:root {
  --green-dark: #0a3d0a;
  --green-primary: #1b7a1b;
  --green-mid: #2d9e2d;
  --green-light: #4caf50;
  --green-pale: #e8f5e9;
  --green-accent: #00e676;
  --bg-card: #ffffff;
  --text-dark: #1a1a1a;
  --text-mid: #4a4a4a;
  --text-light: #888;
  --border: #c8e6c9;
  --red-penalty: #e53935;
  --red-light: #ffebee;
  --yellow-perf: #fdd835;
  --yellow-light: #fffde7;
  --orange-safety: #ff6d00;
  --orange-light: #fff3e0;
  --blue-info: #1976d2;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
  --radius: 12px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", sans-serif;
  background: linear-gradient(135deg, #f0f7f0 0%, #e8f5e9 50%, #f1f8e9 100%);
  color: var(--text-dark);
  min-height: 100vh;
}

button,
input,
select {
  font: inherit;
}

canvas {
  display: block;
  max-width: 100%;
}

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

.page-shell {
  min-height: 100vh;
}

.hero {
  background: linear-gradient(135deg, var(--green-dark) 0%, var(--green-primary) 60%, var(--green-mid) 100%);
  color: white;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero__backdrop {
  display: none;
}

.hero__content,
.scoreboard,
.workspace {
  max-width: 1400px;
  margin: 0 auto;
}

.hero__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 24px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-lockup__logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  background: rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  padding: 5px;
}

.eyebrow {
  font-size: 11px;
  opacity: 0.8;
  letter-spacing: 2px;
  text-transform: uppercase;
}

h1 {
  font-family: "Racing Sans One", cursive;
  font-size: 22px;
  letter-spacing: 1px;
}

.hero__subtitle {
  margin-top: 4px;
  font-size: 12px;
  opacity: 0.88;
}

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

.meta-chip {
  padding: 10px 14px;
  background: rgba(0, 0, 0, 0.18);
  border-radius: 10px;
  min-width: 120px;
}

.meta-chip__label {
  display: block;
  font-size: 10px;
  opacity: 0.75;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.meta-chip strong,
.meta-chip a {
  color: white;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.scoreboard {
  background: rgba(0, 0, 0, 0.25);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.scoreboard__item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.scoreboard__label {
  opacity: 0.8;
  font-weight: 400;
}

.scoreboard__value {
  font-weight: 700;
  font-size: 20px;
  font-family: "Racing Sans One", cursive;
  color: var(--green-accent);
}

.scoreboard__value small {
  font-family: "Inter", sans-serif;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}

.scoreboard__value--danger {
  color: #ff5252;
}

#r-delta.is-faster {
  color: var(--green-accent);
}

#r-delta.is-slower {
  color: #ff5252;
}

.scoreboard__progress {
  flex: 1;
  max-width: 320px;
  min-width: 180px;
}

.scoreboard__progress-labels {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.8);
}

.progress-bar-container {
  width: 100%;
  height: 12px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green-accent), #69f0ae);
  border-radius: 6px;
  transition: width 0.5s ease;
}

.fill-amber {
  background: linear-gradient(90deg, #ffca28, #ffd54f);
}

.workspace {
  padding: 16px 16px 80px;
}

.control-panel {
  margin-bottom: 16px;
  display: flex;
  gap: 12px;
  align-items: end;
  justify-content: space-between;
  flex-wrap: wrap;
}

.control-panel__main {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field__label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-mid);
}

.field input {
  padding: 10px 16px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: white;
  transition: border-color 0.2s;
}

.field input:focus,
.data-input-group input:focus,
.data-input-group select:focus {
  outline: none;
  border-color: var(--green-primary);
}

.control-panel__actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn--primary {
  background: var(--green-primary);
  color: white;
}

.btn--primary:hover {
  background: var(--green-dark);
}

.btn--ghost {
  background: white;
  color: var(--text-mid);
  border: 2px solid var(--border);
}

.btn--danger {
  background: var(--red-penalty);
  color: white;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.nav-tabs {
  margin: 0 auto 16px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
}

.nav-tabs::-webkit-scrollbar {
  display: none;
}

.nav-tab {
  padding: 8px 16px;
  background: white;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.2s;
  color: var(--text-mid);
}

.nav-tab:hover,
.nav-tab.active {
  border-color: var(--green-primary);
  color: white;
  background: var(--green-primary);
}

.main-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.content-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.article-section,
.sidebar-card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.article-header {
  background: linear-gradient(135deg, var(--green-primary), var(--green-mid));
  color: white;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.article-header h2 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.rule-meta-line {
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-penalty-sum {
  background: rgba(255, 255, 255, 0.2);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
}

.toggle-icon {
  font-size: 20px;
}

.article-body {
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-body.hidden {
  display: none;
}

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

.rule-card {
  border: 2px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: all 0.2s;
  background: white;
}

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

.rule-top {
  display: flex;
  align-items: stretch;
}

.rule-badge-col {
  width: 6px;
  flex-shrink: 0;
}

.rule-badge-col.generale {
  background: var(--blue-info);
}

.rule-badge-col.sicurezza {
  background: var(--orange-safety);
}

.rule-badge-col.performance {
  background: var(--yellow-perf);
}

.rule-content {
  flex: 1;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rule-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.rule-id {
  font-weight: 800;
  font-size: 15px;
  color: var(--green-dark);
}

.rule-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tag.generale {
  background: #e3f2fd;
  color: #1565c0;
}

.tag.performance {
  background: var(--yellow-light);
  color: #f57f17;
}

.rule-description {
  font-size: 13px;
  color: var(--text-mid);
  line-height: 1.5;
}

.forces-data {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.force-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-card__header {
  background: var(--green-dark);
  color: white;
  padding: 12px 16px;
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.sidebar-card__body {
  padding: 16px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 8px 0;
  border-bottom: 1px solid #f0f0f0;
  font-size: 12px;
  gap: 12px;
}

.summary-row:last-child {
  border-bottom: none;
}

.summary-row--total {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 2px solid var(--border);
}

.sr-label {
  color: var(--text-mid);
  flex: 1;
  line-height: 1.4;
}

.sr-value {
  font-weight: 700;
  white-space: nowrap;
  font-family: "Racing Sans One", cursive;
  text-align: right;
}

.sr-value.penalty {
  color: var(--red-penalty);
}

.legend-list,
.quick-wins,
.config-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-note,
.quick-wins p,
.quick-wins li {
  font-size: 11px;
  color: var(--text-light);
  line-height: 1.5;
}

.quick-wins ul {
  padding-left: 18px;
}

.config-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid #eef2ee;
}

.config-group:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.config-group__title {
  font-size: 12px;
  font-weight: 700;
  color: var(--green-dark);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.data-input-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.data-input-group {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.data-input-group.vertical {
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.data-input-group label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-mid);
}

.data-input-group input,
.data-input-group select {
  width: 100%;
  padding: 9px 10px;
  border: 2px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  background: white;
}

.data-input-group input[type="color"] {
  height: 42px;
  padding: 4px;
}

.data-input-group .unit {
  font-size: 11px;
  color: var(--text-light);
}

.empty-state {
  padding: 32px 16px;
  border: 2px dashed var(--border);
  border-radius: 10px;
  text-align: center;
  color: var(--text-light);
  background: #fafdfb;
}

#validation-banner {
  display: none;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--red-light);
  color: var(--red-penalty);
  font-size: 12px;
  line-height: 1.5;
}

#validation-banner.visible {
  display: block;
}

.saved-run {
  border: 2px solid var(--border);
  border-radius: 10px;
  background: white;
  padding: 10px 12px;
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr) auto auto;
  gap: 10px;
  align-items: center;
}

.run-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
}

.run-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dark);
}

.saved-run-meta {
  font-size: 11px;
  color: var(--text-light);
}

.run-time {
  font-family: "Racing Sans One", cursive;
  color: var(--green-dark);
}

.run-delta {
  font-size: 11px;
  font-weight: 700;
}

.run-delta.faster {
  color: var(--green-primary);
}

.run-delta.slower {
  color: var(--red-penalty);
}

.run-remove {
  padding: 0;
  border: none;
  background: transparent;
  font-size: 15px;
  color: var(--text-light);
  cursor: pointer;
}

.run-remove:hover {
  color: var(--red-penalty);
}

.gs-sponsor-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
  background: #fdfdfd;
}

.gs-sponsor-card {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 344px;
  height: 270px;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.3s ease;
  overflow: hidden;
  margin: 0 auto;
}

.gs-sponsor-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--green-primary);
}

.gs-sponsor-card img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}

.invalid {
  border-color: var(--red-penalty) !important;
}

@media (min-width: 1200px) {
  .main-grid {
    grid-template-columns: 1fr 380px;
  }
}

@media (max-width: 768px) {
  .hero {
    position: relative;
  }

  .hero__content {
    padding: 8px 12px;
    flex-direction: column;
    align-items: flex-start;
  }

  h1 {
    font-size: 18px;
  }

  .hero__meta {
    width: 100%;
    justify-content: flex-start;
  }

  .scoreboard {
    padding: 8px 12px;
    gap: 12px;
  }

  .scoreboard__value {
    font-size: 16px;
  }

  .workspace {
    padding: 16px 8px 60px;
  }

  .control-panel__main,
  .dual-body,
  .data-input-grid {
    grid-template-columns: 1fr;
  }

  .saved-run,
  .rule-header-row {
    grid-template-columns: 1fr;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }
}