@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@600;700;800;900&family=Poppins:wght@400;500;600&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ============================================
   Log Base 10 Calculator - by Yaseen
   ============================================ */

.lgc-wrapper {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
  font-family: 'Poppins', sans-serif;
  background: #ffffff;
  box-sizing: border-box;
}

/* Header */
.lgc-header { text-align: center; margin-bottom: 28px; }

.lgc-badge {
  display: inline-block;
  background: #ffffff;
  border: 1.5px solid #0EA5E9;
  color: #0EA5E9;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  padding: 5px 16px;
  border-radius: 100px;
  margin-bottom: 14px;
  font-family: 'Poppins', sans-serif;
}

.lgc-title {
  font-family: 'Montserrat', sans-serif !important;
  font-size: 2.2rem !important;
  font-weight: 900 !important;
  color: #0f172a !important;
  margin: 0 0 10px 0 !important;
  padding: 0 !important;
  line-height: 1.1 !important;
  letter-spacing: -0.5px;
}

.lgc-subtitle {
  color: #64748b;
  font-size: 0.88rem;
  margin: 0 auto !important;
  font-family: 'Poppins', sans-serif;
  max-width: 560px;
  line-height: 1.6;
}

/* Card */
.lgc-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 20px;
  padding: 28px;
  margin-bottom: 20px;
  box-shadow: 0 2px 20px rgba(14,165,233,0.07);
  box-sizing: border-box;
}

/* Quick Examples */
.lgc-quick-section {
  border: 1.5px dashed #cbd5e1;
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 24px;
  background: #fafcff;
}

.lgc-quick-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: #0EA5E9;
  margin: 0 0 12px 0 !important;
  font-family: 'Poppins', sans-serif;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.lgc-quick-btns { display: flex; flex-wrap: wrap; gap: 10px; }
.lgc-quick-btns-row2 { margin-top: 10px; }

.lgc-quick-btn {
  padding: 9px 22px;
  border-radius: 8px;
  border: 1.5px solid #0EA5E9;
  background: #0EA5E9;
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: 'Poppins', sans-serif;
}

.lgc-quick-btn:hover { background: #0284C7; border-color: #0284C7; transform: translateY(-1px); }

/* Mode Selector Cards */
.lgc-mode-cards {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
  margin: 24px 0;
}

.lgc-mode-card {
  border: 2px solid #e2e8f0;
  border-radius: 16px;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  background: #ffffff;
}

.lgc-mode-card:hover { border-color: #0EA5E9; }

.lgc-mode-card.active {
  border-color: #0EA5E9;
  background: #f0f9ff;
  box-shadow: 0 4px 14px rgba(14,165,233,0.15);
}

.lgc-radio {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid #cbd5e1;
  position: relative;
  flex-shrink: 0;
}

.lgc-mode-card.active .lgc-radio { border-color: #0EA5E9; }

.lgc-mode-card.active .lgc-radio::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #0EA5E9;
}

.lgc-mode-label {
  font-weight: 700;
  font-size: 0.9rem;
  color: #1e293b;
  font-family: 'Poppins', sans-serif;
}

/* Field */
.lgc-field { margin-bottom: 20px; }

.lgc-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 8px !important;
  font-family: 'Poppins', sans-serif;
}

.lgc-input, .lgc-textarea {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  color: #334155;
  background: #f8fafc;
  box-sizing: border-box;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.lgc-textarea { min-height: 120px; resize: vertical; line-height: 1.7; }

.lgc-input:focus, .lgc-textarea:focus {
  outline: none;
  border-color: #0EA5E9;
  box-shadow: 0 0 0 4px rgba(14,165,233,0.1);
  background: #ffffff;
}

.lgc-input::placeholder, .lgc-textarea::placeholder {
  color: #cbd5e1;
  font-family: 'Poppins', sans-serif;
  font-size: 0.85rem;
}

.lgc-hint {
  font-size: 0.78rem;
  color: #94a3b8;
  margin-top: 8px !important;
  margin-bottom: 0 !important;
  font-style: italic;
  font-family: 'Poppins', sans-serif;
}

/* Inline field error (replaces alert) */
.lgc-field-error {
  font-size: 0.8rem;
  color: #dc2626;
  font-weight: 600;
  margin-top: 8px !important;
  margin-bottom: 0 !important;
  font-family: 'Poppins', sans-serif;
}

/* Calculate Button */
.lgc-calc-btn {
  width: 100%;
  padding: 17px;
  border-radius: 14px;
  border: none;
  background: #0EA5E9;
  color: #ffffff;
  font-family: 'Montserrat', sans-serif;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.25s;
  box-shadow: 0 6px 22px rgba(14,165,233,0.35);
  box-sizing: border-box;
  margin-top: 4px;
}

.lgc-calc-btn:hover { background: #0284C7; transform: translateY(-2px); box-shadow: 0 10px 30px rgba(14,165,233,0.4); }
.lgc-calc-btn:active { transform: translateY(0); }

/* Results */
.lgc-results { box-sizing: border-box; }

.lgc-result-hero {
  background: #334155;
  border-radius: 20px;
  padding: 34px 28px;
  text-align: center;
  margin-bottom: 20px;
  animation: lgcFade 0.5s ease forwards;
}

.lgc-hero-num {
  font-family: 'Montserrat', sans-serif;
  font-size: 2.8rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1.15;
  word-break: break-word;
}

.lgc-hero-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 10px;
  font-family: 'Poppins', sans-serif;
}

/* Detail Card */
.lgc-detail-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 8px 20px;
  margin-bottom: 16px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.04);
}

.lgc-detail-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid #f1f5f9;
}

.lgc-detail-row:last-child { border-bottom: none; }

.lgc-detail-key {
  font-size: 0.85rem;
  color: #64748b;
  font-weight: 500;
  font-family: 'Poppins', sans-serif;
}

.lgc-detail-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  font-weight: 700;
  color: #0EA5E9;
}

/* Table (Multiple Values) */
.lgc-table-wrap {
  overflow-x: auto;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  margin-bottom: 16px;
}

table.lgc-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
}

.lgc-table th {
  background: #f0f9ff;
  color: #0EA5E9;
  text-align: left;
  padding: 12px 16px;
  font-weight: 700;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.lgc-table td {
  padding: 10px 16px;
  border-top: 1px solid #f1f5f9;
  color: #334155;
}

.lgc-table tr.lgc-invalid td { color: #dc2626; font-style: italic; }

/* Reset */
.lgc-reset-btn {
  display: block;
  margin: 0 auto;
  padding: 12px 32px;
  border-radius: 10px;
  border: 2px solid #0EA5E9;
  background: transparent;
  color: #0EA5E9;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s;
}

.lgc-reset-btn:hover { background: #0EA5E9; color: #ffffff; }

/* Animations */
@keyframes lgcFade { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }

/* Responsive */
@media (max-width: 640px) {
  .lgc-mode-cards { grid-template-columns: 1fr; }
  .lgc-title      { font-size: 1.7rem !important; }
  .lgc-hero-num   { font-size: 2.1rem; }
  .lgc-card       { padding: 18px; }
}