/* ==============================
   PDF Resize Tool
   Swiss-utility aesthetic
   ============================== */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- Tokens --- */
:root {
  --bg: #faf9f7;
  --surface: #ffffff;
  --surface-hover: #f6f5f3;
  --text: #2c2c2c;
  --text-secondary: #6b6b6b;
  --text-muted: #9a9a9a;
  --border: #e8e6e3;
  --border-hover: #d0cdc8;
  --accent: #1a7a6d;
  --accent-hover: #15655a;
  --accent-light: #e8f4f2;
  --success: #2d8659;
  --success-light: #eaf5f0;
  --danger: #c44;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
  --radius: 8px;
  --radius-lg: 12px;
}

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

/* --- Base --- */
body {
  font-family: "DM Sans", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
}

/* --- Header --- */
header {
  margin-bottom: 2.5rem;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: 0.375rem;
  font-weight: 400;
}

/* --- Drop Zone --- */
.drop-zone {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.drop-zone:hover {
  border-color: var(--border-hover);
  background: var(--surface-hover);
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-light);
  box-shadow: 0 0 0 3px rgba(26, 122, 109, 0.1);
}

.drop-zone.has-file {
  border-color: var(--success);
  border-style: solid;
  background: var(--success-light);
}

.drop-icon {
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  transition: color 0.2s;
}

.drop-zone:hover .drop-icon {
  color: var(--text-secondary);
}

.drop-zone.drag-over .drop-icon {
  color: var(--accent);
}

.drop-zone p {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
}

.drop-zone-hint {
  color: var(--text-muted) !important;
  font-size: 0.8125rem !important;
  font-weight: 400 !important;
  margin-top: 0.25rem;
}

/* --- File Info --- */
.file-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
  padding: 0.625rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
}

.file-name {
  font-weight: 500;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8125rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 70%;
}

.file-size {
  color: var(--text-secondary);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8125rem;
  flex-shrink: 0;
}

/* --- Settings --- */
.settings {
  margin-top: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.settings summary {
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
}

.settings summary:hover {
  background: var(--surface-hover);
}

.settings summary::marker {
  color: var(--text-muted);
}

.settings-grid {
  padding: 0 1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.setting-item label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.setting-item input[type="number"] {
  width: 100%;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8125rem;
  color: var(--text);
  background: var(--bg);
  transition: border-color 0.15s;
}

.setting-item input[type="number"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(26, 122, 109, 0.1);
}

.slider-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.slider-group input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  height: 4px;
}

.slider-value {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8125rem;
  font-weight: 500;
  min-width: 3em;
  text-align: right;
  color: var(--text);
}

.setting-hint {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400 !important;
  margin-top: 0.125rem;
}

.radio-group {
  display: flex;
  gap: 1.25rem;
}

.radio-group label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 400;
  font-size: 0.875rem;
  cursor: pointer;
  color: var(--text);
}

.radio-group input[type="radio"] {
  accent-color: var(--accent);
}

/* --- Buttons --- */
.compress-btn {
  display: block;
  width: 100%;
  margin-top: 1.25rem;
  padding: 0.6875rem;
  font-family: "DM Sans", sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.compress-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

.compress-btn:active:not(:disabled) {
  transform: scale(0.99);
}

.compress-btn:disabled {
  background: var(--border);
  color: var(--text-muted);
  cursor: not-allowed;
}

.download-btn {
  display: block;
  width: 100%;
  margin-top: 0.75rem;
  padding: 0.6875rem;
  font-family: "DM Sans", sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  background: var(--success);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.download-btn:hover {
  background: #257549;
}

.download-btn:active {
  transform: scale(0.99);
}

/* --- Progress --- */
.progress-section {
  margin-top: 1.25rem;
}

.progress-bar-container {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

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

.progress-text {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
  text-align: center;
}

/* --- Result --- */
.result-section {
  margin-top: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.result-item {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.result-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.result-value {
  font-family: "JetBrains Mono", monospace;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
}

/* --- Footer --- */
footer {
  margin-top: 3rem;
  padding-bottom: 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.footer-repo {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.notice {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  line-height: 1;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
  margin-top: 0.25rem;
}

.github-link svg {
  flex-shrink: 0;
}

.github-link:hover {
  color: var(--text);
}

/* --- Responsive --- */
@media (max-width: 480px) {
  .container {
    padding: 2rem 1rem 1.5rem;
  }

  .drop-zone {
    padding: 2rem 1rem;
  }

  .result-grid {
    grid-template-columns: 1fr;
  }
}