:root {
  color-scheme: light;
  --bg: #eef1f4;
  --surface: #ffffff;
  --surface-soft: #f7f9fb;
  --line: #d9e0e7;
  --line-strong: #c2ccd6;
  --text: #17202a;
  --muted: #667382;
  --primary: #1f6f8b;
  --primary-strong: #164f63;
  --accent: #8a5a1f;
  --ok: #237247;
  --ok-bg: #e9f6ef;
  --error: #a53b32;
  --error-bg: #fff0ee;
  --idle-bg: #f2f5f8;
  --shadow: 0 18px 48px rgba(23, 32, 42, 0.10);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 360px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Hiragino Sans", sans-serif;
  color: var(--text);
  background:
    linear-gradient(90deg, rgba(31, 111, 139, 0.06), transparent 34%),
    linear-gradient(180deg, #fbfcfd 0%, var(--bg) 100%);
}

body.quick-modal-open {
  overflow: hidden;
}

.app {
  min-height: 100vh;
  padding: 18px;
}

.shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 14px;
  width: min(1680px, 100%);
  min-height: calc(100vh - 36px);
  margin: 0 auto;
}

.app-header {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(280px, 520px) auto;
  gap: 16px;
  align-items: center;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 10px 28px rgba(23, 32, 42, 0.06);
}

.eyebrow {
  margin: 0 0 3px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 1.45rem;
  line-height: 1.1;
}

h2 {
  font-size: 0.92rem;
  color: #2a3745;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(380px, 440px) minmax(0, 1fr);
  gap: 14px;
  min-height: 0;
  align-items: stretch;
}

.control-column,
.plot-column {
  min-width: 0;
}

.control-column {
  display: grid;
  grid-template-rows: auto auto auto minmax(0, 1fr);
  gap: 12px;
  min-height: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
}

.plot-column {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 12px;
  min-height: 0;
}

.control-block,
.quick-form-shell,
.plot-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.control-block,
.quick-form-shell {
  padding: 12px;
}

.block-header,
.plot-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.plot-toolbar {
  min-height: 42px;
  padding: 0 4px;
  margin: 0;
}

.actions {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
}

button {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 8px 12px;
  background: var(--primary);
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, transform 120ms ease;
}

button:hover:not(:disabled) {
  background: var(--primary-strong);
}

button:active:not(:disabled) {
  transform: translateY(1px);
}

button:disabled {
  opacity: 0.52;
  cursor: default;
}

.material-symbols-outlined {
  font-size: 19px;
  line-height: 1;
}

.ghost-button,
.detail-toggle {
  border-color: var(--line-strong);
  background: #f8fafb;
  color: #263542;
}

.ghost-button:hover:not(:disabled),
.detail-toggle:hover:not(:disabled) {
  background: #eef3f6;
}

.app-header .ghost-button {
  width: 38px;
  padding: 0;
}

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

.option-check {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 10px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-soft);
  color: #344252;
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.35;
}

.option-check input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--primary);
  flex: 0 0 auto;
}

.picker-row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.file-label {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.86rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.status {
  min-width: 0;
  padding: 10px 12px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: 0.92rem;
  font-weight: 700;
}

.status-idle {
  background: var(--idle-bg);
  border-color: var(--line);
}

.status-ok {
  color: var(--ok);
  background: var(--ok-bg);
  border-color: #b9dec8;
}

.status-error {
  color: var(--error);
  background: var(--error-bg);
  border-color: #efc5bf;
}

.meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.mini-status {
  min-width: 0;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: 0.82rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mini-status-idle {
  background: var(--idle-bg);
  border-color: var(--line);
  color: #4c5a68;
}

.mini-status-ok {
  color: var(--ok);
  background: var(--ok-bg);
  border-color: #b9dec8;
}

.mini-status-error {
  color: var(--error);
  background: var(--error-bg);
  border-color: #efc5bf;
}

.diagnostics {
  color: var(--muted);
  font-size: 0.78rem;
}

.diagnostics summary {
  width: fit-content;
  cursor: pointer;
  user-select: none;
}

.diagnostics-list {
  display: grid;
  gap: 6px;
  margin-top: 8px;
}

.diagnostics .mini-status {
  padding: 6px 8px;
  font-size: 0.76rem;
}

.quick-form-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 0;
  min-height: 0;
}

.quick-form-list {
  display: grid;
  align-content: start;
  gap: 7px;
  min-height: 0;
  overflow: auto;
  padding-right: 4px;
}

.quick-form-row {
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-soft);
}

.quick-form-main {
  display: grid;
  grid-template-columns: minmax(132px, 1fr) 126px 86px;
  gap: 8px;
  align-items: center;
}

.quick-form-key {
  min-width: 0;
  color: #344252;
  font-size: 0.83rem;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.quick-form-inline {
  display: flex;
  gap: 7px;
  align-items: center;
  flex-wrap: nowrap;
  min-width: 0;
}

.unit-label {
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1;
  white-space: nowrap;
}

.quick-form-inline input[type="number"],
.quick-form-inline input[type="text"],
.field input[type="text"],
.field input[type="number"],
.field select,
.field textarea {
  width: 100%;
  min-height: 32px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: white;
  color: var(--text);
  font: inherit;
}

.quick-form-inline input[type="number"],
.quick-form-inline input[type="text"] {
  min-width: 0;
  padding: 5px 7px;
}

.field {
  display: grid;
  gap: 5px;
}

.field label,
.field legend {
  color: #475768;
  font-size: 0.78rem;
  font-weight: 700;
}

.field input[type="text"],
.field input[type="number"],
.field select,
.field textarea {
  padding: 5px 7px;
}

.quick-detail {
  display: grid;
  gap: 8px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.quick-detail[hidden] {
  display: none;
}

.quick-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.quick-detail-summary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  height: 26px;
  padding: 3px 8px;
  border: 1px solid #d4c9ba;
  border-radius: 999px;
  background: #fbf5ec;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 700;
  text-align: center;
  white-space: nowrap;
}

.quick-form-composition {
  display: grid;
  gap: 10px;
}

.plots {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: minmax(320px, 1fr) minmax(320px, 1fr);
  gap: 14px;
  min-height: 0;
}

.plot-card {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-height: 0;
  padding: 12px;
  box-shadow: var(--shadow);
}

.plot-card:nth-child(3) {
  grid-column: 1 / -1;
}

.plot-header {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  min-height: 34px;
  margin-bottom: 8px;
}

.plot-header h2 {
  font-size: 0.98rem;
}

.plot-note {
  color: var(--muted);
  font-size: 0.77rem;
}

.plot-mode-select {
  width: 98px;
  min-height: 32px;
  padding: 5px 7px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  background: white;
  color: var(--text);
  font: inherit;
}

.plot-empty {
  display: grid;
  place-items: center;
  min-height: 260px;
  border: 1px dashed var(--line-strong);
  border-radius: 6px;
  color: var(--muted);
  background: #f9fbfc;
}

.plot-host {
  width: 100%;
  height: 100%;
  min-height: 300px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
  overflow: hidden;
}

.preview,
.form-shell,
.form-intro,
.form-grid,
.field-group,
.field-stack,
.fieldset-inline,
.field-row,
.choice-row,
.atom-table,
.atom-row,
.form-actions,
.quick-form-note,
.quick-form-actions {
  display: none;
}

.quick-modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 24px;
}

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

.quick-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(23, 32, 42, 0.46);
}

.quick-modal-panel {
  position: relative;
  z-index: 1;
  width: fit-content;
  max-width: calc(100vw - 48px);
  max-height: calc(100vh - 48px);
  overflow: auto;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.quick-modal-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.quick-modal-header h2 {
  font-size: 1rem;
}

.quick-modal-header p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.quick-modal-close {
  flex: 0 0 auto;
}

.quick-composition-grid {
  display: grid;
  grid-template-columns: 240px max-content;
  gap: 10px;
  align-items: start;
}

.quick-composition-panel {
  display: grid;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
  align-self: start;
}

.quick-composition-panel-atoms,
.quick-composition-panel-periodic {
  height: 470px;
}

.quick-composition-panel-atoms {
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
}

.quick-composition-header {
  display: grid;
  gap: 4px;
}

.quick-composition-header h2 {
  font-size: 0.92rem;
}

.quick-composition-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.quick-atom-selection-list {
  display: grid;
  align-content: start;
  gap: 2px;
  min-height: 0;
  overflow-y: auto;
  padding-right: 4px;
}

.quick-atom-row {
  display: grid;
  grid-template-columns: 25px minmax(0, 1fr) 28px;
  gap: 8px;
  align-items: center;
  padding: 3px;
}

.quick-atom-chip {
  display: grid;
  place-items: center;
  width: 25px;
  height: 25px;
  min-height: 25px;
  border-radius: 4px;
  background: #e5eef3;
  color: #263542;
}

.quick-atom-symbol {
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1;
}

.quick-atom-row .field {
  gap: 0;
}

.quick-atom-row .field input[type="number"] {
  padding: 3px 8px;
}

.quick-atom-remove {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 5px;
}

.quick-atom-remove .material-symbols-outlined {
  font-size: 18px;
}

.quick-atom-empty {
  padding: 14px;
  border: 1px dashed var(--line-strong);
  border-radius: 6px;
  color: var(--muted);
  background: white;
}

/* Download modal */
.download-body {
  display: grid;
  gap: 12px;
  width: min(420px, calc(100vw - 80px));
}

.download-filename-field {
  gap: 4px;
}

.download-filename-inline {
  display: flex;
  align-items: center;
  gap: 6px;
}

.download-filename-inline input {
  flex: 1 1 auto;
}

.download-section {
  display: grid;
  gap: 6px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-soft);
}

.download-section-title {
  font-size: 0.9rem;
  font-weight: 600;
}

.download-section-title span {
  margin-left: 6px;
  color: var(--muted);
  font-weight: 400;
  font-size: 0.8rem;
}

.download-grid {
  display: grid;
  grid-template-columns: minmax(72px, 1fr) repeat(3, minmax(56px, auto));
  gap: 2px 4px;
  align-items: center;
}

.download-grid-head {
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
  padding-bottom: 2px;
}

.download-grid-rowlabel {
  font-size: 0.86rem;
  font-weight: 600;
}

.download-grid-cell {
  display: grid;
  place-items: center;
  padding: 3px 0;
}

.download-grid-cell input {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.download-grid-cell input:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

.download-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
}

.download-footer #download-zip {
  margin-left: auto;
}

.quick-serialized-values {
  display: grid;
  gap: 8px;
}

.periodic-table {
  display: grid;
  grid-template-columns: repeat(18, 32px);
  grid-auto-rows: 32px;
  gap: 3px;
  align-items: stretch;
  overflow: visible;
}

.periodic-cell {
  position: relative;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  min-height: 32px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: #f8fafb;
  color: #263542;
  transition: background 120ms ease, color 120ms ease, transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}

.periodic-cell::after {
  content: attr(data-atomic-number);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 4px);
  z-index: 3;
  min-width: 22px;
  padding: 3px 5px;
  border-radius: 4px;
  background: #17202a;
  color: white;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(2px);
  transition: opacity 120ms ease, transform 120ms ease;
}

.periodic-cell:hover::after,
.periodic-cell:focus-visible::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.periodic-cell:hover,
.periodic-cell:focus-visible {
  border-color: #102f3a;
  background: #102f3a;
  color: #ffffff;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.22),
    0 0 0 3px rgba(31, 111, 139, 0.22);
  transform: translateY(-1px);
  outline: none;
}

.periodic-cell-alkali { background: #f6d8d5; }
.periodic-cell-alkaline { background: #f1e0c8; }
.periodic-cell-transition { background: #dce7ef; }
.periodic-cell-post-transition { background: #e6e6db; }
.periodic-cell-metalloid { background: #dcebd4; }
.periodic-cell-nonmetal { background: #d8ece9; }
.periodic-cell-halogen { background: #dce7f4; }
.periodic-cell-noble { background: #e8e0f4; }
.periodic-cell-lanthanide { background: #efe2c8; }
.periodic-cell-actinide { background: #ead7cf; }

.periodic-cell-selected {
  border-color: var(--primary-strong);
  box-shadow:
    inset 0 0 0 2px var(--primary-strong),
    0 0 0 3px rgba(31, 111, 139, 0.16);
  transform: translateY(-1px);
}

.periodic-cell-selected:hover,
.periodic-cell-selected:focus-visible {
  border-color: #0b2530;
  background: #0b2530;
  color: #ffffff;
  box-shadow:
    inset 0 0 0 2px #ffffff,
    0 0 0 3px rgba(31, 111, 139, 0.30);
}

.periodic-cell-symbol {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
}

@media (max-width: 1100px) {
  .app-header {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

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

  .workspace,
  .plots {
    grid-template-columns: 1fr;
  }

  .plot-card:nth-child(3) {
    grid-column: auto;
  }

  .control-column {
    grid-template-rows: auto auto auto auto;
  }

  .quick-form-list {
    max-height: none;
  }
}

@media (max-width: 720px) {
  .app {
    padding: 10px;
  }

  .shell {
    min-height: calc(100vh - 20px);
  }

  .app-header,
  .control-column,
  .control-block,
  .quick-form-shell,
  .plot-card {
    border-radius: 6px;
  }

  .actions,
  .picker-row,
  .quick-form-main,
  .quick-detail-grid,
  .quick-composition-grid,
  .quick-atom-row {
    grid-template-columns: 1fr;
  }

  .actions,
  .picker-row {
    display: grid;
  }

  button {
    width: 100%;
  }

  .app-header .ghost-button {
    width: 100%;
  }

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

  .quick-modal {
    padding: 12px;
  }

  .quick-modal-panel {
    width: min(100vw - 24px, 100%);
    max-height: calc(100vh - 24px);
  }
}