/* ═══ CSS RESET & BASE VARIABLES ═══ */
:root {
  --bg-main: #0a0c10;
  --bg-panel: #13161f;
  --bg-input: #1e2230;
  --border-color: #252a38;
  --text-main: #8c97b2;
  --text-light: #d1d7e8;
  --accent-cyan: #00d4ff;
  --accent-green: #7fff6b;
  --accent-red: #ff4a4a;
  
  --font-sans: 'Barlow', sans-serif;
  --font-condensed: 'Barlow Condensed', sans-serif;
  --font-mono: 'Share Tech Mono', monospace;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ═══ HEADER ═══ */
header {
  display: flex;
  align-items: center;
  padding: 16px 24px;
  background: #08090c;
  border-bottom: 1px solid var(--border-color);
}

.logo-mark {
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  margin-right: 12px;
}

.logo-text {
  font-family: var(--font-condensed);
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
}

.logo-text span {
  color: var(--accent-cyan);
}

.header-tag {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-main);
  letter-spacing: 2px;
  padding: 4px 12px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

/* ═══ LAYOUT GRID ═══ */
.main-grid {
  display: grid;
  grid-template-columns: 400px 1fr;
  flex: 1;
  overflow: hidden; /* Evita scroll en desktop si es posible */
}

.panel-left {
  background: var(--bg-panel);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: 24px;
}

.panel-right {
  display: flex;
  flex-direction: column;
  padding: 24px;
  overflow-y: auto;
}

/* ═══ TYPOGRAPHY & SECTIONS ═══ */
.section-header {
  font-family: var(--font-condensed);
  font-size: 14px;
  letter-spacing: 2px;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
}

.section-header.green {
  color: var(--accent-green);
  margin-top: 24px;
}

.section-header::after {
  content: '';
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: 0.5;
  margin-left: 12px;
}

/* ═══ CONTROLS & INPUTS ═══ */
.control-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.control-row label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
}

input[type="number"] {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-light);
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 4px;
  outline: none;
  width: 100%;
  transition: border-color 0.2s;
}

input[type="number"]:focus {
  border-color: var(--accent-cyan);
}

/* ═══ BUTTONS ═══ */
.btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1.5px;
  padding: 10px 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent-cyan);
  color: #000;
  font-weight: 700;
}

.btn-primary:hover {
  background: #33e0ff;
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-light);
}

.btn-secondary:hover {
  border-color: var(--text-light);
  background: rgba(255, 255, 255, 0.05);
}

.btn-row {
  display: flex;
  gap: 12px;
  margin: 24px 0;
}

.btn-row .btn {
  flex: 1;
}

/* ═══ PRESETS TABS ═══ */
.presets-section {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 16px;
}

.preset-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.preset-tab {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
  flex: 1;
  text-align: center;
}

.preset-tab:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.preset-tab.active {
  background: rgba(127, 255, 107, 0.1);
  border-color: var(--accent-green);
  color: var(--accent-green);
}

#presetParamArea {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ═══ VERTICES TABLE ═══ */
.vertices-area {
  flex: 1;
  overflow-y: auto;
}

.vertices-table {
  width: 100%;
  border-collapse: collapse;
}

.vertices-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-main);
  padding: 8px;
  border-bottom: 1px solid var(--border-color);
}

.vertices-table td {
  padding: 4px;
}

.vertices-table td:first-child {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-main);
  text-align: center;
  width: 30px;
}

.vertices-table input {
  padding: 6px;
  font-size: 13px;
}

.delete-btn {
  background: none;
  border: none;
  color: var(--accent-red);
  cursor: pointer;
  font-size: 16px;
  opacity: 0.5;
  transition: opacity 0.2s;
}

.delete-btn:hover {
  opacity: 1;
}

/* ═══ CANVAS & VISUALIZATION ═══ */
.canvas-wrapper {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  position: relative;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 24px;
}

.canvas-label {
  position: absolute;
  top: 12px;
  left: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-main);
  background: rgba(10, 12, 16, 0.8);
  padding: 4px 8px;
  border-radius: 4px;
  pointer-events: none;
}

canvas {
  max-width: 100%;
  max-height: 100%;
}

/* ═══ RESULTS AREA ═══ */
.results-area {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 24px;
  flex: 1;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--border-color);
  font-family: var(--font-condensed);
  letter-spacing: 2px;
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.result-card {
  background: var(--bg-input);
  padding: 16px;
  border-radius: 4px;
  border-left: 2px solid var(--accent-cyan);
}

.result-label {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-main);
  margin-bottom: 4px;
}

.result-value {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--text-light);
}

.result-unit {
  font-size: 12px;
  color: var(--text-main);
  margin-left: 4px;
}

/* ═══ ERROR MESSAGES ═══ */
.error-msg {
  color: var(--accent-red);
  font-family: var(--font-mono);
  font-size: 12px;
  margin-bottom: 12px;
  min-height: 18px;
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 900px) {
  .main-grid {
    grid-template-columns: 1fr;
    overflow-y: auto;
  }
  
  .panel-left {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  
  .header-tag {
    display: none;
  }
}