/* ============================================================
   Codecraft Signature Manager — Main Stylesheet
   Premium light SaaS design
   ============================================================ */

:root {
  --color-primary:    #1E3A5F;
  --color-accent:     #0EA5E9;
  --color-accent-dark:#0284C7;
  --color-bg:         #F8FAFC;
  --color-card:       #FFFFFF;
  --color-text:       #111827;
  --color-muted:      #6B7280;
  --color-border:     #E5E7EB;
  --color-success:    #10B981;
  --color-error:      #EF4444;
  --color-warning:    #F59E0B;
  --shadow-sm:        0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:        0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg:        0 10px 30px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.04);
  --radius-sm:        6px;
  --radius-md:        10px;
  --radius-lg:        16px;
  --font-sans:        -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --transition:       150ms ease;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ============================================================
   NAV
   ============================================================ */
.nav {
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--color-primary);
  text-decoration: none;
}
.nav-brand-icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
}
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-link {
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover { color: var(--color-primary); background: var(--color-bg); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 1px 3px rgba(30,58,95,.2);
}
.btn-primary:hover { background: #162e4d; box-shadow: var(--shadow-md); color: #fff; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); box-shadow: none; }

.btn-accent {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 1px 3px rgba(14,165,233,.25);
}
.btn-accent:hover { background: var(--color-accent-dark); box-shadow: var(--shadow-md); color: #fff; transform: translateY(-1px); }

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}
.btn-outline:hover { border-color: var(--color-primary); background: var(--color-bg); color: var(--color-primary); }

.btn-ghost {
  background: transparent;
  color: var(--color-muted);
  border: none;
}
.btn-ghost:hover { background: var(--color-bg); color: var(--color-text); }

.btn-success { background: var(--color-success); color: #fff; }
.btn-success:hover { background: #059669; color: #fff; }

.btn-danger { background: var(--color-error); color: #fff; }
.btn-danger:hover { background: #DC2626; color: #fff; }

.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn-lg { padding: 13px 28px; font-size: 15px; }
.btn-icon { padding: 8px; width: 36px; height: 36px; border-radius: var(--radius-sm); }

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--color-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.card-header {
  padding: 20px 24px 0;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 16px;
  margin-bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}
.card-body { padding: 24px; }
.card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* ============================================================
   FORMS
   ============================================================ */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}
.form-label .optional { font-weight: 400; color: var(--color-muted); font-size: 12px; }
.form-control {
  width: 100%;
  padding: 9px 13px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-card);
  transition: border-color var(--transition), box-shadow var(--transition);
  line-height: 1.5;
}
.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(14,165,233,.12);
}
.form-control::placeholder { color: #C0C9D6; }
.form-control:disabled { background: var(--color-bg); color: var(--color-muted); cursor: not-allowed; }
textarea.form-control { resize: vertical; min-height: 90px; }
select.form-control { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B7280' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
.form-hint { font-size: 12px; color: var(--color-muted); margin-top: 5px; }
.form-error { font-size: 12px; color: var(--color-error); margin-top: 5px; }

.form-section-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-muted);
  margin-bottom: 14px;
  margin-top: 4px;
  padding-top: 18px;
  border-top: 1px solid var(--color-border);
}
.form-section-title:first-child { border-top: none; padding-top: 0; margin-top: 0; }

/* Color picker inline */
.color-field-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}
.color-field-wrap input[type=color] {
  width: 40px;
  height: 36px;
  padding: 2px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: none;
}
.color-field-wrap .form-control { flex: 1; }

/* File input */
.file-upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  background: var(--color-bg);
}
.file-upload-zone:hover { border-color: var(--color-accent); background: #EFF9FF; }
.file-upload-zone input[type=file] { display: none; }
.file-upload-zone .upload-icon { font-size: 32px; margin-bottom: 8px; }
.file-upload-zone .upload-text { font-size: 14px; color: var(--color-muted); }
.file-upload-zone .upload-text strong { color: var(--color-accent); }

/* ============================================================
   ALERTS / FLASH
   ============================================================ */
.alert {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 20px;
}
.alert-success { background: #ECFDF5; border: 1px solid #A7F3D0; color: #065F46; }
.alert-error   { background: #FEF2F2; border: 1px solid #FECACA; color: #7F1D1D; }
.alert-info    { background: #EFF6FF; border: 1px solid #BFDBFE; color: #1E40AF; }
.alert-warning { background: #FFFBEB; border: 1px solid #FDE68A; color: #92400E; }
.alert-icon { font-size: 16px; flex-shrink: 0; }

/* ============================================================
   BADGE / CHIP
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.badge-success { background: #D1FAE5; color: #065F46; }
.badge-error   { background: #FEE2E2; color: #7F1D1D; }
.badge-warning { background: #FEF3C7; color: #92400E; }
.badge-gray    { background: #F3F4F6; color: #374151; }
.badge-blue    { background: #DBEAFE; color: #1E40AF; }

/* ============================================================
   TABLES (admin)
   ============================================================ */
.table-wrap { overflow-x: auto; border-radius: var(--radius-md); border: 1px solid var(--color-border); }
table.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data-table thead { background: var(--color-bg); }
table.data-table th {
  padding: 11px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-muted);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}
table.data-table td {
  padding: 13px 16px;
  border-bottom: 1px solid #F3F4F6;
  color: var(--color-text);
  vertical-align: middle;
}
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tbody tr:hover { background: #FAFBFD; }
.table-actions { display: flex; gap: 6px; }

/* ============================================================
   LANDING PAGE
   ============================================================ */
.hero {
  padding: 90px 24px 80px;
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #EFF9FF;
  border: 1px solid #BAE6FD;
  color: #0369A1;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}
.hero h1 {
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 18px;
}
.hero h1 .accent { color: var(--color-accent); }
.hero p {
  font-size: 18px;
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto 36px;
}
.hero-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

.features { max-width: 1100px; margin: 0 auto; padding: 0 24px 80px; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: #EFF9FF;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 14px;
}
.feature-card h3 { font-size: 15px; font-weight: 700; color: var(--color-text); margin-bottom: 6px; }
.feature-card p { font-size: 14px; color: var(--color-muted); line-height: 1.6; }

.section-label {
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-accent);
  margin-bottom: 10px;
}
.section-title {
  text-align: center;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}
.section-subtitle {
  text-align: center;
  font-size: 16px;
  color: var(--color-muted);
  max-width: 520px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

/* ============================================================
   BUILDER LAYOUT
   ============================================================ */
.builder-layout {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 0;
  min-height: calc(100vh - 60px);
}
.builder-form-panel {
  background: var(--color-card);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  max-height: calc(100vh - 60px);
  position: sticky;
  top: 60px;
}
.builder-form-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-card);
  z-index: 10;
}
.builder-form-body { padding: 24px; }
.builder-preview-panel { background: var(--color-bg); padding: 24px; overflow-y: auto; }

.preview-tabs {
  display: flex;
  gap: 4px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px;
  margin-bottom: 20px;
  width: fit-content;
}
.preview-tab {
  padding: 7px 16px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-muted);
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  background: none;
}
.preview-tab.active {
  background: var(--color-primary);
  color: #fff;
}

.preview-frame {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.preview-bar {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.preview-dot { width: 10px; height: 10px; border-radius: 50%; }
.preview-dot-red { background: #FF5F57; }
.preview-dot-yellow { background: #FFBD2E; }
.preview-dot-green { background: #28CA41; }
.preview-body { padding: 24px; overflow-x: auto; }
.preview-body #preview-desktop { min-width: 0; }

/* Mobile preview: scale the 560px signature down to fit the ~350px mobile pane */
.mobile-sig-scaler {
  width: 560px;
  transform-origin: top left;
  /* JS sets transform: scale(N) dynamically based on actual container width */
}
.mobile-sig-scaler-wrap {
  overflow: hidden;
  position: relative;
  min-height: 40px;
  /* JS sets exact height to avoid collapsing after CSS transform */
}
.preview-email-header { margin-bottom: 20px; }
.preview-from { font-size: 13px; color: var(--color-muted); }
.preview-subject { font-size: 16px; font-weight: 600; color: var(--color-text); margin: 4px 0 12px; }
.preview-divider { border: none; border-top: 1px solid var(--color-border); margin: 16px 0; }

.preview-html-box {
  background: #1E2433;
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
}
.preview-html-box code {
  font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', Consolas, monospace;
  font-size: 12px;
  color: #A8D8EA;
  white-space: pre;
  display: block;
}

.builder-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
  background: var(--color-card);
}

/* Template picker */
.template-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}
.template-option {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.template-option:hover { border-color: var(--color-accent); background: #EFF9FF; }
.template-option.selected { border-color: var(--color-accent); background: #EFF9FF; box-shadow: 0 0 0 3px rgba(14,165,233,.12); }
.template-option-name { font-size: 12px; font-weight: 700; color: var(--color-text); margin-top: 6px; }
.template-option-desc { font-size: 11px; color: var(--color-muted); margin-top: 3px; line-height: 1.4; }
.template-option-preview { font-size: 22px; }

/* Image preview */
.img-preview-wrap { margin-top: 10px; position: relative; display: inline-block; }
.img-preview-wrap img { max-height: 80px; border-radius: var(--radius-sm); border: 1px solid var(--color-border); display: block; }
.img-clear-btn {
  position: absolute; top: 4px; right: -10px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--color-error); color: #fff;
  border: none; cursor: pointer; font-size: 14px; line-height: 18px;
  text-align: center; padding: 0;
  box-shadow: 0 1px 3px rgba(0,0,0,.25);
  transition: background var(--transition);
}
.img-clear-btn:hover { background: #c0392b; }
.upload-hint { font-size: 11px; color: var(--color-muted); margin-top: 5px; line-height: 1.4; }
.img-url-display { font-size: 11px; color: var(--color-muted); margin-top: 4px; word-break: break-all; }

/* ============================================================
   GMAIL INSTRUCTIONS
   ============================================================ */
.gmail-steps { counter-reset: step-counter; list-style: none; }
.gmail-step {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}
.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.step-content h3 { font-size: 15px; font-weight: 700; margin-bottom: 4px; color: var(--color-text); }
.step-content p { font-size: 14px; color: var(--color-muted); line-height: 1.6; }

/* ============================================================
   PAGE LAYOUT UTILS
   ============================================================ */
.page-header {
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  padding: 28px 0;
  margin-bottom: 32px;
}
.page-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.page-title { font-size: 22px; font-weight: 800; color: var(--color-primary); }
.page-subtitle { font-size: 14px; color: var(--color-muted); margin-top: 2px; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 640px; margin: 0 auto; padding: 0 24px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  padding: 28px 24px;
  text-align: center;
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 60px;
}
.site-footer a { color: var(--color-accent); }

/* ============================================================
   UTILITY
   ============================================================ */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-muted  { color: var(--color-muted); }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-sm  { font-size: 13px; }
.text-xs  { font-size: 11px; }
.fw-700 { font-weight: 700; }
.mt-4  { margin-top: 4px; }
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.p-24  { padding: 24px; }
.flex  { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.d-none { display: none !important; }
.w-full { width: 100%; }

/* ============================================================
   DIVIDER
   ============================================================ */
.divider { border: none; border-top: 1px solid var(--color-border); margin: 24px 0; }
.divider-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.divider-label::before, .divider-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ============================================================
   COPY FEEDBACK
   ============================================================ */
.copy-feedback {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--color-text);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  transform: translateY(80px);
  opacity: 0;
  transition: all 300ms ease;
  z-index: 9999;
}
.copy-feedback.show { transform: translateY(0); opacity: 1; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .builder-layout { grid-template-columns: 1fr; }
  .builder-form-panel { position: static; max-height: none; border-right: none; border-bottom: 1px solid var(--color-border); }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .template-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .hero { padding: 60px 20px 50px; }
  .nav-inner { padding: 0 16px; }
  .hero h1 { letter-spacing: -0.5px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .builder-actions { flex-direction: column; }
  .builder-actions .btn { width: 100%; }
  .page-header-inner { flex-direction: column; align-items: flex-start; }
}