@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("/fonts/dmsans-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("/fonts/dmsans-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Montserrat";
  font-style: normal;
  font-weight: 600 800;
  font-display: swap;
  src: url("/fonts/montserrat-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Montserrat";
  font-style: normal;
  font-weight: 600 800;
  font-display: swap;
  src: url("/fonts/montserrat-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

html {
  /* ~one step up from typical 16px default; scales all rem-based UI text */
  font-size: 112.5%;
}

:root {
  --ember: #f15e22;
  --starry: #13151d;
  --smoke: #f9f9fa;
  --ash: #c7cbd1;
  --icon-chevron-left: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m15 18-6-6 6-6'/%3E%3C/svg%3E");
  --icon-chevron-right: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m9 18 6-6-6-6'/%3E%3C/svg%3E");
  --icon-grid: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect width='7' height='7' x='3' y='3' rx='1'/%3E%3Crect width='7' height='7' x='14' y='3' rx='1'/%3E%3Crect width='7' height='7' x='14' y='14' rx='1'/%3E%3Crect width='7' height='7' x='3' y='14' rx='1'/%3E%3C/svg%3E");
}

:root,
html[data-theme="dark"] {
  color-scheme: dark;
  --bg: var(--starry);
  --surface: color-mix(in srgb, var(--starry) 88%, var(--ash));
  --surface2: color-mix(in srgb, var(--starry) 78%, var(--ash));
  --border: color-mix(in srgb, var(--ash) 38%, var(--starry));
  --text: var(--smoke);
  --muted: var(--ash);
  --accent: var(--ember);
  --accent-dim: color-mix(in srgb, var(--ember) 78%, var(--starry));
  --on-accent: var(--smoke);
  --ok: #3dd68c;
  --warn: #f0c14b;
  --danger: #f07178;
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
  --font-display: "Montserrat", var(--font);
  --mono: "Consolas", "Courier New", monospace;
  --body-glow: color-mix(in srgb, var(--ember) 16%, var(--bg));
  --topbar-bg: color-mix(in srgb, var(--starry) 92%, transparent);
  --accent-soft: color-mix(in srgb, var(--ember) 16%, transparent);
  --code-bg: color-mix(in srgb, var(--starry) 94%, black);
  --code-selected-bg: color-mix(in srgb, var(--danger) 18%, transparent);
  --code-selected-fg: #ffd7d9;
  --overlay: color-mix(in srgb, var(--starry) 78%, transparent);
  --shadow: color-mix(in srgb, var(--starry) 70%, transparent);
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: var(--smoke);
  --surface: var(--smoke);
  --surface2: color-mix(in srgb, var(--smoke) 68%, var(--ash));
  --border: var(--ash);
  --text: var(--starry);
  --muted: color-mix(in srgb, var(--starry) 58%, var(--ash));
  --accent: var(--ember);
  --accent-dim: color-mix(in srgb, var(--ember) 82%, var(--starry));
  --on-accent: var(--smoke);
  --ok: #1b8f58;
  --warn: #b3860b;
  --danger: #c4454c;
  --body-glow: color-mix(in srgb, var(--ember) 10%, var(--bg));
  --topbar-bg: color-mix(in srgb, var(--smoke) 92%, transparent);
  --accent-soft: color-mix(in srgb, var(--ember) 12%, transparent);
  --code-bg: color-mix(in srgb, var(--smoke) 72%, var(--ash));
  --code-selected-bg: color-mix(in srgb, var(--danger) 14%, transparent);
  --code-selected-fg: #7a2430;
  --overlay: color-mix(in srgb, var(--starry) 48%, transparent);
  --shadow: color-mix(in srgb, var(--starry) 16%, transparent);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(900px 480px at 8% -8%, var(--body-glow) 0%, transparent 55%), var(--bg);
  color: var(--text);
  line-height: 1.5;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
}

/* --- Top bar ----------------------------------------------------------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--topbar-bg);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  display: block;
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0;
  background: url("/campfire-mark.png") center / contain no-repeat;
  box-shadow: none;
}

.brand h1 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}

/* --- Layout shell ------------------------------------------------------ */
.shell {
  display: grid;
  grid-template-columns: min(280px, 100%) 1fr;
  gap: 0;
  max-width: 1480px;
  margin: 0 auto;
  min-height: calc(100vh - 5rem);
}

.shell.sidebar-collapsed {
  grid-template-columns: minmax(2.85rem, 3.35rem) 1fr;
}

@media (max-width: 840px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .shell.sidebar-collapsed {
    grid-template-columns: 1fr;
  }

  .progress-panel {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .shell.sidebar-collapsed .progress-panel {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .shell.sidebar-collapsed .task-list {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.2rem 0.35rem;
  }

  .shell.sidebar-collapsed .task-list li {
    border-bottom: none;
    padding: 0.2rem 0.25rem;
  }
}

/* --- Progress panel (sidebar) ------------------------------------------ */
.progress-panel {
  padding: 1.25rem 1.25rem 2rem;
  border-right: 1px solid var(--border);
  background: var(--surface);
}

.progress-panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.progress-collapse-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  min-width: 2rem;
  min-height: 2rem;
  padding: 0;
  border-color: transparent;
  background: transparent;
  color: var(--muted);
}

.progress-collapse-btn:hover:not(:disabled) {
  border-color: transparent;
  color: var(--accent);
  background: var(--accent-soft);
}

.progress-collapse-icon {
  display: block;
  width: 0.95rem;
  height: 0.95rem;
  font-size: 0;
  line-height: 0;
  color: inherit;
  transition: transform 0.2s ease;
  background: currentColor;
  mask: var(--icon-chevron-left) center / contain no-repeat;
  -webkit-mask: var(--icon-chevron-left) center / contain no-repeat;
}

.shell.sidebar-collapsed .progress-collapse-icon {
  transform: rotate(180deg);
}

.shell.sidebar-collapsed .step-meta {
  display: none;
}

.shell.sidebar-collapsed .task-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.shell.sidebar-collapsed .progress-panel {
  padding: 0.55rem 0.3rem 1rem;
}

.shell.sidebar-collapsed .progress-panel-header {
  justify-content: center;
  margin-bottom: 0.35rem;
}

.shell.sidebar-collapsed .task-list li {
  position: relative;
  justify-content: center;
  padding: 0.32rem 0;
}

.shell.sidebar-collapsed .task-list li[data-step-nav] {
  padding-left: 0;
  margin-left: 0;
}

.shell.sidebar-collapsed .task-list li.current {
  border-left: none;
  margin-left: 0;
  padding-left: 0;
  background: var(--accent-soft);
  border-radius: 0.35rem;
}

.shell.sidebar-collapsed .task-list li .task-icon {
  font-size: 1.05rem;
  min-width: 1.25rem;
}

.progress-panel h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.step-meta {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.task-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.task-list li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
}

.task-list li[data-step-nav] {
  cursor: pointer;
  border-radius: 0.35rem;
  padding-left: 0.4rem;
  margin-left: -0.4rem;
  transition: background 0.15s ease;
}

.task-list li[data-step-nav]:hover:not(.locked) {
  background: var(--surface2);
}

.task-list li.current {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  padding-left: calc(0.4rem - 3px);
  margin-left: -0.4rem;
}

.task-list li.locked {
  opacity: 0.42;
  cursor: not-allowed;
  pointer-events: none;
}

.task-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  flex: 0 0 1.25rem;
  text-align: center;
}

.task-list li.done {
  color: var(--ok);
}

.task-list li.done .task-icon {
  color: var(--ok);
}

/* --- Content area ------------------------------------------------------ */
.content {
  padding: 1.25rem 1.5rem 3rem;
}

.step-nav {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  column-gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.step-nav-start {
  justify-self: start;
  display: flex;
  align-items: center;
}

.step-nav-verify {
  justify-self: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-nav-end {
  justify-self: end;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 2.4rem;
}

.step-nav .btn {
  font-family: var(--font-display);
  font-weight: 700;
  min-height: 2.4rem;
  line-height: 1;
  padding-block: 0;
  padding-inline: 1.05rem;
}

@media (max-width: 640px) {
  .step-nav {
    grid-template-columns: 1fr 1fr;
    row-gap: 0.65rem;
  }

  .step-nav-verify {
    grid-column: 1 / -1;
  }
}

.step-panels {
  min-height: 12rem;
  overflow: visible;
}

.step-pane {
  display: none;
  margin-bottom: 0;
}

.step-pane.is-active {
  display: block;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  padding: 1.25rem 1.35rem;
  margin-bottom: 1.25rem;
}

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.card > p {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

/* --- Buttons ----------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
  line-height: 1;
  min-height: 2.375rem;
  cursor: pointer;
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.5rem 1rem;
  background: transparent;
  color: var(--text);
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn[hidden] {
  display: none !important;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-display);
  font-weight: 700;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn-small {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.32rem 0.7rem;
  min-height: 0;
}

.home-link::before,
#btn-back::before,
#btn-next::after {
  content: "";
  display: block;
  width: 0.875rem;
  height: 0.875rem;
  flex-shrink: 0;
  background: currentColor;
}

#btn-back::before,
#btn-next::after {
  transform: translateY(0.5px);
}

.home-link::before {
  mask: var(--icon-grid) center / contain no-repeat;
  -webkit-mask: var(--icon-grid) center / contain no-repeat;
}

#btn-back::before {
  mask: var(--icon-chevron-left) center / contain no-repeat;
  -webkit-mask: var(--icon-chevron-left) center / contain no-repeat;
}

#btn-next::after {
  mask: var(--icon-chevron-right) center / contain no-repeat;
  -webkit-mask: var(--icon-chevron-right) center / contain no-repeat;
}

.btn-ghost.progress-collapse-btn {
  border-color: transparent;
  background: transparent;
}

.btn-ghost.progress-collapse-btn:hover:not(:disabled) {
  border-color: transparent;
  color: var(--accent);
  background: var(--accent-soft);
}

/* --- Drag and drop ----------------------------------------------------- */
.dd-layout {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: stretch;
}

.dd-source {
  min-height: 160px;
  padding: 0.65rem;
  border: 1px dashed var(--border);
  border-radius: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.dd-targets {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  align-content: start;
}

@media (min-width: 720px) {
  .dd-layout {
    flex-direction: row;
    align-items: stretch;
  }

  .dd-layout .dd-source {
    flex: 0 0 clamp(210px, 28%, 280px);
    min-height: 240px;
  }

  .dd-layout .dd-targets {
    flex: 1;
    min-width: 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .dd-layout .dd-targets-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.drop-zone {
  min-height: 120px;
  min-width: 0;
  padding: 0.5rem;
  border-radius: 0.5rem;
  border: 2px solid var(--border);
  background: var(--surface2);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  overflow-x: hidden;
}

.drop-zone::before {
  content: attr(data-label);
  display: block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.25;
  color: var(--muted);
  margin-bottom: 0.15rem;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.chip {
  min-width: 0;
  max-width: 100%;
  padding: 0.5rem 0.6rem;
  border-radius: 0.4rem;
  background: var(--bg);
  border: 1px solid var(--border);
  cursor: grab;
  font-size: 0.8rem;
  line-height: 1.35;
  overflow-wrap: anywhere;
  word-break: break-word;
  user-select: none;
  touch-action: none;
}

.chip:active {
  cursor: grabbing;
}

.chip strong {
  display: block;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  margin-bottom: 0.15rem;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.chip span {
  display: block;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.chip-enter {
  opacity: 0;
  transform: translate3d(0, 10px, 0);
  animation: chip-enter 420ms cubic-bezier(0.2, 0.9, 0.24, 1) forwards;
  will-change: transform, opacity;
}

@keyframes chip-enter {
  0% {
    opacity: 0;
    transform: translate3d(0, 10px, 0);
  }
  70% {
    opacity: 1;
    transform: translate3d(0, -1px, 0);
  }
  100% {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-6px);
  }
  75% {
    transform: translateX(6px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .chip-enter {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

/* --- Code review (spot the risks) -------------------------------------- */
.chat {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.chat-msg {
  padding: 0.75rem 0.9rem;
  border-radius: 0.55rem;
  border: 1px solid var(--border);
}

.chat-user {
  background: var(--surface2);
  align-self: flex-end;
  max-width: 85%;
}

.chat-ai {
  background: var(--bg);
}

.chat-role {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.chat-msg p {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
}

.chat-msg p:last-child {
  margin-bottom: 0;
}

.code-block {
  list-style: none;
  counter-reset: codeline;
  margin: 0.5rem 0;
  padding: 0.6rem 0.6rem 0.6rem 0;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  overflow-x: auto;
}

.code-line {
  counter-increment: codeline;
  display: flex;
  gap: 0.75rem;
  padding: 0.05rem 0.6rem 0.05rem 0;
  border-left: 3px solid transparent;
  white-space: pre;
}

.code-line::before {
  content: counter(codeline);
  flex: 0 0 2.2rem;
  text-align: right;
  color: var(--muted);
  opacity: 0.6;
  user-select: none;
}

.code-line code {
  font-family: inherit;
  color: var(--text);
}

.code-line.code-blank {
  min-height: 0.9rem;
}

.code-line.selectable {
  cursor: pointer;
  border-radius: 0 0.25rem 0.25rem 0;
  transition: background 0.12s ease;
}

.code-line.selectable:hover:not(.locked) {
  background: var(--accent-soft);
}

.code-line.selectable:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.code-line.selected {
  background: var(--code-selected-bg);
  border-left-color: var(--danger);
}

.code-line.selected code {
  color: var(--code-selected-fg);
}

.code-line.locked {
  cursor: default;
  pointer-events: none;
}

.code-caption {
  margin: 0.4rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

/* --- Verification ------------------------------------------------------ */
.actions {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.actions-inline {
  margin-top: 1.25rem;
}

.flag-box {
  margin: 1.25rem 0;
  padding: 1rem;
  border-radius: 0.5rem;
  background: var(--surface2);
  border: 1px solid var(--border);
}

.flag-box h3 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
}

.flag-value {
  display: block;
  word-break: break-all;
  padding: 0.5rem;
  background: var(--bg);
  border-radius: 0.35rem;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.verify-status {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.verify-status.err {
  color: var(--danger);
}

.verify-status.ok {
  color: var(--ok);
}

/* --- Wrong-answer hint toast ------------------------------------------- */
.hint-toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  z-index: 300;
  width: min(440px, calc(100vw - 2rem));
  transform: translate(-50%, 1.5rem);
  opacity: 0;
  padding: 0.95rem 1.15rem;
  background: var(--surface2);
  border: 1px solid var(--warn);
  border-left: 4px solid var(--warn);
  border-radius: 0.6rem;
  box-shadow: 0 18px 50px var(--shadow);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.hint-toast[hidden] {
  display: none;
}

.hint-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.hint-toast-title {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--warn);
}

.hint-toast-msg {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text);
}

/* --- Full-screen rubber-stamp moment after successful verify ----------- */
.approved-stamp-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  background: radial-gradient(
    circle at 50% 45%,
    rgba(255, 255, 255, 0.14) 0%,
    transparent 55%
  );
}

.approved-stamp-overlay[hidden] {
  display: none !important;
}

.approved-stamp-inner {
  position: relative;
  padding: clamp(1.25rem, 4vw, 2.25rem) clamp(1.75rem, 6vw, 3.5rem);
  border: clamp(6px, 1.2vw, 10px) double #2f9e57;
  border-radius: 0.2rem;
  background: rgba(244, 255, 248, 0.97);
  box-shadow:
    0 0 0 3px rgba(47, 158, 87, 0.35),
    0 0 60px rgba(47, 158, 87, 0.4),
    0 24px 80px rgba(0, 0, 0, 0.35);
  opacity: 0;
  transform: scale(2.4) rotate(-14deg);
  filter: drop-shadow(0 12px 40px rgba(0, 0, 0, 0.4));
}

.approved-stamp-inner.stamp-in {
  animation: approved-stamp-thump 0.58s cubic-bezier(0.32, 1.65, 0.45, 1) forwards;
}

@keyframes approved-stamp-thump {
  0% {
    opacity: 0;
    transform: scale(2.4) rotate(-14deg);
  }
  45% {
    opacity: 1;
    transform: scale(0.88) rotate(-4deg);
  }
  68% {
    transform: scale(1.08) rotate(-6deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(-5deg);
  }
}

.approved-stamp-inner.stamp-ready {
  opacity: 1;
  transform: scale(1) rotate(-5deg);
}

.approved-stamp-overlay.is-fading .approved-stamp-inner {
  transition: opacity 3s ease-in;
  opacity: 0;
}

.approved-stamp-text {
  display: block;
  font-size: clamp(2.75rem, 14vw, 6.5rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #2f9e57;
  text-shadow:
    0 0 1px rgba(255, 255, 255, 0.9),
    0 2px 0 rgba(0, 0, 0, 0.08);
  -webkit-text-stroke: 1px rgba(47, 158, 87, 0.25);
}

/* --- Completion modal -------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: var(--overlay);
  backdrop-filter: blur(3px);
  animation: modal-fade 0.25s ease;
}

.modal-overlay[hidden] {
  display: none !important;
}

@keyframes modal-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal-card {
  position: relative;
  z-index: 1;
  width: min(460px, 100%);
  padding: 1.75rem;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 4px solid var(--ok);
  border-radius: 0.75rem;
  box-shadow: 0 24px 80px var(--shadow);
  animation: modal-pop 0.3s cubic-bezier(0.32, 1.5, 0.5, 1);
}

@keyframes modal-pop {
  from { opacity: 0; transform: translateY(12px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-check {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--bg);
  background: var(--ok);
  border-radius: 50%;
}

.modal-card h2 {
  margin: 0 0 0.6rem;
  font-size: 1.3rem;
}

.modal-lead {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.modal-flag {
  margin-bottom: 0.9rem;
  padding: 0.85rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
}

.modal-note {
  margin: 0 0 1.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* --- Combined hub ------------------------------------------------------ */
.home-link {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  text-decoration: none;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-left: auto;
}

.lang-toggle {
  display: inline-flex;
  flex-shrink: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface2);
}

.lang-toggle-opt {
  padding: 0.28rem 0.72rem;
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.2;
  text-decoration: none;
  color: var(--muted);
}

.lang-toggle-opt.is-active {
  color: var(--on-accent);
  background: var(--accent);
}

.theme-toggle {
  display: inline-flex;
  flex-shrink: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface2);
}

.theme-toggle-opt {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.05rem;
  height: 1.85rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.theme-toggle-input {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.theme-toggle-opt:has(:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  z-index: 1;
}

.theme-toggle-opt.is-active,
.theme-toggle-opt:has(:checked) {
  color: var(--on-accent);
  background: var(--accent);
}

.theme-toggle-opt:not(.is-active):hover {
  color: var(--text);
  background: var(--surface);
}

.theme-icon {
  display: block;
  width: 0.95rem;
  height: 0.95rem;
  pointer-events: none;
}

.lang-toggle-opt:not(.is-active):hover {
  color: var(--text);
  background: var(--surface);
}

.hub {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3.5rem;
}

.hub-lead {
  margin: 0 0 0.35rem;
  max-width: 40rem;
  color: var(--muted);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.course-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 1.25rem 1.35rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.course-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px var(--shadow);
}

.course-num {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.course-card h2 {
  margin: 0.4rem 0 0.45rem;
  font-size: 1.15rem;
}

.course-card p {
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.course-card ul {
  margin: auto 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.course-card li + li {
  margin-top: 0.2rem;
}

.gate {
  display: flex;
  justify-content: center;
  padding: 2.5rem 1.5rem 4rem;
}

.gate-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  width: min(26rem, 100%);
  padding: 1.5rem 1.5rem 1.65rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
}

.gate-card h2 {
  margin: 0;
  font-size: 1.2rem;
}

.gate-card .hub-lead {
  margin: 0;
}

.gate-label {
  margin-top: 0.35rem;
  font-size: 0.82rem;
  font-weight: 600;
}

.gate-input {
  width: 100%;
  min-height: 2.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
}

.gate-input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

.gate-card .btn {
  margin-top: 0.5rem;
  align-self: flex-start;
}

.gate-error {
  margin: 0;
  color: var(--danger);
  font-weight: 600;
  font-size: 0.9rem;
}