/* ==============================================================================
   PHYSICAL AI & LEROBOT HUB - HIGH-TECH DESIGN SYSTEM
   Author: AI Development Director Kodari (코다리) 🐟🚀
============================================================================== */

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

:root {
  --bg-primary: #07090e;
  --bg-secondary: #0d121d;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(28, 38, 58, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 240, 255, 0.3);
  --border-active: #00f0ff;

  --accent-cyan: #00f0ff;
  --accent-cyan-glow: rgba(0, 240, 255, 0.25);
  --accent-purple: #9d4edd;
  --accent-purple-glow: rgba(157, 78, 221, 0.25);
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  --accent-rose: #f43f5e;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --font-sans: 'Outfit', 'Noto Sans KR', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-card: 0 12px 32px -8px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  --shadow-neon: 0 0 25px rgba(0, 240, 255, 0.35);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(0, 240, 255, 0.07) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(157, 78, 221, 0.08) 0%, transparent 40%),
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
}

/* Header & Navigation */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  background: rgba(7, 9, 14, 0.85);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.85rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
}

.brand-logo {
  font-size: 2rem;
  filter: drop-shadow(0 0 12px var(--accent-cyan));
  animation: floatIcon 3s ease-in-out infinite;
}

@keyframes floatIcon {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.brand-title {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 30%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.04);
  padding: 4px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

.nav-tab {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-tab:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.06);
}

.nav-tab.active {
  background: var(--accent-cyan);
  color: #050b14;
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
}

.header-status {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-green);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulseDot 1.5s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Layout Container */
.main-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 2rem;
}

.hero-banner {
  background: linear-gradient(135deg, rgba(13, 18, 29, 0.8) 0%, rgba(26, 19, 48, 0.7) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--accent-cyan), var(--accent-purple));
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 0.75rem;
  letter-spacing: -0.03em;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 880px;
  margin-bottom: 1.5rem;
}

.tech-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.35rem 0.85rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Grid & Cards */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.75rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1.75rem;
}

.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-3px);
}

.card-header-flex {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.card-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.card-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Feature List */
.feature-list {
  list-style: none;
  margin: 1.25rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.feature-item {
  font-size: 0.9rem;
  color: var(--text-main);
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
}

.feature-check {
  color: var(--accent-cyan);
  font-size: 1rem;
  margin-top: 0.1rem;
}

/* Buttons & Inputs */
.btn {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #00b4d8 100%);
  color: #030712;
  box-shadow: 0 4px 14px rgba(0, 240, 255, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 240, 255, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
  border: 1px solid rgba(244, 63, 94, 0.4);
}

.btn-danger:hover {
  background: var(--accent-rose);
  color: #fff;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

/* 3D Canvas Box */
.canvas-wrapper {
  background: #04060a;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.robot-canvas {
  width: 100%;
  height: 100%;
  min-height: 420px;
  display: block;
}

.canvas-overlay-stats {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.joint-control-group {
  margin-top: 1.25rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.joint-slider-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
}

.slider-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.custom-range {
  width: 100%;
  appearance: none;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  outline: none;
}

.custom-range::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-cyan);
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-cyan);
}

/* ROI Financial Metric Boxes */
.roi-metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
}

.metric-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1rem;
  text-align: center;
}

.metric-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
  letter-spacing: 0.05em;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

/* Data Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
  font-size: 0.85rem;
}

.data-table th, .data-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.data-table th {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-dim);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* PWA Install Banner */
.pwa-banner {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 999;
  background: linear-gradient(135deg, #111827 0%, #1e1b4b 100%);
  border: 1px solid var(--border-glow);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7), 0 0 20px rgba(0, 240, 255, 0.3);
  max-width: 380px;
}

.pwa-banner.show {
  display: block;
  animation: slideUp 0.4s ease;
}

@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-2 { grid-template-columns: 1fr; }
  .roi-metric-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .app-header { flex-direction: column; gap: 1rem; padding: 1rem; }
  .nav-tabs { flex-wrap: wrap; justify-content: center; }
  .roi-metric-grid { grid-template-columns: 1fr; }
}