/* Import Modern Font */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* ================================================================
   VARIABLES & THEMES  (Black & White)
================================================================ */
:root {
  --accent:        #000000;
  --accent-inv:    #ffffff;
  --transition:    all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --radius-card:   26px;
  --radius-btn:    14px;
  --radius-input:  13px;
}

/* ── Dark theme: black background, white content ── */
[data-theme="dark"] {
  --bg:            #0a0a0a;
  --bg-grad:       radial-gradient(ellipse at 50% 0%, #161616 0%, #0a0a0a 65%);
  --surface:       #131313;
  --surface-hi:    #1c1c1c;
  --text:          #f5f5f5;
  --text-muted:    rgba(245,245,245,0.45);
  --border:        rgba(255,255,255,0.10);
  --border-strong: rgba(255,255,255,0.22);
  --input-bg:      rgba(255,255,255,0.05);
  --input-text:    #f5f5f5;
  --card-shadow:   0 24px 56px rgba(0,0,0,0.70), 0 0 0 1px rgba(255,255,255,0.06);
  --spinner-track: rgba(255,255,255,0.10);
  --spinner-head:  #ffffff;
  --decoded-bg:    rgba(255,255,255,0.04);
  --video-border:  rgba(255,255,255,0.25);
  --scan-color:    rgba(255,255,255,0.85);
  --file-border:   rgba(255,255,255,0.25);
  --file-bg:       rgba(255,255,255,0.03);
  --success-border:#5aff9a;
  --success-bg:    rgba(90,255,154,0.06);
  --icon-stroke:   #f5f5f5;
  --btn-primary-bg:#ffffff;
  --btn-primary-fg:#0a0a0a;
  --btn-primary-sh: 0 8px 24px rgba(255,255,255,0.12);
  --btn-sec-border: rgba(255,255,255,0.30);
  --btn-sec-hover:  rgba(255,255,255,0.07);
  --link-color:    rgba(245,245,245,0.65);
  --link-hover-bg: rgba(255,255,255,0.06);
}

/* ── Light theme: white background, black content ── */
[data-theme="light"] {
  --bg:            #f9f9f9;
  --bg-grad:       radial-gradient(ellipse at 50% 0%, #efefef 0%, #f9f9f9 65%);
  --surface:       #ffffff;
  --surface-hi:    #f2f2f2;
  --text:          #111111;
  --text-muted:    rgba(17,17,17,0.45);
  --border:        rgba(0,0,0,0.08);
  --border-strong: rgba(0,0,0,0.18);
  --input-bg:      #ffffff;
  --input-text:    #111111;
  --card-shadow:   0 16px 48px rgba(0,0,0,0.10), 0 0 0 1px rgba(0,0,0,0.06);
  --spinner-track: rgba(0,0,0,0.10);
  --spinner-head:  #111111;
  --decoded-bg:    rgba(0,0,0,0.03);
  --video-border:  rgba(0,0,0,0.20);
  --scan-color:    rgba(0,0,0,0.80);
  --file-border:   rgba(0,0,0,0.20);
  --file-bg:       rgba(0,0,0,0.02);
  --success-border:#18a558;
  --success-bg:    rgba(24,165,88,0.06);
  --icon-stroke:   #111111;
  --btn-primary-bg:#111111;
  --btn-primary-fg:#ffffff;
  --btn-primary-sh: 0 8px 24px rgba(0,0,0,0.18);
  --btn-sec-border: rgba(0,0,0,0.22);
  --btn-sec-hover:  rgba(0,0,0,0.05);
  --link-color:    rgba(17,17,17,0.55);
  --link-hover-bg: rgba(0,0,0,0.04);
}

/* ================================================================
   BASE RESET
================================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}
html { scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0 16px 48px;
  font-family: 'Poppins', sans-serif;
  background: var(--bg) var(--bg-grad) fixed;
  color: var(--text);
  transition: background 0.35s ease, color 0.35s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ================================================================
   THEME TOGGLE  (SVG icon via mask-image)
================================================================ */
.toggle-btn {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 0;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0; /* hide any fallback text */
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: var(--transition);
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
  overflow: hidden;
}

/* The SVG icon is rendered by a pseudo-element using mask */
.toggle-btn::before {
  content: '';
  display: block;
  width: 22px;
  height: 22px;
  background: var(--icon-stroke);
  transition: var(--transition);
  /* dark mode → show sun icon */
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='4'/%3E%3Cline x1='12' y1='2' x2='12' y2='4'/%3E%3Cline x1='12' y1='20' x2='12' y2='22'/%3E%3Cline x1='4.22' y1='4.22' x2='5.64' y2='5.64'/%3E%3Cline x1='18.36' y1='18.36' x2='19.78' y2='19.78'/%3E%3Cline x1='2' y1='12' x2='4' y2='12'/%3E%3Cline x1='20' y1='12' x2='22' y2='12'/%3E%3Cline x1='4.22' y1='19.78' x2='5.64' y2='18.36'/%3E%3Cline x1='18.36' y1='5.64' x2='19.78' y2='4.22'/%3E%3C/svg%3E");
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='4'/%3E%3Cline x1='12' y1='2' x2='12' y2='4'/%3E%3Cline x1='12' y1='20' x2='12' y2='22'/%3E%3Cline x1='4.22' y1='4.22' x2='5.64' y2='5.64'/%3E%3Cline x1='18.36' y1='18.36' x2='19.78' y2='19.78'/%3E%3Cline x1='2' y1='12' x2='4' y2='12'/%3E%3Cline x1='20' y1='12' x2='22' y2='12'/%3E%3Cline x1='4.22' y1='19.78' x2='5.64' y2='18.36'/%3E%3Cline x1='18.36' y1='5.64' x2='19.78' y2='4.22'/%3E%3C/svg%3E");
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
}

/* light mode → show moon icon */
[data-theme="light"] .toggle-btn::before {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z'/%3E%3C/svg%3E");
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z'/%3E%3C/svg%3E");
}

.toggle-btn:hover {
  transform: scale(1.10) rotate(12deg);
  background: var(--surface-hi);
  border-color: var(--border-strong);
}

/* ================================================================
   TYPOGRAPHY
================================================================ */
.main-title {
  font-size: clamp(1.75rem, 7.5vw, 2.5rem);
  margin-top: 88px;
  margin-bottom: 2px;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  letter-spacing: -1.5px;
  line-height: 1.15;
}

.main-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin: 0 0 4px;
  font-weight: 400;
  letter-spacing: 0.3px;
}

/* ================================================================
   MAIN CARD
================================================================ */
.card {
  width: 100%;
  max-width: 448px;
  margin: 22px auto 56px;
  padding: 32px 30px 28px;
  border-radius: var(--radius-card);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  gap: 0;                   /* managed per-element via margin */
  animation: slideUp 0.45s ease-out both;
}

/* ================================================================
   FORM INPUTS
================================================================ */
input[type="text"] {
  width: 100%;
  padding: 14px 18px;
  border-radius: var(--radius-input);
  border: 1.5px solid var(--border-strong);
  background: var(--input-bg);
  color: var(--input-text);
  margin-bottom: 16px;
  font-size: 14px;
  font-family: 'Poppins', sans-serif;
  transition: var(--transition);
  outline: none;
}

input[type="text"]::placeholder { color: var(--text-muted); }

input[type="text"]:focus {
  border-color: var(--text);
  box-shadow: 0 0 0 3px rgba(128,128,128,0.12);
}

/* ================================================================
   SECTION DIVIDER (visual separator between areas)
================================================================ */
.section-sep {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 18px 0;
  border: none;
}

/* ================================================================
   FILE UPLOAD
================================================================ */
.file-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 24px 20px;
  background: var(--file-bg);
  border: 1.5px dashed var(--file-border);
  border-radius: 16px;
  cursor: pointer;
  margin-bottom: 16px;
  color: var(--text);
  transition: var(--transition);
}

/* Upload SVG icon via mask */
.file-label::before {
  content: '';
  display: block;
  width: 28px;
  height: 28px;
  background: var(--text-muted);
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/%3E%3Cpolyline points='17 8 12 3 7 8'/%3E%3Cline x1='12' y1='3' x2='12' y2='15'/%3E%3C/svg%3E");
  mask-size: contain;
  mask-repeat: no-repeat;
  mask-position: center;
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/%3E%3Cpolyline points='17 8 12 3 7 8'/%3E%3Cline x1='12' y1='3' x2='12' y2='15'/%3E%3C/svg%3E");
  -webkit-mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-position: center;
  transition: var(--transition);
}

.file-label:hover {
  background: var(--surface-hi);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.file-label:hover::before { background: var(--text); }

.file-label input { display: none; }

.file-label span {
  font-weight: 500;
  font-size: 13px;
  color: var(--text-muted);
}

.file-label.has-file span {
  color: var(--text);
  font-weight: 600;
}

/* ================================================================
   BUTTONS  — SVG icons injected by JS via .btn-icon child
================================================================ */
.btn, .btn-secondary, .switch-page {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  width: 100%;
  padding: 14px 20px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 14px;
  font-family: 'Poppins', sans-serif;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  border: none;
  letter-spacing: 0.1px;
  position: relative;
  overflow: hidden;
}

/* spacing between consecutive buttons */
.btn + .btn,
.btn + .btn-secondary,
.btn-secondary + .btn,
.btn-secondary + .btn-secondary {
  margin-top: 10px;
}

/* Ripple layer */
.btn::after, .btn-secondary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity 0.2s;
  border-radius: inherit;
}
.btn:active::after, .btn-secondary:active::after { opacity: 1; }

/* Primary */
.btn {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  box-shadow: var(--btn-primary-sh);
  margin-bottom: 0;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(0,0,0,0.22);
  filter: brightness(1.06);
}
.btn:active { transform: translateY(0); }

/* Secondary / outline */
.btn-secondary {
  background: transparent;
  border: 1.5px solid var(--btn-sec-border);
  color: var(--text);
  margin-bottom: 0;
}
.btn-secondary:hover {
  background: var(--btn-sec-hover);
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

/* Navigation link */
.switch-page {
  background: transparent;
  color: var(--link-color);
  font-size: 13px;
  font-weight: 500;
  margin-top: 16px;
  margin-bottom: 0;
  border: 1px solid transparent;
  padding: 10px 16px;
}
.switch-page:hover {
  color: var(--text);
  background: var(--link-hover-bg);
  border-color: var(--border);
  transform: none;
}

/* Inline SVG icon inside buttons */
.btn-icon {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}
.btn-icon svg {
  display: block;
}

/* ================================================================
   QR OUTPUT  — tight, clean spacing
================================================================ */
#qrOutput {
  display: flex;
  justify-content: center;
  /* Only takes space when it has content */
  min-height: 0;
}

#qrOutput:empty {
  display: none;
}

#qrOutput canvas,
#qrOutput img {
  width: 100% !important;
  max-width: 240px !important;
  height: auto !important;
  border-radius: 16px;
  padding: 14px;
  background: #fff;
  box-shadow: 0 8px 32px rgba(0,0,0,0.16), 0 0 0 1px rgba(0,0,0,0.06);
  display: block;
  animation: popIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

/* Download button appears right below the QR */
#downloadBtn {
  margin-top: 14px;
}

/* ================================================================
   SPINNER  — hidden by default, no margin when hidden
================================================================ */
.spinner {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  margin: 16px auto;
  border: 3px solid var(--spinner-track);
  border-top-color: var(--spinner-head);
  animation: spin 0.85s linear infinite;
  flex-shrink: 0;
}
.spinner.active { display: block; }

/* ================================================================
   DECODED RESULT BOX
================================================================ */
.decoded-box {
  padding: 16px 18px;
  background: var(--decoded-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border-strong);
  border-radius: 14px;
  margin-top: 16px;
  margin-bottom: 14px;
  text-align: left;
  max-height: 210px;
  overflow-y: auto;
}

.decoded-title {
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 7px;
}

#decodedText {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  word-break: break-all;
  color: var(--text);
}

/* Success state */
.decoded-box.success {
  border-left-color: var(--success-border);
  background: var(--success-bg);
}

/* Copy button spacing */
#copyBtn {
  margin-bottom: 10px;
}

/* ================================================================
   CAMERA / VIDEO
================================================================ */
.camera-wrapper {
  position: relative;
  width: 100%;
  margin-top: 12px;
  margin-bottom: 12px;
  display: none;
  border-radius: 18px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  border: 1px solid var(--video-border);
}
.camera-wrapper.active { display: block; }

.camera-wrapper video {
  width: 100%;
  display: block;
  border-radius: 0;
  background: #000;
  max-height: 280px;
  object-fit: cover;
}

/* Animated scan line */
.scan-line {
  position: absolute;
  left: 6%;
  width: 88%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--scan-color), transparent);
  border-radius: 2px;
  animation: scanMove 2.2s ease-in-out infinite;
  pointer-events: none;
  top: 0;
}

/* Corner brackets */
.scan-corners {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.scan-corners::before,
.scan-corners::after {
  content: '';
  position: absolute;
  width: 28px;
  height: 28px;
  border-color: var(--scan-color);
  border-style: solid;
}
.scan-corners::before {
  top: 10px; left: 10px;
  border-width: 2.5px 0 0 2.5px;
  border-radius: 5px 0 0 0;
}
.scan-corners::after {
  bottom: 10px; right: 10px;
  border-width: 0 2.5px 2.5px 0;
  border-radius: 0 0 5px 0;
}

/* Scan status badge */
.scan-badge {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 7px 15px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  margin-top: 10px;
  margin-bottom: 8px;
}
.scan-badge.active { display: flex; }

.scan-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--spinner-head);
  animation: pulse 1.3s ease-in-out infinite;
}

/* ================================================================
   ANIMATIONS
================================================================ */
@keyframes spin     { to { transform: rotate(360deg); } }
@keyframes slideUp  {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes popIn {
  from { opacity: 0; transform: scale(0.88); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes scanMove {
  0%   { top: 4%; }
  50%  { top: 88%; }
  100% { top: 4%; }
}
@keyframes pulse {
  0%, 100% { opacity: 1;   transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.65); }
}

/* ================================================================
   FOOTER
================================================================ */
.site-footer {
  width: 100%;
  max-width: 448px;
  margin: 0 auto 32px;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--border);
  animation: slideUp 0.55s ease-out both;
  animation-delay: 0.1s;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* The "09" wordmark badge */
.footer-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.5px;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
}

.footer-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.3px;
}

.footer-tagline {
  font-size: 11.5px;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.2px;
  line-height: 1.5;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-muted);
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-links .sep {
  opacity: 0.35;
  user-select: none;
}

.footer-copy {
  font-size: 10.5px;
  color: var(--text-muted);
  opacity: 0.55;
  text-align: center;
}

/* ================================================================
   RESPONSIVE
================================================================ */
@media (max-width: 480px) {
  .card {
    padding: 24px 18px 20px;
    margin-top: 12px;
    border-radius: 20px;
  }
  .main-title { margin-top: 74px; }
  .toggle-btn { top: 14px; right: 14px; width: 42px; height: 42px; }
  .btn, .btn-secondary { font-size: 13.5px; padding: 13px 18px; }
  .file-label { padding: 20px 16px; }
  #qrOutput canvas, #qrOutput img { max-width: 200px !important; }
}

/* ================================================================
   REDUCED MOTION
================================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}