/* =============================================
   CoreDoc — Google Antigravity Theme
   Netlify Static Version
   ============================================= */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --google-blue:   #4285F4;
  --google-red:    #EA4335;
  --google-yellow: #FBBC05;
  --google-green:  #34A853;
  --bg:            #0a0a1a;
  --surface:       rgba(255,255,255,0.045);
  --surface-hover: rgba(255,255,255,0.08);
  --border:        rgba(255,255,255,0.09);
  --text:          #e8eaed;
  --muted:         rgba(232,234,237,0.55);
  --font:          'Google Sans', 'Inter', sans-serif;
  --radius:        18px;
  --radius-sm:     10px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ── Sparkle Canvas ── */
#sparkle-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* ── Floating Orbs ── */
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.16;
  pointer-events: none;
  z-index: 0;
  animation: orbDrift 22s ease-in-out infinite;
}
.orb-blue   { width: 520px; height: 520px; background: var(--google-blue);   top: -10%; left: -8%;  animation-delay: 0s;   animation-duration: 22s; }
.orb-red    { width: 440px; height: 440px; background: var(--google-red);    top: 40%;  right: -5%; animation-delay: -7s;  animation-duration: 18s; }
.orb-yellow { width: 380px; height: 380px; background: var(--google-yellow); bottom: 5%; left: 20%; animation-delay: -12s; animation-duration: 24s; }
.orb-green  { width: 480px; height: 480px; background: var(--google-green);  top: 10%; right: 10%;  animation-delay: -5s;  animation-duration: 26s; }

@keyframes orbDrift {
  0%, 100% { transform: translate(0, 0)    scale(1); }
  25%       { transform: translate(30px, -40px) scale(1.05); }
  50%       { transform: translate(-20px, 20px) scale(0.95); }
  75%       { transform: translate(15px, 35px)  scale(1.02); }
}

/* ── Particles ── */
#particle-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.particle {
  position: absolute;
  border-radius: 50%;
  animation: particleRise linear infinite;
  opacity: 0;
}
@keyframes particleRise {
  0%   { transform: translateY(0) scale(1);   opacity: 0; }
  10%  { opacity: 0.7; }
  90%  { opacity: 0.3; }
  100% { transform: translateY(-110vh) scale(0.3); opacity: 0; }
}

/* ── Main App ── */
#app {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* ─────────────────────────────────────
   Hero Header
───────────────────────────────────── */
.hero-header {
  text-align: center;
  padding: 60px 0 48px;
}

.logo {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 3px;
  font-size: clamp(3.2rem, 11vw, 7.5rem);
  font-weight: 700;
  letter-spacing: -2px;
  line-height: 1;
  margin-bottom: 22px;
  user-select: none;
}

.main-logo-img {
  max-width: 300px;
  max-height: 120px;
  width: auto;
  height: auto;
  object-fit: contain;
  transition: transform 0.3s ease;
  filter: drop-shadow(0 4px 20px rgba(66,133,244,0.4));
}
.main-logo-img:hover {
  transform: scale(1.05);
}

.tagline {
  font-size: clamp(1rem, 3vw, 1.3rem);
  color: var(--muted);
  font-weight: 400;
  margin-bottom: 28px;
  letter-spacing: 0.2px;
}

.hero-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}
.badge {
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
  border: 1px solid;
  backdrop-filter: blur(10px);
  letter-spacing: 0.3px;
}
.badge-blue   { color: var(--google-blue);   border-color: rgba(66,133,244,0.35); background: rgba(66,133,244,0.1); }
.badge-green  { color: var(--google-green);  border-color: rgba(52,168,83,0.35);  background: rgba(52,168,83,0.1); }
.badge-yellow { color: var(--google-yellow); border-color: rgba(251,188,5,0.35);  background: rgba(251,188,5,0.1); }
.badge-red    { color: var(--google-red);    border-color: rgba(234,67,53,0.35);  background: rgba(234,67,53,0.1); }

/* ─────────────────────────────────────
   Mode Tabs
───────────────────────────────────── */
.mode-tabs {
  display: flex;
  gap: 16px;
  margin-bottom: 36px;
  justify-content: center;
  flex-wrap: wrap;
}

.mode-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 18px 44px;
  border-radius: 20px;
  border: 2px solid var(--border);
  background: var(--surface);
  backdrop-filter: blur(14px);
  cursor: pointer;
  font-family: var(--font);
  color: var(--muted);
  transition: all 0.3s ease;
  min-width: 210px;
  position: relative;
  overflow: hidden;
}
.mode-tab::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.3s;
}
.mode-tab[data-mode="svg"]::before  { background: radial-gradient(ellipse at center, rgba(66,133,244,0.15) 0%, transparent 70%); }
.mode-tab[data-mode="pdf"]::before  { background: radial-gradient(ellipse at center, rgba(234,67,53,0.15) 0%, transparent 70%); }

.mode-tab:hover { transform: translateY(-3px); }
.mode-tab:hover::before { opacity: 1; }

.mode-tab.active[data-mode="svg"] {
  border-color: var(--google-blue);
  background: rgba(66,133,244,0.1);
  color: var(--text);
  box-shadow: 0 0 0 4px rgba(66,133,244,0.12), 0 14px 40px rgba(66,133,244,0.2);
}
.mode-tab.active[data-mode="pdf"] {
  border-color: var(--google-red);
  background: rgba(234,67,53,0.1);
  color: var(--text);
  box-shadow: 0 0 0 4px rgba(234,67,53,0.12), 0 14px 40px rgba(234,67,53,0.2);
}
.mode-tab.active::before { opacity: 1; }

.tab-icon  { font-size: 2rem; }
.tab-label { font-size: 1.05rem; font-weight: 700; }
.tab-desc  { font-size: 0.78rem; color: var(--muted); }

/* ─────────────────────────────────────
   Upload Zone
───────────────────────────────────── */
.upload-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.upload-zone {
  width: 100%;
  border: 2px dashed var(--border);
  border-radius: 24px;
  background: var(--surface);
  backdrop-filter: blur(14px);
  padding: 50px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  transition: border-color 0.3s, background 0.3s, transform 0.2s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}
.upload-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(66,133,244,0.07) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
}
.upload-zone:hover, .upload-zone:focus, .upload-zone.dragover {
  border-color: var(--google-blue);
  background: rgba(66,133,244,0.07);
  box-shadow: 0 0 0 4px rgba(66,133,244,0.12), 0 20px 60px rgba(66,133,244,0.15);
  transform: translateY(-2px);
  outline: none;
}
.upload-zone:hover::before, .upload-zone.dragover::before { opacity: 1; }
.upload-zone.dragover { border-color: var(--google-green); border-style: solid; }

/* PDF upload zone — red theme */
.pdf-upload-zone::before { background: radial-gradient(ellipse at center, rgba(234,67,53,0.07) 0%, transparent 70%); }
.pdf-upload-zone:hover, .pdf-upload-zone:focus, .pdf-upload-zone.dragover {
  border-color: var(--google-red) !important;
  background: rgba(234,67,53,0.07) !important;
  box-shadow: 0 0 0 4px rgba(234,67,53,0.12), 0 20px 60px rgba(234,67,53,0.15) !important;
}

/* Ring icon */
.ring-icon { position: relative; width: 80px; height: 80px; margin-bottom: 4px; }
.ring-svg { width: 80px; height: 80px; animation: ringRotate 3s linear infinite; filter: drop-shadow(0 0 8px rgba(66,133,244,0.5)); }
.ring-svg-red { filter: drop-shadow(0 0 8px rgba(234,67,53,0.5)); }
@keyframes ringRotate { to { transform: rotate(360deg); } }
.ring-track    { fill: none; stroke: rgba(255,255,255,0.08); stroke-width: 6; }
.ring-progress { fill: none; stroke-width: 6; stroke-linecap: round; stroke-dasharray: 80 172; stroke: var(--google-blue); }
.ring-progress-red { stroke: var(--google-red); }
.ring-inner    { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }

.upload-title { font-size: 1.2rem; font-weight: 600; color: var(--text); text-align: center; }
.upload-sub   { font-size: 0.9rem; color: var(--muted); text-align: center; }

.format-badges { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.fmt-badge { padding: 5px 14px; border-radius: 999px; font-size: 0.72rem; font-weight: 700; letter-spacing: 1.5px; }
.fmt-zip  { background: rgba(66,133,244,0.15); color: var(--google-blue);   border: 1px solid rgba(66,133,244,0.3); }
.fmt-pdf  { background: rgba(234,67,53,0.15);  color: var(--google-red);    border: 1px solid rgba(234,67,53,0.3); }
.fmt-png  { background: rgba(66,133,244,0.15); color: var(--google-blue);   border: 1px solid rgba(66,133,244,0.3); }
.fmt-jpg  { background: rgba(234,67,53,0.15);  color: var(--google-red);    border: 1px solid rgba(234,67,53,0.3); }
.fmt-webp { background: rgba(52,168,83,0.15);  color: var(--google-green);  border: 1px solid rgba(52,168,83,0.3); }
.fmt-bmp  { background: rgba(251,188,5,0.15);  color: var(--google-yellow); border: 1px solid rgba(251,188,5,0.3); }

.btn-choose {
  background: linear-gradient(135deg, var(--google-blue), #1a73e8);
  color: #fff;
  border: none;
  padding: 12px 32px;
  border-radius: 999px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px rgba(66,133,244,0.4);
}
.btn-choose:hover  { transform: translateY(-2px) scale(1.03); box-shadow: 0 8px 28px rgba(66,133,244,0.5); }
.btn-choose:active { transform: scale(0.97); }

.btn-choose-red {
  background: linear-gradient(135deg, var(--google-red), #c5221f);
  box-shadow: 0 4px 20px rgba(234,67,53,0.4);
}
.btn-choose-red:hover { box-shadow: 0 8px 28px rgba(234,67,53,0.5); }

#file-input, #pdf-file-input, #pdf-add-input { display: none; }

.upload-limit { font-size: 0.77rem; color: var(--muted); text-align: center; margin-top: 2px; }

.file-info {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(52,168,83,0.1);
  border: 1px solid rgba(52,168,83,0.3);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  width: 100%;
  max-width: 460px;
  animation: fadeUp 0.3s ease;
}
.file-info-icon   { font-size: 1.4rem; }
.file-info-details { flex: 1; display: flex; flex-direction: column; gap: 2px; overflow: hidden; }
.file-name { font-size: 0.92rem; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-size { font-size: 0.78rem; color: var(--google-green); }
.btn-remove { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 1rem; padding: 4px; transition: color 0.2s; }
.btn-remove:hover { color: var(--google-red); }

/* Convert button */
.btn-convert {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #4285F4, #EA4335, #FBBC05, #34A853);
  background-size: 300% 300%;
  animation: gradientShift 4s ease infinite;
  color: #fff;
  border: none;
  padding: 17px 55px;
  border-radius: 999px;
  font-family: var(--font);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.3px;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.3s;
  box-shadow: 0 6px 30px rgba(66,133,244,0.4);
}
.btn-convert:disabled {
  opacity: 0.32;
  cursor: not-allowed;
  animation: none;
  background: rgba(255,255,255,0.08);
}
.btn-convert:not(:disabled):hover  { transform: translateY(-3px) scale(1.04); box-shadow: 0 10px 40px rgba(66,133,244,0.5); }
.btn-convert:not(:disabled):active { transform: scale(0.97); }
.btn-shimmer {
  position: absolute; inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.25) 50%, transparent 60%);
  background-size: 200% 100%;
  animation: shimmerMove 2.5s linear infinite;
}
.btn-convert:disabled .btn-shimmer { display: none; }
@keyframes gradientShift { 0%,100%{background-position:0% 50%}  50%{background-position:100% 50%} }
@keyframes shimmerMove   { 0%{background-position:200% 0} 100%{background-position:-200% 0} }

/* Generate PDF button */
.btn-generate-pdf {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #EA4335, #FBBC05, #34A853, #4285F4);
  background-size: 300% 300%;
  animation: gradientShift 4s ease infinite;
  color: #fff;
  border: none;
  padding: 17px 55px;
  border-radius: 999px;
  font-family: var(--font);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.3px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 6px 30px rgba(234,67,53,0.4);
  margin: 0 auto;
}
.btn-generate-pdf:hover  { transform: translateY(-3px) scale(1.04); box-shadow: 0 10px 40px rgba(234,67,53,0.5); }
.btn-generate-pdf:active { transform: scale(0.97); }
.btn-generate-pdf .btn-shimmer { display: block; }

/* Error */
.error-box, .pdf-error-box {
  display: flex; align-items: center; gap: 10px;
  background: rgba(234,67,53,0.12);
  border: 1px solid rgba(234,67,53,0.35);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  width: 100%; max-width: 620px;
  animation: fadeUp 0.3s ease;
}
.error-icon  { font-size: 1.2rem; }
.error-text  { flex: 1; font-size: 0.9rem; color: #ff6b6b; }
.error-close { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 1rem; padding: 2px 6px; transition: color 0.2s; }
.error-close:hover { color: var(--google-red); }

/* ─────────────────────────────────────
   Progress Section
───────────────────────────────────── */
.progress-section {
  margin-top: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 36px 40px;
  backdrop-filter: blur(14px);
  animation: fadeUp 0.5s ease;
}
.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 28px;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.count-badge {
  background: linear-gradient(135deg, var(--google-blue), var(--google-green));
  color: #fff;
  border-radius: 999px;
  padding: 2px 14px;
  font-size: 0.9rem;
  font-weight: 600;
}

/* Progress bar */
.progress-bar-wrap { margin-bottom: 32px; }
.progress-bar {
  position: relative;
  background: rgba(255,255,255,0.06);
  border-radius: 999px;
  height: 18px;
  overflow: visible;
}
.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--google-blue), var(--google-green), var(--google-yellow), var(--google-red));
  background-size: 200% 100%;
  animation: progressShimmer 2s linear infinite;
  transition: width 0.5s cubic-bezier(0.25,0.8,0.25,1);
  width: 0%;
  box-shadow: 0 0 20px rgba(66,133,244,0.5);
}
.progress-fill-red {
  background: linear-gradient(90deg, var(--google-red), var(--google-yellow), var(--google-green), var(--google-blue));
  box-shadow: 0 0 20px rgba(234,67,53,0.5);
}
@keyframes progressShimmer { 0%{background-position:200% 0} 100%{background-position:0% 0} }
.progress-pct {
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%) translateX(calc(100% + 10px));
  font-size: 0.85rem; font-weight: 700;
  color: var(--text); white-space: nowrap;
}

/* Steps */
.steps-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.step {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: rgba(255,255,255,0.03);
  transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
  font-size: 0.95rem;
  color: var(--muted);
}
.step.active {
  border-color: rgba(66,133,244,0.4);
  background: rgba(66,133,244,0.08);
  color: var(--text);
  box-shadow: 0 0 20px rgba(66,133,244,0.1);
  animation: stepPulse 1.5s ease-in-out infinite;
}
.step.done { border-color: rgba(52,168,83,0.4); background: rgba(52,168,83,0.07); color: var(--google-green); }
.step-ready.done { background: linear-gradient(135deg, rgba(52,168,83,0.12), rgba(66,133,244,0.08)); box-shadow: 0 0 30px rgba(52,168,83,0.2); }
@keyframes stepPulse { 0%,100%{box-shadow:0 0 10px rgba(66,133,244,0.15)} 50%{box-shadow:0 0 30px rgba(66,133,244,0.4)} }
.step-num    { font-size: 1.1rem; width: 28px; text-align: center; flex-shrink: 0; }
.step-label  { flex: 1; font-weight: 500; }
.step-status { font-size: 0.8rem; color: var(--google-green); font-weight: 600; }

/* ─────────────────────────────────────
   Preview Grid
───────────────────────────────────── */
.preview-section { margin-top: 40px; animation: fadeUp 0.5s ease; }
.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 18px;
  margin-top: 20px;
}
.preview-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  animation: cardFloatIn 0.5s ease backwards;
}
@keyframes cardFloatIn { from { opacity:0; transform:translateY(30px); } to { opacity:1; transform:translateY(0); } }
.preview-card:hover { transform: translateY(-6px) scale(1.02); border-color: rgba(66,133,244,0.4); box-shadow: 0 14px 40px rgba(66,133,244,0.2); }
.card-thumb {
  width: 100%; aspect-ratio: 4/3;
  background: rgba(255,255,255,0.03);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; position: relative;
}
.card-thumb img { max-width: 100%; max-height: 100%; object-fit: contain; display: block; }
.card-badge-svg {
  position: absolute; top: 8px; right: 8px;
  background: rgba(52,168,83,0.9); color: #fff;
  font-size: 0.65rem; font-weight: 700;
  padding: 3px 8px; border-radius: 999px;
}
.card-info { padding: 12px 14px; }
.card-filename { font-size: 0.82rem; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 5px; }
.card-sizes    { font-size: 0.72rem; color: var(--muted); display: flex; align-items: center; gap: 5px; }
.card-arrow    { color: var(--google-green); }
.card-dims     { font-size: 0.7rem; color: rgba(232,234,237,0.35); margin-top: 3px; }

/* ─────────────────────────────────────
   Download Section
───────────────────────────────────── */
.download-section { margin-top: 40px; display: flex; flex-direction: column; align-items: center; gap: 24px; animation: fadeUp 0.5s ease; }
.download-stats {
  display: flex; align-items: center; gap: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 44px;
  backdrop-filter: blur(12px);
}
.stat { text-align: center; }
.stat-num { display: block; font-size: 2rem; font-weight: 700; background: linear-gradient(135deg, var(--google-blue), var(--google-green)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 0.8rem; color: var(--muted); margin-top: 2px; }
.stat-divider { width: 1px; height: 48px; background: var(--border); }

/* Download button */
.btn-download { position: relative; border: none; background: none; cursor: pointer; padding: 0; border-radius: 999px; font-family: var(--font); }
.btn-dl-border {
  position: absolute; inset: -2px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--google-blue), var(--google-red), var(--google-yellow), var(--google-green));
  background-size: 300% 300%;
  animation: gradientShift 3s ease infinite;
  z-index: 0;
}
.btn-dl-border-red {
  background: linear-gradient(135deg, var(--google-red), var(--google-yellow), var(--google-green), var(--google-blue));
}
.btn-dl-glow {
  position: absolute; inset: -10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--google-blue), var(--google-green));
  opacity: 0;
  filter: blur(22px);
  z-index: -1;
  animation: glowPulse 2s ease-in-out infinite;
}
.btn-dl-glow-red {
  background: linear-gradient(135deg, var(--google-red), var(--google-yellow));
}
@keyframes glowPulse { 0%,100%{opacity:0.3} 50%{opacity:0.7} }
.btn-dl-inner {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 10px;
  background: var(--bg);
  color: var(--text);
  padding: 18px 52px;
  border-radius: 999px;
  font-size: 1.15rem; font-weight: 700;
  margin: 2px;
  transition: background 0.3s;
}
.btn-download:hover .btn-dl-inner { background: rgba(10,10,26,0.6); }
.btn-download:hover .btn-dl-glow  { opacity: 0.7; }
.btn-download:active { transform: scale(0.97); }

.btn-reset {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 10px 28px;
  border-radius: 999px;
  font-family: var(--font);
  font-size: 0.9rem;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.btn-reset:hover { color: var(--text); border-color: var(--google-blue); background: rgba(66,133,244,0.06); }

/* ─────────────────────────────────────
   PDF Editor Section
───────────────────────────────────── */
.pdf-editor-section {
  margin-top: 32px;
  animation: fadeUp 0.5s ease;
}

.pdf-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 10px;
}

.pdf-editor-header .section-title { margin-bottom: 0; }

.pdf-editor-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.editor-action-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  backdrop-filter: blur(10px);
}
.editor-action-btn:hover { color: var(--text); border-color: var(--google-blue); background: rgba(66,133,244,0.08); }

.pdf-editor-hint {
  font-size: 0.78rem;
  color: var(--muted);
  text-align: center;
  margin-bottom: 20px;
  padding: 8px 16px;
  background: rgba(251,188,5,0.06);
  border: 1px solid rgba(251,188,5,0.2);
  border-radius: 999px;
}

.pdf-pages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  min-height: 80px;
  padding: 8px 0 20px;
}

/* PDF Page Card */
.pdf-page-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  cursor: grab;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s, opacity 0.2s;
  animation: cardFloatIn 0.35s ease backwards;
  position: relative;
  user-select: none;
}
.pdf-page-card:hover { transform: translateY(-5px); border-color: rgba(234,67,53,0.5); box-shadow: 0 12px 36px rgba(234,67,53,0.18); }
.pdf-page-card.dragging { opacity: 0.4; cursor: grabbing; transform: scale(0.97); }
.pdf-page-card.drag-over { border-color: var(--google-yellow) !important; box-shadow: 0 0 0 3px rgba(251,188,5,0.3) !important; transform: scale(1.04); }

.pdf-page-thumb {
  width: 100%;
  aspect-ratio: 3/4;
  background: rgba(255,255,255,0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}
.pdf-page-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.pdf-page-card:hover .pdf-page-thumb img { transform: scale(1.04); }

.pdf-page-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(10,10,26,0.85) 100%);
  opacity: 0;
  transition: opacity 0.25s;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 8px;
  padding-bottom: 10px;
}
.pdf-page-card:hover .pdf-page-overlay { opacity: 1; }

.pdf-page-action {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  backdrop-filter: blur(8px);
}
.pdf-page-action:hover { background: rgba(255,255,255,0.24); transform: scale(1.1); }
.pdf-page-action.view:hover   { background: rgba(251,188,5,0.6); }
.pdf-page-action.delete:hover { background: rgba(234,67,53,0.6); }
.pdf-page-action.rotate-cw:hover  { background: rgba(66,133,244,0.6); }
.pdf-page-action.rotate-ccw:hover { background: rgba(52,168,83,0.6); }

.pdf-page-info {
  padding: 8px 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.pdf-page-num {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--google-red);
}
.pdf-page-name {
  font-size: 0.65rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 90px;
}
.pdf-page-rotate-badge {
  position: absolute;
  top: 6px;
  left: 6px;
  background: rgba(66,133,244,0.7);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 999px;
  pointer-events: none;
}

/* ─────────────────────────────────────
   PDF Controls / Settings
───────────────────────────────────── */
.pdf-controls-section {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  animation: fadeUp 0.5s ease;
}

.pdf-settings-card {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px 32px;
  backdrop-filter: blur(14px);
}

.pdf-settings-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}

.pdf-settings-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

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

.pdf-setting-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.pdf-setting-select {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.88rem;
  padding: 8px 12px;
  cursor: pointer;
  transition: border-color 0.2s;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23888' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 30px;
}
.pdf-setting-select:focus { outline: none; border-color: var(--google-red); }
.pdf-setting-select option { background: #1e1e2e; color: var(--text); }

.pdf-filename-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.pdf-filename-input-wrap {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex: 1;
  min-width: 200px;
  transition: border-color 0.2s;
}
.pdf-filename-input-wrap:focus-within { border-color: var(--google-red); }
.pdf-filename-input {
  flex: 1;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.88rem;
  padding: 8px 12px;
  outline: none;
}
.pdf-filename-ext {
  padding: 8px 12px 8px 0;
  font-size: 0.85rem;
  color: var(--google-red);
  font-weight: 700;
}

/* ─────────────────────────────────────
   Image Preview Modal
───────────────────────────────────── */
.preview-modal {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 26, 0.9);
  backdrop-filter: blur(10px);
  animation: fadeIn 0.2s ease;
}
.preview-modal[hidden] {
  display: none !important;
}
.preview-modal-header {
  position: absolute;
  top: 0; left: 0; width: 100%;
  padding: 24px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10002;
  background: linear-gradient(to bottom, rgba(10,10,26,0.8) 0%, transparent 100%);
  pointer-events: none;
}
.preview-modal-title {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 600;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}
.preview-modal-close {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  pointer-events: auto;
}
.preview-modal-close:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: scale(1.1);
}
.preview-modal-content {
  max-width: 90vw;
  max-height: 90vh;
  position: relative;
}
.preview-modal-content img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 10px 50px rgba(0,0,0,0.5);
  transition: transform 0.3s ease;
}
.preview-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: white;
  width: 50px; height: 50px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 10001;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
  backdrop-filter: blur(4px);
}
.preview-nav-btn:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-50%) scale(1.1);
}
.preview-nav-btn.prev { left: 40px; }
.preview-nav-btn.next { right: 40px; }

/* ─────────────────────────────────────
   SEO / Feature Content Section
───────────────────────────────────── */
.seo-section {
  max-width: 1000px;
  margin: 60px auto 40px;
  padding: 0 20px;
  text-align: center;
}
.seo-heading {
  font-size: 1.8rem;
  color: #fff;
  margin-bottom: 30px;
  font-weight: 700;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}
.seo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  text-align: left;
}
.seo-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 24px;
  transition: transform 0.3s, background 0.3s;
}
.seo-card:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-5px);
}
.seo-card h3 {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 12px;
  font-weight: 600;
}
.seo-card p, .seo-card strong {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
  font-weight: normal;
}
.seo-card strong {
  color: #ddd;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ─────────────────────────────────────
   Footer
───────────────────────────────────── */
.app-footer { position: relative; z-index: 1; text-align: center; padding: 24px; font-size: 0.82rem; color: var(--muted); }
.footer-heart { color: var(--google-red); }

/* Confetti */
.confetti-dot {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  animation: confettiBurst 0.9s ease-out forwards;
}
@keyframes confettiBurst {
  0%   { transform: translate(0,0) scale(1);                      opacity: 1; }
  100% { transform: translate(var(--dx), var(--dy)) scale(0);     opacity: 0; }
}

/* Utilities */
@keyframes fadeUp { from { opacity:0; transform:translateY(24px); } to { opacity:1; transform:translateY(0); } }
[hidden] { display: none !important; }

/* Responsive */
@media (max-width: 700px) {
  .logo { font-size: 3rem; gap: 1px; letter-spacing: -1px; }
  .progress-section  { padding: 24px 20px; }
  .download-stats    { padding: 16px 24px; gap: 20px; }
  .btn-dl-inner      { padding: 14px 32px; font-size: 1rem; }
  .preview-grid      { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
  .upload-zone       { padding: 36px 20px; }
  .hero-header       { padding: 40px 0 36px; }
  .mode-tabs         { flex-direction: column; align-items: stretch; }
  .mode-tab          { min-width: unset; flex-direction: row; padding: 14px 20px; }
  .tab-icon          { font-size: 1.5rem; }
  .pdf-settings-row  { grid-template-columns: 1fr 1fr; }
  .pdf-editor-header { flex-direction: column; align-items: flex-start; }
  .pdf-pages-grid    { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
}