/* ============================================
   Bulk WebP Converter — Stylesheet
   Fonts: Ubuntu (primary), Noto Sans (secondary)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Ubuntu:wght@400;500;700&family=Noto+Sans:wght@400;500;600&family=DM+Mono:wght@400;500&display=swap');

/* -----------------------------------
   CSS Custom Properties (Brand Tokens)
   ----------------------------------- */
:root {
  /* Primary — slate blue-gray */
  --color-primary:           #243447;
  --color-primary-offset-1:  #141C24;
  --color-primary-offset-2:  #3A4C5C;
  --color-primary-muted:     #EDF2F5;

  /* Secondary — mint highlight */
  --color-secondary:         #3DDC97;
  --color-secondary-offset-1:#2BBF82;
  --color-secondary-offset-2:#9FF3D1;
  --color-secondary-muted:   #E9FBF5;
  --color-secondary-contrast:#1FA86C;

  /* Tertiary — coral */
  --color-tertiary:          #FF6F61;
  --color-tertiary-offset-1: #CC564C;
  --color-tertiary-offset-2: #FF8A75;
  --color-tertiary-muted:    #FFE9E6;
  --color-tertiary-contrast: #B23A2C;

  /* Shades */
  --white:       #ffffff;
  --off-white:   #EDF6FE;
  --black:       #000000;
  --off-black:   #231F20;
  --grey-light:  #ececec;
  --grey-dark:   #212529;
  --error:       #ff6767;
  --success:     #b9ffb9;

  /* Fonts */
  --font-primary:   'Ubuntu', sans-serif;
  --font-secondary: 'Noto Sans', sans-serif;
  --font-mono:      'DM Mono', monospace;

  /* Semantic aliases used in components */
  --bg:           var(--color-primary-offset-1);
  --surface:      var(--color-primary);
  --surface2:     var(--color-primary-offset-2);
  --surface3:     #2e3f50;
  --border:       rgba(255, 255, 255, 0.08);
  --border2:      rgba(255, 255, 255, 0.14);
  --accent:       var(--color-secondary);
  --accent-dim:   rgba(61, 220, 151, 0.12);
  --accent-glow:  rgba(61, 220, 151, 0.25);
  --accent-dark:  var(--color-secondary-contrast);
  --text:         var(--off-white);
  --text2:        #92aabf;
  --text3:        #556a7a;
  --danger:       var(--color-tertiary);
  --danger-dim:   rgba(255, 111, 97, 0.12);
  --danger-deep:  var(--color-tertiary-contrast);
}

/* -----------------------------------
   Reset & Base
   ----------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 1rem 4rem;
}

/* -----------------------------------
   Header
   ----------------------------------- */
header {
  width: 100%;
  max-width: 860px;
  padding: 3rem 0 2.5rem;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.logo-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.logo-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--text);
}

.logo-title span { color: var(--accent); }

.header-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text3);
  text-align: right;
  line-height: 1.8;
}

/* -----------------------------------
   Main Layout
   ----------------------------------- */
.main {
  width: 100%;
  max-width: 860px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* -----------------------------------
   Drop Zone
   ----------------------------------- */
.dropzone {
  border: 1.5px dashed var(--border2);
  border-radius: 16px;
  background: var(--surface);
  padding: 3.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  position: relative;
  overflow: hidden;
}

.dropzone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-dim) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.dropzone:hover,
.dropzone.drag-over {
  border-color: var(--accent);
  background: var(--surface2);
}

.dropzone:hover::before,
.dropzone.drag-over::before { opacity: 1; }

.drop-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--surface3);
  border: 1px solid var(--border2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.drop-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.8;
}

.drop-label {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.01em;
}

.drop-sub {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text2);
  letter-spacing: 0.05em;
}

.drop-btn {
  margin-top: 0.5rem;
  padding: 0.55rem 1.5rem;
  border-radius: 8px;
  background: var(--accent-dim);
  border: 1px solid rgba(61, 220, 151, 0.3);
  color: var(--accent);
  font-family: var(--font-primary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  letter-spacing: 0.01em;
}

.drop-btn:hover {
  background: var(--accent-glow);
  border-color: rgba(61, 220, 151, 0.5);
}

#file-input { display: none; }

/* -----------------------------------
   Settings Bar
   ----------------------------------- */
.settings-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.setting-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  min-width: 180px;
}

.setting-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.setting-value {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  min-width: 32px;
  text-align: right;
}

input[type="range"] {
  -webkit-appearance: none;
  flex: 1;
  height: 4px;
  background: var(--surface3);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 0 3px var(--accent-dim);
  transition: box-shadow 0.15s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 5px var(--accent-glow);
}

.setting-divider {
  width: 1px;
  height: 32px;
  background: var(--border);
  flex-shrink: 0;
}

.max-size-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--surface3);
  border: 1px solid var(--border2);
  color: var(--text2);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.max-size-badge strong {
  color: var(--text);
  font-weight: 500;
}

/* -----------------------------------
   File List
   ----------------------------------- */
.file-list-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.file-list-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0.25rem;
}

.file-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text2);
  letter-spacing: 0.06em;
}

.clear-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text3);
  background: none;
  border: none;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: color 0.15s;
  padding: 4px 8px;
}

.clear-btn:hover { color: var(--danger); }

.file-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.file-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  display: grid;
  grid-template-columns: 40px 1fr auto auto;
  align-items: center;
  gap: 0.75rem;
  transition: border-color 0.2s;
  animation: slideIn 0.2s ease forwards;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.file-item.done       { border-color: rgba(61, 220, 151, 0.25); }
.file-item.error      { border-color: rgba(255, 111, 97, 0.25); }
.file-item.processing { border-color: rgba(61, 220, 151, 0.15); }

.file-thumb {
  width: 40px;
  height: 40px;
  border-radius: 7px;
  object-fit: cover;
  background: var(--surface3);
  flex-shrink: 0;
  border: 1px solid var(--border);
}

.file-thumb-placeholder {
  width: 40px;
  height: 40px;
  border-radius: 7px;
  background: var(--surface3);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.file-info {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.file-original {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text3);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-name {
  font-family: var(--font-secondary);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: -0.01em;
}

.file-name .ext { color: var(--accent); }

.file-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text2);
  white-space: nowrap;
  text-align: right;
  line-height: 1.7;
}

.file-meta .size-after { color: var(--accent); }
.file-meta .dims       { color: var(--text3); }

.file-status {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  flex-shrink: 0;
}

.status-waiting    { background: var(--surface3); }
.status-processing { background: var(--accent-dim); }
.status-done       { background: var(--accent-dim); }
.status-error      { background: var(--danger-dim); }

/* -----------------------------------
   Spinner & Icons
   ----------------------------------- */
.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(61, 220, 151, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.check-icon { width: 14px; height: 14px; stroke: var(--accent); fill: none; stroke-width: 2.5; }
.x-icon     { width: 14px; height: 14px; stroke: var(--danger); fill: none; stroke-width: 2.5; }
.dot-icon   { width: 8px; height: 8px; background: var(--text3); border-radius: 50%; }

/* -----------------------------------
   Action Bar
   ----------------------------------- */
.action-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 0.25rem;
}

.convert-btn {
  flex: 1;
  padding: 1rem 2rem;
  border-radius: 10px;
  background: var(--accent);
  border: none;
  color: var(--color-primary-offset-1);
  font-family: var(--font-primary);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: -0.01em;
  transition: opacity 0.15s, transform 0.1s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.convert-btn:hover  { opacity: 0.9; }
.convert-btn:active { transform: scale(0.99); }
.convert-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.convert-btn svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-primary-offset-1);
  fill: none;
  stroke-width: 2.2;
}

.download-all-btn {
  padding: 1rem 1.5rem;
  border-radius: 10px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: var(--font-primary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.download-all-btn:hover {
  background: var(--surface3);
  border-color: var(--border2);
}

.download-all-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.download-all-btn svg {
  width: 16px;
  height: 16px;
  stroke: var(--text2);
  fill: none;
  stroke-width: 2;
}

/* -----------------------------------
   Progress Bar
   ----------------------------------- */
.progress-wrap {
  height: 3px;
  background: var(--surface3);
  border-radius: 2px;
  overflow: hidden;
  display: none;
}

.progress-wrap.active { display: block; }

.progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s ease;
  width: 0%;
}

/* -----------------------------------
   Stats Row
   ----------------------------------- */
.stats-row {
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.stats-row.visible { display: grid; }

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.875rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.stat-value.neutral { color: var(--text); }

/* -----------------------------------
   Download Link (per file)
   ----------------------------------- */
.dl-link {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid rgba(61, 220, 151, 0.25);
  padding: 3px 8px;
  border-radius: 5px;
  letter-spacing: 0.05em;
  transition: background 0.15s;
  cursor: pointer;
}

.dl-link:hover { background: var(--accent-dim); }

/* -----------------------------------
   Resized Badge
   ----------------------------------- */
.resized-badge {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-tertiary-offset-1);
  background: var(--color-tertiary-muted);
  border: 1px solid rgba(255, 111, 97, 0.25);
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

/* -----------------------------------
   Responsive
   ----------------------------------- */
@media (max-width: 600px) {
  header { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .file-item { grid-template-columns: 36px 1fr auto; }
  .file-meta { display: none; }
  .stats-row { grid-template-columns: 1fr 1fr; }
}