:root {
  --sig-primary:    #2563eb;
  --sig-primary-dk: #1d4ed8;
  --sig-accent:     #3b82f6;
  --sig-text:       #1e293b;
  --sig-muted:      #64748b;
  --sig-border:     #e2e8f0;
  --sig-bg-soft:    #f8fafc;
  --sig-bg-blue:    #eff6ff;
  --sig-radius:     12px;
  --sig-radius-sm:  8px;
  --sig-shadow:     0 4px 24px rgba(37, 99, 235, 0.10);
  --sig-amber:      #f59e0b;
  --sig-green:      #10b981;
}

/* ---------- HERO ---------- */
.sig-hero {
  background: linear-gradient(135deg, #2563eb 0%, #3b82f6 50%, #60a5fa 100%);
  color: #fff;
  padding: 60px 0 50px;
  text-align: center;
}

.sig-hero .container { max-width: 760px; }

.sig-pill {
  display: inline-block;
  background: rgba(255,255,255,0.18);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 16px;
  border-radius: 50px;
  margin-bottom: 14px;
  border: 1px solid rgba(255,255,255,0.3);
}

.sig-hero h1 {
  color: #fff;
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.2;
}

.sig-hero p {
  color: rgba(255,255,255,0.95);
  font-size: 1.08rem;
  line-height: 1.65;
  max-width: 700px;
  margin: 0 auto;
}

/* ---------- GENERATOR WRAP ---------- */
.sig-generator { padding: 40px 0 60px; background: var(--sig-bg-soft); }

.sig-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

.sig-top-ad,
.sig-bottom-ad {
  margin-bottom: 24px;
  text-align: center;
}

.sig-bottom-ad { margin-top: 24px; margin-bottom: 0; }

/* ---------- TWO-COLUMN WORKSPACE ---------- */
.sig-workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.sig-builder-col,
.sig-preview-col {
  min-width: 0;  /* prevent grid blow-out */
}

.sig-preview-col {
  position: sticky;
  top: 20px;
}

/* ---------- BUILDER ---------- */
.sig-builder {
  background: #fff;
  border-radius: var(--sig-radius);
  box-shadow: var(--sig-shadow);
  overflow: hidden;
}

/* TABS */
.sig-tabs {
  display: flex;
  flex-wrap: wrap;
  background: var(--sig-bg-blue);
  border-bottom: 1px solid var(--sig-border);
}

.sig-tab {
  flex: 1;
  min-width: 90px;
  padding: 13px 10px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--sig-muted);
  border-bottom: 3px solid transparent;
  transition: all 0.15s;
}

.sig-tab:hover { background: rgba(255,255,255,0.5); color: var(--sig-text); }

.sig-tab.active {
  background: #fff;
  color: var(--sig-primary);
  border-bottom-color: var(--sig-primary);
}

/* TAB PANELS */
.sig-tab-panel { display: none; padding: 24px 22px; }
.sig-tab-panel.active { display: block; }

.sig-field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}

.sig-field { margin-bottom: 14px; }
.sig-field:last-child { margin-bottom: 0; }
.sig-field-row .sig-field { margin-bottom: 0; }

.sig-field label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: #374151;
  margin-bottom: 6px;
}

.sig-field input[type="text"],
.sig-field input[type="email"],
.sig-field input[type="tel"],
.sig-field input[type="url"],
.sig-field select,
.sig-field textarea {
  width: 100%;
  padding: 10px 12px;
  font-size: 0.92rem;
  border: 1px solid #cbd5e1;
  border-radius: var(--sig-radius-sm);
  background: #fff;
  color: var(--sig-text);
  transition: border-color 0.15s, box-shadow 0.15s;
  box-sizing: border-box;
  font-family: inherit;
}

.sig-field input:focus,
.sig-field select:focus,
.sig-field textarea:focus {
  outline: none;
  border-color: var(--sig-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.sig-field input[type="color"] {
  width: 100%;
  height: 42px;
  padding: 4px;
  border: 1px solid #cbd5e1;
  border-radius: var(--sig-radius-sm);
  cursor: pointer;
  background: #fff;
}

.sig-field input[type="checkbox"] {
  margin-right: 8px;
  vertical-align: middle;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.sig-field textarea {
  font-family: "Courier New", monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  resize: vertical;
}

.sig-field small {
  display: block;
  margin-top: 5px;
  color: var(--sig-muted);
  font-size: 0.78rem;
}

/* URL NOTICE box in Visuals tab */
.sig-url-notice {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-left: 4px solid var(--sig-primary);
  color: #1e3a8a;
  font-size: 0.85rem;
  line-height: 1.55;
  padding: 11px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
}

/* ---------- PREVIEW ---------- */
.sig-preview-wrap {
  background: #fff;
  border-radius: var(--sig-radius);
  box-shadow: var(--sig-shadow);
  margin-bottom: 24px;
  overflow: hidden;
}

.sig-preview-label {
  background: var(--sig-bg-blue);
  padding: 14px 22px;
  border-bottom: 1px solid var(--sig-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sig-preview-label h3 {
  margin: 0;
  font-size: 1rem;
  color: var(--sig-text);
  font-weight: 700;
}

.sig-preview-tag {
  font-size: 0.74rem;
  background: var(--sig-green);
  color: #fff;
  padding: 3px 10px;
  border-radius: 50px;
  font-weight: 500;
}

.sig-preview {
  padding: 28px 24px;
  background: #fafbfc;
  min-height: 200px;
  overflow-x: auto;
}

/* ---------- OUTPUT ---------- */
.sig-output-wrap {
  background: #fff;
  border-radius: var(--sig-radius);
  box-shadow: var(--sig-shadow);
  overflow: hidden;
}

.sig-output-tabs {
  display: flex;
  background: #1e293b;
}

.sig-out-tab {
  flex: 1;
  padding: 13px 8px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  color: #94a3b8;
  border-bottom: 3px solid transparent;
  transition: all 0.15s;
}

.sig-out-tab:hover { color: #fff; }

.sig-out-tab.active {
  color: #fff;
  background: #0f172a;
  border-bottom-color: var(--sig-accent);
}

.sig-output-body { padding: 18px 20px 20px; }

#sig-output-code {
  width: 100%;
  min-height: 180px;
  padding: 12px;
  font-family: "Courier New", monospace;
  font-size: 0.78rem;
  border: 1px solid var(--sig-border);
  border-radius: var(--sig-radius-sm);
  background: #f8fafc;
  color: #334155;
  resize: vertical;
  box-sizing: border-box;
  line-height: 1.5;
}

.sig-output-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.sig-btn {
  padding: 10px 14px;
  border: none;
  border-radius: var(--sig-radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  flex: 1;
  min-width: 90px;
}

.sig-btn-primary { background: var(--sig-primary); color: #fff; }
.sig-btn-primary:hover { background: var(--sig-primary-dk); }
.sig-btn-primary.copied { background: var(--sig-green); }

.sig-btn-secondary {
  background: #fff;
  color: var(--sig-primary);
  border: 1px solid var(--sig-primary);
}
.sig-btn-secondary:hover { background: var(--sig-bg-blue); }

.sig-btn-ghost {
  background: #fff;
  color: var(--sig-muted);
  border: 1px solid var(--sig-border);
}
.sig-btn-ghost:hover { background: #f1f5f9; color: var(--sig-text); }

/* ---------- SAMPLE SHOWCASE — CAROUSEL ---------- */
.sig-samples-wrap {
  margin-top: 24px;
  background: #fff;
  border-radius: var(--sig-radius);
  box-shadow: var(--sig-shadow);
  overflow: hidden;
}

.sig-samples-header {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  padding: 18px 22px;
  border-bottom: 1px solid #fcd34d;
}

.sig-samples-header h3 {
  margin: 0 0 4px;
  font-size: 1rem;
  font-weight: 700;
  color: #78350f;
}

.sig-samples-header p {
  margin: 0;
  font-size: 0.85rem;
  color: #92400e;
  line-height: 1.5;
}

/* Carousel container */
.sig-carousel {
  position: relative;
  padding: 22px 0 14px;
  background: #fafbfc;
}

.sig-carousel-track {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: 4px 50px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.sig-carousel-track::-webkit-scrollbar { height: 6px; }
.sig-carousel-track::-webkit-scrollbar-track { background: transparent; }
.sig-carousel-track::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 50px;
}

/* Carousel arrows */
.sig-carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--sig-border);
  color: var(--sig-primary);
  font-size: 1.5rem;
  font-weight: 700;
  cursor: pointer;
  z-index: 5;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transition: all 0.18s;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  padding: 0;
}

.sig-carousel-arrow:hover {
  background: var(--sig-primary);
  color: #fff;
  border-color: var(--sig-primary);
  transform: translateY(-50%) scale(1.08);
}

.sig-carousel-arrow:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: translateY(-50%);
}

.sig-carousel-arrow:disabled:hover {
  background: #fff;
  color: var(--sig-primary);
  border-color: var(--sig-border);
  transform: translateY(-50%);
}

.sig-carousel-prev { left: 6px; }
.sig-carousel-next { right: 6px; }

/* Sample card */
.sig-sample {
  flex: 0 0 calc(50% - 7px);
  min-width: 240px;
  background: #fff;
  border: 1px solid var(--sig-border);
  border-radius: var(--sig-radius-sm);
  padding: 16px 14px 14px;
  scroll-snap-align: start;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
}

.sig-sample:hover {
  border-color: var(--sig-primary);
  box-shadow: 0 6px 18px rgba(37,99,235,0.12);
  transform: translateY(-3px);
}

.sig-sample-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--sig-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.sig-sample-preview {
  background: #fafbfc;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 14px 12px;
  margin-bottom: 12px;
  min-height: 110px;
  flex: 1;
  overflow: hidden;
}

.sig-sample-use {
  width: 100%;
  background: var(--sig-bg-blue);
  color: var(--sig-primary);
  border: 1px solid var(--sig-primary);
  padding: 9px 14px;
  border-radius: var(--sig-radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.sig-sample-use:hover {
  background: var(--sig-primary);
  color: #fff;
}

/* Dots indicator */
.sig-carousel-dots {
  display: flex;
  justify-content: center;
  gap: 7px;
  padding: 14px 0 18px;
  background: #fafbfc;
}

.sig-carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #cbd5e1;
  border: none;
  cursor: pointer;
  transition: all 0.18s;
  padding: 0;
}

.sig-carousel-dot:hover { background: #94a3b8; }

.sig-carousel-dot.active {
  background: var(--sig-primary);
  width: 22px;
  border-radius: 50px;
}

/* Mobile: 1 card at a time */
@media (max-width: 600px) {
  .sig-sample { flex: 0 0 calc(100% - 40px); }
  .sig-carousel-track { padding: 4px 20px; }
  .sig-carousel-prev { left: -4px; }
  .sig-carousel-next { right: -4px; }
}

/* ---------- SUPPORTED CLIENTS ---------- */
.sig-supported {
  background: #fff;
  padding: 50px 0 40px;
}

.sig-supported h2 {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--sig-text);
  text-align: center;
  margin-bottom: 14px;
}

.sig-clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 28px;
}

.sig-client {
  background: var(--sig-bg-soft);
  border: 1px solid var(--sig-border);
  padding: 12px 16px;
  border-radius: var(--sig-radius-sm);
  font-size: 0.88rem;
  color: var(--sig-text);
  font-weight: 500;
  transition: all 0.18s;
}

.sig-client:hover {
  border-color: var(--sig-primary);
  background: var(--sig-bg-blue);
  transform: translateY(-2px);
  box-shadow: 0 2px 8px rgba(37,99,235,0.10);
}

/* ---------- SEO SECTION ---------- */
.sig-seo-section { padding: 60px 0 40px; background: var(--sig-bg-soft); }
.sig-section-intro { text-align: center; color: var(--sig-muted); max-width: 720px; margin: 0 auto 30px; line-height: 1.7; }

/* INSTALL CARDS */
.sig-install { margin-bottom: 60px; }
.sig-install h2 {
  font-size: 1.7rem; font-weight: 700; color: var(--sig-text);
  text-align: center; margin-bottom: 14px;
}

.sig-install-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.sig-install-card {
  background: #fff;
  border: 1px solid var(--sig-border);
  border-radius: var(--sig-radius);
  padding: 24px 22px;
  border-top: 4px solid var(--sig-primary);
  transition: transform 0.2s, box-shadow 0.2s;
}

.sig-install-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.sig-card-gmail       { border-top-color: #ea4335; }
.sig-card-outlook     { border-top-color: #0078d4; }
.sig-card-outlook2    { border-top-color: #0078d4; }
.sig-card-apple       { border-top-color: #000; }
.sig-card-yahoo       { border-top-color: #6001d2; }
.sig-card-aol         { border-top-color: #0060ff; }
.sig-card-zoho        { border-top-color: #e42527; }
.sig-card-thunderbird { border-top-color: #00aef0; }
.sig-card-mobile      { border-top-color: #4caf50; }

.sig-install-icon { display: none; }

.sig-install-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--sig-text);
  margin: 0 0 14px 0;
}

.sig-install-card ol {
  margin: 0;
  padding-left: 20px;
  color: var(--sig-muted);
}

.sig-install-card ol li {
  font-size: 0.87rem;
  line-height: 1.6;
  margin-bottom: 6px;
}

/* BENEFITS */
.sig-benefits { margin-bottom: 60px; }
.sig-benefits h2 {
  font-size: 1.7rem; font-weight: 700; color: var(--sig-text);
  text-align: center; margin-bottom: 30px;
}

.sig-benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

.sig-benefit {
  background: #fff;
  border: 1px solid var(--sig-border);
  border-radius: var(--sig-radius);
  padding: 26px 22px;
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
  overflow: hidden;
}

.sig-benefit::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--sig-primary), var(--sig-accent));
  opacity: 0;
  transition: opacity 0.22s;
}

.sig-benefit:hover { transform: translateY(-3px); box-shadow: var(--sig-shadow); }
.sig-benefit:hover::before { opacity: 1; }

.sig-benefit-icon { display: none; }
.sig-benefit h3 { font-size: 1.02rem; font-weight: 700; color: var(--sig-text); margin: 0 0 8px 0; }
.sig-benefit p { font-size: 0.92rem; color: var(--sig-muted); line-height: 1.6; margin: 0; }

/* ADVICE */
.sig-advice {
  background: #fff;
  border-radius: var(--sig-radius);
  padding: 36px 32px;
  margin-bottom: 60px;
}

.sig-advice h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--sig-text);
  text-align: center;
  margin-bottom: 20px;
}

.sig-advice h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--sig-text);
  margin: 22px 0 8px;
}

.sig-advice p {
  font-size: 0.94rem;
  color: var(--sig-muted);
  line-height: 1.75;
  margin-bottom: 10px;
}

.sig-tip-box {
  background: #fffbeb;
  border-left: 4px solid var(--sig-amber);
  border-radius: 0 8px 8px 0;
  padding: 14px 18px;
  margin: 18px 0;
  font-size: 0.92rem;
  color: #78350f;
  line-height: 1.65;
}

/* FAQ */
.sig-faq { margin-bottom: 60px; }
.sig-faq h2 {
  font-size: 1.55rem; font-weight: 700; color: var(--sig-text);
  text-align: center; margin-bottom: 24px;
}

.sig-faq-item {
  border: 1px solid var(--sig-border);
  border-radius: var(--sig-radius);
  margin-bottom: 10px;
  overflow: hidden;
  background: #fff;
}

.sig-faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 18px 22px;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--sig-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  transition: background 0.15s;
}

.sig-faq-q:hover { background: var(--sig-bg-soft); }
.sig-faq-q.active { background: var(--sig-bg-blue); color: var(--sig-primary); }

.sig-chev { font-size: 1.1rem; flex-shrink: 0; transition: transform 0.25s; }
.sig-faq-q.active .sig-chev { transform: rotate(180deg); }

.sig-faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s, padding 0.25s;
  padding: 0 22px;
}

.sig-faq-a.open { max-height: 600px; padding: 0 22px 18px; }

.sig-faq-a p {
  font-size: 0.92rem;
  color: var(--sig-muted);
  line-height: 1.7;
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--sig-border);
}

/* CTA BANNER */
.sig-cta-banner {
  background: linear-gradient(135deg, var(--sig-primary), var(--sig-accent));
  border-radius: var(--sig-radius);
  padding: 36px 28px;
  text-align: center;
  color: #fff;
}

.sig-cta-banner h2 { color: #fff; font-size: 1.5rem; font-weight: 700; margin-bottom: 10px; }
.sig-cta-banner p { color: rgba(255,255,255,0.92); font-size: 0.97rem; margin-bottom: 22px; }

.sig-cta-btn {
  display: inline-block;
  background: #fff;
  color: var(--sig-primary);
  font-weight: 700;
  padding: 13px 32px;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s;
}

.sig-cta-btn:hover {
  color: var(--sig-primary-dk);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
  text-decoration: none;
}

/* ============================================
   RESPONSIVE
   ============================================ */

/* Tablets: stack the two columns */
@media (max-width: 991px) {
  .sig-workspace {
    grid-template-columns: 1fr;
  }
  .sig-preview-col {
    position: static;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .sig-hero { padding: 40px 0 36px; }
  .sig-hero h1 { font-size: 1.7rem; }
  .sig-hero p { font-size: 0.95rem; }
  .sig-field-row { grid-template-columns: 1fr; }
  .sig-tab { min-width: 80px; font-size: 0.76rem; padding: 11px 6px; }
  .sig-tab-panel { padding: 20px 16px; }
  .sig-output-actions .sig-btn { flex: 1; min-width: 100%; }
  .sig-advice { padding: 24px 18px; }
  .sig-clients-grid { grid-template-columns: 1fr 1fr; }
}

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