/* ============================================
   EveryTool4U — PDF Tools Platform
   Light, clean, modern design
   ============================================ */

:root {
  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --primary-light: #EEF2FF;
  --primary-50: #E0E7FF;
  --success: #10B981;
  --success-light: #D1FAE5;
  --warning: #F59E0B;
  --danger: #EF4444;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;
  --white: #FFFFFF;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --max-width: 1200px;
  --transition: all 0.2s ease;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--gray-800);
  background: var(--gray-50);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

img { max-width: 100%; height: auto; }

/* ---- HEADER / NAV ---- */
.header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
}

.logo svg {
  width: 32px;
  height: 32px;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--gray-600);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--primary);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
  color: var(--gray-700);
}

/* ---- HERO ---- */
.hero {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 100%);
  padding: 64px 24px;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 16px;
  line-height: 1.2;
}

.hero h1 span {
  color: var(--primary);
}

.hero p {
  font-size: 1.15rem;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto 24px;
}

.privacy-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--success-light);
  color: #065F46;
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
}

.privacy-hero-badge svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ---- TOOL GRID ---- */
.tools-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px;
}

.tools-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.tools-section .section-desc {
  color: var(--gray-500);
  margin-bottom: 32px;
  font-size: 0.95rem;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.tool-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.tool-card .tool-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.tool-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gray-800);
}

.tool-card p {
  font-size: 0.8rem;
  color: var(--gray-500);
  line-height: 1.4;
}

/* Tool icon colors */
.icon-merge { background: #DBEAFE; color: #2563EB; }
.icon-compress { background: #FEF3C7; color: #D97706; }
.icon-split { background: #FCE7F3; color: #DB2777; }
.icon-jpg2pdf { background: #D1FAE5; color: #059669; }
.icon-pdf2jpg { background: #E0E7FF; color: #4F46E5; }
.icon-rotate { background: #FEE2E2; color: #DC2626; }
.icon-unlock { background: #CFFAFE; color: #0891B2; }
.icon-sign { background: #F3E8FF; color: #7C3AED; }
.icon-protect { background: #FEF9C3; color: #CA8A04; }
.icon-watermark { background: #ECFDF5; color: #10B981; }

/* ---- TOOL PAGE LAYOUT ---- */
.tool-page {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.tool-header {
  text-align: center;
  margin-bottom: 32px;
}

.tool-header h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.tool-header p {
  color: var(--gray-500);
  font-size: 1rem;
  max-width: 500px;
  margin: 0 auto;
}

/* ---- DROP ZONE ---- */
.drop-zone {
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: var(--white);
  position: relative;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--primary);
  background: var(--primary-light);
}

.drop-zone svg {
  width: 48px;
  height: 48px;
  color: var(--gray-400);
  margin-bottom: 16px;
}

.drop-zone.drag-over svg {
  color: var(--primary);
}

.drop-zone h3 {
  font-size: 1.1rem;
  color: var(--gray-700);
  margin-bottom: 8px;
}

.drop-zone p {
  color: var(--gray-400);
  font-size: 0.85rem;
}

.drop-zone .browse-btn {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 28px;
  background: var(--primary);
  color: var(--white);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}

.drop-zone .browse-btn:hover {
  background: var(--primary-hover);
}

.drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* ---- FILE LIST ---- */
.file-list {
  margin-top: 16px;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.file-item .file-name {
  flex: 1;
  font-size: 0.9rem;
  color: var(--gray-700);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-item .file-size {
  font-size: 0.8rem;
  color: var(--gray-400);
}

.file-item .remove-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-400);
  padding: 4px;
  border-radius: 4px;
  transition: var(--transition);
}

.file-item .remove-btn:hover {
  color: var(--danger);
  background: #FEE2E2;
}

/* ---- CONTROLS ---- */
.controls {
  margin-top: 24px;
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
}

.controls label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.controls input[type="text"],
.controls input[type="password"],
.controls input[type="number"],
.controls select,
.controls textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--gray-800);
  background: var(--white);
  transition: var(--transition);
}

.controls input:focus,
.controls select:focus,
.controls textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

.control-row {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.control-row > * {
  flex: 1;
  min-width: 180px;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-primary:disabled {
  background: var(--gray-300);
  cursor: not-allowed;
}

.btn-success {
  background: var(--success);
  color: var(--white);
}

.btn-success:hover {
  background: #059669;
}

.btn-outline {
  background: var(--white);
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-block {
  width: 100%;
}

.action-bar {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* ---- PDF PREVIEW ---- */
.preview-section {
  margin-top: 24px;
}

.preview-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 12px;
}

.preview-container {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
}

.preview-pages {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.preview-page {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 4px;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.preview-page canvas {
  display: block;
  max-width: 200px;
  height: auto;
}

.preview-page .page-num {
  text-align: center;
  font-size: 0.75rem;
  color: var(--gray-500);
  padding: 4px 0;
}

.preview-page.selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79,70,229,0.2);
}

/* Large single preview */
.preview-single {
  text-align: center;
}

.preview-single canvas {
  max-width: 100%;
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-sm);
}

/* ---- PRIVACY BADGE ---- */
.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--success-light);
  color: #065F46;
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 16px;
}

.privacy-badge svg {
  width: 14px;
  height: 14px;
}

/* ---- PROGRESS ---- */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--gray-200);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 12px;
  display: none;
}

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

.progress-bar .progress-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 0%;
}

/* ---- RESULT SECTION ---- */
.result-section {
  margin-top: 24px;
  padding: 24px;
  background: var(--primary-light);
  border: 1px solid var(--primary-50);
  border-radius: var(--radius);
  text-align: center;
  display: none;
}

.result-section.visible {
  display: block;
}

.result-section .result-info {
  font-size: 0.9rem;
  color: var(--gray-600);
  margin-bottom: 16px;
}

.result-section .size-comparison {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
  font-size: 0.85rem;
}

.size-comparison .original { color: var(--gray-500); }
.size-comparison .arrow { color: var(--gray-400); }
.size-comparison .result { color: var(--success); font-weight: 600; }

/* ---- FOOTER ---- */
.footer {
  margin-top: auto;
  background: var(--white);
  border-top: 1px solid var(--gray-200);
  padding: 40px 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand p {
  color: var(--gray-500);
  font-size: 0.85rem;
  margin-top: 8px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--gray-500);
  font-size: 0.85rem;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 24px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--gray-200);
  text-align: center;
  font-size: 0.8rem;
  color: var(--gray-400);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero h1 { font-size: 1.75rem; }
  .hero { padding: 40px 16px; }

  .tool-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .tool-card {
    padding: 16px 12px;
  }

  .tool-card .tool-icon {
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }

  .nav-links { display: none; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 16px 24px;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
  }

  .mobile-menu-btn { display: block; }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .control-row {
    flex-direction: column;
  }

  .tool-header h1 { font-size: 1.5rem; }

  .preview-page canvas { max-width: 140px; }

  .action-bar { flex-direction: column; }
}

@media (max-width: 480px) {
  .tool-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .drop-zone { padding: 32px 16px; }
}

/* ---- DRAGGABLE LIST (merge/reorder) ---- */
.sortable-list {
  list-style: none;
}

.sortable-list .file-item {
  cursor: grab;
}

.sortable-list .file-item:active {
  cursor: grabbing;
}

.sortable-list .file-item.dragging {
  opacity: 0.5;
  background: var(--primary-light);
}

.drag-handle {
  color: var(--gray-400);
  cursor: grab;
}

/* ---- SIGNATURE PAD ---- */
.signature-pad-container {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm);
  margin-top: 12px;
}

.signature-pad-container canvas {
  display: block;
  width: 100%;
  cursor: crosshair;
}

/* ---- TABS ---- */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 4px;
}

.tab-btn {
  flex: 1;
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--gray-500);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active {
  background: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* ---- TOAST / NOTIFICATION ---- */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  background: var(--gray-800);
  color: var(--white);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
}

.toast.visible {
  transform: translateY(0);
  opacity: 1;
}

.toast.error {
  background: var(--danger);
}

/* ---- PAGE SELECTOR (for split, rotate etc) ---- */
.page-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.page-chip {
  padding: 6px 14px;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 50px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}

.page-chip.selected {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.page-chip:hover {
  border-color: var(--primary);
}

/* ---- LOADING SPINNER ---- */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--white);
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ---- WATERMARK CONTROLS ---- */
.watermark-preview {
  position: relative;
  display: inline-block;
}

.watermark-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-30deg);
  font-size: 2rem;
  color: rgba(79, 70, 229, 0.3);
  font-weight: 700;
  pointer-events: none;
  white-space: nowrap;
}