:root {
  color-scheme: dark;
  --bg: #070912;
  --bg-soft: #11162a;
  --card: rgba(18, 24, 46, 0.7);
  --text: #eef3ff;
  --muted: #a5b0d0;
  --primary: #66a3ff;
  --primary-strong: #4f8ff0;
  --border: rgba(135, 165, 255, 0.25);
  --danger: #ff6d86;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at 20% 20%, #182145 0%, var(--bg) 60%);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 24px;
  overflow-x: hidden;
}

.bg-glow {
  position: fixed;
  border-radius: 999px;
  filter: blur(80px);
  z-index: -1;
}

.bg-glow-a {
  width: 300px;
  height: 300px;
  background: rgba(103, 148, 255, 0.35);
  top: -40px;
  right: -40px;
}

.bg-glow-b {
  width: 280px;
  height: 280px;
  background: rgba(138, 98, 255, 0.3);
  bottom: -50px;
  left: -30px;
}

.app-shell {
  width: min(900px, 100%);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(22, 29, 56, 0.85), rgba(9, 12, 24, 0.9));
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  padding: 24px;
  display: grid;
  gap: 18px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 0.86rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.sub {
  margin: 8px 0 0;
  color: var(--muted);
  max-width: 70ch;
}

.tabs {
  display: flex;
  gap: 8px;
  padding: 4px;
  border-radius: 14px;
  background: rgba(8, 12, 24, 0.6);
  border: 1px solid var(--border);
}

.tab {
  flex: 1;
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  background: transparent;
  color: var(--muted);
  transition: background 0.2s ease, color 0.2s ease;
}

.tab.active {
  background: linear-gradient(145deg, var(--primary), var(--primary-strong));
  color: #06102c;
}

.editor-panel[hidden] {
  display: none;
}

.dropzone-wrap {
  display: grid;
  gap: 8px;
}

.dropzone {
  border: 2px dashed rgba(130, 164, 255, 0.45);
  border-radius: 18px;
  min-height: 165px;
  background: rgba(92, 137, 255, 0.08);
  display: grid;
  place-items: center;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.dropzone.dragover {
  border-color: var(--primary);
  background: rgba(92, 137, 255, 0.17);
  transform: scale(1.01);
}

#fileInput {
  display: none;
}

#insertFileInput {
  display: none;
}

.drop-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
}

.drop-alt,
.hint {
  margin: 6px 0 0;
  color: var(--muted);
}

.list-card {
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card);
  padding: 16px;
}

.card-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.card-top h2 {
  margin: 0;
  font-size: 1.1rem;
}

.actions {
  display: flex;
  gap: 8px;
}

.option-row {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.option-row input {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

.btn {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.btn-primary {
  background: linear-gradient(145deg, var(--primary), var(--primary-strong));
  color: #06102c;
}

.btn-ghost {
  background: rgba(130, 158, 235, 0.15);
  color: var(--text);
}

.file-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.file-item {
  border: 1px solid rgba(127, 157, 238, 0.35);
  border-radius: 12px;
  background: rgba(8, 12, 24, 0.7);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
}

.file-main {
  display: grid;
  gap: 2px;
}

.file-name {
  font-weight: 600;
}

.file-size {
  color: var(--muted);
  font-size: 0.86rem;
}

.file-controls {
  display: flex;
  gap: 6px;
}

.control-btn {
  border: 0;
  border-radius: 8px;
  padding: 6px 9px;
  background: rgba(117, 147, 233, 0.2);
  color: var(--text);
  cursor: pointer;
}

.control-btn.remove {
  background: rgba(255, 109, 134, 0.18);
  color: #ffc5d0;
}

.control-btn.insert {
  background: rgba(102, 163, 255, 0.22);
  color: #d9e9ff;
}

.control-btn.edit {
  background: rgba(138, 98, 255, 0.25);
  color: #e8deff;
}

.editor-filename {
  margin: 0 0 12px;
  font-weight: 600;
  color: var(--primary);
}

.editor-drop {
  min-height: 120px;
  margin-bottom: 14px;
}

.editor-tools {
  display: grid;
  gap: 10px;
  margin-bottom: 12px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(127, 157, 238, 0.25);
  background: rgba(8, 12, 24, 0.5);
}

.watermark-row {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

.watermark-row input {
  border: 1px solid rgba(127, 157, 238, 0.35);
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(6, 10, 20, 0.8);
  color: var(--text);
  font: inherit;
}

.watermark-row input:focus {
  outline: 2px solid rgba(102, 163, 255, 0.5);
  border-color: var(--primary);
}

.editor-hint {
  margin-bottom: 12px;
}

.editor-page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.form-section {
  margin-bottom: 16px;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(127, 157, 238, 0.3);
  background: rgba(8, 12, 24, 0.45);
}

.section-title {
  margin: 0 0 10px;
  font-size: 1rem;
}

.pdf-form {
  display: grid;
  gap: 12px;
  max-height: 280px;
  overflow-y: auto;
  padding-left: 4px;
}

.form-field {
  display: grid;
  gap: 6px;
}

.form-field > label:first-child {
  font-size: 0.88rem;
  color: var(--muted);
  font-weight: 600;
}

.form-input {
  border: 1px solid rgba(127, 157, 238, 0.35);
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(6, 10, 20, 0.8);
  color: var(--text);
  font: inherit;
  width: 100%;
}

.form-input:focus {
  outline: 2px solid rgba(102, 163, 255, 0.5);
  border-color: var(--primary);
}

.page-meta {
  color: var(--muted);
  font-size: 0.78rem;
}

.page-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}

.page-card {
  border: 1px solid rgba(127, 157, 238, 0.35);
  border-radius: 12px;
  background: rgba(8, 12, 24, 0.75);
  padding: 10px;
  display: grid;
  gap: 10px;
}

.page-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
}

.page-num {
  font-weight: 700;
  font-size: 0.95rem;
}

.page-rot {
  color: var(--muted);
  font-size: 0.8rem;
}

.page-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.page-card-actions .control-btn {
  flex: 1;
  min-width: 36px;
  padding: 6px;
  font-size: 0.85rem;
}

.empty {
  margin: 8px 2px 2px;
  color: var(--muted);
}

.status {
  min-height: 24px;
  color: var(--muted);
}

.status.error {
  color: var(--danger);
}

.status.success {
  color: #80f2b2;
}

.btn-sm {
  padding: 6px 10px;
  font-size: 0.82rem;
}

@media (max-width: 650px) {
  .card-top {
    flex-direction: column;
    align-items: stretch;
  }

  .actions {
    justify-content: flex-end;
  }

  .file-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .file-controls {
    flex-wrap: wrap;
  }

  .page-list {
    grid-template-columns: 1fr 1fr;
  }
}