/* ============================================
   Sigify - Main Stylesheet
   Primary: #377ad1 | Secondary: #fefeff
   ============================================ */

:root {
  --primary: #377ad1;
  --primary-dark: #2a62aa;
  --primary-light: #5a94db;
  --secondary: #fefeff;
  --text-dark: #1a1a2e;
  --text-mid: #3a3a5c;
  --text-light: #6b7280;
  --bg-light: #f4f7fc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 4px 20px rgba(55, 122, 209, 0.10);
  --shadow-hover: 0 8px 32px rgba(55, 122, 209, 0.18);
  --radius: 14px;
  --radius-sm: 8px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text-dark);
  background: var(--bg-light);
  line-height: 1.7;
  font-size: 16px;
}

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

img { max-width: 100%; display: block; }

h1, h2, h3, h4, h5 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-dark);
}

p { margin-bottom: 1rem; color: var(--text-mid); }

ul { padding-left: 1.5rem; }
ul li { margin-bottom: 0.4rem; color: var(--text-mid); }

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-track { background: #f1f5f9; }
::-webkit-scrollbar-thumb { background: var(--primary-light); border-radius: 10px; }

/* ============ NAVBAR ============ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #ffffff;
  border-bottom: 2px solid var(--primary);
  box-shadow: 0 2px 16px rgba(55,122,209,0.10);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo span {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border-radius: 6px;
  padding: 2px 9px;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  color: var(--text-mid);
  font-weight: 500;
  font-size: 0.97rem;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: rgba(55,122,209,0.08);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  background: none;
  border: none;
}

.hamburger:hover { background: rgba(55,122,209,0.08); }

.hamburger span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--primary);
  border-radius: 3px;
  transition: var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ============ HERO SECTION ============ */
.hero {
  background: var(--secondary);
  padding: 64px 24px 40px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--text-dark);
  margin-bottom: 14px;
}

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

.hero p {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 640px;
  margin: 0 auto 28px;
}

.badge-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.badge {
  background: rgba(55,122,209,0.08);
  color: var(--primary);
  border: 1px solid rgba(55,122,209,0.2);
  border-radius: 50px;
  padding: 5px 16px;
  font-size: 0.85rem;
  font-weight: 600;
}

/* ============ MAIN CONTENT WRAPPER ============ */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* ============ TOOL CARD ============ */
.tool-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px;
  margin-bottom: 36px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.tool-card:hover { box-shadow: var(--shadow-hover); }

.tool-card h2 {
  font-size: 1.4rem;
  color: var(--primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.tool-card h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 22px;
  background: var(--primary);
  border-radius: 3px;
}

/* ============ DROP ZONE ============ */
.drop-zone {
  border: 2.5px dashed var(--primary-light);
  border-radius: var(--radius);
  padding: 56px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: rgba(55,122,209,0.03);
  position: relative;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--primary);
  background: rgba(55,122,209,0.07);
  transform: scale(1.01);
}

.drop-zone-icon {
  font-size: 3.5rem;
  margin-bottom: 14px;
  display: block;
  transition: var(--transition);
}

.drop-zone:hover .drop-zone-icon { transform: translateY(-4px); }

.drop-zone h3 {
  font-size: 1.25rem;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.drop-zone p {
  color: var(--text-light);
  font-size: 0.95rem;
  margin: 0 0 20px;
}

.drop-zone-sub {
  font-size: 0.82rem;
  color: var(--text-light);
  margin-top: 12px !important;
}

#fileInput { display: none; }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  letter-spacing: 0.3px;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: var(--transition);
}

.btn:hover::after { background: rgba(255,255,255,0.12); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(55,122,209,0.28);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(55,122,209,0.36);
}

.btn-primary:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-success {
  background: #10b981;
  color: #fff;
  box-shadow: 0 4px 14px rgba(16,185,129,0.25);
}

.btn-success:hover {
  background: #059669;
  color: #fff;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 7px 16px;
  font-size: 0.88rem;
  border-radius: 6px;
}

.btn-danger {
  background: #ef4444;
  color: #fff;
}

.btn-danger:hover {
  background: #dc2626;
  color: #fff;
  transform: translateY(-2px);
}

/* ============ QUALITY SLIDER ============ */
.quality-section {
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.quality-section label {
  font-weight: 600;
  color: var(--text-dark);
  white-space: nowrap;
  font-size: 0.95rem;
}

.quality-slider {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: #e2e8f0;
  outline: none;
  flex: 1;
  min-width: 180px;
  cursor: pointer;
  transition: var(--transition);
}

.quality-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(55,122,209,0.3);
  transition: var(--transition);
}

.quality-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }

.quality-val {
  font-weight: 700;
  color: var(--primary);
  min-width: 50px;
  font-size: 1rem;
}

/* ============ ACTION BAR ============ */
.action-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* ============ LOADING ============ */
.loader-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(254,254,255,0.85);
  backdrop-filter: blur(4px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 18px;
}

.loader-overlay.active { display: flex; }

.loader-spinner {
  width: 52px;
  height: 52px;
  border: 5px solid rgba(55,122,209,0.15);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loader-text {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
}

/* ============ PROGRESS BAR ============ */
.progress-container {
  display: none;
  margin-top: 20px;
}

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

.progress-bar-wrap {
  background: #e2e8f0;
  border-radius: 50px;
  height: 10px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 50px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-label {
  font-size: 0.88rem;
  color: var(--text-light);
  text-align: center;
}

/* ============ PREVIEW GRID ============ */
.preview-section {
  margin-top: 32px;
}

.preview-section h3 {
  font-size: 1.15rem;
  margin-bottom: 18px;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 18px;
}

.preview-item {
  background: var(--secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.preview-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.preview-img-wrap {
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  background: #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.preview-item:hover .preview-img-wrap img { transform: scale(1.05); }

.preview-info {
  padding: 10px 12px;
}

.preview-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-dark);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.preview-size {
  font-size: 0.78rem;
  color: var(--text-light);
  margin: 0 0 8px;
}

.preview-status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 50px;
  margin-bottom: 8px;
}

.status-processing {
  background: rgba(55,122,209,0.1);
  color: var(--primary);
}

.status-done {
  background: rgba(16,185,129,0.1);
  color: #059669;
}

.status-error {
  background: rgba(239,68,68,0.1);
  color: #dc2626;
}

.preview-actions {
  display: flex;
  gap: 6px;
}

.preview-remove-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(239,68,68,0.85);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 26px;
  height: 26px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.preview-item:hover .preview-remove-btn { opacity: 1; }

.spinner-sm {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(55,122,209,0.2);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

/* ============ EMPTY STATE ============ */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-light);
}

.empty-state-icon { font-size: 3rem; margin-bottom: 14px; }
.empty-state h3 { color: var(--text-mid); margin-bottom: 8px; }

/* ============ TOAST ============ */
.toast-container {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: #1a1a2e;
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.18);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toastIn 0.3s ease;
  min-width: 240px;
  max-width: 360px;
}

.toast.success { border-left: 4px solid #10b981; }
.toast.error { border-left: 4px solid #ef4444; }
.toast.info { border-left: 4px solid var(--primary); }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(40px); }
}

/* ============ SECTION STYLES ============ */
.section-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 12px;
  color: var(--text-dark);
}

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

.section-sub {
  color: var(--text-light);
  font-size: 1.02rem;
  margin-bottom: 32px;
}

/* ============ SEO CONTENT SECTION ============ */
.seo-section {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 44px 40px;
  margin-bottom: 36px;
  border: 1px solid var(--border);
}

.seo-section h2 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 16px;
  margin-top: 32px;
}

.seo-section h2:first-child { margin-top: 0; }

.seo-section h3 {
  font-size: 1.15rem;
  color: var(--text-dark);
  margin-bottom: 10px;
  margin-top: 24px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
  margin: 24px 0;
}

.feature-item {
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  padding: 20px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.feature-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.feature-icon { font-size: 1.8rem; margin-bottom: 10px; }

.feature-item h4 {
  font-size: 1rem;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.feature-item p {
  font-size: 0.88rem;
  margin: 0;
  color: var(--text-light);
}

/* ============ FAQ SECTION ============ */
.faq-section {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 44px 40px;
  margin-bottom: 36px;
  border: 1px solid var(--border);
}

.faq-list { margin-top: 24px; }

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover { border-color: var(--primary-light); }

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 18px 20px;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
  transition: var(--transition);
}

.faq-question:hover { background: rgba(55,122,209,0.04); color: var(--primary); }

.faq-item.open .faq-question {
  color: var(--primary);
  background: rgba(55,122,209,0.05);
}

.faq-icon {
  font-size: 1.4rem;
  color: var(--primary);
  transition: var(--transition);
  flex-shrink: 0;
  line-height: 1;
}

.faq-item.open .faq-icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.38s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
  padding: 0 20px;
}

.faq-answer p { margin: 0; padding: 4px 0 16px; color: var(--text-mid); }

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 20px;
}

/* ============ ABOUT PAGE ============ */
.about-hero {
  background: var(--secondary);
  padding: 60px 24px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.about-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 14px; }
.about-hero h1 span { color: var(--primary); }
.about-hero p { max-width: 600px; margin: 0 auto; color: var(--text-light); }

.about-content {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 44px 40px;
  margin-bottom: 36px;
  border: 1px solid var(--border);
}

.about-content h2 {
  font-size: 1.4rem;
  color: var(--primary);
  margin: 28px 0 14px;
}

.about-content h2:first-child { margin-top: 0; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 18px;
  margin: 28px 0;
}

.stat-item {
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  padding: 24px 16px;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.stat-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-light);
  font-weight: 500;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.value-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 16px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.value-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow);
}

.value-icon { font-size: 1.5rem; flex-shrink: 0; }

.value-item h4 { font-size: 0.98rem; margin-bottom: 4px; }
.value-item p { font-size: 0.85rem; margin: 0; }

/* ============ CONTACT PAGE ============ */
.contact-hero {
  background: var(--secondary);
  padding: 60px 24px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.contact-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 14px; }
.contact-hero h1 span { color: var(--primary); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 28px;
  margin-bottom: 36px;
}

.contact-info-card,
.contact-form-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 36px;
  border: 1px solid var(--border);
}

.contact-info-card h3 {
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 20px;
}

.contact-info-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.contact-info-item:last-child { border-bottom: none; }

.contact-info-icon { font-size: 1.4rem; flex-shrink: 0; }

.contact-info-item h4 {
  font-size: 0.95rem;
  margin-bottom: 3px;
  color: var(--text-dark);
}

.contact-info-item p { font-size: 0.88rem; margin: 0; }

/* ============ FORM STYLES ============ */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.93rem;
  color: var(--text-dark);
  margin-bottom: 7px;
}

.form-label span { color: #ef4444; margin-left: 3px; }

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.97rem;
  color: var(--text-dark);
  background: var(--secondary);
  transition: var(--transition);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(55,122,209,0.12);
}

.form-input.error,
.form-textarea.error { border-color: #ef4444; }

.form-error {
  display: none;
  color: #ef4444;
  font-size: 0.82rem;
  margin-top: 5px;
}

.form-error.visible { display: block; }

.form-textarea { resize: vertical; min-height: 130px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

/* ============ POLICY PAGES ============ */
.policy-hero {
  background: var(--secondary);
  padding: 60px 24px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.policy-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 10px; }
.policy-hero h1 span { color: var(--primary); }
.policy-hero .policy-date {
  font-size: 0.9rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.policy-content {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 44px 40px;
  margin-bottom: 36px;
  border: 1px solid var(--border);
}

.policy-content h2 {
  font-size: 1.3rem;
  color: var(--primary);
  margin: 30px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(55,122,209,0.12);
}

.policy-content h2:first-child { margin-top: 0; }

.policy-content h3 {
  font-size: 1.05rem;
  color: var(--text-dark);
  margin: 18px 0 8px;
}

.policy-highlight {
  background: rgba(55,122,209,0.06);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 14px 18px;
  margin: 18px 0;
}

.policy-highlight p { margin: 0; font-weight: 500; color: var(--text-mid); }

/* ============ FOOTER ============ */
.footer {
  background: #1a1a2e;
  color: #cbd5e1;
  margin-top: auto;
}

.footer-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 36px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand .footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand .footer-logo span {
  background: var(--primary);
  color: #fff;
  border-radius: 5px;
  padding: 2px 9px;
  font-size: 1rem;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: #94a3b8;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.07);
  color: #94a3b8;
  font-size: 1rem;
  transition: var(--transition);
  text-decoration: none;
}

.social-link:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(55,122,209,0.3);
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li { margin-bottom: 10px; }

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-links a:hover { color: var(--primary-light); padding-left: 4px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 24px;
}

.footer-bottom-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.88rem;
  color: #64748b;
}

.footer-bottom a { color: #64748b; }
.footer-bottom a:hover { color: var(--primary-light); }

/* ============ BREADCRUMB ============ */
.breadcrumb {
  background: var(--secondary);
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
}

.breadcrumb-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
}

.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--primary); font-weight: 500; }

/* ============ ALERT ============ */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.93rem;
}

.alert-success {
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.3);
  color: #065f46;
}

.alert-info {
  background: rgba(55,122,209,0.08);
  border: 1px solid rgba(55,122,209,0.25);
  color: var(--primary-dark);
}

/* ============ BACK TO TOP ============ */
.back-to-top {
  position: fixed;
  bottom: 90px;
  right: 28px;
  z-index: 998;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(55,122,209,0.3);
  transition: var(--transition);
  opacity: 0;
  transform: translateY(20px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(55,122,209,0.4);
}

/* ============ STEP GUIDE ============ */
.steps-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
  margin: 24px 0;
}

.step-card {
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  padding: 24px 18px;
  text-align: center;
  border: 1px solid var(--border);
  position: relative;
  transition: var(--transition);
}

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

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  font-weight: 800;
  font-size: 1.05rem;
  margin-bottom: 14px;
}

.step-card h4 { font-size: 1rem; margin-bottom: 6px; }
.step-card p { font-size: 0.87rem; margin: 0; }

/* ============ PAGE NOT FOUND ============ */
.page-hero {
  background: var(--secondary);
  padding: 60px 24px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 14px; }
.page-hero h1 span { color: var(--primary); }
.page-hero p { color: var(--text-light); max-width: 600px; margin: 0 auto; }

/* ============ DIVIDER ============ */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 28px 0;
}

/* ============ MOBILE RESPONSIVE ============ */
@media (max-width: 1024px) {
  .footer-main { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 16px 20px;
    flex-direction: column;
    gap: 4px;
    border-bottom: 2px solid var(--primary);
    box-shadow: 0 8px 24px rgba(0,0,0,0.10);
  }

  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 12px 14px; border-radius: var(--radius-sm); }

  .hero { padding: 40px 20px 28px; }
  .tool-card, .seo-section, .faq-section { padding: 24px 20px; }
  .about-content, .contact-form-card, .contact-info-card { padding: 24px 20px; }
  .policy-content { padding: 24px 20px; }

  .action-bar { flex-direction: column; align-items: stretch; }
  .action-bar .btn { width: 100%; justify-content: center; }

  .form-row { grid-template-columns: 1fr; }

  .footer-main { grid-template-columns: 1fr; gap: 28px; padding: 40px 20px 28px; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }

  .preview-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }

  .quality-section { flex-direction: column; align-items: stretch; }
  .quality-slider { min-width: 100%; }
}

@media (max-width: 480px) {
  .preview-grid { grid-template-columns: 1fr 1fr; }
  .steps-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .back-to-top { right: 16px; bottom: 80px; }
  .toast-container { right: 12px; bottom: 16px; }
}