/* =====================================================================
   Online PDF Tools – Main Stylesheet
   SaaS-style, mobile-first, modern UI
   ===================================================================== */

:root {
  --opt-primary:   #e84545;
  --opt-primary-h: #c73737;
  --opt-dark:      #1a1a2e;
  --opt-mid:       #16213e;
  --opt-accent:    #0f3460;
  --opt-light:     #f5f7fa;
  --opt-border:    #e2e8f0;
  --opt-text:      #2d3748;
  --opt-muted:     #718096;
  --opt-white:     #ffffff;
  --opt-success:   #48bb78;
  --opt-warning:   #ed8936;
  --opt-error:     #e53e3e;
  --opt-radius:    12px;
  --opt-shadow:    0 4px 24px rgba(0,0,0,.08);
  --opt-shadow-h:  0 8px 32px rgba(0,0,0,.14);
  --opt-font:      -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --opt-transition: 0.22s cubic-bezier(.4,0,.2,1);
}

/* ─── Reset / Base ────────────────────────────────────────────────────────── */
.opt-wrap *, .opt-wrap *::before, .opt-wrap *::after {
  box-sizing: border-box;
}
.opt-wrap {
  font-family: var(--opt-font);
  color: var(--opt-text);
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 60px;
  background: var(--opt-light);
  min-height: 100vh;
}

/* ─── Header ──────────────────────────────────────────────────────────────── */
.opt-header {
  text-align: center;
  padding: 40px 0 24px;
}
.opt-header h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--opt-dark);
  margin: 0 0 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.opt-logo { font-size: 2.2rem; }
.opt-tagline {
  color: var(--opt-muted);
  font-size: 1.05rem;
  margin: 0;
}
.opt-back-link {
  display: inline-block;
  color: var(--opt-primary);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 12px;
  transition: opacity var(--opt-transition);
}
.opt-back-link:hover { opacity: 0.7; }

/* ─── Section Title ───────────────────────────────────────────────────────── */
.opt-section-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--opt-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin: 36px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--opt-border);
}

/* ─── Grid ────────────────────────────────────────────────────────────────── */
.opt-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 8px;
}
.opt-grid-sm {
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}

/* ─── Card ────────────────────────────────────────────────────────────────── */
.opt-card {
  background: var(--opt-white);
  border-radius: var(--opt-radius);
  padding: 20px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--opt-text);
  box-shadow: var(--opt-shadow);
  border: 2px solid transparent;
  transition: all var(--opt-transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.opt-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--card-color, var(--opt-primary));
  border-radius: 4px 0 0 4px;
  transition: width var(--opt-transition);
}
.opt-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--opt-shadow-h);
  border-color: var(--card-color, var(--opt-primary));
}
.opt-card:hover::before { width: 6px; }

.opt-card-icon {
  font-size: 2rem;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--card-color, var(--opt-primary)) 12%, white);
  border-radius: 10px;
}
.opt-card-body {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.opt-card-body strong {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--opt-dark);
}
.opt-card-body span {
  font-size: 0.8rem;
  color: var(--opt-muted);
  line-height: 1.35;
}

/* Small cards */
.opt-card-sm {
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 16px 12px;
  gap: 8px;
}
.opt-card-sm .opt-card-body strong { font-size: 0.85rem; }

/* ─── Tool Container ──────────────────────────────────────────────────────── */
.opt-tool-container {
  background: var(--opt-white);
  border-radius: var(--opt-radius);
  padding: 32px;
  box-shadow: var(--opt-shadow);
  max-width: 680px;
  margin: 0 auto;
}

/* ─── Drop Zone ───────────────────────────────────────────────────────────── */
.opt-drop-zone {
  border: 2px dashed var(--opt-border);
  border-radius: var(--opt-radius);
  background: var(--opt-light);
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--opt-transition);
  margin-bottom: 20px;
}
.opt-drop-zone:hover,
.opt-drop-zone.drag-over {
  border-color: var(--opt-primary);
  background: color-mix(in srgb, var(--opt-primary) 5%, white);
}
.opt-drop-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.opt-drop-icon {
  font-size: 3rem;
  display: block;
}
.opt-drop-zone p {
  color: var(--opt-muted);
  margin: 0;
  font-size: 0.95rem;
}

/* ─── File List ───────────────────────────────────────────────────────────── */
.opt-file-list {
  margin-bottom: 20px;
}
.opt-file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--opt-light);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 8px;
  font-size: 0.9rem;
}
.opt-file-item span { color: var(--opt-muted); font-size: 0.8rem; }
.opt-file-remove {
  background: none;
  border: none;
  color: var(--opt-error);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0 4px;
  line-height: 1;
}

/* ─── Extra Fields ────────────────────────────────────────────────────────── */
.opt-fields { margin-bottom: 20px; }
.opt-field-group { margin-bottom: 16px; }
.opt-field-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--opt-text);
  margin-bottom: 6px;
}
.opt-input, .opt-select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--opt-border);
  border-radius: 8px;
  font-size: 0.95rem;
  color: var(--opt-text);
  background: var(--opt-white);
  transition: border-color var(--opt-transition);
  outline: none;
}
.opt-input:focus, .opt-select:focus {
  border-color: var(--opt-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--opt-primary) 15%, transparent);
}
.opt-input-full { width: 100%; }

/* Range */
.opt-range-wrap { display: flex; align-items: center; gap: 12px; }
.opt-range-wrap input[type=range] { flex: 1; accent-color: var(--opt-primary); }
.opt-range-val {
  min-width: 36px;
  text-align: center;
  font-weight: 700;
  color: var(--opt-primary);
}

/* ─── Buttons ─────────────────────────────────────────────────────────────── */
.opt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--opt-transition);
  white-space: nowrap;
}
.opt-btn-primary {
  background: var(--opt-primary);
  color: var(--opt-white);
}
.opt-btn-primary:hover { background: var(--opt-primary-h); transform: translateY(-1px); }
.opt-btn-success {
  background: var(--opt-success);
  color: var(--opt-white);
}
.opt-btn-success:hover { opacity: 0.9; }
.opt-btn-outline {
  background: transparent;
  color: var(--opt-primary);
  border: 2px solid var(--opt-primary);
}
.opt-btn-outline:hover { background: var(--opt-primary); color: var(--opt-white); }
.opt-btn-ghost {
  background: transparent;
  color: var(--opt-muted);
  border: 1.5px solid var(--opt-border);
}
.opt-btn-ghost:hover { border-color: var(--opt-muted); color: var(--opt-text); }
.opt-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

/* ─── Progress ────────────────────────────────────────────────────────────── */
.opt-progress-wrap { margin: 24px 0; }
.opt-progress-bar {
  height: 8px;
  background: var(--opt-border);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 10px;
}
.opt-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--opt-primary), #ff6b6b);
  border-radius: 99px;
  transition: width 0.4s ease;
  animation: opt-pulse 1.5s ease-in-out infinite;
}
@keyframes opt-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.7; }
}
.opt-progress-label {
  text-align: center;
  color: var(--opt-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* ─── Result ──────────────────────────────────────────────────────────────── */
.opt-result-wrap { margin: 20px 0; }
.opt-result-box {
  display: flex;
  align-items: center;
  gap: 16px;
  background: color-mix(in srgb, var(--opt-success) 8%, white);
  border: 1.5px solid color-mix(in srgb, var(--opt-success) 30%, white);
  border-radius: var(--opt-radius);
  padding: 16px 20px;
}
.opt-result-icon { font-size: 2rem; }
.opt-result-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.opt-result-info strong { font-size: 0.95rem; color: var(--opt-dark); }
.opt-result-info span   { font-size: 0.82rem; color: var(--opt-muted); }

/* ─── Error ───────────────────────────────────────────────────────────────── */
.opt-error-wrap {
  background: color-mix(in srgb, var(--opt-error) 8%, white);
  border: 1.5px solid color-mix(in srgb, var(--opt-error) 25%, white);
  border-radius: 8px;
  padding: 14px 18px;
  color: var(--opt-error);
  font-size: 0.9rem;
}
.opt-error-wrap p { margin: 0; }

/* ─── Shortcode Box ───────────────────────────────────────────────────────── */
.opt-shortcode-box {
  max-width: 680px;
  margin: 20px auto 0;
  background: var(--opt-white);
  border-radius: var(--opt-radius);
  padding: 18px 24px;
  box-shadow: var(--opt-shadow);
  border-left: 4px solid var(--opt-accent);
}
.opt-shortcode-box code {
  display: inline-block;
  background: var(--opt-light);
  padding: 4px 10px;
  border-radius: 6px;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  color: var(--opt-accent);
  margin: 6px 0;
}
.opt-shortcode-desc { color: var(--opt-muted); font-size: 0.85rem; margin: 6px 0 0; }

/* ─── Settings ────────────────────────────────────────────────────────────── */
.opt-status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}
.opt-status-card {
  background: var(--opt-white);
  border-radius: var(--opt-radius);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: var(--opt-shadow);
  border-left: 4px solid transparent;
}
.opt-status-card.ok   { border-color: var(--opt-success); }
.opt-status-card.warn { border-color: var(--opt-warning); }
.opt-status-card span  { font-size: 1.4rem; }
.opt-status-card strong { font-size: 0.95rem; color: var(--opt-dark); }
.opt-status-card small  { font-size: 0.8rem; color: var(--opt-muted); }

.opt-settings-form { max-width: 720px; }
.opt-settings-section {
  background: var(--opt-white);
  border-radius: var(--opt-radius);
  padding: 24px 28px;
  margin-bottom: 20px;
  box-shadow: var(--opt-shadow);
}
.opt-settings-section h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--opt-dark);
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1.5px solid var(--opt-border);
}
.opt-help { color: var(--opt-muted); font-size: 0.88rem; margin: -8px 0 14px; }
.opt-field-note { color: var(--opt-muted); font-size: 0.82rem; margin: 4px 0 0; }
.opt-install-guide { background: var(--opt-light); border-radius: 8px; padding: 16px 18px; }
.opt-install-guide h4 { margin: 0 0 6px; font-size: 0.88rem; color: var(--opt-muted); }
.opt-install-guide pre {
  background: var(--opt-dark);
  color: #a8ff78;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  overflow-x: auto;
  margin: 0 0 12px;
}
.form-table th { font-weight: 600; font-size: 0.9rem; }

/* Toggle */
.opt-toggle { position: relative; display: inline-block; width: 48px; height: 26px; }
.opt-toggle input { opacity: 0; width: 0; height: 0; }
.opt-toggle-slider {
  position: absolute; inset: 0;
  background: var(--opt-border);
  border-radius: 99px;
  cursor: pointer;
  transition: background var(--opt-transition);
}
.opt-toggle-slider::before {
  content: '';
  position: absolute;
  width: 20px; height: 20px;
  left: 3px; top: 3px;
  background: white;
  border-radius: 50%;
  transition: transform var(--opt-transition);
  box-shadow: 0 2px 4px rgba(0,0,0,.2);
}
.opt-toggle input:checked + .opt-toggle-slider { background: var(--opt-success); }
.opt-toggle input:checked + .opt-toggle-slider::before { transform: translateX(22px); }

/* ─── Modal ───────────────────────────────────────────────────────────────── */
.opt-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(4px);
}
.opt-modal-inner {
  background: var(--opt-white);
  border-radius: var(--opt-radius);
  padding: 32px;
  width: 100%;
  max-width: 520px;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
  animation: opt-modal-in .25s ease;
}
@keyframes opt-modal-in {
  from { transform: scale(0.92); opacity: 0; }
  to   { transform: scale(1);    opacity: 1; }
}
.opt-modal-close {
  position: absolute; top: 16px; right: 16px;
  background: none; border: none;
  font-size: 1.1rem; cursor: pointer;
  color: var(--opt-muted);
  transition: color var(--opt-transition);
}
.opt-modal-close:hover { color: var(--opt-error); }
.opt-modal-inner h3 { margin: 0 0 20px; font-size: 1.15rem; color: var(--opt-dark); }

/* ─── Footer ──────────────────────────────────────────────────────────────── */
.opt-footer {
  text-align: center;
  margin-top: 48px;
  color: var(--opt-muted);
  font-size: 0.82rem;
}

/* ─── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .opt-wrap { padding: 16px 14px 40px; }
  .opt-header h1 { font-size: 1.5rem; }
  .opt-tool-container { padding: 20px 16px; }
  .opt-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .opt-result-box { flex-direction: column; text-align: center; }
  .opt-actions { flex-direction: column; }
  .opt-btn { width: 100%; }
}
@media (max-width: 480px) {
  .opt-grid { grid-template-columns: 1fr 1fr; }
  .opt-card { padding: 14px 10px; gap: 10px; }
  .opt-card-icon { width: 38px; height: 38px; font-size: 1.4rem; }
}

/* ─── WordPress Admin overrides ───────────────────────────────────────────── */
.wp-admin .opt-wrap { background: #f0f0f1; }
.wp-admin .opt-tool-container,
.wp-admin .opt-card,
.wp-admin .opt-settings-section,
.wp-admin .opt-shortcode-box { box-shadow: 0 1px 8px rgba(0,0,0,.08); }