:root {
  --settings-primary: #6366f1;
  --settings-primary-dark: #4f46e5;
  --settings-secondary: #a855f7;
  --settings-bg: linear-gradient(135deg, #eef2ff 0%, #f5f3ff 55%, #ede9fe 100%);
  --settings-panel-bg: rgba(255, 255, 255, 0.95);
  --settings-border: rgba(99, 102, 241, 0.16);
  --settings-text: #1e1b4b;
  --settings-muted: #5b21b6;
  --settings-shadow: 0 28px 60px rgba(79, 70, 229, 0.16);
}

body.settings-body {
  font-family: "Inter", "Segoe UI", sans-serif;
  background: var(--settings-bg);
  color: var(--settings-text);
  min-height: 100vh;
  margin: 0;
}

.settings-main {
  padding: 6rem 1.5rem 5rem;
}

.settings-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.settings-hero {
  background: var(--settings-panel-bg);
  border-radius: 28px;
  padding: clamp(2rem, 4vw, 3rem);
  box-shadow: var(--settings-shadow);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 2.5rem;
  align-items: center;
}

.settings-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 2.8rem);
  background: linear-gradient(
    120deg,
    var(--settings-primary),
    var(--settings-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.settings-hero p {
  margin: 0;
  color: rgba(30, 27, 75, 0.75);
  max-width: 540px;
  line-height: 1.6;
}

.settings-hero .meta-card {
  background: linear-gradient(
    160deg,
    rgba(99, 102, 241, 0.12),
    rgba(168, 85, 247, 0.18)
  );
  border-radius: 20px;
  padding: 1.5rem;
  display: grid;
  gap: 0.5rem;
  color: var(--settings-text);
}

.settings-hero .meta-card span {
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(91, 33, 182, 0.8);
}

.settings-hero .meta-card strong {
  font-size: 1.25rem;
}

.settings-status {
  display: none;
  border-radius: 16px;
  padding: 1rem 1.25rem;
  background: rgba(99, 102, 241, 0.12);
  color: var(--settings-primary-dark);
  border: 1px solid rgba(99, 102, 241, 0.28);
}

.settings-status[data-state="visible"] {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.settings-status[data-variant="error"] {
  background: rgba(239, 68, 68, 0.12);
  color: #b91c1c;
  border-color: rgba(239, 68, 68, 0.35);
}

.settings-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 2rem;
}

.settings-nav {
  background: var(--settings-panel-bg);
  border-radius: 24px;
  box-shadow: var(--settings-shadow);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  position: sticky;
  top: 110px;
  height: fit-content;
}

.settings-nav h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 0.75rem;
  color: rgba(30, 27, 75, 0.6);
}

.settings-nav .nav-link {
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  padding: 0.85rem 1rem;
  border-radius: 14px;
  font-weight: 600;
  color: rgba(30, 27, 75, 0.75);
  cursor: pointer;
  transition:
    background 0.2s ease,
    transform 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.settings-nav .nav-link svg {
  width: 20px;
  height: 20px;
  color: var(--settings-primary);
}

.settings-nav .nav-link.active {
  background: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.18),
    rgba(168, 85, 247, 0.24)
  );
  color: var(--settings-text);
  transform: translateX(4px);
}

.settings-nav .nav-footnote {
  background: rgba(99, 102, 241, 0.12);
  border-radius: 16px;
  padding: 1.25rem 1.1rem;
  color: rgba(30, 27, 75, 0.8);
}

.settings-nav .nav-footnote h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.settings-nav .nav-footnote p {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  line-height: 1.5;
}

.settings-nav .nav-footnote .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 999px;
  border: 1px solid rgba(99, 102, 241, 0.35);
  padding: 0.5rem 1.25rem;
  background: white;
  color: var(--settings-primary);
  font-weight: 600;
  text-decoration: none;
}

.settings-panels {
  display: grid;
  gap: 1.75rem;
}

.settings-card {
  background: var(--settings-panel-bg);
  border-radius: 28px;
  padding: clamp(1.75rem, 2.5vw, 2.5rem);
  box-shadow: var(--settings-shadow);
  border: 1px solid var(--settings-border);
  display: none;
}

.settings-card.active {
  display: block;
}

.settings-card header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.settings-card header h2 {
  margin: 0;
  font-size: 1.5rem;
}

.settings-card header p {
  margin: 0;
  color: rgba(30, 27, 75, 0.6);
}

.settings-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-radius: 18px;
  border: 1px solid rgba(99, 102, 241, 0.12);
  background: rgba(99, 102, 241, 0.05);
  margin-bottom: 1rem;
  gap: 1.5rem;
}

.settings-option .option-text h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.settings-option .option-text p {
  margin: 0;
  color: rgba(30, 27, 75, 0.6);
  font-size: 0.9rem;
}

.switch {
  position: relative;
  width: 54px;
  height: 30px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: rgba(99, 102, 241, 0.25);
  border-radius: 999px;
  transition: background 0.3s ease;
}

.slider::before {
  position: absolute;
  content: "";
  height: 24px;
  width: 24px;
  left: 3px;
  top: 3px;
  background-color: white;
  border-radius: 50%;
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.25);
  transition: transform 0.3s ease;
}

.switch input:checked + .slider {
  background: linear-gradient(
    135deg,
    var(--settings-primary),
    var(--settings-secondary)
  );
}

.switch input:checked + .slider::before {
  transform: translateX(24px);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.form-grid .field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-grid label {
  font-weight: 600;
  font-size: 0.95rem;
  color: rgba(30, 27, 75, 0.75);
}

.form-grid select,
.form-grid input[type="time"] {
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--settings-text);
  background: rgba(255, 255, 255, 0.9);
  transition:
    border 0.2s ease,
    box-shadow 0.2s ease;
}

.form-grid select:focus,
.form-grid input[type="time"]:focus {
  outline: none;
  border-color: var(--settings-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.settings-actions {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.settings-actions .btn-primary {
  background: linear-gradient(
    135deg,
    var(--settings-primary),
    var(--settings-secondary)
  );
  color: white;
  border: none;
  padding: 0.75rem 1.75rem;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.settings-actions .btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 30px rgba(99, 102, 241, 0.25);
}

.settings-actions .btn-secondary {
  background: transparent;
  color: var(--settings-primary);
  border: 1px solid rgba(99, 102, 241, 0.3);
  padding: 0.75rem 1.75rem;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
}

.settings-divider {
  margin: 2rem 0 1.5rem;
  height: 1px;
  background: rgba(99, 102, 241, 0.12);
}

.focus-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.focus-chip {
  padding: 0.9rem 1rem;
  border-radius: 16px;
  background: rgba(99, 102, 241, 0.12);
  font-weight: 600;
  color: rgba(30, 27, 75, 0.75);
}

@media (max-width: 1100px) {
  .settings-hero {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 960px) {
  .settings-layout {
    grid-template-columns: 1fr;
  }
  .settings-nav {
    position: static;
  }
}

@media (max-width: 640px) {
  .settings-main {
    padding: 5.5rem 1rem 3.5rem;
  }
  .settings-card {
    border-radius: 22px;
    padding: 1.5rem;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .settings-option {
    flex-direction: column;
    align-items: flex-start;
  }
  .settings-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .settings-actions .btn-primary,
  .settings-actions .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}