/* ==========================================================================
   OgbonMath — Settings & Profile page
   --------------------------------------------------------------------------
   Editorial layout matching the home page, textbook About panels, and
   User Guide. Hero + sectioned cards (Account, Profile, Progress,
   Mastery roadmap, Appearance, Data). Single OgbonMath orange accent
   throughout. The function in app.js emits semantic class-based markup;
   no inline styles, no !important workarounds.
   ========================================================================== */

.settings {
  max-width: 920px;
  margin: 0 auto;
  padding: 56px 40px 64px;
  display: flex;
  flex-direction: column;
  gap: 56px;
  font-family: var(--font-sans);
}

@media (max-width: 768px) {
  .settings {
    padding: 32px 20px 48px;
    gap: 40px;
  }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.settings-hero {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  max-width: 720px;
}

.settings-hero-eyebrow {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: var(--fw-bold, 700);
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--ac);
  margin-bottom: 18px;
}

.settings-hero-tagline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 36px);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.018em;
  line-height: 1.18;
  color: var(--tx);
  margin: 0 0 22px;
  max-width: 24ch;
}

.settings-hero-body {
  font-size: 16px;
  line-height: 1.65;
  color: var(--tx2);
  margin: 0;
  max-width: 60ch;
}

@media (max-width: 768px) {
  .settings-hero-tagline { font-size: clamp(22px, 5.4vw, 26px); }
}

/* ==========================================================================
   Section header (Account / Profile / Progress / Mastery / etc.)
   ========================================================================== */
.settings-section {
  display: flex;
  flex-direction: column;
}

.settings-section-header {
  margin-bottom: 22px;
}

.settings-section-eyebrow {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: var(--fw-bold, 700);
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--tx3);
}

.settings-section-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: var(--fw-semibold);
  letter-spacing: -0.012em;
  color: var(--tx);
  margin: 6px 0 0;
  line-height: 1.25;
}

@media (max-width: 768px) {
  .settings-section-title { font-size: 19px; }
}

/* ==========================================================================
   Card — base container
   ========================================================================== */
.settings-card {
  background: var(--bg2);
  border: 1px solid var(--bdr);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
}

.settings-card-body {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--tx2);
  margin: 0 0 18px;
}

.settings-card-body:last-child {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .settings-card { padding: 22px 20px; }
}

/* ==========================================================================
   Account section
   ========================================================================== */
.settings-account-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.settings-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2px solid var(--ac);
  object-fit: cover;
  flex-shrink: 0;
}

.settings-avatar-placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg3);
  color: var(--ac);
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: var(--fw-semibold);
}

.settings-account-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.settings-account-name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: var(--fw-semibold);
  color: var(--tx);
  letter-spacing: -0.01em;
}

.settings-account-email {
  font-size: 13px;
  color: var(--tx3);
  font-family: var(--font-mono, monospace);
  word-break: break-all;
}

.settings-sync-status {
  font-size: 13px;
  color: var(--tx3);
  margin-bottom: 18px;
  font-family: var(--font-mono, monospace);
}

/* ==========================================================================
   Notes — positive / warning callouts
   ========================================================================== */
.settings-note {
  font-size: 13px;
  line-height: 1.55;
  margin: 18px 0 0;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border-left: 3px solid;
}

.settings-note-positive {
  color: var(--tx2);
  background: var(--ac-soft);
  border-left-color: var(--ac);
}

.settings-note-warning {
  color: var(--tx2);
  background: var(--bg3);
  border-left-color: var(--tx3);
}

/* ==========================================================================
   Form fields (Profile section)
   ========================================================================== */
.settings-field {
  margin-bottom: 18px;
}

.settings-field:last-child {
  margin-bottom: 0;
}

.settings-field-label {
  display: block;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: var(--fw-bold, 700);
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--tx3);
  margin-bottom: 8px;
}

.settings-input {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg);
  color: var(--tx);
  border: 1px solid var(--bdr);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.45;
  box-sizing: border-box;
  transition: border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}

.settings-input:focus {
  outline: none;
  border-color: var(--ac);
  box-shadow: 0 0 0 3px var(--ac-ring);
}

.settings-textarea {
  resize: vertical;
  min-height: 80px;
  font-family: var(--font-sans);
}

select.settings-input {
  cursor: pointer;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.settings-actions-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.settings-actions-row:first-child {
  margin-top: 0;
}

.settings-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: var(--fw-bold, 700);
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}

.settings-btn:focus-visible {
  outline: 3px solid var(--ac-ring);
  outline-offset: 2px;
}

.settings-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.settings-btn-primary {
  background: var(--ac);
  color: var(--ac-tx);
}

.settings-btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px var(--ac-ring);
}

.settings-btn-ghost {
  background: transparent;
  color: var(--tx);
  border: 1px solid var(--bdr);
}

.settings-btn-ghost:hover:not(:disabled) {
  border-color: var(--ac);
  color: var(--ac);
}

.settings-btn-danger {
  background: transparent;
  color: var(--tx2);
  border: 1px solid var(--bdr);
}

.settings-btn-danger:hover:not(:disabled) {
  border-color: var(--rd, #d04545);
  color: var(--rd, #d04545);
}

.settings-saved-flag {
  display: none;
  font-size: 13px;
  color: var(--ac);
  font-weight: var(--fw-semibold);
}

.settings-saved-flag.is-visible {
  display: inline;
}

/* ==========================================================================
   Stats grid (matches home page achievement cards)
   ========================================================================== */
.settings-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

@media (max-width: 768px) {
  .settings-stats-grid { grid-template-columns: repeat(2, 1fr); }
}

.settings-stat-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 22px 24px;
  background: var(--bg2);
  border: 1px solid var(--bdr);
  border-radius: var(--radius-lg);
  transition: border-color var(--dur-fast) var(--ease-out);
}

.settings-stat-card:hover {
  border-color: var(--ac);
}

.settings-stat-value {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: var(--fw-semibold);
  letter-spacing: -0.012em;
  color: var(--tx);
  line-height: 1;
  margin-bottom: 8px;
}

.settings-stat-label {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: var(--fw-medium);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--tx3);
}

@media (max-width: 768px) {
  .settings-stat-card { padding: 18px 20px; }
  .settings-stat-value { font-size: 22px; }
}

/* ==========================================================================
   Mastery roadmap
   ========================================================================== */
.settings-roadmap {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.settings-roadmap-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
}

.settings-roadmap-row.is-current {
  background: var(--ac-soft);
  border-color: var(--ac);
}

.settings-roadmap-row.is-reached {
  background: transparent;
  opacity: 0.85;
}

.settings-roadmap-row.is-locked {
  opacity: 0.5;
}

.settings-roadmap-marker {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-family: var(--font-mono, monospace);
  font-size: 13px;
  font-weight: var(--fw-bold, 700);
  background: var(--bg3);
  color: var(--tx3);
  border: 1px solid var(--bdr);
}

.settings-roadmap-row.is-current .settings-roadmap-marker {
  background: var(--ac);
  color: var(--ac-tx);
  border-color: var(--ac);
}

.settings-roadmap-row.is-reached .settings-roadmap-marker {
  background: var(--bg3);
  color: var(--ac);
  border-color: var(--ac);
}

.settings-roadmap-info {
  flex: 1;
  min-width: 0;
}

.settings-roadmap-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
}

.settings-roadmap-name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: var(--fw-semibold);
  color: var(--tx);
}

.settings-roadmap-row.is-locked .settings-roadmap-name {
  color: var(--tx3);
}

.settings-roadmap-xp {
  font-family: var(--font-mono, monospace);
  font-size: 11px;
  color: var(--tx3);
  font-weight: var(--fw-semibold, 600);
}

.settings-roadmap-bar {
  height: 4px;
  background: var(--bg3);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 6px;
}

.settings-roadmap-bar-fill {
  height: 100%;
  background: var(--ac);
  transition: width var(--dur) var(--ease-out);
}

.settings-roadmap-meta {
  font-size: 11px;
  color: var(--tx3);
  margin-top: 6px;
  font-family: var(--font-mono, monospace);
  letter-spacing: 0.2px;
}

.settings-roadmap-row.is-current .settings-roadmap-meta {
  color: var(--ac);
}

/* ==========================================================================
   Row card (Appearance / single-row controls)
   ========================================================================== */
.settings-row-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.settings-row-label {
  font-family: var(--font-sans);
  font-size: 14.5px;
  color: var(--tx);
  font-weight: var(--fw-medium);
}

/* Page-level tweaks */
body[data-view="settings"] #ct {
  padding-top: 0;
}