/*
 * Event QR Code Creator – shared stylesheet, loaded by index.html.
 *
 * Single page: a header, a two-column layout (event form + QR result panel)
 * that stacks to one column below 860px, and a footer. Organized as:
 * variables/reset, header, layout shell, form styling, result panel,
 * buttons, footer, then responsive overrides at the bottom.
 */

:root {
  --bg: #F3F4F9;
  --surface: #FFFFFF;
  --border: #DEE1EA;
  --text: #1B1E2B;
  --text-dim: #5B5F73;
  --text-faint: #7A7E93;
  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --primary-contrast: #FFFFFF;
  --error: #B3132C;
  --error-bg: #FDEDEF;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(27, 30, 43, 0.04), 0 8px 24px rgba(27, 30, 43, 0.06);
}

* { box-sizing: border-box; }

/* Several elements below (.time-input, .result-placeholder, .result-output)
   are shown/hidden purely by toggling the `hidden` attribute in scripts.js,
   but also carry their own `display: flex` rule for when they're visible.
   Both have the same specificity as the browser's built-in `[hidden] {
   display: none }`, and author CSS wins that tie – so without this, the
   `display: flex` rule would silently override `hidden` and the element
   would stay on screen. This makes `hidden` authoritative everywhere. */
[hidden] { display: none !important; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  min-height: 100vh;
  line-height: 1.5;
}

h1, h2, legend {
  font-family: 'Space Grotesk', sans-serif;
}

/* Keyboard-focus ring, consistent across all interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: var(--primary-contrast);
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 8px 0;
  z-index: 100;
  text-decoration: none;
}

.skip-link:focus {
  left: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   Site navigation
   ============================================================
   Deep "metallic" purple: a diagonal gradient with a brighter band through
   the middle to read as a brushed-metal sheen rather than a flat fill.
   Every stop was checked against white text and comes in at 7:1+ contrast
   (WCAG AA needs 4.5:1), so the text stays readable no matter which part
   of the gradient it happens to sit over. */
.site-nav {
  position: relative;
  background: linear-gradient(135deg, #2E1065 0%, #5B21B6 40%, #6D28D9 50%, #5B21B6 60%, #2E1065 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 2px 8px rgba(0, 0, 0, 0.25);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-brand {
  color: #fff;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  opacity: 0.9;
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  opacity: 1;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
  border-radius: 2px;
}

@media (max-width: 500px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #2E1065;
    padding: 0.25rem 1.5rem 0.5rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
  }

  .nav-link {
    display: block;
    padding: 0.85rem 0;
  }
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  padding: 2.5rem 1.5rem 1.5rem;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
}

.brand-mark {
  color: var(--primary);
  font-size: 1.3rem;
}

.header-tagline {
  margin: 0.5rem 0 0;
  color: var(--text-dim);
  font-size: 1rem;
}

/* Plain page-title header for content pages (About, Contact) – same
   placement and spacing as .site-header above, sitting outside the boxed
   .content-card rather than as a heading inside it, but without the
   brand-mark icon or tagline that are specific to the home page's hero. */
.page-header {
  padding: 2.5rem 1.5rem 1.5rem;
  text-align: center;
}

.page-header h1 {
  margin: 0;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
}

/* ============================================================
   Layout
   ============================================================ */
main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.type-selector-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.75rem;
  margin-bottom: 1.5rem;
}

.type-field {
  max-width: 320px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 1.5rem;
  align-items: start;
}

.form-card,
.result-card,
.content-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem;
}

.content-card {
  max-width: 640px;
  margin: 0 auto;
}

.content-card h1 {
  margin: 0 0 1rem;
  font-size: 1.4rem;
}

.content-card p {
  margin: 0 0 1rem;
  color: var(--text-dim);
}

.content-card p:last-child {
  margin-bottom: 0;
}

.tab-list {
  display: flex;
  gap: 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem;
}

.tab-button {
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-dim);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.6rem 0.25rem;
  margin-bottom: -1px;
  cursor: pointer;
}

.tab-button:hover {
  color: var(--text);
}

.tab-button[aria-selected="true"] {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Each tab panel's own last paragraph isn't really the card's last element
   (the "Built by WebSweetWeb" line follows both panels) -- .content-card
   p:last-child above would otherwise strip its bottom margin too, since
   :last-child only checks position among its own parent's children. */
.tab-panel p:last-child {
  margin-bottom: 1rem;
}

.content-card a {
  color: var(--primary);
}

.result-card {
  position: sticky;
  top: 1.5rem;
}

.form-card h1 {
  margin: 0 0 0.35rem;
  font-size: 1.4rem;
}

.result-card h2 {
  margin: 0 0 1rem;
  font-size: 1.2rem;
}

.form-intro {
  margin: 0 0 1.5rem;
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* ============================================================
   Form fields
   ============================================================ */
form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field > label,
.label-row label,
fieldset.field > legend {
  font-weight: 600;
  font-size: 0.9rem;
}

.label-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  position: relative;
}

.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: none;
  background: none;
  padding: 0;
  font-size: 0.95rem;
  line-height: 1;
  cursor: help;
}

.tooltip {
  position: absolute;
  bottom: 100%;
  left: 0;
  margin-bottom: 0.4rem;
  width: max-content;
  max-width: 220px;
  background: var(--text);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 400;
  line-height: 1.4;
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  pointer-events: none;
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0s linear 0.15s;
  z-index: 10;
}

.info-icon:hover + .tooltip,
.info-icon:focus-visible + .tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0s;
}

fieldset.field {
  border: 0;
  margin: 0;
  padding: 0;
}

fieldset.field > legend {
  padding: 0;
  margin-bottom: 0.4rem;
}

.required {
  color: var(--error);
}

input[type="text"],
input[type="date"],
select,
textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  width: 100%;
}

textarea {
  resize: vertical;
  min-height: 4.5rem;
}

input[aria-invalid="true"] {
  border-color: var(--error);
}

.field-row {
  display: flex;
  gap: 1.25rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.field-row .location-field {
  flex: 1 1 200px;
}

.toggle-field {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  flex: 0 0 auto;
}

.toggle-text {
  font-weight: 600;
  font-size: 0.9rem;
}

.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #E4E6EF;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.toggle-switch[aria-checked="true"] {
  background: var(--primary);
  border-color: var(--primary);
}

.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(27, 30, 43, 0.25);
  transition: transform 0.15s ease;
}

.toggle-switch[aria-checked="true"] .toggle-thumb {
  transform: translateX(20px);
}

.checkbox-field {
  flex-direction: row;
  align-items: center;
  gap: 0.55rem;
}

.checkbox-field input[type="checkbox"] {
  width: 1.05rem;
  height: 1.05rem;
  accent-color: var(--primary);
}

.checkbox-field label {
  font-weight: 500;
  font-size: 0.95rem;
}

.datetime-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.date-input {
  flex: 1 1 160px;
}

.date-input input {
  width: 100%;
}

.time-input {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex: 1 1 220px;
}

.time-input select {
  width: auto;
  min-width: 4.2rem;
  flex: 1;
}

.time-sep {
  color: var(--text-faint);
  font-weight: 600;
}

.field-hint {
  margin: 0;
  color: var(--text-faint);
  font-size: 0.82rem;
}

.field-error,
.form-error {
  margin: 0;
  color: var(--error);
  font-size: 0.85rem;
}

.field-error:empty,
.form-error:empty {
  display: none;
}

.form-error:not(:empty) {
  background: var(--error-bg);
  border: 1px solid var(--error);
  border-radius: 8px;
  padding: 0.65rem 0.85rem;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn-generate,
.btn-download {
  font: inherit;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.btn-generate {
  background: var(--primary);
  color: var(--primary-contrast);
  align-self: flex-start;
}

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

/* Fires on every click of Generate QR Code, pass or fail validation --
   it's acknowledging the press itself, not the outcome. */
.btn-generate.flash-press {
  animation: btn-press-flash 0.5s ease;
}

@keyframes btn-press-flash {
  0%, 100% { background-color: var(--primary); }
  35% { background-color: var(--primary-hover); }
}

.btn-download {
  background: var(--surface);
  color: var(--primary);
  border: 1px solid var(--primary);
  width: 100%;
}

.btn-download:hover {
  background: #EEF0FF;
}

/* ============================================================
   Result panel
   ============================================================ */
.result-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2.5rem 1rem;
  text-align: center;
  color: var(--text-faint);
}

.placeholder-icon {
  font-size: 2.5rem;
  color: var(--border);
}

.result-placeholder p {
  margin: 0;
  font-size: 0.9rem;
}

.result-output {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.qr-wrapper {
  width: 100%;
  max-width: 260px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  background: #fff;
}

/* Fires once a freshly-generated QR code lands in the panel, so it's
   obvious something just appeared rather than being missed on scroll. */
.qr-wrapper.flash-new {
  animation: qr-new-flash 0.7s ease;
}

@keyframes qr-new-flash {
  0%, 100% { background-color: #fff; }
  30% { background-color: #EEF0FF; }
}

.qr-image {
  width: 100%;
  line-height: 0;
}

/* Slow fade/scale-in for the QR graphic itself, separate from the quick
   .qr-wrapper background flash above -- the flash says "look here", this
   is the graceful 1s reveal of the code once you're looking. */
.qr-image.reveal-in {
  animation: qr-reveal-in 1s ease;
}

@keyframes qr-reveal-in {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.qr-image svg {
  width: 100%;
  height: auto;
  display: block;
}

.result-caption {
  margin: 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  text-align: center;
  padding: 1.5rem 1.5rem 2.5rem;
  color: var(--text-faint);
  font-size: 0.85rem;
}

.site-footer p {
  margin: 0;
}

.site-footer p + p {
  margin-top: 0.35rem;
}

.site-footer a {
  color: var(--primary);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .result-card {
    position: static;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn-generate.flash-press,
  .qr-wrapper.flash-new,
  .qr-image.reveal-in {
    animation: none;
  }
}