/* ============================================================
   PixelFold — Image to PDF Converter
   Design: Dark Luxury / Editorial Precision
   ============================================================ */

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

:root {
  --bg:        #0a0a0f;
  --bg2:       #10101a;
  --surface:   #14141f;
  --surface2:  #1c1c2e;
  --border:    rgba(255,255,255,0.08);
  --border2:   rgba(255,255,255,0.14);
  --accent:    #c8a96e;
  --accent2:   #e8c98e;
  --accent-glow: rgba(200,169,110,0.25);
  --text:      #f0ede8;
  --text2:     #a09a90;
  --text3:     #605a52;
  --danger:    #e07070;
  --success:   #70c090;
  --font-head: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Outfit', system-ui, sans-serif;
  --font-mono: 'DM Mono', monospace;
  --r:         12px;
  --r2:        20px;
  --shadow:    0 24px 64px rgba(0,0,0,0.6);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 15px;
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Animated Background ── */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.18;
  animation: float 18s ease-in-out infinite;
}
.orb-1 { width: 600px; height: 600px; background: radial-gradient(circle, #c8a96e, transparent); top: -200px; left: -100px; animation-duration: 20s; }
.orb-2 { width: 500px; height: 500px; background: radial-gradient(circle, #6e8ac8, transparent); bottom: 0; right: -100px; animation-duration: 25s; animation-delay: -8s; }
.orb-3 { width: 400px; height: 400px; background: radial-gradient(circle, #c86e8a, transparent); top: 50%; left: 50%; transform: translate(-50%,-50%); animation-duration: 22s; animation-delay: -4s; }

@keyframes float {
  0%,100% { transform: translate(0,0) scale(1); }
  33%      { transform: translate(40px,-30px) scale(1.05); }
  66%      { transform: translate(-20px,20px) scale(0.95); }
}

.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ── All content above bg ── */
header, section, main, footer { position: relative; z-index: 1; }

/* ── Header ── */
.site-header {
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px);
  background: rgba(10,10,15,0.6);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: 1280px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  font-size: 22px;
  color: var(--accent);
  animation: spin-slow 8s linear infinite;
}
@keyframes spin-slow { to { transform: rotate(360deg); } }
.logo-text {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text);
}
.nav-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  background: rgba(200,169,110,0.1);
  border: 1px solid rgba(200,169,110,0.25);
  padding: 4px 12px;
  border-radius: 100px;
  letter-spacing: 0.08em;
}

/* ── Hero ── */
.hero {
  padding: 80px 40px 40px;
  text-align: center;
}
.hero-inner { max-width: 760px; margin: auto; }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
  opacity: 0;
  animation: fade-up 0.8s 0.2s ease forwards;
}
.hero-title {
  font-family: var(--font-head);
  font-size: clamp(52px, 9vw, 96px);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 28px;
  opacity: 0;
  animation: fade-up 0.8s 0.35s ease forwards;
}
.hero-title em {
  font-style: italic;
  color: var(--accent);
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 16px;
  color: var(--text2);
  max-width: 560px;
  margin: 0 auto;
  opacity: 0;
  animation: fade-up 0.8s 0.5s ease forwards;
}

@keyframes fade-up {
  from { opacity:0; transform: translateY(20px); }
  to   { opacity:1; transform: translateY(0); }
}

/* ── App Wrapper ── */
.app-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 40px 80px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ── Upload Zone ── */
.upload-zone {
  border: 1.5px dashed var(--border2);
  border-radius: var(--r2);
  padding: 70px 40px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background: rgba(255,255,255,0.02);
  position: relative;
  overflow: hidden;
}
.upload-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, var(--accent-glow), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s;
}
.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(200,169,110,0.04);
}
.upload-zone:hover::before,
.upload-zone.drag-over::before { opacity: 1; }

.upload-zone-inner { position: relative; z-index: 1; }

.upload-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(200,169,110,0.08);
  border: 1px solid rgba(200,169,110,0.2);
  margin-bottom: 24px;
  color: var(--accent);
  transition: transform 0.3s;
}
.upload-zone:hover .upload-icon-wrap { transform: scale(1.08) translateY(-3px); }
.upload-icon { width: 40px; height: 40px; }

.upload-title {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 400;
  margin-bottom: 8px;
}
.upload-sub {
  color: var(--text2);
  font-size: 14px;
  margin-bottom: 16px;
}
.upload-formats {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text3);
  letter-spacing: 0.1em;
  margin-bottom: 28px;
}

.upload-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #0a0a0f;
  border-radius: 100px;
  font-weight: 500;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.25s;
  letter-spacing: 0.04em;
  box-shadow: 0 8px 30px rgba(200,169,110,0.35);
}
.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(200,169,110,0.5);
}

/* ── Controls Bar ── */
.controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 16px 24px;
  flex-wrap: wrap;
}
.controls-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.count-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  background: rgba(200,169,110,0.1);
  color: var(--accent);
  border: 1px solid rgba(200,169,110,0.25);
  border-radius: 100px;
  padding: 4px 14px;
}
.ctrl-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 8px;
  border: 1px solid var(--border2);
  background: transparent;
  color: var(--text2);
  font-size: 12px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.2s;
}
.ctrl-btn:hover { background: var(--surface2); color: var(--text); border-color: var(--border2); }
.ctrl-btn.ctrl-danger:hover { color: var(--danger); border-color: rgba(224,112,112,0.4); background: rgba(224,112,112,0.06); }

.controls-right { flex: 1; display: flex; justify-content: flex-end; }
.pdf-options {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.opt-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.opt-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.opt-select {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12px;
  font-family: var(--font-body);
  cursor: pointer;
  outline: none;
  transition: border-color 0.2s;
  appearance: none;
  -webkit-appearance: none;
  padding-right: 24px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' fill='none'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23a09a90' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}
.opt-select:focus { border-color: var(--accent); }

/* ── Image Grid ── */
.image-grid-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: 28px;
}
.grid-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.grid-title {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 400;
}
.grid-hint {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 300;
  color: var(--text3);
}
.sort-btns {
  display: flex;
  gap: 8px;
}
.sort-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 5px 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text2);
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.06em;
}
.sort-btn:hover { background: var(--surface2); color: var(--text); }

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
}

/* ── Image Card ── */
.img-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  cursor: grab;
  transition: all 0.25s;
  position: relative;
  animation: card-in 0.35s ease both;
}
@keyframes card-in {
  from { opacity:0; transform: scale(0.9) translateY(10px); }
  to   { opacity:1; transform: scale(1) translateY(0); }
}
.img-card:active { cursor: grabbing; }
.img-card:hover { border-color: var(--border2); transform: translateY(-3px); box-shadow: var(--shadow); }
.img-card.dragging { opacity: 0.4; transform: scale(0.95); }
.img-card.drag-over-card { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-glow); }

.img-card-thumb {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
  background: var(--bg);
}
.img-card-info {
  padding: 10px 12px;
}
.img-card-num {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  margin-bottom: 2px;
  letter-spacing: 0.06em;
}
.img-card-name {
  font-size: 11px;
  color: var(--text2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.img-card-size {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text3);
}
.img-card-actions {
  position: absolute;
  top: 0;
  right: 0;
  display: flex;
  gap: 4px;
  padding: 6px;
  opacity: 0;
  transition: opacity 0.2s;
}
.img-card:hover .img-card-actions { opacity: 1; }
.card-action-btn {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  transition: all 0.15s;
}
.card-preview-btn { background: rgba(10,10,15,0.8); color: var(--text); }
.card-remove-btn  { background: rgba(224,112,112,0.8); color: white; }
.card-action-btn:hover { transform: scale(1.1); }

/* ── Convert Section ── */
.convert-section {
  background: linear-gradient(135deg, rgba(200,169,110,0.06), rgba(200,169,110,0.02));
  border: 1px solid rgba(200,169,110,0.2);
  border-radius: var(--r2);
  padding: 36px 40px;
}
.convert-inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.pdf-name-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
}
.pdf-name-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.pdf-name-input {
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--text);
  border-radius: 10px;
  padding: 12px 60px 12px 16px;
  font-size: 15px;
  font-family: var(--font-body);
  outline: none;
  transition: border-color 0.2s;
  min-width: 280px;
}
.pdf-name-input:focus { border-color: var(--accent); }
.pdf-ext {
  position: absolute;
  right: 14px;
  bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text3);
}

.convert-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 48px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #0a0a0f;
  border: none;
  border-radius: 100px;
  font-weight: 600;
  font-size: 14px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 8px 30px rgba(200,169,110,0.4);
  letter-spacing: 0.04em;
  white-space: nowrap;
  min-width: 200px;
}
.convert-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(200,169,110,0.6);
}
.convert-btn:active { transform: translateY(0); }
.convert-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.convert-btn-text { display: flex; align-items: center; gap: 10px; }
.convert-btn-loader { display: flex; align-items: center; gap: 10px; }

.spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(10,10,15,0.4);
  border-top-color: #0a0a0f;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Progress ── */
.progress-section { animation: fade-up 0.4s ease; }
.progress-card {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  padding: 32px 40px;
}
.progress-icon {
  font-size: 32px;
  animation: spin 1.5s linear infinite;
  color: var(--accent);
  flex-shrink: 0;
}
.progress-info { flex: 1; }
.progress-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text2);
  margin-bottom: 12px;
}
.progress-bar-wrap {
  background: var(--surface2);
  border-radius: 100px;
  height: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}
.progress-bar {
  height: 100%;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  width: 0%;
  transition: width 0.4s ease;
  box-shadow: 0 0 12px var(--accent-glow);
}
.progress-pct {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
}

/* ── Result ── */
.result-section { animation: fade-up 0.4s ease; }
.result-card {
  display: flex;
  align-items: center;
  gap: 24px;
  background: linear-gradient(135deg, rgba(112,192,144,0.06), rgba(112,192,144,0.02));
  border: 1px solid rgba(112,192,144,0.25);
  border-radius: var(--r2);
  padding: 32px 40px;
  flex-wrap: wrap;
}
.result-check {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(112,192,144,0.12);
  border: 1px solid rgba(112,192,144,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--success);
  flex-shrink: 0;
  animation: pop 0.4s cubic-bezier(0.34,1.56,0.64,1);
}
@keyframes pop {
  from { transform: scale(0); }
  to   { transform: scale(1); }
}
.result-info { flex: 1; min-width: 180px; }
.result-title {
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 400;
  color: var(--success);
  margin-bottom: 4px;
}
.result-sub { color: var(--text2); font-size: 13px; }

.result-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  background: linear-gradient(135deg, #70c090, #90d0a8);
  color: #0a0a0f;
  border-radius: 100px;
  text-decoration: none;
  font-weight: 600;
  font-size: 13px;
  transition: all 0.25s;
  box-shadow: 0 6px 24px rgba(112,192,144,0.35);
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(112,192,144,0.5); }

.reset-btn {
  padding: 12px 24px;
  border-radius: 100px;
  border: 1px solid var(--border2);
  background: transparent;
  color: var(--text2);
  font-size: 13px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.2s;
}
.reset-btn:hover { background: var(--surface2); color: var(--text); }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(8px);
  animation: fade-in 0.2s ease;
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
.modal-card {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--r2);
  padding: 24px;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  position: relative;
  animation: scale-in 0.25s cubic-bezier(0.34,1.56,0.64,1);
}
@keyframes scale-in { from { transform: scale(0.85); } to { transform: scale(1); } }
.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text2);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.modal-close:hover { color: var(--text); border-color: var(--border2); }
.modal-img {
  max-width: 80vw;
  max-height: 70vh;
  object-fit: contain;
  border-radius: var(--r);
}
.modal-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text3);
  letter-spacing: 0.06em;
}

/* ── Footer ── */
.site-footer {
  text-align: center;
  padding: 28px 40px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text3);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  position: relative;
  z-index: 1;
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 12px;
  padding: 14px 20px;
  font-size: 13px;
  z-index: 9999;
  max-width: 320px;
  box-shadow: var(--shadow);
  animation: toast-in 0.35s cubic-bezier(0.34,1.56,0.64,1);
  display: flex;
  align-items: center;
  gap: 10px;
}
.toast.success { border-color: rgba(112,192,144,0.4); color: var(--success); }
.toast.error   { border-color: rgba(224,112,112,0.4); color: var(--danger); }
.toast.info    { border-color: rgba(200,169,110,0.4); color: var(--accent); }
@keyframes toast-in {
  from { opacity:0; transform: translateX(20px) scale(0.9); }
  to   { opacity:1; transform: translateX(0) scale(1); }
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--surface2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }

/* ═══════════════════════════════════════
   RESPONSIVE — Tablet
═══════════════════════════════════════ */
@media (max-width: 900px) {
  .site-header { padding: 16px 24px; }
  .hero { padding: 60px 24px 30px; }
  .app-wrapper { padding: 16px 24px 60px; }
  .controls-bar { flex-direction: column; align-items: flex-start; }
  .controls-right { width: 100%; }
  .pdf-options { justify-content: flex-start; }
  .image-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
  .convert-inner { flex-direction: column; }
  .pdf-name-input { min-width: 0; width: 100%; }
  .convert-btn { width: 100%; }
}

/* ═══════════════════════════════════════
   RESPONSIVE — Mobile
═══════════════════════════════════════ */
@media (max-width: 600px) {
  .site-header { padding: 14px 18px; }
  .logo-text { font-size: 18px; }
  .hero { padding: 40px 18px 24px; }
  .hero-title { font-size: clamp(40px, 13vw, 62px); }
  .hero-sub { font-size: 14px; }
  .app-wrapper { padding: 14px 18px 50px; gap: 18px; }
  .upload-zone { padding: 50px 20px; }
  .upload-title { font-size: 22px; }
  .image-grid-wrapper { padding: 20px; }
  .image-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px; }
  .progress-card, .result-card { padding: 24px 20px; gap: 16px; }
  .result-actions { flex-direction: column; width: 100%; }
  .download-btn, .reset-btn { width: 100%; justify-content: center; text-align: center; }
  .pdf-options { gap: 10px; }
  .opt-group { min-width: calc(50% - 5px); }
  .opt-select { width: 100%; }
  .convert-section { padding: 24px 20px; }
  .site-footer { padding: 20px 18px; }
  .modal-img { max-width: 95vw; }
  .toast { bottom: 16px; right: 16px; left: 16px; max-width: none; }
  .sort-btns { display: none; }
}

/* ═══════════════════════════════════════
   RESPONSIVE — Large screens
═══════════════════════════════════════ */
@media (min-width: 1440px) {
  .image-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
}
@media (min-width: 1920px) {
  .image-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}