/* DBA Foundation Course Styles */

:root {
  --dba-core-canvas: #fdfbf7;
  --dba-core-ink: #1c2128;
  --dba-core-accent: #b91c1c;
  --dba-core-surface: #ffffff;
  --dba-core-edge: #e5e7eb;
  --dba-core-faded: #64748b;
  --dba-core-focus: rgba(185, 28, 28, 0.1);
  --dba-core-spacing-sm: 0.75rem;
  --dba-core-spacing-md: 1.5rem;
  --dba-core-spacing-lg: 3rem;
  --dba-core-font: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --dba-core-canvas: #0f172a;
    --dba-core-ink: #f8fafc;
    --dba-core-accent: #ef4444;
    --dba-core-surface: #1e293b;
    --dba-core-edge: #334155;
    --dba-core-faded: #94a3b8;
    --dba-core-focus: rgba(239, 68, 68, 0.15);
  }
}

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

body {
  background-color: var(--dba-core-canvas);
  color: var(--dba-core-ink);
  font-family: var(--dba-core-font);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Unique DOM Layout: The Training Ledger */
.dba-training-ledger {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.dba-ledger-spine {
  background-color: var(--dba-core-surface);
  border-bottom: 2px solid var(--dba-core-accent);
  padding: var(--dba-core-spacing-md) var(--dba-core-spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.dba-ledger-brand {
  font-weight: 800;
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.dba-ledger-directory {
  display: flex;
  gap: var(--dba-core-spacing-md);
}

.dba-directory-link {
  color: var(--dba-core-ink);
  text-decoration: none;
  font-weight: 500;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  transition: background-color 0.2s;
}

.dba-directory-link:hover {
  background-color: var(--dba-core-focus);
  color: var(--dba-core-accent);
}

.dba-ledger-pages {
  flex-grow: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--dba-core-spacing-lg);
  padding: var(--dba-core-spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
}

@media (min-width: 900px) {
  .dba-ledger-pages {
    grid-template-columns: 1fr 1fr;
  }
}

.dba-page-cluster {
  background-color: var(--dba-core-surface);
  border: 1px solid var(--dba-core-edge);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.dba-cluster-visual {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-bottom: 1px solid var(--dba-core-edge);
}

.dba-cluster-content {
  padding: var(--dba-core-spacing-md);
}

.dba-cluster-heading {
  font-size: 2rem;
  margin-bottom: var(--dba-core-spacing-sm);
  color: var(--dba-core-ink);
}

.dba-cluster-detail {
  color: var(--dba-core-faded);
  margin-bottom: var(--dba-core-spacing-md);
  font-size: 1.1rem;
}

.dba-action-trigger {
  display: inline-block;
  background-color: var(--dba-core-accent);
  color: #ffffff !important;
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  font-weight: 600;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.dba-action-trigger:hover {
  opacity: 0.9;
}

.dba-syllabus-register {
  list-style: none;
}

.dba-syllabus-item {
  padding: var(--dba-core-spacing-sm) 0;
  border-bottom: 1px dashed var(--dba-core-edge);
  display: flex;
  align-items: center;
}

.dba-syllabus-item::before {
  content: "→";
  color: var(--dba-core-accent);
  margin-right: 0.5rem;
  font-weight: bold;
}

.dba-ledger-appendix {
  background-color: var(--dba-core-surface);
  border-top: 1px solid var(--dba-core-edge);
  padding: var(--dba-core-spacing-lg);
  margin-top: auto;
}

.dba-appendix-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--dba-core-spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

@media (min-width: 600px) {
  .dba-appendix-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.dba-appendix-node {
  display: flex;
  flex-direction: column;
}

.dba-node-label {
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  font-size: 0.85rem;
  color: var(--dba-core-faded);
}

.dba-node-data {
  font-size: 0.95rem;
}

.dba-node-link {
  color: var(--dba-core-accent);
  text-decoration: none;
  margin-bottom: 0.25rem;
}

.dba-node-link:hover {
  text-decoration: underline;
}

/* Interactive elements */
.dba-format-toggle {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  background: var(--dba-core-focus);
  padding: 0.5rem;
  border-radius: 6px;
}

.dba-format-option {
  flex: 1;
  text-align: center;
  padding: 0.5rem;
  cursor: pointer;
  font-weight: 600;
  border-radius: 4px;
  transition: background-color 0.2s;
}

.dba-format-option.is-selected {
  background-color: var(--dba-core-accent);
  color: #fff;
}

.dba-format-display {
  display: none;
  padding: 1rem;
  border: 1px solid var(--dba-core-edge);
  border-radius: 6px;
  margin-bottom: 1rem;
}

.dba-format-display.is-active {
  display: block;
}

/* Enrollment Modal */
.dba-enrollment-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.8);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: 1rem;
}

.dba-enrollment-overlay.is-visible {
  display: flex;
}

.dba-enrollment-dialog {
  background: var(--dba-core-surface);
  padding: 2rem;
  border-radius: 8px;
  width: 100%;
  max-width: 500px;
  position: relative;
}

.dba-dialog-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--dba-core-ink);
}

.dba-input-field {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 1rem;
  border: 1px solid var(--dba-core-edge);
  border-radius: 4px;
  background: var(--dba-core-canvas);
  color: var(--dba-core-ink);
}

.dba-enrollment-feedback {
  display: none;
  padding: 1rem;
  background: rgba(34, 197, 94, 0.1);
  color: #16a34a;
  border: 1px solid #16a34a;
  border-radius: 4px;
  margin-top: 1rem;
}

/* Cookie Banner */
.dba-privacy-notice {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  background: var(--dba-core-ink);
  color: var(--dba-core-canvas);
  padding: 1rem;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  z-index: 999;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

@media (min-width: 600px) {
  .dba-privacy-notice {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    left: auto;
    width: 400px;
  }
}

.dba-privacy-accept {
  background: var(--dba-core-accent);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
  white-space: nowrap;
}