@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');

/* ============================================
   Octal Calculator - by Yaseen
   ============================================ */

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

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

.occ-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;
}

.occ-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;
}

.occ-subtitle {
  color: #64748b;
  font-size: 0.88rem;
  margin: 0 auto !important;
  font-family: 'Poppins', sans-serif;
  max-width: 580px;
  line-height: 1.6;
}

/* Card */
.occ-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 */
.occ-quick-section {
  border: 1.5px dashed #cbd5e1;
  border-radius: 14px;
  padding: 16px 20px;
  margin-bottom: 28px;
  background: #fafcff;
}

.occ-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;
}

.occ-quick-btns { display: flex; flex-wrap: wrap; gap: 10px; }

.occ-quick-btn {
  padding: 9px 22px;
  border-radius: 8px;
  border: 1.5px solid #0EA5E9;
  background: #0EA5E9;
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: 'JetBrains Mono', monospace;
}

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

/* Field */
.occ-field { margin-bottom: 20px; display: flex; flex-direction: column; gap: 10px; }

.occ-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 4px !important;
  font-family: 'Poppins', sans-serif;
}

.occ-input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  color: #334155;
  background: #f8fafc;
  box-sizing: border-box;
  transition: border-color 0.2s, box-shadow 0.2s;
  letter-spacing: 1px;
}

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

.occ-input::placeholder { color: #cbd5e1; font-family: 'Poppins', sans-serif; font-size: 0.85rem; letter-spacing: 0; }

.occ-operator-wrap { width: 100%; }

.occ-select {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-family: 'Poppins', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: #334155;
  background: #f8fafc;
  box-sizing: border-box;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
  appearance: auto;
}

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

.occ-field-error {
  font-size: 0.8rem;
  color: #dc2626;
  font-weight: 600;
  margin: 0 !important;
  font-family: 'Poppins', sans-serif;
}

/* Calculate Button */
.occ-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;
}

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

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

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

.occ-hero-expr {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  color: #94a3b8;
  margin-bottom: 8px;
  letter-spacing: 2px;
}

.occ-hero-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 3rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.1;
  word-break: break-all;
  letter-spacing: 4px;
}

.occ-hero-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: #64748b;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-top: 10px;
  font-family: 'Poppins', sans-serif;
}

/* Detail Card */
.occ-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);
}

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

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

.occ-detail-key {
  font-size: 0.85rem;
  color: #64748b;
  font-weight: 500;
  font-family: 'Poppins', sans-serif;
  flex-shrink: 0;
}

.occ-detail-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.92rem;
  font-weight: 700;
  color: #0EA5E9;
  text-align: right;
  word-break: break-all;
}

/* Steps */
.occ-steps-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 24px 0 16px;
}

.occ-steps-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, #e2e8f0);
}
.occ-steps-line:last-child { background: linear-gradient(90deg, #e2e8f0, transparent); }

.occ-steps-title {
  font-family: 'Montserrat', sans-serif !important;
  font-size: 0.78rem !important;
  font-weight: 800 !important;
  color: #0EA5E9 !important;
  margin: 0 !important;
  padding: 0 !important;
  white-space: nowrap;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.occ-step-row {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid #f1f5f9;
  animation: occSlide 0.3s ease forwards;
  opacity: 0;
  transform: translateX(-6px);
}

.occ-step-row:last-child { border-bottom: none; }

.occ-step-num {
  min-width: 30px;
  height: 30px;
  background: #0EA5E9;
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.78rem;
  font-weight: 800;
  flex-shrink: 0;
}

.occ-step-desc {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: #334155;
  padding-top: 4px;
  line-height: 1.7;
  white-space: pre-wrap;
}

/* Reset */
.occ-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;
}

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

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

/* Responsive */
@media (max-width: 640px) {
  .occ-title    { font-size: 1.7rem !important; }
  .occ-hero-num { font-size: 2rem; letter-spacing: 2px; }
  .occ-card     { padding: 18px; }
}