:root {
  --font-ui: "IBM Plex Sans", Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #f4f5f7;
  --bg-elevated: rgba(255, 255, 255, 0.84);
  --bg-panel: #ffffff;
  --bg-soft: #f7f8fa;
  --text: #15171b;
  --text-soft: #616a78;
  --line: rgba(16, 24, 40, 0.08);
  --line-strong: rgba(16, 24, 40, 0.14);
  --accent: #1f6fff;
  --accent-soft: rgba(31, 111, 255, 0.10);
  --danger: #c13333;
  --success: #00875a;
  --shadow-lg: 0 20px 50px rgba(18, 24, 40, 0.08);
  --shadow-md: 0 12px 28px rgba(18, 24, 40, 0.06);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --container: 1220px;
  --gap: 24px;
  --transition: 180ms ease;
}

html[data-theme="dark"] {
  --bg: #0d1117;
  --bg-elevated: rgba(19, 24, 33, 0.86);
  --bg-panel: #111722;
  --bg-soft: #0f141d;
  --text: #f2f4f8;
  --text-soft: #97a2b3;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --accent: #78a6ff;
  --accent-soft: rgba(120, 166, 255, 0.12);
  --danger: #ff7373;
  --success: #42c08a;
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.28);
  --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
}

body {
  position: relative;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: auto;
  pointer-events: none;
  filter: blur(72px);
  opacity: 0.55;
  z-index: 0;
}

body::before {
  top: -110px;
  right: -70px;
  width: 320px;
  height: 320px;
  background: rgba(80, 145, 255, 0.18);
}

body::after {
  left: -80px;
  bottom: -40px;
  width: 300px;
  height: 300px;
  background: rgba(80, 145, 255, 0.12);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

.app {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 28px 20px 44px;
}

.shell {
  width: min(100%, var(--container));
  margin: 0 auto;
}

.grid {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: var(--gap);
  align-items: start;
}

@media (max-width: 1040px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.panel--solid {
  background: var(--bg-panel);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.sidebar {
  position: sticky;
  top: 20px;
  padding: 18px;
  display: grid;
  gap: 16px;
}

@media (max-width: 1040px) {
  .sidebar {
    position: static;
  }
}

.brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 6px 4px 2px;
}

.brand__title-link {
  display: inline-block;
}

.brand__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.theme-toggle {
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 999px;
  min-width: 64px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 12px;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
}

.theme-toggle__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  color: var(--text-soft);
  transition: color var(--transition), opacity var(--transition);
}

.theme-toggle__icon svg {
  width: 18px;
  height: 18px;
}

.theme-toggle__icon--sun {
  color: var(--accent);
  opacity: 1;
}

.theme-toggle__icon--moon {
  opacity: 0.45;
}

html[data-theme="dark"] .theme-toggle__icon--sun {
  color: var(--text-soft);
  opacity: 0.45;
}

html[data-theme="dark"] .theme-toggle__icon--moon {
  color: var(--accent);
  opacity: 1;
}

.nav {
  display: grid;
  gap: 10px;
}

.nav__item {
  width: 100%;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  border-radius: 18px;
  padding: 14px 14px 14px 16px;
  text-align: left;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.nav__item:hover {
  background: var(--bg-soft);
  border-color: var(--line);
  transform: translateY(-1px);
}

.nav__item.is-active {
  background: var(--accent-soft);
  border-color: rgba(31, 111, 255, 0.18);
}

.nav__label {
  display: block;
  font-weight: 600;
  margin-bottom: 2px;
}

.nav__hint {
  display: block;
  font-size: 13px;
  color: var(--text-soft);
}

.sidebar__footer {
  display: grid;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.sidebar-note {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--bg-soft);
  padding: 14px;
  font-size: 13px;
  color: var(--text-soft);
}

.content {
  padding: 24px;
  min-height: 780px;
}

@media (max-width: 720px) {
  .content {
    padding: 18px;
  }
}

.toolbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  padding: 2px 2px 10px;
}

@media (max-width: 760px) {
  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }
}

.toolbar__title {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.02;
  font-weight: 700;
  letter-spacing: -0.05em;
}

.toolbar__text {
  margin: 8px 0 0;
  color: var(--text-soft);
  font-size: 15px;
  max-width: 780px;
}

.toolbar__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-soft);
  white-space: nowrap;
}

.stack {
  display: grid;
  gap: 18px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--bg-panel);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.card__header {
  padding: 22px 22px 0;
}

.card__title {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.card__title--small {
  font-size: 20px;
}

.card__body {
  padding: 22px;
  display: grid;
  gap: 18px;
}

.choice-list {
  display: grid;
  gap: 12px;
}

.choice-list--grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 860px) {
  .choice-list--grid-2 {
    grid-template-columns: 1fr;
  }
}

.choice {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.choice--link {
  display: block;
}

.choice:hover {
  transform: translateY(-1px);
  border-color: rgba(31, 111, 255, 0.20);
  background: color-mix(in srgb, var(--bg-soft) 84%, var(--accent-soft));
}

.choice__title {
  display: block;
  font-weight: 600;
  margin-bottom: 3px;
}

.choice__text {
  display: block;
  font-size: 13px;
  color: var(--text-soft);
}

.notice-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px;
  border-radius: 20px;
  border: 1px solid rgba(31, 111, 255, 0.16);
  background: var(--accent-soft);
  margin-bottom: 2px;
}

@media (max-width: 760px) {
  .notice-card {
    flex-direction: column;
    align-items: flex-start;
  }
}

.notice-card__copy {
  font-size: 14px;
  color: var(--text);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

@media (max-width: 760px) {
  .field-grid {
    grid-template-columns: 1fr;
  }
}

.field {
  display: grid;
  gap: 10px;
}

.field--full {
  grid-column: 1 / -1;
}

.field__label {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.field__required {
  color: var(--danger);
}

.field__hint {
  font-size: 13px;
  color: var(--text-soft);
  margin-top: -4px;
}

.field__error {
  font-size: 13px;
  color: var(--danger);
}

.control,
.textarea {
  width: 100%;
  border-radius: 16px;
  border: 1px solid var(--line-strong);
  background: var(--bg-soft);
  color: var(--text);
  padding: 15px 16px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.control::placeholder,
.textarea::placeholder {
  color: var(--text-soft);
}

.control:focus,
.textarea:focus {
  border-color: rgba(31, 111, 255, 0.45);
  box-shadow: 0 0 0 4px rgba(31, 111, 255, 0.10);
  background: var(--bg-panel);
}

.textarea {
  min-height: 120px;
  resize: vertical;
}

.is-invalid {
  border-color: rgba(193, 51, 51, 0.55);
  box-shadow: 0 0 0 4px rgba(193, 51, 51, 0.08);
}

.hp-field {
  position: absolute !important;
  left: -9999px !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 6px;
}

.actions--end {
  justify-content: flex-end;
}

.button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  appearance: none;
  border: 0;
  border-radius: 16px;
  padding: 14px 18px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn--secondary {
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--line);
}

.btn--ghost {
  background: transparent;
  color: var(--text-soft);
  border: 1px solid var(--line);
}

.flash {
  border-radius: 18px;
  padding: 16px 18px;
  margin-bottom: 18px;
  border: 1px solid transparent;
  font-size: 14px;
}

.flash--success {
  background: rgba(0, 135, 90, 0.10);
  border-color: rgba(0, 135, 90, 0.18);
  color: var(--text);
}

.flash--error {
  background: rgba(193, 51, 51, 0.10);
  border-color: rgba(193, 51, 51, 0.18);
  color: var(--text);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

@media (max-width: 760px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }
}

.summary-card {
  border-radius: 20px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  padding: 16px;
}

.summary-card__title {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 700;
}

.summary-list {
  display: grid;
  gap: 8px;
}

.summary-item {
  display: grid;
  gap: 3px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

.summary-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.summary-item__key {
  font-size: 12px;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.summary-item__value {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  word-break: break-word;
}

.empty-state {
  margin: 0;
  color: var(--text-soft);
}