/* Course chrome + Python editor — portfolio design tokens */

.portfolio-back {
  position: fixed;
  top: 0.85rem;
  left: 0.85rem;
  z-index: 200;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-sans, "DM Sans", system-ui, sans-serif);
  color: var(--text-muted, #8fa3b8);
  background: var(--surface, #232d3b);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.08));
  border-radius: 999px;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  transition: color 0.2s, border-color 0.2s;
}

.portfolio-back:hover {
  color: var(--accent, #3d9cfd);
  border-color: rgba(61, 156, 253, 0.35);
  text-decoration: none;
}

.course-nav-toggle {
  display: none;
  position: fixed;
  top: 0.85rem;
  right: 0.85rem;
  z-index: 200;
  padding: 0.5rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 600;
  font-family: var(--font-sans, "DM Sans", system-ui, sans-serif);
  color: var(--text, #e8eef4);
  background: var(--surface, #232d3b);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.08));
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

@media (min-width: 769px) {
  .portfolio-back {
    left: calc(var(--sidebar-width, 280px) + 1rem);
  }

  .course-nav-toggle {
    display: none !important;
  }

  /* DSA course — sidebar + content columns */
  body.course-page .layout {
    padding-top: 0;
  }

  body.course-page .layout > nav {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width, 280px);
    height: 100vh;
    padding-top: 1rem;
    z-index: 60;
    overflow-y: auto;
  }

  body.course-page .layout > main {
    margin-left: var(--sidebar-width, 280px) !important;
    margin-right: 0 !important;
    width: calc(100% - var(--sidebar-width, 280px)) !important;
    max-width: none !important;
  }

  /* DSA header spans content column only */
  body.course-page > header:not(.course-topbar) {
    left: var(--sidebar-width, 280px);
    width: calc(100% - var(--sidebar-width, 280px));
  }

  /* AI course — keep sidebar and content separate */
  body.course-page .container > .sidebar {
    display: block !important;
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width, 280px);
    height: 100vh;
    z-index: 60;
    overflow-y: auto;
  }

  body.course-page .container > .content {
    margin-left: var(--sidebar-width, 280px) !important;
    width: calc(100% - var(--sidebar-width, 280px)) !important;
    max-width: none !important;
  }

  .course-nav-backdrop {
    display: none !important;
  }

  body.course-page .layout > main {
    padding: calc(var(--header-height, 56px) + 1.5rem) clamp(1.25rem, 3vw, 2.5rem) 4rem !important;
  }
}

.course-nav-toggle[aria-expanded="true"] {
  background: var(--accent, #3d9cfd);
  color: #0f1419;
  border-color: var(--accent, #3d9cfd);
}

body.py-editor-open {
  overflow: hidden;
}

body.course-nav-drawer-open {
  overflow: hidden;
}

/* Code block actions */
pre.code-runnable {
  position: relative;
  padding-top: 2.35rem !important;
}

.code-run-btn {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  padding: 0.3rem 0.7rem;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: var(--font-sans, "DM Sans", system-ui, sans-serif);
  color: #0f1419;
  background: var(--accent, #3d9cfd);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  z-index: 2;
}

.code-run-btn:hover {
  background: var(--accent-hover, #5aadff);
}

/* Python editor — centered modal */
.py-editor-fab {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 300;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  font-family: var(--font-sans, "DM Sans", system-ui, sans-serif);
  color: #0f1419;
  background: linear-gradient(135deg, var(--accent, #3d9cfd), var(--accent-2, #7c5cff));
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(61, 156, 253, 0.3);
  transition: opacity 0.2s, transform 0.2s;
}

.py-editor-fab:hover {
  transform: translateY(-1px);
}

body.py-editor-open .py-editor-fab {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}

.py-editor-overlay {
  position: fixed;
  inset: 0;
  z-index: 350;
  display: none;
  background: rgba(8, 10, 14, 0.72);
  backdrop-filter: blur(4px);
}

.py-editor-overlay.is-open {
  display: block;
}

.py-editor-panel {
  position: fixed;
  z-index: 400;
  display: none;
  flex-direction: column;
  width: min(920px, calc(100vw - 1.5rem));
  height: min(78vh, 720px);
  max-height: calc(100vh - 2rem);
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-elevated, #1a222d);
  border: 1px solid var(--border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius, 12px);
  box-shadow: var(--shadow, 0 24px 48px rgba(0, 0, 0, 0.35));
  overflow: hidden;
}

.py-editor-panel.is-open {
  display: flex;
}

.py-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-shrink: 0;
  padding: 0.85rem 1rem;
  background: var(--surface, #232d3b);
  border-bottom: 1px solid var(--border, rgba(255, 255, 255, 0.08));
}

.py-editor-header-left {
  min-width: 0;
}

.py-editor-title {
  margin: 0;
  font-family: var(--font-display, "Fraunces", Georgia, serif);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text, #e8eef4);
}

.py-editor-status {
  margin-top: 0.15rem;
  font-size: 0.75rem;
  color: var(--text-muted, #8fa3b8);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.py-editor-actions {
  display: flex;
  gap: 0.45rem;
  flex-shrink: 0;
}

.py-editor-actions button,
.py-editor-close {
  padding: 0.42rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-sans, "DM Sans", system-ui, sans-serif);
  border-radius: 8px;
  border: 1px solid var(--border, rgba(255, 255, 255, 0.08));
  background: var(--bg-elevated, #1a222d);
  color: var(--text, #e8eef4);
  cursor: pointer;
  white-space: nowrap;
}

.py-editor-actions button.primary {
  background: var(--accent, #3d9cfd);
  border-color: var(--accent, #3d9cfd);
  color: #0f1419;
}

.py-editor-actions button.primary:hover {
  background: var(--accent-hover, #5aadff);
}

.py-editor-tabs {
  display: flex;
  gap: 0;
  flex-shrink: 0;
  background: var(--bg, #0f1419);
  border-bottom: 1px solid var(--border, rgba(255, 255, 255, 0.08));
}

.py-editor-tab {
  flex: 1;
  padding: 0.55rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: var(--font-sans, "DM Sans", system-ui, sans-serif);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted, #8fa3b8);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
}

.py-editor-tab.is-active {
  color: var(--text, #e8eef4);
  border-bottom-color: var(--accent, #3d9cfd);
  background: var(--accent-soft, rgba(61, 156, 253, 0.15));
}

.py-editor-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.py-editor-pane {
  display: none;
  flex: 1;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.py-editor-pane.is-active {
  display: flex;
}

.py-editor-pane-label {
  flex-shrink: 0;
  padding: 0.4rem 0.85rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted, #8fa3b8);
  background: var(--bg, #0f1419);
  border-bottom: 1px solid var(--border, rgba(255, 255, 255, 0.08));
}

.py-editor-code {
  flex: 1;
  width: 100%;
  min-height: 0;
  padding: 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--code-text, #e2e8f0);
  background: var(--code-bg, #121820);
  border: none;
  resize: none;
  outline: none;
  overflow: auto;
  box-sizing: border-box;
  tab-size: 4;
}

.py-editor-output {
  flex: 1;
  min-height: 0;
  margin: 0;
  padding: 1rem;
  overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--text-muted, #8fa3b8);
  background: var(--code-bg, #121820);
  white-space: pre-wrap;
  word-break: break-word;
  box-sizing: border-box;
}

.py-editor-output:empty::before {
  content: "Output will appear here after you run the code.";
  color: #5a6d82;
  font-style: italic;
}

@media (min-width: 768px) {
  .py-editor-tabs {
    display: none;
  }

  .py-editor-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr;
  }

  .py-editor-pane {
    display: flex !important;
    border-right: 1px solid var(--border, rgba(255, 255, 255, 0.08));
  }

  .py-editor-pane:last-child {
    border-right: none;
  }
}

@media (max-width: 767px) {
  .py-editor-panel {
    width: calc(100vw - 0.75rem);
    height: calc(100dvh - 0.75rem);
    max-height: none;
    border-radius: 10px;
  }

  .py-editor-header {
    flex-wrap: wrap;
    padding: 0.7rem 0.85rem;
  }

  .py-editor-actions {
    width: 100%;
    justify-content: flex-end;
  }

  .py-editor-actions button:not(.primary):not(.py-editor-close) {
    display: none;
  }

  .py-editor-fab {
    bottom: 1rem;
    right: 1rem;
  }
}