/* =========================================================
   StarQR — components.css
   UI Components — Input, Buttons, QR Card, Toast
   Each section is self-contained and reusable.
   ========================================================= */

/* ══════════════════════════════════════════════════════════
   INPUT SECTION
   URL input field with floating label, clear button,
   and inline error messaging.
   ══════════════════════════════════════════════════════════ */

.input-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  animation: sectionEntrance 450ms var(--ease-out) 80ms both;
}

@keyframes sectionEntrance {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Input Wrapper ── */
.input-wrapper {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Label above the input field */
.input-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  padding-left: 2px;
  transition: color var(--dur-fast) var(--ease-out);
}

/* Container for input + icons + clear button */
.input-field-group {
  position: relative;
  display: flex;
  align-items: center;
}

/* ── Input Field ── */
.input-field {
  width: 100%;
  height: 56px;
  padding: 0 48px 0 44px;            /* Space for left icon + right clear btn */
  background: var(--card-solid);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font);
  font-size: var(--text-md);
  font-weight: 400;
  color: var(--text-primary);
  outline: none;
  transition:
    border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out);
  touch-action: manipulation;         /* Optimize for mobile touch */
  -webkit-appearance: none;
  appearance: none;
}

.input-field::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

/* Focus state — purple glow ring */
.input-field:focus {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-glow);
  background: #fff;
}

/* Change label color when input is focused */
.input-wrapper:focus-within .input-label {
  color: var(--primary);
}

/* ── Input Icons ── */
/* Positioned absolutely inside the input field */
.input-icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  pointer-events: none;               /* Don't intercept clicks */
  transition: color var(--dur-fast) var(--ease-out);
}

.input-icon--left {
  left: 14px;
}

/* Size Font Awesome icons inside input */
.input-icon--left i {
  width: 18px;
  height: 18px;
  font-size: 16px;
  line-height: 18px;
  text-align: center;
}

/* Icon turns purple when input is focused */
.input-wrapper:focus-within .input-icon--left {
  color: var(--primary);
}

/* ── Clear Button (× inside input) ── */
.input-clear-btn {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
  transition:
    background var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out),
    opacity var(--dur-fast) var(--ease-out);
  opacity: 0;
  pointer-events: none;
}

/* Show clear button when not hidden */
.input-clear-btn:not([hidden]) {
  opacity: 1;
  pointer-events: auto;
}

/* Size the × icon */
.input-clear-btn i {
  font-size: 12px;
}

/* Hover: red background hint */
.input-clear-btn:hover {
  background: var(--error-light);
  color: var(--error);
}

/* Tap: scale down feedback */
.input-clear-btn:active {
  transform: translateY(-50%) scale(0.90);
}

/* ── Error Message ── */
.input-error {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--error);
  padding: 0 2px;
  animation: errorShake 300ms ease-in-out;
}

/* Size the error icon */
.input-error i {
  font-size: 12px;
  flex-shrink: 0;
}

.input-error[hidden] { display: none; }

/* Error state — red border + glow on the input field */
.input-wrapper--error .input-field {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

/* Shake animation for error feedback */
@keyframes errorShake {
  0%, 100% { transform: translateX(0); }
  15%       { transform: translateX(-6px); }
  30%       { transform: translateX(5px); }
  45%       { transform: translateX(-4px); }
  60%       { transform: translateX(3px); }
  75%       { transform: translateX(-2px); }
}


/* ══════════════════════════════════════════════════════════
   BUTTONS
   Base button styles + variants for generate, download,
   copy, and clear actions.
   ══════════════════════════════════════════════════════════ */

/* ── Base Button ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font);
  font-weight: 600;
  font-size: var(--text-base);
  cursor: pointer;
  touch-action: manipulation;
  position: relative;
  overflow: hidden;
  transition:
    transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out),
    opacity var(--dur-fast) var(--ease-out);
  -webkit-appearance: none;
  user-select: none;
  white-space: nowrap;
}

/* Tap feedback for all buttons */
.btn:active:not(:disabled) {
  transform: scale(0.97);
}

/* ── Generate Button (Primary CTA) ── */
.btn--generate {
  width: 100%;
  height: 52px;
  background: linear-gradient(135deg, var(--primary) 0%, #6366F1 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
  letter-spacing: 0.1px;
}

.btn--generate:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--primary-dark) 0%, #4F46E5 100%);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.42);
  transform: translateY(-1px);
}

.btn--generate:active:not(:disabled) {
  transform: scale(0.98) translateY(0);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.28);
}

.btn--generate:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

/* Size the QR icon inside generate button */
.btn--generate .btn__icon {
  font-size: 16px;
}

/* ── Loading Spinner ── */
/* Hidden by default, shown when .btn--loading is active */
.btn__spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  flex-shrink: 0;
  animation: spin 600ms linear infinite;
}

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

/* Loading state classes */
.btn--loading .btn__spinner { display: block; }
.btn--loading .btn__icon    { display: none; }
.btn--loading .btn__text    { opacity: 0.85; }

/* ── Action Buttons Row ── */
/* 3-column grid for Download, Copy, Clear */
.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-xs);
  margin-top: 4px;
}

.action-row[hidden] { display: none; }

/* ── Action Button Base ── */
.btn--action {
  height: 48px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  flex-direction: column;
  gap: 4px;
  border: 1.5px solid transparent;
  transition:
    transform var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
}

/* Size Font Awesome icons in action buttons */
.btn--action i {
  font-size: 14px;
}

/* ── Download Button ── */
.btn--download {
  background: var(--primary-light);
  color: var(--primary);
  border-color: rgba(79, 70, 229, 0.15);
}

.btn--download:hover:not(:disabled) {
  background: rgba(79, 70, 229, 0.13);
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.14);
}

/* ── Copy Button ── */
.btn--copy {
  background: var(--accent-light);
  color: var(--accent);
  border-color: rgba(6, 182, 212, 0.18);
}

.btn--copy:hover:not(:disabled) {
  background: rgba(6, 182, 212, 0.16);
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(6, 182, 212, 0.16);
}

/* ── Clear Button ── */
.btn--clear {
  background: var(--danger-light);
  color: var(--danger);
  border-color: rgba(248, 113, 113, 0.18);
}

.btn--clear:hover:not(:disabled) {
  background: rgba(248, 113, 113, 0.16);
  border-color: var(--danger);
  box-shadow: 0 2px 8px rgba(248, 113, 113, 0.14);
}

/* ── Copy Icon → Checkmark Morphing ── */
/* When "Copied", the copy icon hides and checkmark appears */
.icon-check { display: none; }

.btn--copy.copied .icon-copy  { display: none; }
.btn--copy.copied .icon-check {
  display: block;
  animation: iconPop var(--dur-normal) var(--ease-spring) both;
}
.btn--copy.copied {
  background: var(--success-light);
  color: var(--success);
  border-color: rgba(16, 185, 129, 0.2);
}

@keyframes iconPop {
  from { transform: scale(0.5) rotate(-20deg); opacity: 0; }
  to   { transform: scale(1) rotate(0deg);     opacity: 1; }
}

/* ── Download Bounce Animation ── */
.btn--download:active i {
  animation: downloadBounce 300ms var(--ease-spring);
}

@keyframes downloadBounce {
  0%   { transform: translateY(0); }
  40%  { transform: translateY(3px); }
  70%  { transform: translateY(-2px); }
  100% { transform: translateY(0); }
}


/* ══════════════════════════════════════════════════════════
   QR CODE SECTION
   Preview card with empty state, QR output, and domain
   label. Uses glassmorphism for premium feel.
   ══════════════════════════════════════════════════════════ */

.qr-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  flex: 1;
  animation: sectionEntrance 500ms var(--ease-out) 160ms both;
}

/* ── QR Card ── */
/* Glassmorphism card with backdrop blur */
.qr-card {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-md);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  position: relative;
  overflow: hidden;
  transition:
    box-shadow var(--dur-slow) var(--ease-out),
    border-color var(--dur-slow) var(--ease-out);
}

/* Subtle gloss overlay for premium feel */
.qr-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.6) 0%, rgba(255,255,255,0) 60%);
  pointer-events: none;
}

/* ── Empty State ── */
/* Shown before any QR code is generated */
.qr-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  animation: fadeIn var(--dur-slow) var(--ease-out) both;
}

/* Pulsing icon wrapper */
.qr-empty__icon-wrap {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  box-shadow: var(--shadow-xs);
  animation: idlePulse 2.8s ease-in-out infinite;
}

/* Size Font Awesome icon in empty state */
.qr-empty__icon-wrap i {
  font-size: 28px;
}

@keyframes idlePulse {
  0%, 100% { box-shadow: var(--shadow-xs), 0 0 0 0 var(--primary-glow); transform: scale(1); }
  50%       { box-shadow: var(--shadow-xs), 0 0 0 8px transparent; transform: scale(1.03); }
}

/* Instructional text */
.qr-empty__text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-align: center;
  max-width: 220px;
  line-height: 1.55;
  font-weight: 500;
}

/* ── QR Output ── */
/* Container for the generated QR code + domain label */
.qr-output {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  animation: qrReveal var(--dur-slow) var(--ease-spring) both;
}

.qr-output[hidden] { display: none; }

@keyframes qrReveal {
  from { opacity: 0; transform: scale(0.88) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

/* QR image container — fixed size prevents layout shift (CLS) */
.qr-image-wrap {
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border-radius: var(--radius-sm);
  padding: 10px;
  box-shadow:
    var(--shadow-sm),
    0 0 0 1px rgba(229, 234, 242, 0.8);
  flex-shrink: 0;
  overflow: hidden;
  line-height: 0;               /* Remove inline gap under canvas   */
  position: relative;
}

/* Force QR canvas/img to exact size — prevents scanner issues */
.qr-image-wrap canvas,
.qr-image-wrap img {
  width: 200px !important;
  height: 200px !important;
  max-width: 200px !important;
  max-height: 200px !important;
  border-radius: 0;
  flex-shrink: 0;
}

/* ── Domain Label ── */
/* Shows the URL domain below the QR code */
.qr-domain {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-weight: 500;
  max-width: 240px;
}

/* Size the globe icon */
.qr-domain i {
  font-size: 12px;
  flex-shrink: 0;
  color: var(--primary);
}

/* Truncate long domain names */
.qr-domain__text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── QR Card States ── */
/* "Filled" state — enhanced shadow when QR is present */
.qr-card--filled {
  border-color: rgba(79, 70, 229, 0.15);
  box-shadow: var(--shadow-lg);
}

/* Collapse animation on clear */
.qr-card--collapse {
  animation: qrCollapse var(--dur-xslow) var(--ease-in) both;
}

@keyframes qrCollapse {
  from { opacity: 1; transform: scale(1); }
  to   { opacity: 0; transform: scale(0.92); }
}


/* ══════════════════════════════════════════════════════════
   TOAST NOTIFICATION
   Fixed-position popup for success/error feedback.
   Slides up from the bottom, auto-dismisses.
   ══════════════════════════════════════════════════════════ */

.toast {
  position: fixed;
  bottom: calc(var(--space-lg) + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text-primary);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 8px 24px rgba(17, 24, 39, 0.25);
  z-index: 1000;
  pointer-events: none;
  opacity: 0;
  transition:
    opacity var(--dur-normal) var(--ease-out),
    transform var(--dur-normal) var(--ease-spring);
  white-space: nowrap;
}

.toast[hidden] { display: none; }

/* Size the checkmark icon */
.toast i {
  font-size: 14px;
  color: var(--success);
}

/* Toast visible state (toggled by JS) */
.toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Toast hiding state — slides back down */
.toast--hiding {
  opacity: 0;
  transform: translateX(-50%) translateY(10px);
  transition:
    opacity var(--dur-fast) var(--ease-in),
    transform var(--dur-fast) var(--ease-in);
}