:root {
  --bg: #0a0e1a;
  --panel: #0f1528;
  --border: #1e2d4a;
  --accent: #00e5ff;
  --accent2: #00ff88;
  --accent3: #ff6b35;
  --accent4: #c77dff;
  --accent5: #ffd166;
  --accent6: #f72585;
  --text: #c8d8f0;
  --muted: #5a7090;
  --input-bg: #0d1420;
  --danger: #ff4444;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Rajdhani', sans-serif;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 80% 50% at 20% 10%, rgba(0,229,255,0.04) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(0,255,136,0.03) 0%, transparent 50%),
    repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(30,45,74,0.3) 39px, rgba(30,45,74,0.3) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(30,45,74,0.3) 39px, rgba(30,45,74,0.3) 40px);
}

/* ─── HEADER ─── */
header {
  border-bottom: 1px solid var(--border);
  padding: 1.2rem 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(15,21,40,0.9);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}
.logo-box {
  background: var(--accent);
  color: #000;
  font-family: 'Share Tech Mono', monospace;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.3rem 0.7rem;
  letter-spacing: 2px;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}
header h1 {
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: #fff;
}
header span {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted);
  margin-left: auto;
  letter-spacing: 1px;
}

/* ─── LAYOUT ─── */
.container {
  max-width: 1380px;
  margin: 0 auto;
  padding: 2rem;
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 1.5rem;
  align-items: start;
}

/* ─── VERSION SELECTOR ─── */
.version-selector {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.35rem;
  margin-bottom: 1.2rem;
}
.ver-btn {
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.5px;
  padding: 0.5rem 0.2rem;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 5px, 100% 100%, 5px 100%, 0 calc(100% - 5px));
  line-height: 1.4;
}
.ver-btn[data-v="1977"]:hover, .ver-btn[data-v="1977"].active { background: rgba(247,37,133,0.12); border-color: var(--accent6); color: var(--accent6); }
.ver-btn[data-v="1997"]:hover, .ver-btn[data-v="1997"].active { background: rgba(255,209,102,0.10); border-color: var(--accent5); color: var(--accent5); }
.ver-btn[data-v="2003"]:hover, .ver-btn[data-v="2003"].active { background: rgba(255,107,53,0.12);  border-color: var(--accent3); color: var(--accent3); }
.ver-btn[data-v="2016"]:hover, .ver-btn[data-v="2016"].active { background: rgba(199,125,255,0.10); border-color: var(--accent4); color: var(--accent4); }
.ver-btn[data-v="2018"]:hover, .ver-btn[data-v="2018"].active { background: rgba(0,229,255,0.10);   border-color: var(--accent);  color: var(--accent);  }
.ver-btn[data-v="2026"]:hover, .ver-btn[data-v="2026"].active { background: rgba(0,255,136,0.10);   border-color: var(--accent2); color: var(--accent2); }
.ver-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 2px;
  background: currentColor;
}

.version-note {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.68rem;
  color: var(--muted);
  background: rgba(0,0,0,0.2);
  border-left: 2px solid var(--border);
  padding: 0.5rem 0.7rem;
  margin-bottom: 1rem;
  line-height: 1.6;
  transition: border-color 0.3s;
}
.version-note.v1977 { border-color: var(--accent6); }
.version-note.v1997 { border-color: var(--accent5); }
.version-note.v2003 { border-color: var(--accent3); }
.version-note.v2016 { border-color: var(--accent4); }
.version-note.v2018 { border-color: var(--accent);  }
.version-note.v2026 { border-color: var(--accent2); }

/* ─── PANEL ─── */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 1.5rem;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}
.panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.section-title {
  font-size: 0.65rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  font-family: 'Share Tech Mono', monospace;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.section-title::before { content: '//'; color: var(--muted); }

.field-group { margin-bottom: 1.2rem; }

label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
label .badge {
  font-family: 'Share Tech Mono', monospace;
  background: rgba(0,229,255,0.1);
  color: var(--accent);
  border: 1px solid rgba(0,229,255,0.2);
  padding: 0 0.35rem;
  font-size: 0.7rem;
  border-radius: 2px;
}

select, input[type="number"] {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--border);
  color: #fff;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.95rem;
  padding: 0.55rem 0.8rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
  appearance: none;
  border-radius: 0;
}
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2300e5ff'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.8rem center;
  padding-right: 2rem;
  cursor: pointer;
}
select:focus, input[type="number"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(0,229,255,0.2), inset 0 0 8px rgba(0,229,255,0.04);
}
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }

.hint {
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.3rem;
  font-family: 'Share Tech Mono', monospace;
  letter-spacing: 0.5px;
}
.divider { border: none; border-top: 1px solid var(--border); margin: 1.2rem 0; }

/* ─── BOTÓN CALCULAR ─── */
.btn-calc {
  width: 100%;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: 'Rajdhani', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  padding: 0.8rem;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}
.btn-calc::before {
  content: '';
  position: absolute;
  top: 0; left: -100%; width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0,229,255,0.12), transparent);
  transition: left 0.5s;
}
.btn-calc:hover::before { left: 100%; }
.btn-calc:hover { background: rgba(0,229,255,0.08); box-shadow: 0 0 20px rgba(0,229,255,0.2); }
.btn-calc:active { transform: scale(0.98); }

/* ─── PARÁMETROS CALCULADOS ─── */
.params-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin-top: 1.2rem;
}
.param-card {
  background: var(--input-bg);
  border: 1px solid var(--border);
  padding: 0.6rem 0.8rem;
  transition: border-color 0.3s;
}
.param-card.highlight { border-color: rgba(0,229,255,0.3); }
.param-card .pk { font-size: 0.62rem; color: var(--muted); letter-spacing: 2px; text-transform: uppercase; font-family: 'Share Tech Mono', monospace; }
.param-card .pv { font-size: 1.1rem; font-weight: 700; color: #fff; font-family: 'Share Tech Mono', monospace; margin-top: 2px; }
.param-card .pv span { font-size: 0.7rem; color: var(--muted); font-weight: 400; }

/* ─── PANEL GRÁFICO ─── */
.chart-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 1.5rem;
  position: relative;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}
.chart-panel::before {
  content: '';
  position: absolute;
  top: 0; right: 0; left: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent2));
}
.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.chart-title { font-size: 1rem; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; color: #fff; }
.chart-subtitle { font-size: 0.68rem; font-family: 'Share Tech Mono', monospace; color: var(--muted); letter-spacing: 1px; }
.legend-dot {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-family: 'Share Tech Mono', monospace;
  color: var(--muted);
}
.legend-dot::before { content: ''; width: 20px; height: 2px; background: var(--accent2); display: block; }
canvas { display: block; }
.chart-wrapper { position: relative; height: 420px; }

/* ─── TABLA ─── */
.table-panel {
  grid-column: 1 / -1;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 1.5rem;
}
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-family: 'Share Tech Mono', monospace; font-size: 0.8rem; }
th {
  background: rgba(0,229,255,0.06);
  color: var(--accent);
  font-size: 0.65rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 0.6rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
td {
  padding: 0.45rem 1rem;
  color: var(--text);
  border-bottom: 1px solid rgba(30,45,74,0.5);
  transition: background 0.15s;
}
tr:hover td { background: rgba(0,229,255,0.03); }
.td-num { color: var(--accent2); }

/* ─── BOTÓN EXPORTAR ─── */
.btn-export {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 2px;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.2s;
}
.btn-export:hover { border-color: var(--accent2); color: var(--accent2); }

/* ─── ESTADO VACÍO / ERROR ─── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 0.8rem;
  color: var(--muted);
}
.empty-state .icon { font-size: 2.5rem; opacity: 0.3; filter: grayscale(1); }
.empty-state p { font-family: 'Share Tech Mono', monospace; font-size: 0.75rem; letter-spacing: 2px; text-transform: uppercase; }
.error-msg {
  color: var(--danger);
  font-size: 0.75rem;
  font-family: 'Share Tech Mono', monospace;
  margin-top: 0.5rem;
  display: none;
  letter-spacing: 1px;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 960px) {
  .container { grid-template-columns: 1fr; }
  .table-panel { grid-column: 1; }
  .version-selector { grid-template-columns: repeat(3, 1fr); }
}