/* ── Reset & tokens ─────────────────────────────────────────────────────── */
:root {
  --primary:      #6366f1;
  --primary-dark: #4f46e5;
  --primary-faint:#eef2ff;
  --green:        #22c55e;
  --bg:           #f8fafc;
  --surface:      #ffffff;
  --border:       #e2e8f0;
  --text:         #1e293b;
  --muted:        #64748b;
  --danger:       #ef4444;
  --radius:       14px;
  --radius-sm:    8px;
  --shadow:       0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:    0 4px 16px rgba(0,0,0,.08);
  --transition:   0.18s ease;
}

:root[data-theme="dark"] {
  --primary:      #818cf8;
  --primary-dark: #6366f1;
  --primary-faint:#1e1b4b;
  --bg:           #0f172a;
  --surface:      #1e293b;
  --border:       #334155;
  --text:         #f1f5f9;
  --muted:        #94a3b8;
  --shadow:       0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.2);
  --shadow-md:    0 4px 16px rgba(0,0,0,.4);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}

/* ── Header ─────────────────────────────────────────────────────────────── */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 200;
  box-shadow: var(--shadow);
  transition: background var(--transition), border-color var(--transition);
}

.header-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
}

.logo-icon {
  width: 22px; height: 22px;
  color: var(--primary);
  flex-shrink: 0;
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.3px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.online-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 12px;
  transition: background var(--transition), border-color var(--transition);
}

.pulse-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .6; transform: scale(.85); }
}

/* ── Theme toggle ───────────────────────────────────────────────────────── */
.theme-toggle {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--primary-faint);
  border-color: var(--primary);
  color: var(--primary);
}

.theme-toggle svg { width: 16px; height: 16px; }

/* show sun in dark mode, moon in light */
:root .icon-moon { display: block; }
:root .icon-sun  { display: none; }
:root[data-theme="dark"] .icon-moon { display: none; }
:root[data-theme="dark"] .icon-sun  { display: block; }

/* ── Main layout ────────────────────────────────────────────────────────── */
.main {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 48px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ── Upload card ────────────────────────────────────────────────────────── */
.upload-card {
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  user-select: none;
}

.upload-card:hover,
.upload-card.drag-over {
  border-color: var(--primary);
  background: var(--primary-faint);
}

.upload-body {
  padding: 44px 24px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
  pointer-events: none;
}

.upload-graphic svg {
  width: 68px; height: 68px;
  margin-bottom: 4px;
}

.upload-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
}

.upload-sub {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 4px;
}

.btn-primary {
  pointer-events: auto;
  margin-top: 4px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 11px 22px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  touch-action: manipulation;
}

.btn-primary:hover  { background: var(--primary-dark); }
.btn-primary:active { transform: scale(.97); }

/* ── Upload queue ───────────────────────────────────────────────────────── */
#upload-queue {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.queue-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slide-in .2s ease forwards;
  transition: opacity .3s ease;
}

.queue-item.fade-out { opacity: 0; }

.queue-name {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.queue-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.queue-pct {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  min-width: 32px;
  text-align: right;
}

.queue-track {
  width: 80px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.queue-bar {
  height: 100%;
  background: var(--primary);
  border-radius: 2px;
  transition: width .12s linear;
  width: 0%;
}

.queue-status {
  font-size: 16px;
  line-height: 1;
}

.queue-item.done   .queue-status { color: var(--green); }
.queue-item.error  .queue-status { color: var(--danger); }
.queue-item.done   .queue-track,
.queue-item.done   .queue-pct   { display: none; }
.queue-item.error  .queue-track,
.queue-item.error  .queue-pct   { display: none; }

/* ── Files section ──────────────────────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.section-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}

.file-count {
  font-size: 11px;
  font-weight: 700;
  background: var(--primary-faint);
  color: var(--primary);
  border-radius: 20px;
  padding: 2px 8px;
  display: none;
}

.file-count.visible { display: inline-block; }

#file-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ── File card ──────────────────────────────────────────────────────────── */
.file-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow);
  animation: slide-in .22s ease forwards;
  transition: background var(--transition), border-color var(--transition);
}

@keyframes slide-in {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.file-thumb {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--primary-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  overflow: hidden;
}

.file-thumb-img {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 10px;
  display: block;
}

.file-info {
  flex: 1;
  min-width: 0;
}

.file-name {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 3px;
}

.file-meta {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.expiry-warn { color: #f59e0b; }

.file-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.btn-icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  touch-action: manipulation;
}

.btn-icon:hover {
  background: var(--bg);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-icon.btn-dl {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn-icon.btn-dl:hover { background: var(--primary-dark); border-color: var(--primary-dark); }

.btn-icon.btn-del:hover { border-color: var(--danger); color: var(--danger); }

/* ── Empty state ────────────────────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 56px 24px;
  text-align: center;
  color: var(--muted);
  gap: 6px;
}

.empty-icon { width: 52px; height: 52px; margin-bottom: 8px; }
.empty-state p { font-size: 15px; font-weight: 500; }
.empty-sub    { font-size: 13px; color: var(--muted); }

/* ── Toast ──────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--text);
  color: var(--surface);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 24px;
  box-shadow: var(--shadow-md);
  transition: transform .25s cubic-bezier(.34,1.56,.64,1);
  z-index: 999;
  pointer-events: none;
  white-space: nowrap;
}

.toast.show { transform: translateX(-50%) translateY(0); }

/* ── Footer ─────────────────────────────────────────────────────────────── */
.footer {
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  padding: 0 16px 24px;
}

/* ── Mobile tweaks ──────────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .header-inner { padding: 10px 14px; }
  .online-pill  { font-size: 12px; padding: 4px 10px; }

  .upload-body { padding: 32px 16px 26px; }
  .upload-graphic svg { width: 56px; height: 56px; }
  .upload-title { font-size: 17px; }

  .file-card    { padding: 12px 12px; gap: 10px; }
  .file-thumb   { width: 38px; height: 38px; font-size: 18px; }
  .file-name    { font-size: 13px; }
  .file-meta    { font-size: 11px; gap: 6px; }
  .btn-icon     { width: 32px; height: 32px; font-size: 14px; }

  .queue-track  { width: 60px; }
}