@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@600;800&family=Noto+Sans+KR:wght@400;500;700;900&display=swap');

:root {
  --bg-dark: #0a0d14;
  --bg-panel: #101622;
  --bg-card: rgba(16, 22, 34, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);

  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-purple: #8b5cf6;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --radius-md: 14px;
  --radius-lg: 20px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Plus Jakarta Sans', 'Noto Sans KR', sans-serif;
}

body {
  background: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(59, 130, 246, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 90% 90%, rgba(139, 92, 246, 0.08) 0%, transparent 40%);
}

.header {
  background: rgba(10, 13, 20, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 36px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-box {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.logo-text h1 {
  font-size: 18px;
  font-weight: 800;
  background: linear-gradient(90deg, #38bdf8, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text p {
  font-size: 11px;
  color: var(--text-secondary);
}

.layout {
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
  padding: 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  flex: 1;
}

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(14px);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.panel-title {
  font-size: 17px;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
}

.trade-item-card {
  background: rgba(16, 22, 34, 0.85);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.trade-item-card:hover, .trade-item-card.active {
  border-color: #38bdf8;
  background: rgba(56, 189, 248, 0.08);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

.sim-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input, .form-select {
  background: #0b0e14;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px 14px;
  color: white;
  font-size: 13px;
  outline: none;
}

.result-card {
  background: linear-gradient(135deg, rgba(16, 22, 34, 0.9), rgba(24, 32, 48, 0.95));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Mobile Responsive */
@media (max-width: 640px) {
  .header {
    padding: 12px 16px;
  }
  .logo-text h1 {
    font-size: 16px;
  }
  .logo-text p {
    font-size: 10px;
  }
  .layout {
    padding: 12px 16px;
    gap: 16px;
  }
  .panel {
    padding: 16px;
    gap: 14px;
  }
  .sim-form-grid {
    grid-template-columns: 1fr;
  }
}