/* =========================
   qrcgen.com – COMPONENTS
   Ported from 301-ui design system
   ========================= */

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-main);
  font-family: var(--font-sans);
}

a {
  color: inherit;
}

[hidden] {
  display: none !important;
}

/* =========================
   Icons
   ========================= */

.icon {
  width: 1em;
  height: 1em;
  flex: 0 0 1em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* SVG <use> icons inherit text color */
.icon use {
  fill: currentColor;
}

.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;
}

/* =========================
   Typography
   ========================= */

.text-display {
  font-size: clamp(2rem, 3.2vw, 3rem);
  line-height: 1.1;
  font-weight: var(--fw-bold);
  margin: 0;
}

.text-title {
  font-size: var(--fs-xl);
  line-height: 1.25;
  font-weight: var(--fw-semibold);
  margin: 0 0 var(--space-2);
}

.text-body {
  font-size: var(--fs-md);
  line-height: 1.6;
  color: var(--text-main);
  margin: 0;
}

.text-lead {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0 0 var(--space-3);
}

.text-sm {
  font-size: var(--fs-sm);
}

.muted,
.text-muted {
  color: var(--text-muted);
}

.text-ok { color: var(--ok); }
.text-danger { color: var(--danger); }

/* =========================
   Unified Control Recipe
   ========================= */

.btn {
  font-size: var(--fs-control);
  line-height: var(--lh-control);
  padding-block: var(--control-pad-y);
  padding-inline: var(--control-pad-x);
  min-height: var(--control-min-height);
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  white-space: nowrap;
  justify-content: center;
  border-width: var(--border-1);
  border-style: solid;
  border-color: transparent;
  border-radius: var(--r-pill);
  font-weight: var(--fw-medium);
  text-decoration: none;
  color: inherit;
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-md);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

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

.btn--sm {
  font-size: calc(var(--fs-control) * var(--control-scale-sm));
  padding-block: calc(var(--control-pad-y) * var(--control-scale-sm));
  padding-inline: calc(var(--control-pad-x) * var(--control-scale-sm));
  min-height: calc(var(--control-min-height) * var(--control-scale-sm));
}

.btn--lg {
  font-size: calc(var(--fs-control) * 1.05);
  padding-block: calc(var(--control-pad-y) * var(--control-scale-lg));
  padding-inline: calc(var(--control-pad-x) * var(--control-scale-lg));
  min-height: calc(var(--control-min-height) * var(--control-scale-lg));
}

.btn--primary {
  background: var(--primary);
  color: var(--btn-text-on-dark);
}

.btn--primary:hover {
  background: var(--primary-hover);
  border-color: color-mix(in srgb, var(--primary) 35%, transparent);
}

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

.btn--ghost:hover {
  background: var(--panel);
  border-color: var(--border-strong);
  color: var(--text-main);
}

.btn--danger {
  background: var(--danger);
  color: var(--btn-text-on-dark);
  border-color: color-mix(in srgb, var(--danger) 40%, transparent);
}

.btn--danger:hover {
  background: color-mix(in srgb, var(--danger) 88%, #000 6%);
}

.btn-link {
  background: transparent;
  border: none;
  color: var(--primary);
  padding: 0;
  height: auto;
  min-height: auto;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.btn-link:hover {
  color: var(--primary-hover);
}

/* Icon-only button (from 301-ui) */
.btn-icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: calc(1em + 1.25rem);
  height: calc(1em + 1.25rem);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--text-main);
  cursor: pointer;
  text-decoration: none;
  line-height: 1;
  transition: all var(--transition-md);
}

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

.btn-icon .icon {
  width: 1.1em;
  height: 1.1em;
}

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

.btn-icon--ghost:hover {
  background: color-mix(in srgb, var(--text-main) 8%, transparent);
  color: var(--text-main);
}

/* =========================
   Forms / Inputs
   ========================= */

.input,
.select,
.textarea {
  border-radius: var(--r-field);
}

.input {
  font-size: var(--fs-control);
  line-height: var(--lh-control);
  padding-block: var(--control-pad-y);
  padding-inline: var(--control-pad-x);
  min-height: var(--control-min-height);
  border: var(--border-1) solid var(--input-border);
  background: var(--panel);
  color: var(--text-main);
  -webkit-appearance: none;
  appearance: none;
  transition:
    border-color var(--transition-md),
    box-shadow var(--transition-md),
    background var(--transition-md);
}

.input:focus-visible,
.textarea:focus-visible {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--brand), transparent 80%);
}

.input.is-error,
.textarea.is-error {
  border-color: var(--danger);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--danger), transparent 85%);
}

.input::placeholder,
.textarea::placeholder {
  color: var(--text-subtle);
  opacity: 0.9;
}

.textarea {
  font-size: var(--fs-control);
  line-height: var(--lh-control);
  padding-block: var(--control-pad-y);
  padding-inline: var(--control-pad-x);
  border: var(--border-1) solid var(--input-border);
  background: var(--panel);
  color: var(--text-main);
  -webkit-appearance: none;
  appearance: none;
  resize: vertical;
  min-height: calc(3 * 1em * var(--lh-control) + 2 * var(--control-pad-y) + 2px);
  transition:
    border-color var(--transition-md),
    box-shadow var(--transition-md),
    background var(--transition-md);
}

.field-error {
  color: var(--danger);
  font-size: var(--fs-sm);
  margin: -0.25rem 0 0;
}

.select {
  font-size: var(--fs-control);
  line-height: var(--lh-control);
  padding-block: var(--control-pad-y);
  padding-inline: var(--control-pad-x);
  padding-right: 2.2em;
  min-height: var(--control-min-height);
  border: var(--border-1) solid var(--input-border);
  background: var(--panel);
  color: var(--text-main);
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%23A0A4AF' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75em center;
  background-size: 0.65em;
  transition:
    border-color var(--transition-md),
    box-shadow var(--transition-md),
    background-color var(--transition-md);
}

.select:focus-visible {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--brand), transparent 80%);
}

.select:hover {
  border-color: var(--border-strong);
}

/* Native dropdown options — dark theme */
:root[data-theme="dark"] .select option {
  background: var(--bg-elevated);
  color: var(--text-main);
}

:root[data-theme="dark"] .select option:checked {
  background: color-mix(in srgb, var(--primary) 25%, var(--bg-elevated));
}

:root[data-theme="dark"] .select option:hover {
  background: color-mix(in srgb, var(--primary) 12%, transparent);
}

label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

/* =========================
   Cards
   ========================= */

.card {
  --card-bg: var(--panel);
  --card-border: var(--border-subtle);
  --card-radius: var(--radius-lg);
  --card-pad-x: var(--space-4);
  --card-pad-y: var(--space-4);
  --card-gap: var(--space-3);
  --card-shadow: var(--shadow-soft);

  background: var(--card-bg);
  color: var(--text-main);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  gap: var(--card-gap);
}

.card__body {
  padding: var(--card-pad-y) var(--card-pad-x);
  margin: 0;
}

.card__body > *:first-child { margin-top: 0; }
.card__body > *:last-child { margin-bottom: 0; }

.card--panel {
  --card-bg: var(--panel);
  --card-border: var(--border-subtle);
  --card-shadow: var(--shadow-subtle);
}

/* =========================
   Badges
   ========================= */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  line-height: 1;
  padding: 0.3em 0.65em;
  border-radius: var(--r-pill);
  white-space: nowrap;
  border: 1px solid transparent;
}

.badge--primary {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 20%, transparent);
}

.badge--success {
  background: color-mix(in srgb, var(--success) 12%, transparent);
  color: var(--success);
  border-color: color-mix(in srgb, var(--success) 20%, transparent);
}

.badge--neutral {
  background: var(--bg-soft);
  color: var(--text-muted);
  border-color: var(--border-subtle);
}

/* =========================
   Layout
   ========================= */

.page-shell {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-5);
  padding-block: var(--space-6);
}

@media (max-width: 768px) {
  .page-shell {
    padding-inline: var(--space-4);
    padding-block: var(--space-4);
  }
}