/* ==========================================================================
   GSWESTOK QR Generator — styles
   ========================================================================== */

:root {
  --gs-green: #00b451;
  --gs-green-dark: #00893f;
  --gs-green-darker: #046634;
  --gs-green-tint: #e5f7ec;
  --gs-ink: #16261d;
  --gs-ink-soft: #4d5c53;
  --gs-bg: #f3f7f4;
  --gs-card: #ffffff;
  --gs-border: #e0e8e3;
  --gs-border-strong: #c9d6cd;
  --gs-danger: #c0392b;

  --font-display: 'Poppins', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-card: 0 1px 2px rgba(22, 38, 29, 0.04), 0 10px 30px -12px rgba(22, 38, 29, 0.14);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--gs-bg);
  color: var(--gs-ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------- header ---------- */

.site-header {
  background: var(--gs-card);
  border-bottom: 1px solid var(--gs-border);
}

.site-header__inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 22px 32px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-header__logo {
  height: 34px;
  width: auto;
  display: block;
}

.site-header__title {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 1px solid var(--gs-border);
  padding-left: 20px;
}

.site-header__eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gs-green-dark);
}

.site-header__title h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--gs-ink);
}

/* ---------- layout ---------- */

.workspace {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px;
  display: grid;
  grid-template-columns: minmax(320px, 420px) 1fr;
  gap: 24px;
  align-items: stretch;
}

.panel {
  background: var(--gs-card);
  border: 1px solid var(--gs-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 24px;
}

.panel--options { display: flex; flex-direction: column; }
.panel--output { display: flex; flex-direction: column; align-items: stretch; }

/* ---------- tabs ---------- */

.tabs {
  position: relative;
  display: flex;
  gap: 4px;
  background: var(--gs-bg);
  border: 1px solid var(--gs-border);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 22px;
}

.tab {
  flex: 1;
  position: relative;
  z-index: 1;
  border: none;
  background: transparent;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13.5px;
  color: var(--gs-ink-soft);
  padding: 9px 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 0.2s ease;
}

.tab.is-active { color: #ffffff; }

.tabs__indicator {
  position: absolute;
  top: 4px;
  left: 4px;
  height: calc(100% - 8px);
  width: calc(25% - 4px);
  background: var(--gs-green);
  border-radius: var(--radius-sm);
  transition: transform 0.28s cubic-bezier(.4,0,.2,1);
  box-shadow: 0 4px 10px -4px rgba(0, 137, 63, 0.55);
}

/* ---------- fields ---------- */

.fields { margin-bottom: 8px; }

.field-group { display: none; flex-direction: column; }
.field-group.is-active { display: flex; }

.field-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--gs-ink-soft);
  margin: 14px 0 6px;
}

.field-group > .field-label:first-child { margin-top: 0; }

.text-input {
  width: 100%;
  font-family: var(--font-body);
  font-size: 14.5px;
  color: var(--gs-ink);
  background: #fbfdfc;
  border: 1.5px solid var(--gs-border-strong);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.text-input:focus {
  border-color: var(--gs-green);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(0, 180, 81, 0.15);
}

.text-input--area { resize: vertical; min-height: 96px; }

.select-input { appearance: none; cursor: pointer; }

/* scrolling contact list — fixed height so switching tabs doesn't reflow the page */
.scroll-list {
  display: flex;
  flex-direction: column;
  max-height: 320px;
  overflow-y: auto;
  padding-right: 6px;
}

.scroll-list::-webkit-scrollbar { width: 7px; }
.scroll-list::-webkit-scrollbar-thumb { background: var(--gs-border-strong); border-radius: 10px; }
.scroll-list::-webkit-scrollbar-track { background: transparent; }

/* keep every field-group panel the same footprint so the layout doesn't jump */
.fields { min-height: 340px; }

/* ---------- style section ---------- */

.style-section { margin-top: 6px; padding-top: 18px; border-top: 1px solid var(--gs-border); }

.style-section__header {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
}

.style-tab {
  border: 1.5px solid var(--gs-border-strong);
  background: #fbfdfc;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gs-ink-soft);
  padding: 7px 16px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.style-tab.is-active {
  background: var(--gs-green);
  border-color: var(--gs-green);
  color: #ffffff;
}

.style-tab:not(.is-active):hover { border-color: var(--gs-green); color: var(--gs-green-darker); }

.style-view { display: none; }
.style-view.is-active { display: block; }

.color-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 2px;
  border-bottom: 1px solid var(--gs-border);
}
.color-row:last-child { border-bottom: none; }

.color-row__label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--gs-ink);
}

.color-swatch {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  border: 1.5px solid var(--gs-border-strong);
  cursor: pointer;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,0.6);
  transition: transform 0.12s ease, border-color 0.15s ease;
}
.color-swatch:hover { transform: scale(1.06); border-color: var(--gs-green); }

.toggle-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.toggle-group { display: flex; flex-direction: column; gap: 6px; }

.toggle-group__label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--gs-ink-soft);
}

.toggle-group__buttons {
  display: flex;
  border: 1.5px solid var(--gs-border-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.toggle-btn {
  flex: 1;
  border: none;
  background: #fbfdfc;
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--gs-ink-soft);
  padding: 9px 4px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
  border-right: 1px solid var(--gs-border-strong);
}

.toggle-btn:last-child { border-right: none; }

.toggle-btn.is-active {
  background: var(--gs-green);
  color: #ffffff;
}

.toggle-btn:not(.is-active):hover { background: var(--gs-green-tint); color: var(--gs-green-darker); }

/* ---------- buttons ---------- */

.btn {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14.5px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  padding: 13px 20px;
  transition: transform 0.12s ease, box-shadow 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}

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

.btn--primary {
  background: var(--gs-green);
  color: #ffffff;
  box-shadow: 0 8px 20px -8px rgba(0, 137, 63, 0.55);
}
.btn--primary:hover { background: var(--gs-green-dark); }

.btn--generate {
  margin-top: 6px;
  width: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
}

.btn--generate.is-loading .btn__label { opacity: 0; }
.btn--generate.is-loading { pointer-events: none; background: var(--gs-green-dark); }

.btn__spinner {
  display: none;
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2.5px solid rgba(255,255,255,0.35);
  border-top-color: #ffffff;
}

.btn--generate.is-loading .btn__spinner {
  display: block;
  animation: spin 0.75s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.field-error {
  min-height: 18px;
  margin: 10px 2px 0;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--gs-danger);
}

.btn--secondary {
  background: #ffffff;
  color: var(--gs-green-darker);
  border: 1.5px solid var(--gs-border-strong);
  margin-top: 18px;
  width: 100%;
}
.btn--secondary:hover:not(:disabled) { border-color: var(--gs-green); background: var(--gs-green-tint); }
.btn--secondary:disabled { color: #a9b6ae; cursor: not-allowed; }

/* ---------- output panel ---------- */

.preview-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 380px;
}

.preview-frame {
  position: relative;
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-md);
  background:
    linear-gradient(135deg, #eef4f0 25%, transparent 25%) -12px 0/24px 24px,
    linear-gradient(225deg, #eef4f0 25%, transparent 25%) -12px 0/24px 24px,
    linear-gradient(45deg, #eef4f0 25%, transparent 25%) 0 0/24px 24px,
    linear-gradient(315deg, #eef4f0 25%, #fafcfb 25%) 0 0/24px 24px;
  border: 1px solid var(--gs-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.preview-placeholder {
  max-width: 240px;
  text-align: center;
  font-size: 13.5px;
  line-height: 1.5;
  color: #8b978f;
  font-weight: 500;
  padding: 0 20px;
}

.qr-canvas {
  width: 90%;
  height: 90%;
  object-fit: contain;
}

.qr-canvas.is-revealing {
  animation: qr-reveal 0.9s cubic-bezier(.25,.8,.35,1) both;
}

@keyframes qr-reveal {
  0%   { opacity: 0; filter: blur(18px) saturate(0.6); transform: scale(0.88); }
  55%  { opacity: 1; filter: blur(6px) saturate(0.85); transform: scale(1.015); }
  100% { opacity: 1; filter: blur(0) saturate(1); transform: scale(1); }
}

/* smoke puffs that billow and clear as the code reveals */
.smoke-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.smoke-puff {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.95) 0%, rgba(240,244,242,0.5) 45%, rgba(240,244,242,0) 72%);
  filter: blur(2px);
  opacity: 0;
  animation: smoke-drift 1.1s ease-out forwards;
}

@keyframes smoke-drift {
  0%   { opacity: 0;   transform: translate(0,0) scale(0.3); }
  18%  { opacity: 0.9; }
  100% { opacity: 0;   transform: translate(var(--dx), var(--dy)) scale(var(--sc)); }
}

/* ---------- color picker modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(22, 38, 29, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  animation: modal-fade-in 0.15s ease both;
}

.modal-overlay[hidden] { display: none; }

@keyframes modal-fade-in { from { opacity: 0; } to { opacity: 1; } }

.color-modal {
  background: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px -20px rgba(0,0,0,0.4);
  padding: 20px;
  width: 100%;
  max-width: 280px;
  animation: modal-pop-in 0.18s cubic-bezier(.25,.8,.35,1) both;
}

@keyframes modal-pop-in { from { opacity: 0; transform: scale(0.94) translateY(6px); } to { opacity: 1; transform: scale(1) translateY(0); } }

.color-modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.color-modal__title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  margin: 0;
  color: var(--gs-ink);
}

.color-modal__close {
  border: none;
  background: transparent;
  font-size: 20px;
  line-height: 1;
  color: var(--gs-ink-soft);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 6px;
}
.color-modal__close:hover { background: var(--gs-bg); color: var(--gs-ink); }

.color-field-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 240 / 170;
  border-radius: 10px;
  overflow: hidden;
  cursor: crosshair;
  margin-bottom: 12px;
  border: 1px solid var(--gs-border);
}

.color-field-wrap canvas { width: 100%; height: 100%; display: block; }

.color-field__handle {
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2.5px solid #ffffff;
  box-shadow: 0 0 0 1.5px rgba(0,0,0,0.35), 0 2px 4px rgba(0,0,0,0.25);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hue-slider-wrap {
  position: relative;
  width: 100%;
  height: 16px;
  border-radius: 999px;
  overflow: hidden;
  cursor: pointer;
  margin-bottom: 16px;
  border: 1px solid var(--gs-border);
}

.hue-slider-wrap canvas { width: 100%; height: 100%; display: block; }

.hue-slider__handle {
  position: absolute;
  top: 50%;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2.5px solid #ffffff;
  box-shadow: 0 0 0 1.5px rgba(0,0,0,0.35), 0 2px 4px rgba(0,0,0,0.25);
  transform: translate(-50%, -50%);
  pointer-events: none;
  background: transparent;
}

.color-modal__footer {
  display: flex;
  align-items: center;
  gap: 8px;
}

.color-modal__preview {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1.5px solid var(--gs-border-strong);
  flex-shrink: 0;
}

.hex-input {
  flex: 1;
  text-transform: uppercase;
  font-family: 'Courier New', monospace;
  letter-spacing: 0.03em;
}

.color-modal__save { flex-shrink: 0; padding: 10px 18px; }

/* ---------- footer ---------- */

.site-footer {
  text-align: center;
  padding: 28px 20px 40px;
  color: #8b978f;
  font-size: 12.5px;
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .workspace { grid-template-columns: 1fr; padding: 20px; gap: 18px; }
  .preview-stage { min-height: 300px; }
  .preview-frame { max-width: 340px; }
}

@media (max-width: 480px) {
  .site-header__inner { padding: 14px 16px; gap: 10px; flex-wrap: wrap; }
  .site-header__logo { height: 26px; }
  .site-header__title { padding-left: 10px; }
  .site-header__title h1 { font-size: 17px; }
  .site-header__eyebrow { font-size: 11px; }

  .workspace { padding: 14px; gap: 14px; }
  .panel { padding: 16px; border-radius: var(--radius-md); }

  .tab { font-size: 12.5px; padding: 8px 4px; }

  .toggle-row { grid-template-columns: 1fr; gap: 10px; }
  .toggle-btn { font-size: 12.5px; padding: 9px 4px; }

  .scroll-list { max-height: 260px; }
  .fields { min-height: 0; }

  .preview-stage { min-height: 260px; }
  .preview-frame { max-width: 280px; }

  .btn { font-size: 14px; padding: 12px 16px; }

  .site-footer { padding: 20px 16px 28px; font-size: 12px; }
}

/* keyboard focus visibility */
.tab:focus-visible,
.toggle-btn:focus-visible,
.btn:focus-visible,
.text-input:focus-visible {
  outline: 2.5px solid var(--gs-green-dark);
  outline-offset: 2px;
}