/* ===========================
   Photo+ · Style
   =========================== */

:root {
  --bg:       #0a0a0f;
  --surface:  #111118;
  --panel:    #16161f;
  --border:   #2a2a3a;
  --border-hi:#3d3d55;
  --text:     #e8e8f0;
  --muted:    #7a7a99;
  --accent:   #c8ff3e;
  --accent2:  #3ecfff;
  --danger:   #ff4f4f;
  --radius:   12px;
  --font-ui:  'Syne', sans-serif;
  --font-mono:'DM Mono', monospace;
  --trans:    0.2s ease;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Grain overlay */
#grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 128px 128px;
}

/* HEADER */
header {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  background: rgba(10,10,15,0.92);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-family: var(--font-ui);
  font-weight: 800;
  font-size: 1.6rem;
  letter-spacing: -0.03em;
  line-height: 1;
}
.logo-photo { color: var(--text); }
.logo-plus  { color: var(--accent); }

.tagline {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-info {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

/* MAIN */
main {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 48px 32px;
  display: flex;
  flex-direction: column;
  gap: 48px;
}

/* STEP */
.step { display: flex; flex-direction: column; gap: 24px; }
.step.hidden { display: none; }

.step-label {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.step-num {
  color: var(--accent);
  font-family: var(--font-mono);
}

/* DROP ZONE */
.dropzone {
  position: relative;
  border: 2px dashed var(--border-hi);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  transition: border-color var(--trans), background var(--trans), transform var(--trans);
  outline: none;
  overflow: hidden;
}
.dropzone:hover,
.dropzone:focus { border-color: var(--accent); }
.dropzone.dragover {
  border-color: var(--accent);
  background: rgba(200,255,62,0.04);
  transform: scale(1.005);
}

.drop-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 64px 32px;
  text-align: center;
}

.drop-icon {
  width: 64px;
  height: 64px;
  color: var(--accent);
  margin-bottom: 4px;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

.drop-title {
  font-size: 1.2rem;
  font-weight: 700;
}
.drop-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.btn-browse {
  display: inline-block;
  margin-top: 8px;
  padding: 10px 24px;
  background: transparent;
  border: 1.5px solid var(--border-hi);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--trans), color var(--trans), background var(--trans);
}
.btn-browse:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(200,255,62,0.05);
}

.drop-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  background: rgba(10,10,15,0.7);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--trans);
  letter-spacing: -0.02em;
}
.dropzone.dragover .drop-overlay { opacity: 1; }

/* FILE GRID */
.file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
}

.file-card {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: var(--panel);
  border: 1.5px solid var(--border);
  aspect-ratio: 1;
  cursor: default;
  transition: border-color var(--trans), transform var(--trans);
  animation: cardIn 0.3s ease both;
}
.file-card:hover { border-color: var(--border-hi); transform: scale(1.02); }
@keyframes cardIn {
  from { opacity: 0; transform: scale(0.9); }
  to   { opacity: 1; transform: scale(1); }
}

.file-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.file-card-num {
  position: absolute;
  top: 6px;
  left: 6px;
  background: rgba(10,10,15,0.85);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}
.file-card-name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(10,10,15,0.9));
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  padding: 12px 6px 5px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-card-del {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(255,79,79,0.15);
  border: none;
  color: var(--danger);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--trans), background var(--trans);
  font-size: 0.7rem;
  line-height: 1;
}
.file-card:hover .file-card-del { opacity: 1; }
.file-card-del:hover { background: rgba(255,79,79,0.3); }

/* ACTIONS BAR */
.actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 20px 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.file-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.action-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.format-select {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 600;
}

.toggle-group {
  display: flex;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.toggle-btn {
  padding: 7px 16px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--trans), color var(--trans);
}
.toggle-btn.active {
  background: var(--accent);
  color: var(--bg);
  font-weight: 700;
}
.toggle-btn:not(.active):hover { color: var(--text); }

/* BUTTONS */
.btn-primary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 8px;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--trans), transform var(--trans), box-shadow var(--trans);
  margin-left: auto;
}
.btn-primary svg { width: 18px; height: 18px; }
.btn-primary:hover {
  background: #d9ff6a;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(200,255,62,0.3);
}
.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  padding: 10px 20px;
  background: transparent;
  border: 1.5px solid var(--border-hi);
  border-radius: 8px;
  color: var(--muted);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--trans), color var(--trans);
}
.btn-secondary:hover { border-color: var(--text); color: var(--text); }

/* PROCESS PANEL */
.process-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.process-stage {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
}

.progress-track {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  width: 0%;
  border-radius: 2px;
  transition: width 0.4s ease;
}

.process-detail {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  min-height: 1.2em;
}

.canvas-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.canvas-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.canvas-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.canvas-wrap canvas {
  width: 100%;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  display: block;
}

/* RESULT PANEL */
.result-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.result-image-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--border);
  max-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.result-image-wrap img {
  max-width: 100%;
  max-height: 520px;
  object-fit: contain;
  display: block;
}

.result-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(10,10,15,0.85);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 5px 12px;
  border-radius: 6px;
}

.result-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.meta-chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 6px;
}

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

.btn-export {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 8px;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--trans), transform var(--trans), box-shadow var(--trans);
}
.btn-export svg { width: 20px; height: 20px; }
.btn-export:hover {
  background: #d9ff6a;
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(200,255,62,0.35);
}

/* EXIF TOOLTIP */
.exif-tooltip {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(10,10,15,0.95);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--border);
  padding: 12px 16px;
  display: none;
  flex-wrap: wrap;
  gap: 6px 16px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
}
.file-card:hover .exif-tooltip { display: flex; }
.exif-row { display: flex; gap: 4px; }
.exif-key { color: var(--accent2); }

/* FOOTER */
footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 40px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
}

/* TOAST */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--panel);
  border: 1px solid var(--border-hi);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 10px 20px;
  border-radius: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 500;
  white-space: nowrap;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.error { border-color: var(--danger); color: var(--danger); }
.toast.ok    { border-color: var(--accent); color: var(--accent); }

/* RESPONSIVE */
@media (max-width: 700px) {
  header { padding: 16px 20px; }
  main   { padding: 32px 16px; }
  .canvas-row { grid-template-columns: 1fr; }
  footer { padding: 12px 20px; flex-direction: column; gap: 4px; text-align: center; }
  .action-row { flex-direction: column; align-items: flex-start; }
  .btn-primary { margin-left: 0; width: 100%; justify-content: center; }
}

/* SCROLLBAR */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 3px; }