/* ===========================================================
   WebP <-> PNG Converter — styles
   All classes are namespaced with "cvt-" and scoped under
   #cvt-app so they won't clash with your website's theme.
   =========================================================== */

:root {
  --cvt-bg-1: #0a1410;
  --cvt-bg-2: #101a2e;
  --cvt-bg-3: #081018;
  --cvt-glass: rgba(255, 255, 255, 0.055);
  --cvt-glass-2: rgba(255, 255, 255, 0.09);
  --cvt-border: rgba(255, 255, 255, 0.12);
  --cvt-text: #eef6f0;
  --cvt-muted: #a6b6c4;
  --cvt-dim: #6f8390;
  --cvt-green: #22c55e;
  --cvt-blue: #3b82f6;
  --cvt-indigo: #6366f1;
  --cvt-amber: #f59e0b;
  --cvt-grad: linear-gradient(135deg, #22c55e 0%, #6366f1 100%);
  --cvt-radius: 16px;
  --cvt-shadow: 0 22px 50px -22px rgba(0, 0, 0, 0.65);
  --cvt-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --cvt-display: 'Space Grotesk', var(--cvt-font);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; width: 100%; }

body {
  font-family: var(--cvt-font);
  color: var(--cvt-text);
  overflow: hidden; /* full-screen app — internal sections scroll instead */
  background:
    radial-gradient(1150px 780px at 84% -10%, rgba(34, 197, 94, 0.18), transparent 60%),
    radial-gradient(950px 720px at -6% 112%, rgba(99, 102, 241, 0.22), transparent 55%),
    linear-gradient(160deg, var(--cvt-bg-1), var(--cvt-bg-2) 52%, var(--cvt-bg-3));
  background-attachment: fixed;
}

/* Full-screen app shell */
#cvt-app {
  height: 100vh;
  height: 100dvh;
  width: 100vw;
  max-width: 1640px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.hidden { display: none !important; }

/* ---------- Header ---------- */
.cvt-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; flex-shrink: 0; }
.cvt-brand { display: flex; align-items: center; gap: 14px; min-width: 0; }
.cvt-logo { flex-shrink: 0; width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; background: var(--cvt-grad); color: #fff; box-shadow: 0 12px 24px -10px rgba(34, 197, 94, 0.6); }
.cvt-logo svg { width: 24px; height: 24px; }
.cvt-brand-text { min-width: 0; }
.cvt-brand-text h1 { margin: 0; font-family: var(--cvt-display); font-size: clamp(18px, 2.4vw, 25px); font-weight: 700; line-height: 1.1; }
.cvt-brand-text .cvt-arrow-h { color: var(--cvt-green); }
.cvt-brand-text p { margin: 3px 0 0; color: var(--cvt-muted); font-size: 13px; }
.cvt-header-actions { display: flex; gap: 10px; flex-wrap: wrap; flex-shrink: 0; }

/* ---------- Buttons ---------- */
.cvt-btn {
  font-family: inherit; font-size: 14px; font-weight: 600; color: var(--cvt-text);
  background: var(--cvt-glass); border: 1px solid var(--cvt-border); border-radius: 12px;
  padding: 10px 16px; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  transition: transform 0.15s ease, background 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease, filter 0.2s ease;
  -webkit-tap-highlight-color: transparent; white-space: nowrap;
}
.cvt-btn:hover { background: var(--cvt-glass-2); transform: translateY(-1px); }
.cvt-btn:active { transform: translateY(0); }
.cvt-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
.cvt-btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.cvt-btn-primary { background: var(--cvt-grad); border-color: transparent; color: #fff; box-shadow: 0 12px 26px -12px rgba(34, 197, 94, 0.7); }
.cvt-btn-primary:hover { filter: brightness(1.08); background: var(--cvt-grad); }
.cvt-btn-ghost { background: transparent; }
.cvt-btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 10px; }
.cvt-btn:focus-visible { outline: 2px solid var(--cvt-green); outline-offset: 2px; }

/* ---------- Controls ---------- */
.cvt-controls { flex-shrink: 0; }
.cvt-top-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: stretch; }

.cvt-dropzone {
  flex: 1 1 340px; min-width: 280px;
  border: 2px dashed rgba(255, 255, 255, 0.18); border-radius: var(--cvt-radius);
  padding: 16px 20px; background: var(--cvt-glass); cursor: pointer;
  display: flex; align-items: center; gap: 14px;
  transition: border-color 0.2s, background 0.2s, transform 0.15s;
}
.cvt-dropzone:hover { border-color: var(--cvt-green); background: var(--cvt-glass-2); }
.cvt-dropzone:focus-visible { outline: 2px solid var(--cvt-green); outline-offset: 3px; }
#cvt-app.cvt-dragging .cvt-dropzone { border-color: var(--cvt-indigo); background: rgba(99, 102, 241, 0.12); transform: scale(1.005); }
.cvt-drop-icon { flex-shrink: 0; width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; background: var(--cvt-grad); color: #fff; box-shadow: 0 12px 22px -10px rgba(34, 197, 94, 0.6); }
.cvt-drop-icon svg { width: 22px; height: 22px; }
.cvt-drop-text { min-width: 0; }
.cvt-drop-text strong { color: #fff; }
.cvt-drop-text .cvt-link { color: var(--cvt-green); text-decoration: underline; }
.cvt-drop-text small { display: block; color: var(--cvt-dim); font-size: 12px; margin-top: 3px; }

/* Settings */
.cvt-settings { flex: 1 1 460px; display: flex; gap: 22px; flex-wrap: wrap; align-items: flex-start; background: var(--cvt-glass); border: 1px solid var(--cvt-border); border-radius: var(--cvt-radius); padding: 12px 16px; }
.cvt-set-group { display: flex; flex-direction: column; gap: 8px; min-width: 200px; flex: 1 1 220px; }
.cvt-group-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--cvt-dim); font-weight: 700; }
.cvt-hint { font-size: 11.5px; color: var(--cvt-dim); min-height: 14px; max-width: 340px; }

/* Segmented control */
.cvt-seg { display: inline-flex; background: rgba(0, 0, 0, 0.28); border: 1px solid var(--cvt-border); border-radius: 12px; padding: 4px; gap: 3px; flex-wrap: wrap; }
.cvt-seg-btn {
  font-family: inherit; font-size: 13.5px; font-weight: 600; color: var(--cvt-muted);
  background: transparent; border: none; border-radius: 9px; padding: 8px 14px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 5px; transition: background 0.18s, color 0.18s, transform 0.12s;
}
.cvt-seg-btn:hover { color: var(--cvt-text); }
.cvt-seg-btn.active { background: var(--cvt-grad); color: #fff; box-shadow: 0 8px 18px -10px rgba(34, 197, 94, 0.7); }
.cvt-seg-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.cvt-seg-arrow { font-size: 14px; }

/* Quality */
.cvt-quality-row { display: flex; align-items: center; gap: 12px; }
.cvt-quality-row input[type="range"] { -webkit-appearance: none; appearance: none; flex: 1; min-width: 120px; height: 6px; border-radius: 6px; background: rgba(255, 255, 255, 0.16); outline: none; }
.cvt-quality-row input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--cvt-green); border: 2px solid #fff; cursor: pointer; box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4); }
.cvt-quality-row input[type="range"]::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--cvt-green); border: 2px solid #fff; cursor: pointer; }
.cvt-quality-val { font-family: var(--cvt-display); font-weight: 700; font-size: 16px; min-width: 46px; text-align: right; color: var(--cvt-text); }

/* Format pills */
.cvt-pill { display: inline-flex; align-items: center; font-size: 11px; font-weight: 700; letter-spacing: 0.02em; padding: 3px 9px; border-radius: 7px; color: #fff; }
.cvt-fmt-webp { background: var(--cvt-green); }
.cvt-fmt-png { background: var(--cvt-blue); }
.cvt-fmt-jpeg { background: var(--cvt-amber); }

/* ---------- Results ---------- */
.cvt-results { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: 16px; background: var(--cvt-glass); border: 1px solid var(--cvt-border); border-radius: var(--cvt-radius); }
.cvt-results::-webkit-scrollbar { width: 10px; }
.cvt-results::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.16); border-radius: 10px; }

.cvt-toolbar { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 10px 12px; margin-bottom: 14px; background: rgba(12, 24, 32, 0.8); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid var(--cvt-border); border-radius: 12px; }
.cvt-status { color: var(--cvt-muted); font-size: 14px; font-weight: 500; }
.cvt-sep { margin: 0 6px; color: var(--cvt-dim); }
.cvt-toolbar-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- Grid + cards ---------- */
.cvt-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.cvt-card { background: rgba(255, 255, 255, 0.04); border: 1px solid var(--cvt-border); border-radius: 14px; overflow: hidden; display: flex; flex-direction: column; transition: transform 0.15s ease, border-color 0.2s ease, box-shadow 0.2s ease; animation: cvt-pop 0.3s ease both; }
.cvt-card:hover { transform: translateY(-3px); border-color: rgba(34, 197, 94, 0.55); box-shadow: var(--cvt-shadow); }
@keyframes cvt-pop { from { opacity: 0; transform: translateY(8px) scale(0.98); } to { opacity: 1; transform: none; } }

.cvt-thumb {
  position: relative; height: 156px;
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.045) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.045) 75%),
    linear-gradient(45deg, rgba(255, 255, 255, 0.045) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.045) 75%);
  background-size: 20px 20px; background-position: 0 0, 10px 10px; background-color: #0e1a18;
  overflow: hidden; display: flex; align-items: center; justify-content: center;
}
.cvt-thumb img { max-width: 100%; max-height: 100%; object-fit: contain; display: block; }
.cvt-delta { position: absolute; top: 8px; right: 8px; font-size: 11.5px; font-weight: 700; padding: 3px 9px; border-radius: 20px; color: #fff; backdrop-filter: blur(4px); }
.cvt-delta.good { background: rgba(34, 197, 94, 0.92); }
.cvt-delta.bad { background: rgba(245, 158, 11, 0.92); }
.cvt-delta.neutral { background: rgba(120, 130, 140, 0.85); }
.cvt-thumb-loading, .cvt-thumb-error { display: grid; place-items: center; width: 100%; }
.cvt-spinner { width: 34px; height: 34px; border-radius: 50%; border: 3px solid rgba(255, 255, 255, 0.15); border-top-color: var(--cvt-green); animation: cvt-spin 0.8s linear infinite; }
@keyframes cvt-spin { to { transform: rotate(360deg); } }
.cvt-thumb-error { font-size: 30px; color: rgba(239, 68, 68, 0.8); }

.cvt-info { padding: 10px 12px 4px; }
.cvt-name { font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cvt-conv { display: flex; align-items: center; gap: 7px; margin-top: 7px; font-size: 12px; color: var(--cvt-dim); }
.cvt-conv .cvt-arr { color: var(--cvt-muted); }
.cvt-sizes { font-size: 11.5px; color: var(--cvt-muted); margin-top: 5px; }
.cvt-sizes .cvt-was { color: var(--cvt-dim); }
.cvt-sizes .cvt-now { color: var(--cvt-text); font-weight: 600; }
.cvt-actions { display: flex; gap: 8px; padding: 8px 12px 12px; margin-top: auto; }
.cvt-actions .cvt-btn { flex: 1; justify-content: center; }

/* ---------- Empty state ---------- */
.cvt-empty { min-height: 50vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 8px; padding: 24px; color: var(--cvt-muted); }
.cvt-empty-art { display: flex; align-items: center; gap: 14px; }
.cvt-empty-art .cvt-pill { font-size: 16px; padding: 7px 14px; }
.cvt-big-arrow { font-size: 34px; color: var(--cvt-muted); }
.cvt-empty h2 { color: var(--cvt-text); font-family: var(--cvt-display); margin: 18px 0 4px; font-size: 20px; }
.cvt-empty p { max-width: 500px; margin: 0; font-size: 14px; line-height: 1.5; }
.cvt-features { list-style: none; margin: 20px 0 0; padding: 0; display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.cvt-features li { font-size: 12.5px; color: var(--cvt-muted); background: var(--cvt-glass); border: 1px solid var(--cvt-border); padding: 6px 12px; border-radius: 999px; }

/* ---------- Progress ---------- */
.cvt-progress-wrap { margin-bottom: 14px; }
.cvt-progress-info { display: flex; justify-content: space-between; font-size: 13px; color: var(--cvt-muted); margin-bottom: 7px; }
.cvt-progress-bar { height: 9px; background: rgba(255, 255, 255, 0.1); border-radius: 10px; overflow: hidden; }
.cvt-progress-fill { height: 100%; width: 0; background: var(--cvt-grad); border-radius: 10px; transition: width 0.25s ease; }

/* ---------- Footer ---------- */
.cvt-footer { flex-shrink: 0; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; font-size: 12px; color: var(--cvt-dim); padding: 0 4px; }

/* ---------- Toast ---------- */
.cvt-toast { position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(24px); background: rgba(14, 26, 22, 0.96); border: 1px solid var(--cvt-border); color: var(--cvt-text); padding: 12px 18px; border-radius: 12px; font-size: 14px; font-weight: 500; opacity: 0; pointer-events: none; transition: opacity 0.3s ease, transform 0.3s ease; z-index: 1100; box-shadow: var(--cvt-shadow); max-width: 92vw; text-align: center; }
.cvt-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.cvt-toast.error { border-color: rgba(239, 68, 68, 0.6); }
.cvt-toast.success { border-color: rgba(34, 197, 94, 0.6); }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  #cvt-app { padding: 12px; gap: 10px; }
  .cvt-grid { grid-template-columns: repeat(auto-fill, minmax(155px, 1fr)); gap: 10px; }
  .cvt-settings { flex-basis: 100%; }
  .cvt-dropzone { flex-basis: 100%; }
  .cvt-brand-text p { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}