:root {
  /* Color Palette - Premium Tech Theme */
  --bg-color: #0d1117;
  --panel-bg: rgba(22, 27, 34, 0.8);
  --accent-color: #58a6ff;
  --accent-glow: rgba(88, 166, 255, 0.4);
  --success-color: #3fb950;
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --border-color: rgba(48, 54, 61, 0.8);
  --glass-bg: rgba(255, 255, 255, 0.05);
  
  --font-main: 'Noto Sans JP', sans-serif;
  --font-tech: 'Orbitron', sans-serif;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Background Decoration */
.bg-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: radial-gradient(circle at 50% -20%, #162a4a 0%, transparent 60%),
              radial-gradient(circle at 0% 100%, #0d1117 0%, transparent 40%);
}

/* Typography */
h1, h2, h3 {
  font-family: var(--font-tech);
  letter-spacing: 2px;
}

/* Layout */
header {
  padding: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-color);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Hero Section */
.hero {
  padding: 8rem 0;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: #ffffff;
  letter-spacing: 2px;
  line-height: 1.2;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  text-align: justify;
  text-justify: inter-character;
  line-height: 1.8;
}

/* Glass Panels */
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem;
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.panel:hover {
  border-color: var(--accent-color);
}

/* Auth Section */
.auth-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 4rem;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Inputs */
input {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: 8px;
  color: #fff;
  transition: all 0.3s ease;
}

input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* Buttons */
.btn {
  padding: 1rem 2rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-weight: 700;
  font-family: var(--font-tech);
  transition: all 0.3s ease;
  text-transform: uppercase;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--accent-color);
  color: var(--accent-color);
}

/* Animations */
@keyframes glow-pulse {
  from {
    filter: drop-shadow(0 0 8px var(--accent-glow));
  }
  to {
    filter: drop-shadow(0 0 24px var(--accent-glow));
  }
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.5rem; }
  .auth-grid { grid-template-columns: 1fr; }
}

/* Sidebar Drawer Style */
.drawer {
  position: fixed;
  top: 0;
  left: -320px; /* Initially hidden */
  width: 320px;
  height: 100%;
  background: rgba(13, 17, 23, 0.98);
  backdrop-filter: blur(25px);
  border-right: 1px solid var(--border-color);
  box-shadow: 5px 0 25px rgba(0, 0, 0, 0.6);
  z-index: 1200; /* Must be higher than header and standard panels */
  transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}

.drawer.open {
  left: 0;
}

.drawer-content {
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.drawer-header h3 {
  color: var(--accent-color);
  font-size: 1.1rem;
}

.btn-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.8rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}

.btn-close:hover {
  color: #ff4d4d;
}

.drawer-items-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.drawer-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.02);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: border-color 0.2s, background-color 0.2s;
}

.drawer-item:hover {
  border-color: rgba(88, 166, 255, 0.4);
  background: rgba(255, 255, 255, 0.05);
}

.drawer-item-left {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  cursor: pointer;
  flex: 1;
}

.drawer-item-left input[type="checkbox"] {
  cursor: pointer;
  accent-color: var(--accent-color);
  width: 16px;
  height: 16px;
}

.drawer-item-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.drawer-item-gear {
  font-size: 1rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: color 0.2s, transform 0.2s;
  padding: 0.2rem 0.5rem;
}

.drawer-item-gear:hover {
  color: var(--accent-color);
  transform: rotate(45deg);
}

/* Background overlay when drawer is open */
.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1199;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.drawer-overlay.show {
  display: block;
  opacity: 1;
}

/* Drawer Action Buttons Style */
.drawer-action-btn {
  background: rgba(255, 255, 255, 0.02) !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--border-color) !important;
  text-transform: none !important;
  font-family: var(--font-main) !important;
  font-size: 0.85rem !important;
  padding: 0.8rem 1.2rem !important;
  text-align: left !important;
  width: 100% !important;
  display: flex !important;
  align-items: center !important;
  gap: 0.8rem !important;
  transition: all 0.2s ease !important;
}

.drawer-action-btn:hover {
  border-color: var(--accent-color) !important;
  background: rgba(88, 166, 255, 0.08) !important;
  color: var(--accent-color) !important;
  transform: none !important;
  box-shadow: none !important;
}

/* Drag and Drop Visual Styles */
.card-stat.dragging {
  opacity: 0.35 !important;
  transform: scale(0.98) !important;
  border: 1px dashed var(--accent-color) !important;
}

.card-stat.drag-over {
  outline: 2px dashed var(--accent-color) !important;
  outline-offset: -4px !important;
  box-shadow: 0 0 15px rgba(88, 166, 255, 0.4) !important;
}

.drawer-item {
  transition: background 0.15s ease, border-color 0.15s ease !important;
}

.drawer-item:hover {
  border-color: rgba(88, 166, 255, 0.4) !important;
  background: rgba(255, 255, 255, 0.06) !important;
}

.chart-container.dragging {
  opacity: 0.35 !important;
  transform: scale(0.99) !important;
  border: 1px dashed #00f2ff !important;
}

.chart-container.drag-over {
  outline: 2px dashed #00f2ff !important;
  outline-offset: -4px !important;
  box-shadow: 0 0 15px rgba(0, 242, 255, 0.4) !important;
}