/* iOS-like Settings (Inset Grouped) - Senior Level Design */

.settings-container {
  max-width: var(--max-width-md);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
  min-height: calc(100vh - 64px);
}

.settings-header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.ios-title {
  font-family: var(--font-family);
  font-size: var(--fs-large-title);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 0 0 var(--space-3) 0;
  line-height: var(--line-height-tight);
}

.ios-subtitle {
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--fs-headline);
  line-height: var(--line-height-relaxed);
  font-weight: 400;
}

.ios-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.ios-section {
  background: var(--card-bg);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.ios-section-title {
  font-size: var(--fs-caption-1);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-quaternary);
  margin: 0;
  padding: var(--space-5) var(--space-6) var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--separator-color);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ios-bg: #000;
    --ios-card: rgba(28,28,30,0.72);
    --ios-sep: rgba(84,84,88,0.55);
    --ios-sep-strong: rgba(84,84,88,0.75);
    --ios-text: rgba(255,255,255,0.92);
    --ios-subtext: rgba(235,235,245,0.62);
    --ios-tertiary: rgba(235,235,245,0.35);
    --ios-shadow: none;
  }
}

/* Container / page */
.ios-settings {
  max-width: 720px;
  margin: 0 auto;
  padding:
    calc(18px + env(safe-area-inset-top))
    calc(16px + env(safe-area-inset-right))
    calc(24px + env(safe-area-inset-bottom))
    calc(16px + env(safe-area-inset-left));
}

.settings-header {
  text-align: left;
  margin-bottom: 14px;
}

.ios-title {
  font-family: -apple-system, system-ui, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: rgba(0, 0, 0, 0.92);
  margin: 0 0 6px 0;
}

.ios-subtitle {
  margin: 0;
  color: rgba(60, 60, 67, 0.72);
  font-size: 14px;
  line-height: 1.35;
}

/* Sections */
.ios-content {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ios-section {
  background: rgba(255, 255, 255, 0.8);
  border-radius: 14px;
  border: 1px solid rgba(60, 60, 67, 0.18);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  padding: 0;
  backdrop-filter: saturate(180%) blur(18px);
}

.ios-section-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: rgba(60, 60, 67, 0.72);
  margin: 0;
  padding: 14px 16px 10px 16px;
  border-bottom: 1px solid rgba(60, 60, 67, 0.18);
}

/* Setting Items */
.ios-setting-item {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--separator-color);
  transition: background-color var(--ms-duration-fast) var(--curve-spring);
  cursor: pointer;
}

.ios-setting-item:last-child {
  border-bottom: none;
}

.ios-setting-item:hover {
  background: var(--bg-secondary);
}

.ios-setting-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1;
}

.ios-setting-label {
  font-size: var(--fs-body);
  font-weight: 400;
  color: var(--text-primary);
  margin: 0;
  line-height: var(--line-height-tight);
}

.ios-setting-description {
  font-size: var(--fs-caption-1);
  color: var(--text-tertiary);
  margin: 0;
  line-height: var(--line-height-relaxed);
}

/* Controls */
.setting-control {
  position: relative;
  display: flex;
  align-items: center;
}

.setting-select {
  appearance: none;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: var(--space-3) var(--space-8) var(--space-3) var(--space-4);
  font-size: var(--fs-body);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--ms-duration-fast) var(--curve-spring);
  min-width: 120px;
}

.setting-select:focus {
  outline: none;
  border-color: var(--apple-blue);
  box-shadow: var(--focus-ring);
}

.setting-select:hover {
  border-color: var(--apple-blue);
}

.setting-toggle {
  position: relative;
  width: 44px;
  height: 28px;
  background: var(--border-color);
  border-radius: 14px;
  cursor: pointer;
  transition: all var(--ms-duration-fast) var(--curve-spring);
}

.setting-toggle.active {
  background: var(--apple-blue);
}

.setting-toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  background: white;
  border-radius: 50%;
  transition: transform var(--ms-duration-fast) var(--curve-spring);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.setting-toggle.active::after {
  transform: translateX(16px);
}

/* Danger Button */
.btn-danger {
  background: var(--danger-color);
  color: white;
  border: none;
  padding: var(--space-3) var(--space-5);
  border-radius: 10px;
  font-size: var(--fs-body);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--ms-duration-fast) var(--curve-spring);
}

.btn-danger:hover {
  background: #e53935;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-danger:active {
  transform: translateY(0);
}

.ios-setting-item:last-child {
  border-bottom: none;
}

.ios-setting-info {
  flex: 1;
  min-width: 0;
  margin-right: 0;
}

.ios-setting-label {
  display: block;
  color: rgba(0, 0, 0, 0.92);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.2;
  margin: 0 0 3px 0;
}

.ios-setting-description {
  margin: 0;
  color: rgba(60, 60, 67, 0.72);
  font-size: 13px;
  line-height: 1.3;
}

.ios-setting-control {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

/* Toggle: iOS-like */
.toggle {
  width: 51px;
  height: 31px;
}
.toggle-slider {
  border-radius: 999px;
  background-color: rgba(120,120,128,0.18);
}
.toggle-slider:before {
  width: 27px;
  height: 27px;
  left: 2px;
  bottom: 2px;
}
.toggle input:checked + .toggle-slider {
  background-color: var(--ios-blue);
}
.toggle input:checked + .toggle-slider:before {
  transform: translateX(20px);
}

/* Select */
.setting-select {
  min-width: 160px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--ios-sep-strong);
  background: rgba(120,120,128,0.12);
  color: var(--ios-text);
  padding: 0 12px;
  font-size: 14px;
}

/* Actions */
.ios-actions {
  margin-top: 14px;
  padding-top: 0;
  border-top: none;
  display: block;
}

.ios-btn-secondary {
  width: 100%;
  height: 48px;
  border-radius: 12px;
  border: 1px solid rgba(142, 142, 147, 0.3);
  background: rgba(142, 142, 147, 0.08);
  color: rgba(0, 0, 0, 0.92);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.ios-btn-secondary:hover {
  background: rgba(142, 142, 147, 0.15);
}

.ios-btn-secondary:active {
  transform: scale(0.98);
}

/* Advanced PIN reset – senior/iOS */
.ios-pin-reset {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: nowrap;
}

.ios-pin-digit {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  border: 1px solid rgba(142, 142, 147, 0.3);
  background: rgba(142, 142, 147, 0.08);
  color: rgba(0, 0, 0, 0.92);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.06s ease;
}

.ios-pin-digit:focus {
  outline: none;
  border-color: rgba(0, 122, 255, 0.8);
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.18);
}

.ios-btn-danger {
  height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 59, 48, 0.35);
  background: rgba(255, 59, 48, 0.12);
  color: #ff3b30;
  font-weight: 700;
  opacity: 0.55;
  pointer-events: none;
  cursor: not-allowed;
}

.ios-btn-danger:not(:disabled) {
  opacity: 1;
  pointer-events: auto;
  cursor: pointer;
  background: rgba(255, 59, 48, 0.18);
}

.ios-btn-danger:not(:disabled):hover {
  background: rgba(255, 59, 48, 0.25);
}

.ios-btn-danger:not(:disabled):active {
  transform: scale(0.98);
}

.ios-danger-note {
  margin: 10px 0 0 0;
  color: rgba(60, 60, 67, 0.36);
  font-size: 12.5px;
  line-height: 1.35;
}

/* Mobile / narrow */
@media (max-width: 520px) {
  .ios-title { font-size: 24px; }

  .ios-setting-item {
    align-items: flex-start;
    flex-direction: column;
  }

  .ios-setting-control {
    width: 100%;
    justify-content: flex-start;
  }

  .setting-select {
    width: 100%;
    min-width: 0;
  }

  .ios-pin-reset {
    width: 100%;
    flex-wrap: wrap;
  }

  .ios-btn-danger {
    width: 100%;
    margin-top: 8px;
  }
}