default: #e5e7eb;
  --border-strong: #d5d8de;
  --border-subtle: #e8eaee;
  --gradient-brand: linear-gradient(180deg, var(--color-cyan) 0%, var(--color-primary) 100%);
  --font-display: 'Bricolage Grotesque', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-body: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --radius-sm: 6px;
  --radius-md: 9px;
  --radius-lg: 12px;
  --radius-xl: 14px;
  --space-1: 4px;
  --space-1-5: 6px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --shadow-btn: 0 1px 2px rgba(0, 0, 0, 0.09);
  --color-danger: #dc2626;
  --color-danger-tint: #fbeaea;
  --color-danger-strong-text: #991b1b;
  --ring-focus: 0 0 0 3px var(--color-primary-tint-strong);
  --ring-error: 0 0 0 3px var(--color-danger-tint);
  --motion-fast: 120ms ease;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  min-width: 320px;
  margin: 0;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 140%;
  color: var(--color-text-primary);
  background: var(--surface-page);
}

button,
input {
  font-family: var(--font-body);
}

.is-hidden {
  display: none !important;
}

.copy-fallback {
  position: fixed;
  top: -1000px;
  opacity: 0;
}

.app-shell {
  display: flex;
  height: 100vh;
  background: var(--surface-page);
}

.app-shell__sidebar {
  display: flex;
  flex: 0 0 58px;
  justify-content: center;
  padding-top: var(--space-4);
  background: var(--surface-card);
  border-right: 1px solid var(--border-default);
}

.app-shell__logo {
  display: block;
}

.app-shell__logo-cell {
  fill: none;
  stroke: var(--color-primary);
}

.app-shell__logo-node {
  fill: var(--color-primary);
}

.app-shell__content {
  flex: 1;
  min-width: 0;
  padding: var(--space-6);
  overflow-y: auto;
}

.app-header {
  position: relative;
  overflow: hidden;
  margin: 2px 0 var(--space-4);
  background: var(--surface-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
}

.app-header::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--gradient-brand);
}

.app-header__top {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 30px var(--space-6);
}

.app-header__eyebrow {
  margin: 0 0 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.app-header__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 27px;
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--color-text-primary);
}

.app-header__title strong {
  font-weight: 700;
}

.app-header__subtitle {
  margin: 5px 0 0;
  font-size: 13.5px;
  color: var(--color-text-secondary);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: var(--space-4);
  align-items: start;
}

.panel {
  padding: var(--space-6);
  background: var(--surface-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
}

.panel__eyebrow {
  margin: 0 0 var(--space-5);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1-5);
}

.form__field label {
  font-size: 12px;
  font-weight: 600;
  line-height: 100%;
  color: var(--color-text-primary);
}

.form__field input {
  width: 100%;
  height: 36px;
  padding: 0 var(--space-3);
  background: var(--surface-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 13px;
  color: var(--color-text-primary);
  transition: border-color var(--motion-fast), box-shadow var(--motion-fast);
}

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

.form__field input:hover {
  border-color: var(--border-strong);
}

.form__field input:focus {
  border-color: var(--color-primary);
  box-shadow: var(--ring-focus);
}

.form__field--invalid input,
.form__field--invalid input:hover {
  border-color: var(--color-danger);
}

.form__field--invalid input:focus {
  border-color: var(--color-danger);
  box-shadow: var(--ring-error);
}

.form__error {
  margin: 0;
  font-size: 12px;
  line-height: 140%;
  color: var(--color-danger-strong-text);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1-5);
  height: 40px;
  padding: 0 var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: 12px;
  font-weight: 700;
  line-height: 100%;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--motion-fast), border-color var(--motion-fast), box-shadow var(--motion-fast);
}

.button:focus-visible {
  outline: none;
  box-shadow: var(--ring-focus);
}

.button--primary {
  margin-top: var(--space-6);
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-btn);
}

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

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

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

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

.button--accent:active {
  background: var(--color-primary-deep);
}

.button--outline {
  background: var(--surface-card);
  border-color: var(--border-default);
  color: var(--color-text-primary);
}

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

.button--outline:active {
  border-color: var(--border-strong);
}

.preview__stage {
  min-height: 240px;
  padding: var(--space-5);
  background: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

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

.preview__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.help {
  margin-top: var(--space-4);
}

.help__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 120%;
  letter-spacing: -0.02em;
}

.help__subtitle {
  margin: 0 0 var(--space-5);
  color: var(--color-text-secondary);
}

.accordion__item {
  margin-bottom: var(--space-3);
}

.accordion__item:last-child {
  margin-bottom: 0;
}

.accordion__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  min-height: 46px;
  padding: 0 var(--space-3);
  background: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--color-primary-dark);
  font-size: 14px;
  font-weight: 600;
  line-height: 130%;
  text-align: left;
  cursor: pointer;
  transition: background var(--motion-fast), border-color var(--motion-fast), box-shadow var(--motion-fast);
}

.accordion__header:hover {
  background: var(--surface-hover);
  border-color: var(--border-default);
}

.accordion__header:focus-visible {
  outline: none;
  box-shadow: var(--ring-focus);
}

.accordion__icon {
  display: inline-flex;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  transform: rotate(-90deg);
  transition: transform 200ms ease;
}

.accordion__item.is-active .accordion__icon {
  transform: rotate(0deg);
}

.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 200ms ease;
}

.accordion__item.is-active .accordion__panel {
  grid-template-rows: 1fr;
}

.accordion__content {
  min-height: 0;
  overflow: hidden;
  visibility: hidden;
  transition: visibility 0s linear 200ms;
}

.accordion__item.is-active .accordion__content {
  visibility: visible;
  transition-delay: 0s;
}

.accordion__body {
  padding: var(--space-3) var(--space-1) var(--space-1);
  font-size: 14px;
  color: var(--color-text-secondary);
}

.accordion__body p {
  margin: 0 0 var(--space-3);
}

.accordion__body strong {
  color: var(--color-text-primary);
}

.accordion__body ol,
.accordion__body ul {
  margin: 0 0 var(--space-3);
  padding-left: 20px;
}

.accordion__body li {
  margin-bottom: var(--space-2);
}

.accordion__note {
  padding: var(--space-3);
  background: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.accordion__note p:last-child {
  margin-bottom: 0;
}

@media (prefers-reduced-motion: reduce) {
  .accordion__icon,
  .accordion__panel,
  .accordion__content {
    transition: none;
  }
}

@media (max-width: 800px) {
  .workspace {
    grid-template-columns: minmax(0, 1fr);
  }

  .app-shell__sidebar {
    display: none;
  }
}