/* style.css — 免震シミュレータ モダン学術ポータルデザイン */

/* === CSS Custom Properties === */
:root {
  --green-dark:   #2d6a4f;
  --green-mid:    #40916c;
  --green-accent: #52b788;
  --green-light:  #d8f3dc;
  --green-pale:   #f0faf3;
  --text-primary:   #1a2332;
  --text-secondary: #4a5568;
  --text-muted:     #8a9aac;
  --border:         #c8ddd5;
  --white:          #ffffff;
  --bg-page:        #f2f6f4;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --radius:    8px;
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Meiryo", "Yu Gothic", sans-serif;
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-page);
  line-height: 1.6;
}

ol { padding-left: 1.4em; }

a { color: var(--green-dark); text-decoration: none; }
a:hover { color: var(--green-accent); text-decoration: underline; }

.popup-link::after {
  content: " ↗";
  font-size: 0.8em;
  opacity: 0.6;
}

/* === Site Header === */
.site-header {
  background: var(--green-dark);
  color: var(--white);
}

.site-header__inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.site-header__lab {
  display: inline-block;
  background: var(--green-accent);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 9px;
  border-radius: 4px;
  flex-shrink: 0;
}

.site-header__super {
  display: block;
  font-size: 11px;
  opacity: 0.72;
  line-height: 1.3;
}

.site-header__name {
  display: block;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

/* ヘッダー右端のボタン群（使い方） */
.site-header__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}
.site-header__doc-link {
  font-family: inherit;
  cursor: pointer;
  color: var(--white);
  background: rgba(255,255,255,0.13);
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 5px;
  padding: 4px 13px;
  font-size: 12px;
  white-space: nowrap;
  transition: background 0.15s;
}
.site-header__doc-link:hover {
  background: rgba(255,255,255,0.26);
  color: var(--white);
  text-decoration: none;
}

.template-select {
  font-size: 13px;
  padding: 5px 10px;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--text-secondary);
  border-radius: 5px;
  cursor: pointer;
  max-width: 220px;
}
.template-select option {
  color: var(--text-primary);
  background: var(--white);
}

.site-nav__sample {
  margin-left: auto;
  display: flex;
  align-items: center;
  padding: 4px 0;
}

/* === Site Nav === */
.site-nav {
  background: var(--white);
  border-bottom: 1px solid var(--border);
}

.site-nav__inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__link {
  display: inline-block;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.site-nav__link:hover {
  color: var(--green-dark);
  text-decoration: none;
}
.site-nav__link--active {
  color: var(--green-dark);
  border-bottom-color: var(--green-accent);
  font-weight: 700;
}

/* === Main === */
.main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 28px 24px 16px;
}

/* === Stepper === */
.stepper {
  display: flex;
  align-items: flex-start;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  padding: 18px 24px;
  margin-bottom: 16px;
}

.stepper__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: color 0.2s;
}

.stepper__dot {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #d0dbd8;
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s, transform 0.15s;
}

.stepper__step.active .stepper__dot {
  background: var(--green-dark);
  transform: scale(1.12);
}
.stepper__step.done .stepper__dot {
  background: var(--green-accent);
}

.stepper__step.active { color: var(--green-dark); }
.stepper__step.active .stepper__label { font-weight: 700; }
.stepper__step.done   { color: var(--green-accent); }

.stepper__label {
  font-size: 11px;
  white-space: nowrap;
  text-align: center;
}

.stepper__line {
  flex: 1;
  height: 2px;
  background: #d0dbd8;
  margin: 15px 8px 0; /* 15px = 30px dot / 2 */
  border-radius: 1px;
  transition: background 0.25s;
}

/* === Message bar === */
.message-bar {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--green-pale);
  border: 1px solid var(--green-light);
  border-left: 3px solid var(--green-accent);
  border-radius: 5px;
  padding: 11px 16px;
  margin-bottom: 20px;
  font-size: 13px;
  min-height: 44px;
}

.message-bar__icon {
  color: var(--green-accent);
  font-size: 15px;
  flex-shrink: 0;
  margin-top: 1px;
}

.message-bar__text {
  color: var(--text-secondary);
  line-height: 1.5;
}

/* === Cards === */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  overflow: hidden;
}

.card__header {
  background: var(--green-dark);
  color: var(--white);
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.card__body {
  padding: 18px 20px;
}

/* === Input Grid (2 columns) === */
.input-grid {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 16px;
  align-items: start;
}

.right-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* === Input Sections === */
.input-section {
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--green-light);
}
.input-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.input-section__title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  line-height: 1.4;
}

/* === Badges === */
.badge {
  font-size: 10px;
  font-weight: 400;
  padding: 2px 7px;
  border-radius: 3px;
  white-space: nowrap;
}
.badge--required {
  background: #fff8e1;
  color: #7d5a00;
  border: 1px solid #ffe082;
}

/* === Input rows === */
.input-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.input-row--right {
  justify-content: flex-end;
  margin-top: 10px;
}

/* === Mass table === */
.mass-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-bottom: 4px;
}
.mass-table thead tr {
  background: var(--green-pale);
}
.mass-table th {
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.mass-table td {
  padding: 5px 8px;
  text-align: center;
  border-bottom: 1px solid var(--green-light);
  font-size: 13px;
  font-weight: 400;
  background: var(--white);
}
.mass-table tbody tr:last-child td { border-bottom: none; }
.mass-table__empty {
  color: var(--text-muted);
  font-style: italic;
  padding: 12px;
}

.sum-weight {
  font-size: 12px;
  color: var(--text-secondary);
}
.sum-weight strong {
  color: var(--green-dark);
}

/* === Property grid === */
.prop-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 12px;
  align-items: center;
  margin-bottom: 14px;
}

.prop-label {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.note {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 400;
}

.qd-preview {
  text-align: center;
  margin: 8px 0 12px;
}
.qd-img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 4px;
}

/* === Form fields === */
.field {
  font-family: inherit;
  font-size: 13px;
  padding: 6px 9px;
  border: 1px solid #b8cec7;
  border-radius: 4px;
  color: var(--text-primary);
  background: var(--white);
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
}
.field:focus {
  outline: none;
  border-color: var(--green-accent);
  box-shadow: 0 0 0 3px rgba(82,183,136,0.18);
}
.field:disabled {
  background: #f4f7f5;
  color: var(--text-muted);
  border-color: #d4e0db;
  cursor: not-allowed;
}

/* === Buttons === */
.btn {
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  padding: 7px 18px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s, transform 0.1s;
  white-space: nowrap;
  line-height: 1.4;
}
.btn:active:not(:disabled) { transform: translateY(1px); }

.btn--primary {
  background: var(--green-dark);
  color: var(--white);
}
.btn--primary:hover:not(:disabled) { background: var(--green-mid); }
.btn--primary:disabled {
  background: #b0c0bc;
  cursor: not-allowed;
}

.btn--run {
  background: var(--green-dark);
  color: var(--white);
  font-size: 15px;
  padding: 11px 32px;
  letter-spacing: 0.06em;
  border-radius: 6px;
}
.btn--run:hover:not(:disabled) { background: var(--green-mid); }
.btn--run:disabled {
  background: #b0c0bc;
  cursor: not-allowed;
}

.btn--ghost {
  background: transparent;
  color: var(--green-dark);
  border: 1px solid var(--border);
}
.btn--ghost:hover:not(:disabled) { background: var(--green-pale); }
.btn--ghost:disabled {
  color: var(--text-muted);
  border-color: #dde6e3;
  cursor: not-allowed;
}

/* === Listbox / select === */
.select-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.select-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.listbox {
  font-family: inherit;
  font-size: 12px;
  width: 100%;
  border: 1px solid #b8cec7;
  border-radius: 4px;
  padding: 2px;
  color: var(--text-primary);
}
.listbox:focus {
  outline: none;
  border-color: var(--green-accent);
}

.not-ready {
  color: var(--text-muted);
  font-size: 13px;
  text-align: center;
  padding: 24px 16px;
  font-style: italic;
}

.run-buttons {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: center;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--green-light);
}

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-bottom: 18px;
}
.result-table th {
  background: var(--green-pale);
  padding: 8px 14px;
  font-size: 12px;
  color: var(--text-secondary);
  text-align: left;
  border: 1px solid var(--border);
  width: 150px;
  font-weight: 700;
}
.result-table td {
  padding: 8px 14px;
  border: 1px solid var(--border);
  font-weight: 700;
  font-size: 15px;
  color: var(--green-dark);
}

.canvas-wrap {
  text-align: center;
  margin-bottom: 14px;
  background: var(--bg-page);
  border-radius: 4px;
  padding: 8px;
}
#sim-canvas {
  border: 1px solid var(--border);
  border-radius: 4px;
  max-width: 100%;
  display: inline-block;
}

.anim-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 20px;
}

/* === Custom wave input area === */
.custom-wave-area {
  margin-top: 12px;
  padding: 10px 12px;
  background: var(--green-pale);
  border: 1px solid var(--green-light);
  border-radius: 5px;
}

.custom-wave-row {
  display: flex;
  flex-direction: column;
  margin-bottom: 8px;
}
.custom-wave-row:last-of-type { margin-bottom: 0; }

.custom-radio-group {
  display: flex;
  gap: 14px;
  margin-top: 4px;
  flex-wrap: wrap;
}
.custom-radio-group--small {
  gap: 10px;
  margin-bottom: 4px;
}
.custom-radio {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
}
.custom-radio input[type="radio"] {
  cursor: pointer;
  accent-color: var(--green-dark);
}

.custom-wave-note {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 8px;
  margin-bottom: 0;
}

/* === Recalc bar === */
.recalc-bar {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--green-light);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.recalc-bar__selects {
  display: flex;
  gap: 12px;
  flex: 1;
  flex-wrap: wrap;
}

.recalc-bar__field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 160px;
  flex: 1;
}

.recalc-bar__label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
}

.recalc-select {
  font-family: inherit;
  font-size: 13px;
  padding: 6px 9px;
  border: 1px solid #b8cec7;
  border-radius: 4px;
  color: var(--text-primary);
  background: var(--white);
  cursor: pointer;
  width: 100%;
}
.recalc-select:focus {
  outline: none;
  border-color: var(--green-accent);
  box-shadow: 0 0 0 3px rgba(82,183,136,0.18);
}

/* === Wave info section (独立) === */
.wave-info-section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px 16px;
}

/* === Wave info (details/summary) === */
.wave-info {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-top: 4px;
}

.wave-info__title {
  background: var(--green-pale);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  color: var(--text-secondary);
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}
.wave-info__title::-webkit-details-marker { display: none; }
.wave-info__title::before {
  content: "▶";
  font-size: 10px;
  color: var(--green-accent);
  transition: transform 0.15s;
  display: inline-block;
}
details[open] .wave-info__title::before { transform: rotate(90deg); }

.wave-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.wave-table th {
  background: var(--green-pale);
  padding: 7px 12px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.wave-table td {
  padding: 6px 12px;
  border-bottom: 1px solid var(--green-light);
  text-align: center;
  font-weight: 400;
  font-size: 12px;
  color: var(--text-primary);
}
.wave-table td:nth-child(2) { text-align: left; }
.wave-table tbody tr:last-child td { border-bottom: none; }
.wave-table tbody tr:hover td { background: var(--green-pale); }

/* === Notes section === */
.notes-section {
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 28px 24px;
}

.notes-grid {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.notes-block__title {
  font-size: 13px;
  font-weight: 700;
  color: var(--green-dark);
  border-bottom: 1px solid var(--green-light);
  padding-bottom: 5px;
  margin-bottom: 10px;
  margin-top: 20px;
}
.notes-block__title:first-child { margin-top: 0; }

.notes-block ol,
.notes-block__text {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.9;
}
.notes-block a { color: var(--green-dark); }
.notes-block a:hover { color: var(--green-accent); }

/* === Site Footer === */
.site-footer {
  background: var(--green-dark);
  color: rgba(255,255,255,0.65);
  text-align: center;
  padding: 20px 24px;
  font-size: 12px;
}

.site-footer__inner {
  margin-bottom: 6px;
}

.site-footer a {
  color: rgba(255,255,255,0.88);
}
.site-footer a:hover {
  color: var(--white);
  text-decoration: underline;
}

.site-footer__sep {
  margin: 0 10px;
  opacity: 0.35;
}

.site-footer__copy {
  font-size: 11px;
  opacity: 0.45;
}

/* === 使い方モーダル === */
#helpModal {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 16px;
}
#helpModal.open { display: flex; }

#helpModalBox {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  width: 100%;
  max-width: 560px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#helpModalHead {
  background: var(--green-dark);
  color: var(--white);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
#helpModalClose {
  font-size: 16px;
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
  color: rgba(255,255,255,0.75);
  padding: 2px;
}
#helpModalClose:hover { color: var(--white); }

#helpModalBody {
  padding: 16px 20px 12px;
  overflow-y: auto;
}

#helpModalFoot {
  padding: 10px 20px 18px;
  text-align: center;
  flex-shrink: 0;
}

.help-heading {
  font-size: 13px;
  font-weight: 700;
  color: var(--green-dark);
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
  margin-bottom: 8px;
}
.help-heading + .help-heading,
.help-steps + .help-heading,
.help-text + .help-heading {
  margin-top: 16px;
}
.help-steps {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin: 0;
}
.help-steps ul {
  font-size: 11.5px;
  line-height: 1.7;
  padding-left: 1.4em;
}
ul.help-steps { padding-left: 1.4em; }
.help-text {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* === Responsive === */
@media (max-width: 680px) {
  .site-header__inner { padding: 12px 16px; }
  .site-header__name  { font-size: 16px; }
  .template-select    { max-width: 140px; font-size: 12px; }
  .site-nav__link     { padding: 9px 10px; font-size: 12px; }
  .main               { padding: 18px 16px 12px; }
  .input-grid         { grid-template-columns: 1fr; }
  .notes-grid         { grid-template-columns: 1fr; gap: 0; }
  .stepper__label     { font-size: 10px; }
  .result-section     { padding: 0 16px 20px; }
  .notes-section      { padding: 20px 16px; }
}