@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;600&display=swap');

/* ============================================
   Convolution Calculator - by Yaseen
   ============================================ */

.conv-wrapper {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 20px;
  font-family: 'Poppins', sans-serif;
  background: #ffffff;
  box-sizing: border-box;
}

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

.conv-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;
}

.conv-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;
}

.conv-subtitle {
  color: #64748b;
  font-size: 0.88rem;
  margin: 0 auto !important;
  font-family: 'Poppins', sans-serif;
  max-width: 600px;
  line-height: 1.6;
}

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

.conv-quick-main-label {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.82rem;
  font-weight: 800;
  color: #0EA5E9;
  margin: 0 0 16px 0 !important;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.conv-quick-group {
  margin-bottom: 14px;
}

.conv-quick-group:last-child { margin-bottom: 0; }

.conv-quick-group-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  color: #64748b;
  font-family: 'Poppins', sans-serif;
  margin-bottom: 8px;
  letter-spacing: 0.3px;
}

.conv-quick-btns { display: flex; flex-wrap: wrap; gap: 8px; }

.conv-quick-btn {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1.5px solid #0EA5E9;
  background: transparent;
  color: #0EA5E9;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: 'Poppins', sans-serif;
}

.conv-quick-btn:hover { background: #0EA5E9; color: #ffffff; }

.conv-quick-btn--alt {
  border-color: #334155;
  color: #334155;
}
.conv-quick-btn--alt:hover { background: #334155; color: #ffffff; }

.conv-quick-btn--cont {
  border-color: #64748b;
  color: #64748b;
}
.conv-quick-btn--cont:hover { background: #64748b; color: #ffffff; }

/* Fields */
.conv-field { margin-bottom: 20px; }

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

.conv-select {
  width: 100%;
  padding: 13px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-family: 'Poppins', sans-serif;
  font-size: 0.92rem;
  font-weight: 500;
  color: #334155;
  background: #f8fafc;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  box-sizing: border-box;
}

.conv-select:focus { border-color: #0EA5E9; box-shadow: 0 0 0 4px rgba(14,165,233,0.1); }

.conv-inputs-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.conv-input {
  width: 100%;
  padding: 13px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  font-weight: 600;
  color: #334155;
  background: #f8fafc;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}

.conv-input:focus {
  border-color: #0EA5E9;
  box-shadow: 0 0 0 4px rgba(14,165,233,0.1);
  background: #fff;
}

.conv-input-hint {
  display: block;
  font-size: 0.72rem;
  color: #94a3b8;
  font-family: 'Poppins', sans-serif;
  margin-top: 6px;
}

/* Calculate Button */
.conv-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;
}

.conv-calc-btn:hover { background: #0284c7; transform: translateY(-2px); box-shadow: 0 10px 30px rgba(14,165,233,0.4); }
.conv-calc-btn:active { transform: translateY(0); }

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

.conv-result-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}

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

.conv-results-title {
  font-family: 'Montserrat', sans-serif !important;
  font-size: 0.9rem !important;
  font-weight: 800 !important;
  color: #0EA5E9 !important;
  margin: 0 !important;
  padding: 0 !important;
  white-space: nowrap;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* Signal Grid */
.conv-signal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.conv-signal-box {
  background: #334155;
  border-radius: 16px;
  padding: 20px 16px;
  text-align: center;
  animation: convPop 0.4s cubic-bezier(0.34,1.56,0.64,1) forwards;
  opacity: 0;
  transform: scale(0.85);
}

.conv-signal-label {
  font-size: 0.62rem;
  font-weight: 700;
  color: #94a3b8;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-family: 'Poppins', sans-serif;
  margin-bottom: 10px;
}

.conv-signal-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.5;
  word-break: break-all;
}

.conv-signal-box.output .conv-signal-value { color: #38bdf8; }

/* Process Card */
.conv-process-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 22px;
  margin-bottom: 24px;
  text-align: center;
}

.conv-process-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-family: 'Poppins', sans-serif;
  margin-bottom: 18px;
}

.conv-process-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.conv-process-node {
  border-radius: 12px;
  padding: 14px 24px;
  min-width: 80px;
  text-align: center;
}

.conv-node-blue { background: #0EA5E9; box-shadow: 0 4px 14px rgba(14,165,233,0.3); }
.conv-node-dark { background: #334155; box-shadow: 0 4px 14px rgba(51,65,85,0.2); }

.conv-node-text {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
}

.conv-node-sub {
  display: block;
  font-size: 0.65rem;
  color: rgba(255,255,255,0.7);
  font-family: 'Poppins', sans-serif;
  margin-top: 3px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.conv-process-arrow {
  font-size: 1.3rem;
  color: #0EA5E9;
  font-weight: 700;
}

/* Section Title */
.conv-section-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.78rem;
  font-weight: 800;
  color: #0EA5E9;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

/* Steps */
.conv-steps { display: flex; flex-direction: column; gap: 14px; margin-bottom: 24px; }

.conv-step {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  overflow: hidden;
  animation: convSlide 0.4s ease forwards;
  opacity: 0;
  transform: translateY(10px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}

.conv-step-header {
  background: #334155;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.conv-step-num {
  width: 28px;
  height: 28px;
  background: #0EA5E9;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.75rem;
  font-weight: 800;
  color: #ffffff;
  flex-shrink: 0;
}

.conv-step-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 0.85rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.3px;
}

.conv-step-body {
  padding: 20px;
}

.conv-step-desc {
  font-size: 0.84rem;
  color: #64748b;
  font-family: 'Poppins', sans-serif;
  line-height: 1.7;
  margin-bottom: 12px;
}

.conv-step-desc:last-child { margin-bottom: 0; }

.conv-formula-box {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 14px 18px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88rem;
  color: #334155;
  font-weight: 600;
  margin: 12px 0;
  line-height: 1.8;
  overflow-x: auto;
}

/* Calculation Table */
.conv-table-wrap { overflow-x: auto; margin: 12px 0; }

.conv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  font-family: 'JetBrains Mono', monospace;
  min-width: 400px;
}

.conv-table th {
  background: #0EA5E9;
  color: #ffffff;
  padding: 10px 14px;
  font-family: 'Poppins', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-align: left;
}

.conv-table td {
  padding: 10px 14px;
  border-bottom: 1px solid #f1f5f9;
  color: #334155;
  vertical-align: top;
}

.conv-table tr:last-child td { border-bottom: none; }
.conv-table tr:nth-child(even) td { background: #f8fafc; }

.conv-table td:last-child {
  font-weight: 700;
  color: #0EA5E9;
}

/* Final Result */
.conv-final-box {
  background: #334155;
  border-radius: 12px;
  padding: 16px 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  font-weight: 700;
  color: #38bdf8;
  margin-top: 12px;
  line-height: 1.6;
}

/* Reset */
.conv-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;
}

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

/* Animations */
@keyframes convPop   { to { opacity:1; transform:scale(1); } }
@keyframes convSlide { to { opacity:1; transform:translateY(0); } }

/* Responsive */
@media (max-width: 600px) {
  .conv-inputs-row   { grid-template-columns: 1fr; }
  .conv-signal-grid  { grid-template-columns: 1fr; }
  .conv-title        { font-size: 1.7rem !important; }
  .conv-process-flow { gap: 10px; }
  .conv-process-node { padding: 10px 16px; min-width: 60px; }
  .conv-card         { padding: 18px; }
}