/* ── opnF Terminal ─────────────────────────────────────── */

.opnf-terminal-wrap {
  --t-bg: #0d0d0d;
  --t-bg-header: #111;
  --t-border: #222;
  --t-text: #d4d4d4;
  --t-dim: #888;
  --t-muted: #555;
  --t-accent: #ff6b1a;
  --t-green: #22c55e;
  --t-blue: #3b82f6;
  --t-red: #ef4444;
  --t-white: #e8e8e8;
  --t-font: 'DM Mono', 'Menlo', 'Consolas', monospace;
  --t-radius: 6px;
  /* --course-accent is overridden inline per course by terminal-fullwidth.php
     (e.g. style="--course-accent:#3b82f6" for devops). Fallback to --t-accent
     so the terminal still has a coherent accent when the inline value is absent. */
  --course-accent: var(--t-accent);
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

/* ── Header bar ───────────────────────────────────────── */

.opnf-t-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--t-bg-header);
  border: 1px solid var(--t-border);
  border-bottom: none;
  border-radius: var(--t-radius) var(--t-radius) 0 0;
  font-family: var(--t-font);
  font-size: 12px;
  gap: 16px;
  flex-wrap: wrap;
}

.opnf-t-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.opnf-t-course-name {
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.opnf-t-breadcrumb {
  color: var(--t-dim);
  font-size: 11px;
}

.opnf-t-header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.opnf-t-progress-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.opnf-t-progress-bar {
  width: 100px;
  height: 10px;
  background: var(--t-border);
  border-radius: 2px;
  overflow: hidden;
}

.opnf-t-progress-fill {
  height: 100%;
  background: var(--t-accent);
  border-radius: 2px;
  transition: width 0.3s;
  width: 0%;
}

.opnf-t-progress-pct {
  color: var(--t-dim);
  font-size: 11px;
  min-width: 28px;
  text-align: right;
}

/* ── Window controls ──────────────────────────────────── */

.opnf-t-controls {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 8px;
}
.opnf-t-ctrl {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  border: 1px solid var(--t-border);
  background: transparent;
  color: var(--t-dim);
  font-family: var(--t-font);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
  padding: 0;
}
.opnf-t-ctrl:hover {
  color: var(--t-white);
  border-color: var(--t-dim);
  background: rgba(255, 255, 255, 0.05);
}
.opnf-t-ctrl-close:hover {
  color: #fff;
  background: var(--t-red);
  border-color: var(--t-red);
}

/* ── Terminal body ────────────────────────────────────── */

.opnf-t-body {
  background: var(--t-bg);
  border: 1px solid var(--t-border);
  border-radius: 0 0 var(--t-radius) var(--t-radius);
  padding: 24px 24px 0 24px;
  height: 500px;
  overflow-y: auto;
  font-family: var(--t-font);
  font-size: 14px;
  line-height: 1.7;
  color: var(--t-text);
  cursor: text;
  position: relative;
}

/* Splash-only: lock scroll and center content vertically within the body. */
.opnf-t-body:has(.opnf-t-splash) {
  overflow: hidden;
}
.opnf-t-body:has(.opnf-t-splash) .opnf-t-output {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.opnf-t-body:has(.opnf-t-play-overlay) {
  overflow: hidden;
}

/* Scrollbar */
.opnf-t-body::-webkit-scrollbar { width: 6px; }
.opnf-t-body::-webkit-scrollbar-track { background: transparent; }
.opnf-t-body::-webkit-scrollbar-thumb {
  background: var(--t-muted);
  border-radius: 3px;
}
.opnf-t-body::-webkit-scrollbar-thumb:hover { background: var(--t-dim); }

/* ── Output lines ─────────────────────────────────────── */

.opnf-t-output {
  white-space: pre-wrap;
  word-break: break-word;
}

/* ── Input line ───────────────────────────────────────── */

.opnf-t-input-line {
  display: flex;
  align-items: center;
  margin-top: 4px;
}

.opnf-t-prompt {
  color: var(--t-accent);
  margin-right: 8px;
  flex-shrink: 0;
  user-select: none;
}

.opnf-t-input {
  background: none;
  border: none;
  outline: none;
  color: var(--t-white);
  font-family: var(--t-font);
  font-size: 14px;
  flex: 1;
  caret-color: var(--t-accent);
  line-height: 1.7;
}

/* ── Cursor blink ─────────────────────────────────────── */

@keyframes opnf-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ── Simulator shared styles (vim / less / nano / top) ─── */
/* Base classes for the full-screen simulators. Per-simulator modifiers
   (.vim-*, .less-*, .nano-*, .top-*) only carry rules that truly differ. */

.sim-display {
  font-family: var(--t-font);
  font-size: 14px;
  line-height: 1.5;
  height: 100%;
  display: flex;
  flex-direction: column;
  outline: none;
  color: var(--t-text);
  background: var(--t-bg);
}

.sim-statusbar {
  padding: 4px 12px;
  background: var(--t-border);
  color: var(--t-dim);
  font-size: 12px;
  flex-shrink: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.sim-statusbar-left {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sim-statusbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.sim-help-btn {
  font-family: var(--t-font);
  font-size: 12px;
  color: var(--t-dim);
  border: 1px solid var(--t-border);
  background: var(--t-bg);
  padding: 2px 8px;
  border-radius: 3px;
  cursor: pointer;
  user-select: none;
}
.sim-help-btn:hover,
.sim-help-btn:active {
  color: var(--t-accent);
  border-color: var(--t-accent);
}

.sim-help-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.95);
  font-family: var(--t-font);
  font-size: 13px;
  color: var(--t-dim);
  padding: 24px;
  overflow-y: auto;
  z-index: 10;
}

.sim-help-title {
  color: var(--t-white);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--t-border);
}

.sim-help-row {
  display: flex;
  align-items: baseline;
  padding: 4px 0;
  gap: 12px;
}

.sim-help-desc {
  color: var(--t-dim);
  flex: 1;
}

.sim-help-hint {
  text-align: center;
  color: var(--t-muted);
  font-size: 11px;
  margin-top: 24px;
  padding-top: 12px;
  border-top: 1px solid var(--t-border);
}

/* ── Text styles ──────────────────────────────────────── */

.t-accent { color: var(--t-accent); }
.t-green { color: var(--t-green); }
.t-blue { color: var(--t-blue); }
.t-red { color: var(--t-red); }
.t-dim { color: var(--t-dim); }
.t-muted { color: var(--t-muted); }
.t-white { color: var(--t-white); }
.t-bold { font-weight: 500; }

/* ── Section header (orange bar) ──────────────────────── */

.t-section-header {
  color: var(--t-accent);
  font-weight: 500;
  padding: 4px 0;
  margin: 16px 0 8px;
  border-bottom: 1px solid var(--t-border);
  letter-spacing: 0.04em;
}

/* ── Menu items ───────────────────────────────────────── */

.t-menu-item {
  padding: 2px 0;
  cursor: pointer;
  transition: color 0.1s;
}
.t-menu-item:hover {
  color: var(--t-white);
}
.t-menu-num {
  color: var(--t-accent);
  margin-right: 8px;
}

/* ── Practice block ───────────────────────────────────── */

.t-practice {
  margin: 12px 0;
  padding: 12px 16px;
  border-left: 2px solid var(--t-accent);
  background: rgba(255, 107, 26, 0.03);
}
.t-practice-cmd {
  color: var(--t-green);
  font-weight: 500;
}
.t-practice-desc {
  color: var(--t-dim);
  font-size: 12px;
  margin: 4px 0 8px;
}
.t-practice-output {
  color: var(--t-text);
  font-size: 13px;
  opacity: 0.85;
}

/* ── Mnemonic / tip ───────────────────────────────────── */

.t-mnemonic {
  color: var(--t-muted);
  font-size: 12px;
  font-style: italic;
  margin: 4px 0 12px;
  padding-left: 16px;
  border-left: 1px solid var(--t-border);
}

/* ── Lab task container ───────────────────────────────── */

.t-lab-task {
  margin: 8px 0;
  padding: 8px 0;
}

/* ── Continue prompt ──────────────────────────────────── */

.t-continue {
  color: var(--t-dim);
  margin: 16px 0 4px;
  animation: opnf-blink 1.5s step-end infinite;
}

/* ── Responsive ───────────────────────────────────────── */

/* Total Course Progress: desktop lives in the course header; mobile in its own section. */
#opnf-course-progress-mobile { display: none; }

@media (max-width: 768px) {
  #opnf-course-progress-header { display: none; }
  #opnf-course-progress-mobile { display: block; }

  .opnf-terminal-wrap {
    padding: 20px 12px 60px;
  }

  /* Two-row header: row 1 = course name + controls,
     row 2 = breadcrumb + progress. The left/right wrappers
     use display:contents so their children participate in
     the header's grid directly. */
  .opnf-t-header {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    align-items: center;
    gap: 8px 12px;
    padding: 10px 14px;
    font-size: 11px;
  }
  .opnf-t-header-left,
  .opnf-t-header-right {
    display: contents;
  }
  .opnf-t-course-name {
    grid-row: 1;
    grid-column: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .opnf-t-controls {
    grid-row: 1;
    grid-column: 2;
    justify-self: end;
    margin-left: 0;
  }
  .opnf-t-breadcrumb {
    grid-row: 2;
    grid-column: 1;
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .opnf-t-progress-wrap {
    grid-row: 2;
    grid-column: 2;
    justify-self: end;
  }

  .opnf-t-ctrl {
    width: 24px;
    height: 24px;
    font-size: 14px;
  }
  .opnf-t-body {
    padding: 16px;
    font-size: 13px;
    height: 440px;
  }
  .opnf-t-splash-img {
    width: 140px;
  }
  .opnf-t-progress-bar {
    width: 60px;
    height: 8px;
  }
}

@media (max-width: 480px) {
  .opnf-t-body {
    font-size: 12px;
    padding: 12px;
    height: 350px;
  }
}

/* ── Curriculum nav (terminal page) ───────────────────── */

.term-nav-item {
  cursor: pointer;
  transition: background 0.1s;
  border-radius: var(--t-radius);
  padding: 10px 8px !important;
}
.term-nav-item:hover {
  background: rgba(255, 255, 255, 0.03);
}
.term-nav-active {
  background: rgba(255, 107, 26, 0.06) !important;
  border-left: 2px solid var(--t-accent);
  padding-left: 6px !important;
}
.term-nav-status {
  margin-left: auto;
  flex-shrink: 0;
}

/* ── Play overlay ─────────────────────────────────────── */

.opnf-t-play-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 360px;
  gap: 20px;
  text-align: center;
}
.opnf-t-play-type {
  font-family: var(--t-font, 'DM Mono', monospace);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--t-dim, #888);
}
.opnf-t-play-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--t-white, #e8e8e8);
  max-width: 500px;
  line-height: 1.3;
}
.opnf-t-play-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--t-font, 'DM Mono', monospace);
  font-size: 14px;
  font-weight: 500;
  color: var(--t-bg, #0d0d0d);
  background: var(--course-accent, var(--t-accent, #ff6b1a));
  border: none;
  border-radius: 6px;
  padding: 14px 36px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, filter 0.15s;
  margin-top: 8px;
}
.opnf-t-play-btn:hover {
  filter: brightness(1.12);
  transform: scale(1.02);
}
.opnf-t-play-btn:active {
  transform: scale(0.98);
}
.opnf-t-play-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}
/* Secondary outline variant — e.g. "Start Quiz" on a tutorial preview */
.opnf-t-play-btn-secondary {
  color: var(--course-accent, var(--t-accent, #ff6b1a));
  background: transparent;
  border: 1px solid var(--course-accent, var(--t-accent, #ff6b1a));
}
.opnf-t-play-btn-secondary:hover {
  background: color-mix(in srgb, var(--course-accent, var(--t-accent, #ff6b1a)) 10%, transparent);
  filter: none;
}
.opnf-t-play-meta {
  font-family: var(--t-font, 'DM Mono', monospace);
  font-size: 12px;
  color: var(--t-muted, #555);
  margin-top: 4px;
}
@media (max-width: 768px) {
  .opnf-t-play-overlay {
    min-height: 0;
    justify-content: flex-start;
    padding-top: 20px;
  }
}

/* ── Mobile fullscreen mode ───────────────────────────── */

.opnf-terminal-fullscreen {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  background: var(--t-bg, #0d0d0d);
  padding: 0;
  max-width: none;
  display: flex;
  flex-direction: column;
}
.opnf-terminal-fullscreen .opnf-t-header {
  border-radius: 0;
  flex-shrink: 0;
}
.opnf-terminal-fullscreen .opnf-t-body {
  border-radius: 0;
  border-left: none;
  border-right: none;
  border-bottom: none;
  height: auto;
  flex: 1;
}
/* Hide search clear button from type=search */
.opnf-t-input::-webkit-search-cancel-button,
.opnf-t-input::-webkit-search-decoration {
  display: none;
  -webkit-appearance: none;
}

/* ── Vim simulator (unique rules only — shared rules are in .sim-* above) ── */

.vim-content {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  min-height: 0;
  position: relative;
}
.vim-line {
  display: flex;
  min-height: 1.5em;
  white-space: pre;
}
.vim-linenum {
  color: var(--t-muted);
  text-align: right;
  min-width: 3em;
  padding-right: 1em;
  user-select: none;
  flex-shrink: 0;
}
.vim-linetext {
  white-space: pre;
  flex: 1;
}
.vim-tilde {
  color: var(--t-accent);
  padding-left: 4em;
  min-height: 1.5em;
}
.vim-cursor-block {
  background: var(--t-text);
  color: var(--t-bg);
}
.vim-cursor-line {
  border-left: 2px solid var(--t-accent);
}
/* vim-statusbar modifier: different color + padding than the shared .sim-statusbar */
.vim-statusbar {
  padding: 4px 8px;
  color: var(--t-text);
}
.vim-mode {
  color: var(--t-accent);
  letter-spacing: 0.05em;
  font-weight: 500;
}
.vim-command-line {
  padding: 2px 8px;
  font-size: 14px;
  min-height: 1.5em;
  flex-shrink: 0;
  color: var(--t-text);
  font-family: var(--t-font);
}
.vim-error {
  color: var(--t-red);
}
.vim-search-match {
  background: rgba(255, 107, 26, 0.3);
}
.vim-pending {
  color: var(--t-dim);
}

/* Vim overflow lock: terminal body yields its scrollbar + padding to vim */
.opnf-t-body.vim-active {
  overflow: hidden;
  padding: 0;
}

/* Vim help layout differs from less/top — 2-column grid */
.vim-help-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  max-width: 720px;
  margin: 0 auto;
}
.vim-help-key {
  color: var(--t-accent);
  min-width: 7em;
  white-space: nowrap;
}
/* vim-help-hint modifier: spans full grid width in vim's 2-column help layout */
.vim-help-hint {
  grid-column: 1 / -1;
}

@media (max-width: 640px) {
  .vim-help-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .vim-help-key {
    min-width: 6em;
  }
}

/* ── Splash screen ──────────────────────────────────────── */

.opnf-t-splash {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  gap: 16px;
  text-align: center;
}
.opnf-t-splash-img {
  width: 200px;
  max-width: 60%;
  height: auto;
  display: block;
  margin-bottom: 8px;
  opacity: 0.5;
}
.opnf-t-splash-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--t-white);
  letter-spacing: -0.01em;
  opacity: 0.5;
}
.opnf-t-splash-sub {
  font-family: var(--t-font);
  font-size: 14px;
  color: var(--t-dim);
  opacity: 0.5;
}
.opnf-terminal-fullscreen .opnf-t-splash {
  min-height: 0;
  flex: 1;
}

/* ── Fullscreen button ──────────────────────────────────── */

.opnf-t-ctrl-fullscreen {
  font-size: 14px;
}

/* ── Less pager simulator (unique rules only — shared rules are in .sim-* above) ── */

.less-header {
  padding: 4px 12px;
  color: var(--t-dim);
  font-size: 12px;
  border-bottom: 1px solid var(--t-border);
  flex-shrink: 0;
}
.less-content {
  flex: 1;
  overflow-y: hidden;
  padding: 8px 16px;
  min-height: 0;
  position: relative;
}
.less-line {
  min-height: 1.5em;
  white-space: pre-wrap;
}
.less-tilde {
  color: var(--t-muted);
}
.less-highlight {
  background: rgba(255, 107, 26, 0.3);
}
.less-cursor {
  color: var(--t-accent);
  animation: opnf-blink 0.8s step-end infinite;
}
.less-status-hint {
  color: var(--t-dim);
  font-size: 12px;
  white-space: nowrap;
}
.less-help-inner {
  max-width: 520px;
  margin: 0 auto;
}
.less-help-key {
  color: var(--t-accent);
  min-width: 10em;
  white-space: nowrap;
}

/* ── Nano editor simulator (unique rules only — shared rules are in .sim-* above) ── */

.nano-header {
  padding: 4px 12px;
  background: var(--t-white);
  color: var(--t-bg);
  font-size: 13px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  flex-shrink: 0;
}
.nano-header-brand {
  text-align: left;
  font-weight: 500;
}
.nano-header-file {
  text-align: center;
  justify-self: center;
}
.nano-header-spacer {
  text-align: right;
}
.nano-content {
  flex: 1;
  overflow-y: hidden;
  padding: 8px 12px;
  min-height: 0;
  cursor: text;
}
.nano-line {
  min-height: 1.5em;
  white-space: pre-wrap;
}
.nano-cursor {
  background: var(--t-text);
  color: var(--t-bg);
}
.nano-status {
  padding: 2px 12px;
  font-size: 12px;
  color: var(--t-text);
  flex-shrink: 0;
  min-height: 20px;
  font-family: var(--t-font);
}
.nano-dim {
  color: var(--t-dim);
}
.nano-prompt {
  color: var(--t-accent);
  font-weight: 500;
}

/* Two-row shortcut bar — tappable buttons, no built-in border since it's a grid */
.nano-shortcut-bar {
  flex-shrink: 0;
  padding: 4px 6px;
  background: var(--t-border);
  font-size: 12px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px 8px;
  font-family: var(--t-font);
}
.nano-shortcut {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 4px 6px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 3px;
  color: var(--t-text);
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  text-align: left;
  min-width: 0;
  transition: background 0.1s, border-color 0.1s;
}
.nano-shortcut:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--t-dim);
}
.nano-shortcut:active {
  background: rgba(255, 107, 26, 0.1);
  border-color: var(--t-accent);
}
.nano-shortcut-key {
  background: var(--t-white);
  color: var(--t-bg);
  padding: 0 4px;
  font-weight: 500;
  flex-shrink: 0;
}
.nano-shortcut-label {
  color: var(--t-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 600px) {
  .nano-shortcut-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 2px 4px;
  }
}

/* ── Top process monitor (unique rules only — shared rules are in .sim-* above) ── */

/* top-display modifier: denser font for the process table */
.top-display {
  font-size: 13px;
  line-height: 1.4;
}
.top-content {
  flex: 1;
  overflow-y: hidden;
  padding: 8px 12px;
  min-height: 0;
  position: relative;
}
.top-line {
  white-space: pre;
  font-family: var(--t-font);
  min-height: 1.4em;
}
.top-col-header {
  background: var(--t-text);
  color: var(--t-bg);
  font-weight: 500;
}
.top-help-inner {
  max-width: 560px;
  margin: 0 auto;
}
.top-help-key {
  color: var(--t-accent);
  min-width: 8em;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .top-display { font-size: 11px; }
}