/* ─── Reset & base ─────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --clr-bg:         #EEF2FF;
  --clr-card:       #FFFFFF;
  --clr-primary:    #2563EB;
  --clr-primary-h:  #1D4ED8;
  --clr-on-primary: #FFFFFF;
  --clr-success:    #10B981;
  --clr-success-bg: #ECFDF5;
  --clr-text:       #1E293B;
  --clr-muted:      #64748B;
  --clr-border:     #E2E8F0;
  --clr-inset:      #F8FAFF;
  --clr-hover:      #F0F4FF;
  --clr-toggle-off: #CBD5E1;
  --clr-toggle-knob:#FFFFFF;
  --radius:         12px;
  --shadow:         0 4px 28px rgba(37, 99, 235, 0.10);
}

@media (prefers-color-scheme: dark) {
  :root {
    --clr-bg:         #0F172A;
    --clr-card:       #1E293B;
    --clr-primary:    #3B82F6;
    --clr-primary-h:  #60A5FA;
    --clr-on-primary: #FFFFFF;
    --clr-success:    #34D399;
    --clr-success-bg: #0C2A22;
    --clr-text:       #E2E8F0;
    --clr-muted:      #94A3B8;
    --clr-border:     #334155;
    --clr-inset:      #172033;
    --clr-hover:      #24334D;
    --clr-toggle-off: #475569;
    --clr-toggle-knob:#E2E8F0;
    --shadow:         0 4px 28px rgba(0, 0, 0, 0.45);
  }
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--clr-bg);
  color: var(--clr-text);
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

/* ─── Card ─────────────────────────────────────────────────────── */
main {
  width: 100%;
  max-width: 520px;
}

.card {
  background: var(--clr-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ─── Header ───────────────────────────────────────────────────── */
.card__header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--clr-text);
}

.card__header p {
  font-size: 0.875rem;
  color: var(--clr-muted);
  margin-top: 0.25rem;
}

/* ─── Password section ─────────────────────────────────────────── */
.password-section {
  display: flex;
  gap: 0.75rem;
  align-items: stretch;
}

.password-box {
  flex: 1;
  background: var(--clr-inset);
  border: 1.5px solid var(--clr-border);
  border-radius: 8px;
  padding: 0.875rem 1rem;
  font-size: 1rem;
  font-family: "Courier New", Courier, monospace;
  font-weight: 600;
  color: var(--clr-text);
  word-break: break-all;
  line-height: 1.6;
  min-height: 56px;
  display: flex;
  align-items: center;
}

.password-box.flash {
  animation: fadeSlideIn 0.3s ease-out;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0);   }
}

.password-placeholder {
  color: var(--clr-muted);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-weight: 400;
  font-size: 0.875rem;
}

/* ─── Buttons ──────────────────────────────────────────────────── */
.btn {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.1s;
}

.btn:active {
  transform: scale(0.97);
}

.btn:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 2px;
}

/* Copy button */
.btn--copy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.875rem;
  background: transparent;
  border: 1.5px solid var(--clr-border);
  color: var(--clr-muted);
  font-size: 0.875rem;
  white-space: nowrap;
  min-width: 98px;
}

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

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

.btn--copy svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.btn--copy.copied {
  border-color: var(--clr-success);
  color: var(--clr-success);
  background: var(--clr-success-bg);
}

/* Generate button */
.btn--generate {
  width: 100%;
  padding: 0.9rem;
  background: var(--clr-primary);
  color: var(--clr-on-primary);
  font-size: 1rem;
  letter-spacing: 0.01em;
}

.btn--generate:hover {
  background: var(--clr-primary-h);
}

/* ─── Strength ─────────────────────────────────────────────────── */
.strength-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.strength-bar {
  height: 6px;
  background: var(--clr-border);
  border-radius: 99px;
  overflow: hidden;
}

.strength-fill {
  height: 100%;
  border-radius: 99px;
  transition: width 0.4s ease, background 0.4s ease;
  width: 0%;
}

.strength-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.strength-label {
  font-size: 0.8125rem;
  font-weight: 600;
}

.strength-bits {
  font-size: 0.75rem;
  color: var(--clr-muted);
}

/* ─── Options ──────────────────────────────────────────────────── */
.options__title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--clr-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 0.75rem;
}

.options__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  padding: 0.75rem;
  border: 1.5px solid var(--clr-border);
  border-radius: 8px;
  transition: border-color 0.15s, background 0.15s;
}

.toggle-label:hover {
  border-color: var(--clr-primary);
  background: var(--clr-inset);
}

/* Visually hidden native checkbox */
.toggle-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  white-space: nowrap;
  clip: rect(0, 0, 0, 0);
}

/* Pill track */
.toggle-track {
  position: relative;
  width: 36px;
  height: 20px;
  background: var(--clr-toggle-off);
  border-radius: 99px;
  flex-shrink: 0;
  transition: background 0.2s;
}

.toggle-track::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--clr-toggle-knob);
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.toggle-input:checked ~ .toggle-track {
  background: var(--clr-primary);
}

.toggle-input:checked ~ .toggle-track::after {
  transform: translateX(16px);
}

.toggle-input:focus-visible ~ .toggle-track {
  outline: 2px solid var(--clr-primary);
  outline-offset: 2px;
}

.toggle-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.toggle-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clr-text);
  line-height: 1.3;
}

.toggle-desc {
  font-size: 0.75rem;
  color: var(--clr-muted);
}

/* ─── Footer ───────────────────────────────────────────────────── */
.card__footer {
  text-align: center;
  font-size: 0.75rem;
  color: var(--clr-muted);
  border-top: 1px solid var(--clr-border);
  padding-top: 0.75rem;
  min-height: 1.5rem;
}

/* ─── Om-seksjon (beskrivelse) ─────────────────────────────────── */
.about {
  border-top: 1px solid var(--clr-border);
  padding-top: 0.75rem;
}

.about > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--clr-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.about > summary::-webkit-details-marker {
  display: none;
}

.about > summary::after {
  content: "+";
  font-size: 1rem;
  line-height: 1;
  color: var(--clr-muted);
  transition: transform 0.2s;
}

.about[open] > summary::after {
  content: "–";
}

.about > summary:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

.about__body {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.about__body p {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--clr-muted);
}

.about__body strong {
  color: var(--clr-text);
  font-weight: 600;
}

/* ─── Tidsvelger (segmentert kontroll) ────────────────────────── */
.tense-group {
  display: flex;
  border: 1.5px solid var(--clr-border);
  border-radius: 8px;
  overflow: hidden;
}

.tense-option {
  flex: 1;
  position: relative;
}

.tense-option input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.tense-option span {
  display: block;
  text-align: center;
  padding: 0.5rem 0.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--clr-muted);
  cursor: pointer;
  border-right: 1.5px solid var(--clr-border);
  transition: background 0.15s, color 0.15s;
  line-height: 1.4;
}

.tense-option:last-child span {
  border-right: none;
}

.tense-option input[type="radio"]:checked + span {
  background: var(--clr-primary);
  color: var(--clr-on-primary);
}

.tense-option:not(:has(input:checked)):hover span {
  background: var(--clr-hover);
  color: var(--clr-primary);
}

.tense-option input[type="radio"]:focus-visible + span {
  outline: 2px solid var(--clr-primary);
  outline-offset: -2px;
}

/* ─── Responsiv ────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .card {
    padding: 1.5rem 1.25rem;
  }

  .options__grid {
    grid-template-columns: 1fr;
  }

  .password-section {
    flex-direction: column;
  }

  .btn--copy {
    width: 100%;
  }
}