:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #263449;
  --border: #334155;
  --text: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #10b981;
  --success-hover: #059669;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --dark: #0f172a;
  --radius: 12px;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  padding: 24px 16px;
}

.hidden {
  display: none !important;
}

/* Container & Layout */
.container {
  max-width: 1050px;
  margin: 0 auto;
}

.page-header {
  text-align: center;
  margin-bottom: 24px;
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--primary);
  background: rgba(59, 130, 246, 0.1);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 8px;
}

.page-header h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.muted {
  color: var(--text-muted);
  font-size: 14px;
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.generator-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
}

@media (max-width: 820px) {
  .generator-grid {
    grid-template-columns: 1fr;
  }
}

/* Mode Switches & Notices */
.mode-switch {
  display: flex;
  gap: 12px;
  padding: 8px;
  margin-bottom: 16px;
}

.mode-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mode-btn.active {
  background: var(--primary);
  color: #fff;
}

.notice {
  background: rgba(59, 130, 246, 0.1);
  border-left: 4px solid var(--primary);
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--text);
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #cbd5e1;
}

input, textarea {
  width: 100%;
  background: #0b1329;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

input:focus, textarea:focus {
  border-color: var(--primary);
}

textarea {
  min-height: 70px;
  resize: vertical;
}

.field-help {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.input-with-action {
  display: flex;
  gap: 8px;
}

.social-input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s;
  text-decoration: none;
}

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

.btn.secondary { background: var(--border); color: #fff; }
.btn.secondary:hover { background: #475569; }

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

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

.btn.dark { background: #0b1329; color: #fff; border: 1px solid var(--border); }
.btn.dark:hover { background: #162038; }

.btn.full { width: 100%; }
.btn.small-btn { padding: 6px 10px; font-size: 12px; }

/* Admin Preview Area */
.preview {
  text-align: center;
}

.profile-photo {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 12px auto;
  border: 3px solid var(--primary);
  display: block;
}

.qr-box {
  background: #fff;
  border-radius: 8px;
  padding: 16px;
  margin: 16px auto;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 180px;
  width: fit-content;
}

.qr-box img {
  display: block;
}

.button-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}

.url-box {
  background: #0b1329;
  border: 1px dashed var(--border);
  padding: 8px 12px;
  border-radius: 6px;
  margin: 12px 0;
  word-break: break-all;
  font-size: 13px;
}

.url-box a {
  color: var(--primary);
  text-decoration: none;
}

.success-box {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid var(--success);
  color: #34d399;
  padding: 12px;
  border-radius: 8px;
  margin-top: 14px;
  font-size: 13px;
}

.error-box {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--danger);
  color: #f87171;
  padding: 12px;
  border-radius: 8px;
  margin-top: 14px;
  font-size: 13px;
}

/* Public Profile Page (`profile.html`) */
.profile-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - 48px);
}

.profile {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 24px;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow);
  text-align: center;
}

.profile-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  color: var(--success);
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.profile-avatar {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px auto;
  border: 4px solid var(--bg-card);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  display: block;
}

.profile-avatar-placeholder {
  background: var(--border);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  font-weight: bold;
}

.profile h1 {
  font-size: 22px;
  margin-bottom: 2px;
}

.profile .title {
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 2px;
}

.profile .company {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 18px;
}

.profile-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 24px;
}

.profile-section {
  background: #131d2e;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  text-align: left;
  margin-bottom: 14px;
}

.profile-section h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.contact-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  font-size: 14px;
}

.contact-row a {
  color: var(--text);
  text-decoration: none;
}

.contact-row a:hover {
  color: var(--primary);
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--border);
  color: #fff;
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 6px;
  transition: opacity 0.2s;
}

.social-link:hover {
  opacity: 0.85;
}

.social-linkedin { background: #0a66c2; }
.social-facebook { background: #1877f2; }
.social-x { background: #000000; }
.social-instagram { background: #e1306c; }
.social-youtube { background: #ff0000; }
.social-tiktok { background: #010101; }
.social-wechat { background: #07c160; }

.profile-footer {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 16px;
}

.loading {
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
  padding: 40px;
}