:root {
  --bg: #f2f6ff;
  --panel: #ffffff;
  --primary: #3563e9;
  --accent: #ffb703;
  --text: #1f2a44;
  --muted: #5f6c8d;
  --border: #dfe6ff;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Nunito', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  max-width: 1100px;
  margin-inline: auto;
}

a {
  color: var(--primary);
  text-decoration: none;
}

header,
main,
footer {
  padding-inline: min(24vw, 7rem);
}

.hero {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  padding: 3rem 0 2rem;
  align-items: center;
  justify-content: center;
}

.hero__content {
  flex: 0 1 720px;
  text-align: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.cta {
  display: inline-block;
  margin-top: 1.5rem;
  background: var(--primary);
  color: #fff;
  padding: 0.9rem 1.6rem;
  border-radius: 999px;
  font-weight: 700;
}

.panel {
  background: var(--panel);
  border-radius: 1.5rem;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 25px 45px rgba(53, 99, 233, 0.08);
}

.panel__header h2 {
  margin-top: 0;
}

.module-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

#mimar-sinan {
  border: 3px solid #ffb703;
  box-shadow: 0 20px 35px rgba(255, 183, 3, 0.18);
}

.subpanel {
  margin-top: 1.5rem;
  padding: 1.25rem 1.5rem;
  border-radius: 1.25rem;
  border: 2px solid var(--border);
  background: #f9fbff;
}

.subpanel + .subpanel {
  margin-top: 1.25rem;
}

.subpanel .panel__header h2 {
  font-size: 1.15rem;
}

.module-card {
  border: 4px solid #9aa4d4;
  border-radius: 1.25rem;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.module-card h3 {
  margin: 0;
  color: var(--primary);
}

.module-card span.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: #eef2ff;
  font-size: 0.85rem;
  font-weight: 600;
}

.module-description {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.module-tasks-box {
  margin-top: 0.75rem;
  padding: 0.75rem 0.9rem;
  border-radius: 0.75rem;
  background: rgba(80, 108, 219, 0.05);
  border: 1px dashed rgba(80, 108, 219, 0.4);
}

.module-tasks-title {
  margin: 0 0 0.25rem;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.module-tasks {
  margin: 0;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
}

.module-body p {
  margin: 0.2rem 0;
  color: var(--muted);
}

.link-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
}

.link-group-title {
  margin: 0.5rem 0 0.25rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
}

.link-column {
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  padding: 0.75rem;
  background: #f9fbff;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-height: 130px;
}

.link-column__title {
  margin: 0;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.link-chip {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  font-size: 0.9rem;
  color: var(--primary);
  background: #f4f7ff;
}

.link-chip--disabled {
  cursor: default;
  opacity: 0.7;
}

.note-link {
  /* eval-link ile aynı buton yapısını kullanıyoruz; sadece ikon rengi için küçük vurgu */
  color: var(--primary);
}

.module-note {
  margin-top: 0.75rem;
  border: 1px dashed var(--border);
  border-radius: 1rem;
  padding: 0.9rem;
  background: #fff9f1;
}

.module-note__title {
  margin: 0 0 0.4rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
}

.eval-links {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.module-pre-eval {
  margin-top: 0.4rem;
  margin-bottom: 0.75rem;
  padding: 0.75rem 0.9rem;
  border-radius: 1rem;
  background: #fff9f1;
  border: 1px dashed var(--border);
}

.module-pre-eval__title {
  margin: 0 0 0.3rem;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.eval-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--primary);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  background: #f9fbff;
}

.module-eval {
  margin-top: 0.75rem;
  border: 1px dashed var(--border);
  border-radius: 1rem;
  padding: 0.9rem;
  background: #fff9f1;
}

.module-eval__title {
  margin: 0 0 0.4rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
}

.module-card.locked {
  opacity: 0.55;
  position: relative;
}

.lock-notice {
  margin-top: 1rem;
  background: #fff4f4;
  border: 1px solid #ffc9c9;
  border-radius: 1rem;
  padding: 1rem;
  font-weight: 600;
  color: #c9184a;
}

.passcode-form {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1rem;
  background: #f5f8ff;
}

.passcode-inputs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.passcode-form input {
  flex: 1 1 180px;
  padding: 0.6rem;
  border: 1px solid var(--border);
  border-radius: 0.6rem;
}

.passcode-form button {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 0.6rem;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.passcode-feedback {
  margin-top: 0.5rem;
  font-weight: 600;
}

.passcode-feedback.success {
  color: #26c485;
}

.passcode-feedback.error {
  color: #ef476f;
}

.sim-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.sim-controls label {
  display: block;
  margin-bottom: 1.25rem;
  font-weight: 600;
  color: var(--muted);
}

.sim-controls input[type='range'],
.sim-controls select {
  width: 100%;
  margin-top: 0.5rem;
}

.sim-controls button {
  background: var(--border);
  border: none;
  width: 100%;
  padding: 0.75rem;
  border-radius: 0.75rem;
  cursor: pointer;
  font-weight: 700;
}

.sim-output {
  background: #f9fbff;
  border-radius: 1rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  text-align: center;
}

.status-value {
  font-size: 3rem;
  margin: 0.25rem 0;
  color: var(--primary);
}

.status-callout {
  font-weight: 700;
}

.bridge-visual {
  height: 140px;
  border-radius: 1rem;
  border: 4px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 1rem 0;
  position: relative;
  transition: border-color 0.3s, background 0.3s;
}

.bridge-visual::after,
.bridge-visual::before {
  content: '';
  position: absolute;
  bottom: 12px;
  width: 40%;
  height: 4px;
  background: var(--primary);
  border-radius: 2px;
}

.bridge-visual::before {
  left: 10%;
}

.bridge-visual::after {
  right: 10%;
}

.budget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.performance-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.4fr);
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.performance-table {
  border: 1px solid var(--border);
  border-radius: 1rem;
  overflow: hidden;
  background: #f9fbff;
}

.performance-row {
  display: grid;
  grid-template-columns: 1.4fr 1.5fr 1fr;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
}

.performance-row--head {
  background: #eef2ff;
  font-weight: 700;
  border-top: none;
}

.performance-row--head span {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  color: var(--muted);
}

.performance-hint {
  margin: 0.2rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.performance-input {
  width: 100%;
  padding: 0.45rem 0.6rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  font-family: inherit;
}

.performance-input--readonly {
  background: #eef2ff;
}

.performance-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.performance-label .performance-input {
  margin-top: 0.25rem;
}

.performance-result {
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.25rem 1.5rem;
  background: #fff9f1;
}

.performance-question {
  margin-top: 0;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.performance-option {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.performance-option input {
  margin-top: 0.2rem;
}

@media (max-width: 768px) {
  .performance-grid {
    grid-template-columns: 1fr;
  }

  .performance-row {
    grid-template-columns: 1fr;
  }
}

.budget-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1rem;
  gap: 0.5rem;
  cursor: pointer;
}

.budget-card input {
  margin-bottom: 0.5rem;
}

.budget-output {
  background: #f9fbff;
  border-radius: 1rem;
  padding: 1.5rem;
}

#budgetChoices {
  list-style: disc;
  padding-left: 1.5rem;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.resource-grid ul {
  padding-left: 1.2rem;
}

footer {
  text-align: center;
  color: var(--muted);
  padding-bottom: 2rem;
}

@media (max-width: 640px) {
  header,
  main,
  footer {
    padding-inline: 1.25rem;
  }
}