:root {
  --bg: #07090f;
  --panel: #10141c;
  --panel-2: #161b26;
  --text: #eef2f8;
  --muted: #8b95a8;
  --muted-2: #5f6b80;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --accent: #6ea8ff;
  --accent-2: #8b7dff;
  --accent-soft: rgba(110, 168, 255, 0.12);
  --success: #5fd38d;
  --success-soft: rgba(95, 211, 141, 0.1);
  --warn: #ffc46b;
  --warn-soft: rgba(255, 196, 107, 0.1);
  --error: #ff8b8b;
  --error-soft: rgba(255, 139, 139, 0.1);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  --font: "Plus Jakarta Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(circle at 12% 8%, rgba(110, 168, 255, 0.1), transparent 30%),
    radial-gradient(circle at 88% 92%, rgba(139, 125, 255, 0.08), transparent 28%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 9, 15, 0.7);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 30;
}

.app-bar-left {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  min-width: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
}

.back-link:hover { color: var(--text); border-color: var(--border-strong); }

.app-title {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.app-subtitle {
  margin: 0.1rem 0 0;
  color: var(--muted-2);
  font-size: 0.8rem;
}

.app-bar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.wrap {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 3rem;
}

.card-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 1.1rem;
}

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.62rem 0.95rem;
  border-radius: 10px;
  border: 1px solid rgba(110, 168, 255, 0.35);
  background: linear-gradient(180deg, rgba(110, 168, 255, 0.22), rgba(110, 168, 255, 0.1));
  color: #eef4ff;
  font-family: var(--font);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.2s, background 0.2s;
}

.btn:hover { transform: translateY(-1px); border-color: rgba(110, 168, 255, 0.55); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

.btn-ghost {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover { border-color: var(--border-strong); }

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
}

.field input,
.field select {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.92rem;
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: rgba(110, 168, 255, 0.5);
  box-shadow: 0 0 0 3px rgba(110, 168, 255, 0.12);
}

.field .unit {
  font-size: 0.72rem;
  color: var(--muted-2);
}

.pill-group {
  display: inline-flex;
  padding: 0.25rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  gap: 0.2rem;
}

.pill {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  font-family: var(--font);
  font-size: 0.83rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.pill:hover { color: var(--text); }

.pill.active {
  background: var(--accent-soft);
  color: #d9e8ff;
  box-shadow: inset 0 0 0 1px rgba(110, 168, 255, 0.3);
}

.stat-row {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.stat-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.82rem;
  color: var(--muted);
}

.stat-chip b {
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.86rem;
}

.result-box {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.8rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel-2);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--muted);
}

.result-box.ok { border-color: rgba(95, 211, 141, 0.28); background: var(--success-soft); color: #d8f5e4; }
.result-box.warn { border-color: rgba(255, 196, 107, 0.28); background: var(--warn-soft); color: #ffe9c4; }
.result-box.error { border-color: rgba(255, 139, 139, 0.28); background: var(--error-soft); color: #ffd5d5; }

.mono { font-family: var(--mono); }
.muted { color: var(--muted); }

.overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(7, 9, 15, 0.72);
  backdrop-filter: blur(6px);
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}

.overlay.visible { opacity: 1; pointer-events: auto; }

.overlay-card {
  width: min(420px, calc(100% - 2rem));
  padding: 1.6rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-strong);
  background: var(--panel);
  box-shadow: var(--shadow);
  text-align: center;
}

.overlay-card h2 { margin: 0 0 0.5rem; letter-spacing: -0.02em; }
.overlay-card p { margin: 0 0 1.2rem; color: var(--muted); }