:root {
  --red: #e03127;
  --blue: #2878ac;
  --pink: #ec61a0;
  --yellow: #f2d25c;
  --green: #00694e;
  --ink: #111827;
  --muted: #4b5563;
  --line: #d6dbe3;
  --soft: #f6f8fb;
  --paper: #ffffff;
  --focus: #0f62fe;
  --shadow: 0 16px 40px rgba(17, 24, 39, 0.12);
  --radius: 8px;
  --header-height: 74px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--soft);
  color: var(--ink);
  font-family: Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

body.high-contrast {
  --ink: #000000;
  --muted: #111111;
  --line: #000000;
  --soft: #ffffff;
  --paper: #ffffff;
  --focus: #ffbf00;
  --shadow: 0 0 0 2px #000000;
  background: #ffffff;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: #005c99;
  text-decoration-thickness: 2px;
}

a:hover {
  text-decoration: none;
}

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

button,
.button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.56rem 0.85rem;
  text-decoration: none;
  font-weight: 700;
}

button:hover,
.button:hover {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(40, 120, 172, 0.12);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.button-primary,
button.primary {
  background: var(--red);
  border-color: var(--red);
  color: #ffffff;
}

.button-secondary,
button.secondary {
  background: #e9f4fb;
  border-color: #9bc7df;
}

.icon-button {
  width: 42px;
  padding: 0;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 1000;
  background: var(--ink);
  color: var(--paper);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(1180px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header,
.app-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.site-header-inner,
.app-header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 0;
}

.brand img {
  display: block;
  max-height: 48px;
  width: auto;
}

.brand .brand-text {
  font-weight: 700;
  font-size: 1.15rem;
}

.header-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
}

.hero {
  background:
    linear-gradient(90deg, rgba(224, 49, 39, 0.92), rgba(0, 105, 78, 0.9)),
    url("../assets/cards/card_001_front.png") center / cover;
  color: #ffffff;
  min-height: 520px;
  display: flex;
  align-items: center;
  position: relative;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 7px;
  background: linear-gradient(90deg, var(--red), var(--blue), var(--pink), var(--yellow), var(--green));
}

.hero-content {
  width: min(780px, 100%);
  padding: 5rem 0 6rem;
  position: relative;
  z-index: 1;
}

.kicker {
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0;
  font-weight: 700;
}

.hero h1 {
  font-size: clamp(3.2rem, 8vw, 6.4rem);
  line-height: 0.98;
  margin: 0 0 1rem;
}

.hero p {
  max-width: 680px;
  font-size: 1.25rem;
  margin: 0 0 1.6rem;
}

.hero .button-primary {
  background: #ffffff;
  border-color: #ffffff;
  color: #111827;
}

.section {
  padding: 3.8rem 0;
}

.section:nth-of-type(even) {
  background: var(--paper);
}

.section h2,
.panel-title {
  margin: 0 0 1rem;
  line-height: 1.18;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
}

.learning-type-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.learning-type-item,
.info-item,
.analytics-card,
.warning-list,
.storage-note {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
}

.learning-type-item {
  border-left: 12px solid var(--type-color, var(--blue));
}

.how-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.how-list li {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  counter-increment: steps;
}

.how-list li::before {
  content: counter(steps) ".";
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--red);
}

.site-footer {
  background: #111827;
  color: #ffffff;
  padding: 2rem 0;
}

.site-footer a {
  color: #ffffff;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 0.75rem;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto auto 1fr;
}

.app-nav {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.tabs {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.75rem 0;
}

.tab-button[aria-selected="true"] {
  background: #e9f4fb;
  border-color: var(--blue);
}

.app-main {
  padding: 1.4rem 0 3rem;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.field {
  display: grid;
  gap: 0.32rem;
}

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

label,
.field-label {
  font-weight: 700;
  color: var(--ink);
}

input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  min-height: 42px;
  padding: 0.55rem 0.65rem;
}

textarea {
  resize: vertical;
  min-height: 88px;
}

.workspace-toolbar,
.browser-toolbar,
.export-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.workspace-scroll {
  overflow-x: auto;
  padding-bottom: 0.75rem;
}

.plan-board {
  min-width: 920px;
  display: grid;
  gap: 1rem;
}

.plan-row {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fbfcfe;
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 190px;
}

.row-meta {
  border-right: 1px solid var(--line);
  padding: 0.75rem;
  display: grid;
  gap: 0.55rem;
  align-content: start;
}

.row-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.row-slots {
  padding: 0.75rem;
  display: grid;
  grid-template-columns: repeat(var(--slot-count, 4), minmax(180px, 1fr));
  gap: 0.75rem;
}

.slot {
  min-height: 168px;
  border: 2px dashed #bac4d1;
  border-radius: var(--radius);
  background: var(--paper);
  padding: 0.5rem;
  display: flex;
}

.slot.is-over {
  border-color: var(--blue);
  background: #e9f4fb;
}

.empty-slot {
  color: var(--muted);
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 100%;
  text-align: center;
}

.plan-card {
  width: 100%;
  border: 1px solid var(--line);
  border-left: 10px solid var(--type-color, var(--blue));
  border-radius: var(--radius);
  background: var(--paper);
  padding: 0.75rem;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 0.5rem;
  box-shadow: 0 6px 18px rgba(17, 24, 39, 0.08);
}

.plan-card[draggable="true"] {
  cursor: grab;
}

.plan-card:active {
  cursor: grabbing;
}

.plan-card h4,
.activity-card h3 {
  margin: 0;
  line-height: 1.2;
}

.plan-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #f7f9fc;
  color: var(--ink);
  padding: 0.16rem 0.48rem;
  font-size: 0.84rem;
  font-weight: 700;
}

.type-tag {
  background: var(--type-color, #e9f4fb);
  color: #111827;
  border-color: rgba(17, 24, 39, 0.25);
}

.browser-layout {
  display: grid;
  grid-template-columns: 285px 1fr;
  gap: 1rem;
  align-items: start;
}

.filters-panel {
  position: sticky;
  top: 1rem;
}

.filters-panel:not(.open) .filters-body {
  display: none;
}

.filter-groups {
  display: grid;
  gap: 0.7rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.activity-card {
  min-height: 320px;
  border: 1px solid var(--line);
  border-top: 9px solid var(--type-color, var(--blue));
  border-radius: var(--radius);
  background: var(--paper);
  padding: 0.9rem;
  display: grid;
  grid-template-rows: auto minmax(112px, 1fr) auto auto;
  gap: 0.7rem;
  cursor: pointer;
}

.activity-card:hover {
  box-shadow: var(--shadow);
}

.card-description {
  max-height: 7.4rem;
  overflow: auto;
  color: var(--muted);
  padding-right: 0.25rem;
}

.sdg-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
}

.sdg-icon {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  border: 1px solid rgba(17, 24, 39, 0.18);
  object-fit: cover;
  background: #ffffff;
}

.sdg-fallback {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  min-height: 30px;
  border-radius: 4px;
  border: 1px solid var(--line);
  font-size: 0.75rem;
  font-weight: 700;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.62);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal-backdrop.active {
  display: flex;
}

.modal {
  width: min(980px, 100%);
  max-height: min(88vh, 980px);
  overflow: auto;
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.modal-header {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.modal-title {
  margin: 0;
}

.modal-body {
  padding: 1rem;
}

.modal-footer {
  border-top: 1px solid var(--line);
  padding: 1rem;
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 1rem;
}

.detail-section {
  margin-bottom: 1rem;
}

.detail-section h3 {
  margin: 0 0 0.45rem;
}

.detail-section ul,
.detail-section ol {
  margin-top: 0.35rem;
}

.visual-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin-top: 0.8rem;
}

.visual-card-grid figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.5rem;
}

.list-editor {
  display: grid;
  gap: 0.5rem;
}

.list-editor-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.5rem;
  align-items: center;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.45rem;
}

.checkbox-pill {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.45rem;
  display: flex;
  gap: 0.35rem;
  align-items: center;
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.analytics-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.bar-list {
  display: grid;
  gap: 0.4rem;
}

.bar-row {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) minmax(80px, 2fr) auto;
  gap: 0.5rem;
  align-items: center;
}

.bar {
  height: 12px;
  background: #e5e7eb;
  border-radius: 999px;
  overflow: hidden;
}

.bar span {
  display: block;
  height: 100%;
  width: var(--bar-width, 0%);
  background: var(--blue);
}

.warning-list ul,
.analytics-card ul {
  margin: 0;
  padding-left: 1.2rem;
}

.status-message {
  min-height: 1.5rem;
  color: var(--green);
  font-weight: 700;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden {
  display: none !important;
}

@media (max-width: 1100px) {
  .cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .analytics-grid,
  .learning-type-grid,
  .how-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .site-header-inner,
  .app-header-inner,
  .two-column,
  .browser-layout,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .site-header-inner,
  .app-header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.8rem 0;
  }

  .hero {
    min-height: 460px;
  }

  .form-grid,
  .analytics-grid,
  .learning-type-grid,
  .how-list,
  .cards-grid,
  .visual-card-grid {
    grid-template-columns: 1fr;
  }

  .filters-panel {
    position: static;
  }

  .filters-body {
    display: none;
  }

  .filters-panel.open .filters-body {
    display: block;
  }

  .checkbox-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 1rem, 1180px);
  }

  .hero h1 {
    font-size: 3rem;
  }

  .hero p {
    font-size: 1.05rem;
  }

  .header-actions,
  .workspace-toolbar,
  .browser-toolbar,
  .export-toolbar,
  .modal-footer {
    width: 100%;
    justify-content: stretch;
  }

  .header-actions button,
  .workspace-toolbar button,
  .browser-toolbar button,
  .export-toolbar button,
  .modal-footer button,
  .button {
    flex: 1 1 auto;
  }

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