/* ==========================================================================
   SIH 2026 PIXEL PEAK SOFT CHARCOAL & LIGHT CHAMPAGNE GOLD DESIGN SYSTEM
   Soft Charcoal • Light Champagne Gold • Extremely Comfortable • Responsive
   ========================================================================== */

:root {
  /* Soft Dark Charcoal & Charcoal Slate Palette */
  --bg-dark: #12151E;
  --bg-sidebar: rgba(20, 25, 36, 0.92);
  --bg-card: rgba(28, 35, 50, 0.65);
  --bg-card-hover: rgba(38, 48, 68, 0.75);
  --border-color: rgba(229, 192, 123, 0.12);
  --border-glow: rgba(229, 192, 123, 0.3);
  
  --text-heading: #FAFAFA;
  --text-main: #D1D5DB;
  --text-muted: #9CA3AF;
  --text-dim: #6B7280;
  
  /* Very Light Champagne Gold Palette */
  --accent-gold: #E5C07B;
  --accent-gold-light: #F3E5AB;
  --accent-gold-bg: rgba(229, 192, 123, 0.1);
  --accent-gold-border: rgba(229, 192, 123, 0.28);
  
  --accent-green: #6EE7B7;
  --accent-green-bg: rgba(110, 231, 183, 0.1);
  --accent-red: #FCA5A5;
  --accent-red-bg: rgba(252, 165, 165, 0.1);
  --accent-blue: #93C5FD;
  --accent-blue-bg: rgba(147, 197, 253, 0.1);

  --sidebar-width: 330px;
  --header-height: 66px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'Fira Code', monospace;
}

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

/* Soothing Scrollbar */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: rgba(229, 192, 123, 0.2);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-gold);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.8;
  overflow-x: hidden;
  /* Soft Charcoal & Light Gold Radial Ambient Backdrop */
  background-image: 
    radial-gradient(at 50% 0%, rgba(229, 192, 123, 0.07) 0px, transparent 60%),
    radial-gradient(at 100% 100%, rgba(20, 25, 36, 0.4) 0px, transparent 70%);
  background-attachment: fixed;
}

/* App Layout */
#app {
  display: flex;
  min-height: 100vh;
}

/* Sidebar Glassmorphism */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  box-shadow: 8px 0 25px rgba(0, 0, 0, 0.25);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar.collapsed {
  transform: translateX(-100%);
}

.sidebar-header {
  padding: 1.3rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-icon {
  position: relative;
  width: 38px;
  height: 38px;
  background: var(--accent-gold-bg);
  border: 1px solid var(--accent-gold-border);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-gold);
  font-size: 1.15rem;
}

.pulse-dot {
  position: absolute;
  top: -2px;
  right: -2px;
  width: 8px;
  height: 8px;
  background-color: var(--accent-gold);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-gold);
  animation: pulse 2.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.brand-title {
  display: block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  color: #FFF;
}

.brand-subtitle {
  display: block;
  font-size: 0.65rem;
  font-family: var(--font-mono);
  color: var(--accent-gold);
  letter-spacing: 1.2px;
}

/* Sidebar Search Box */
.search-box {
  padding: 1rem 1.25rem 0.5rem 1.25rem;
  position: relative;
}

.search-box input {
  width: 100%;
  background: rgba(18, 21, 30, 0.7);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.65rem 0.75rem 0.65rem 2.4rem;
  color: var(--text-main);
  font-size: 0.825rem;
  font-family: var(--font-sans);
  outline: none;
  transition: all 0.25s ease;
}

.search-box input:focus {
  border-color: var(--accent-gold);
  background: rgba(18, 21, 30, 0.95);
  box-shadow: 0 0 0 3px rgba(229, 192, 123, 0.15);
}

.search-icon {
  position: absolute;
  left: 1.85rem;
  top: 48%;
  transform: translateY(-50%);
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* Navigation Tree */
.nav-tree {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 1rem 1.5rem 1rem;
}

.nav-group-title {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin: 1.4rem 0.5rem 0.4rem 0.5rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.58rem 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 8px;
  margin-bottom: 3px;
  transition: all 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.04);
  color: #FFF;
}

.nav-item.active {
  background: var(--accent-gold-bg);
  color: var(--accent-gold);
  border: 1px solid var(--accent-gold-border);
  font-weight: 600;
}

.nav-item i {
  font-size: 0.85rem;
  width: 18px;
  text-align: center;
  color: var(--text-dim);
}

.nav-item:hover i, .nav-item.active i {
  color: var(--accent-gold);
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 1.1rem 1.25rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-dim);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-gold);
}

/* Main Content Wrapper */
.main-wrapper {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: margin-left 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.main-wrapper.full-width {
  margin-left: 0;
}

/* Top Header */
.top-header {
  height: var(--header-height);
  background: rgba(18, 21, 30, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.icon-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.95rem;
  cursor: pointer;
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
  transition: all 0.2s;
}

.icon-btn:hover {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
  background: var(--accent-gold-bg);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.breadcrumb .bc-item {
  color: var(--accent-gold);
  font-weight: 500;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.doc-progress-container {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.progress-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.progress-bar-bg {
  width: 110px;
  height: 5px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-gold);
  box-shadow: 0 0 8px var(--accent-gold);
  transition: width 0.3s ease;
}

.search-trigger-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.45rem 0.9rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  transition: all 0.2s;
}

.search-trigger-btn:hover {
  border-color: var(--accent-gold);
  color: #FFF;
}

.search-kbd {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 7px;
  border-radius: 4px;
  color: var(--text-dim);
}

/* Reader Content Area */
.content-area {
  flex: 1;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 3rem 2.5rem 5rem 2.5rem;
}

.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  min-height: 350px;
  color: var(--accent-gold);
  font-family: var(--font-mono);
}

.loading-spinner i {
  font-size: 2rem;
}

/* Markdown Reading Typography & Styling */
.markdown-body {
  color: var(--text-main);
  font-size: 1rem;
  line-height: 1.8;
}

.markdown-body h1 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #FFF;
  margin-bottom: 1.75rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.markdown-body h2 {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 700;
  color: #F8FAFC;
  margin-top: 2.5rem;
  margin-bottom: 1.1rem;
}

.markdown-body h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: #E2E8F0;
  margin-top: 2rem;
  margin-bottom: 0.85rem;
}

.markdown-body p {
  margin-bottom: 1.35rem;
  color: #D1D5DB;
}

.markdown-body strong {
  color: #FFF;
  font-weight: 600;
}

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2.25rem 0;
}

.markdown-body ul, .markdown-body ol {
  margin-bottom: 1.35rem;
  padding-left: 1.6rem;
  color: #D1D5DB;
}

.markdown-body li {
  margin-bottom: 0.45rem;
}

.markdown-body blockquote {
  border-left: 3px solid var(--accent-gold);
  background: var(--accent-gold-bg);
  padding: 1.1rem 1.35rem;
  border-radius: 0 8px 8px 0;
  margin-bottom: 1.5rem;
  font-style: italic;
  color: #E2E8F0;
}

/* Links in Markdown Content */
.markdown-body a {
  color: var(--accent-gold);
  text-decoration: none;
  border-bottom: 1px rgba(229, 192, 123, 0.4) dashed;
  transition: all 0.2s ease;
}

.markdown-body a:hover {
  color: #FFF;
  border-bottom-style: solid;
  border-bottom-color: var(--accent-gold);
}

/* Code Blocks & ASCII Diagrams */
.markdown-body pre {
  background: #0B0E14 !important;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  margin-bottom: 1.75rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.markdown-body code {
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent-gold);
  padding: 0.2rem 0.45rem;
  border-radius: 5px;
  font-size: 0.875em;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.markdown-body pre code {
  background: transparent;
  padding: 0;
  color: #E2E8F0;
  border: none;
}

/* Tables */
.markdown-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-bottom: 1.75rem;
  font-size: 0.875rem;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.markdown-body th {
  background: var(--bg-card);
  color: #FFF;
  font-family: var(--font-heading);
  font-weight: 700;
  text-align: left;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--border-color);
}

.markdown-body td {
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--border-color);
  color: #D1D5DB;
  background-color: rgba(18, 21, 30, 0.4);
}

.markdown-body tr:last-child td {
  border-bottom: none;
}

.markdown-body tr:hover td {
  background-color: var(--bg-card-hover);
}

/* Status Badges - Cohesive Soothing Palette */
.meta-status {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.75rem;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.725rem;
  font-weight: 600;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.badge--fact {
  background: var(--accent-green-bg);
  color: var(--accent-green);
  border-color: rgba(110, 231, 183, 0.25);
}

.badge--hypothesis {
  background: var(--accent-gold-bg);
  color: var(--accent-gold);
  border-color: var(--accent-gold-border);
}

.badge--question {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  border-color: var(--border-color);
}

.badge--evidence {
  background: var(--accent-blue-bg);
  color: var(--accent-blue);
  border-color: rgba(147, 197, 253, 0.25);
}

.badge--attack {
  background: var(--accent-red-bg);
  color: var(--accent-red);
  border-color: rgba(252, 165, 165, 0.25);
}

.badge--decision {
  background: var(--accent-gold-bg);
  color: var(--accent-gold);
  border-color: var(--accent-gold-border);
}

/* Callout Boxes (Custom :::tip, :::warning, :::danger, :::note) */
.callout {
  padding: 1.35rem 1.5rem;
  border-radius: 10px;
  margin-bottom: 1.75rem;
  border-left: 3px solid;
  font-size: 0.95rem;
  background: var(--bg-card);
}

.callout-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.callout--tip {
  border-color: var(--accent-gold);
  color: #E2E8F0;
}
.callout--tip .callout-title { color: var(--accent-gold); }

.callout--warning {
  border-color: var(--accent-gold);
  color: #E2E8F0;
}
.callout--warning .callout-title { color: var(--accent-gold); }

.callout--danger {
  border-color: var(--accent-red);
  color: #E2E8F0;
}
.callout--danger .callout-title { color: var(--accent-red); }

.callout--note {
  border-color: var(--text-dim);
  color: #D1D5DB;
}
.callout--note .callout-title { color: #FFF; }

/* Large START THE RESEARCH Button & Links */
.markdown-body a.start-research-btn, .start-research-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  background: var(--accent-gold);
  color: #12151E !important;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
  padding: 1rem 2.25rem;
  border-radius: 10px;
  text-decoration: none !important;
  border: none !important;
  box-shadow: 0 0 20px rgba(229, 192, 123, 0.25);
  transition: all 0.25s ease;
  cursor: pointer;
}

.start-research-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(229, 192, 123, 0.5);
  background: var(--accent-gold-light);
}

/* Footer Navigation Controls (Previous / Next Buttons) */
.doc-footer-nav {
  margin-top: 4.5rem;
  padding-top: 2.25rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.nav-button {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.1rem 1.4rem;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  transition: all 0.2s ease;
  max-width: 48%;
  flex: 1;
  text-align: left;
}

.nav-button:hover:not(:disabled) {
  border-color: var(--accent-gold);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.nav-button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.next-button {
  justify-content: flex-end;
  text-align: right;
}

.nav-btn-text {
  display: flex;
  flex-direction: column;
}

.nav-btn-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent-gold);
  letter-spacing: 1px;
}

.nav-btn-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: #FFF;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Modal Search */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(18, 21, 30, 0.85);
  backdrop-filter: blur(12px);
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-dialog {
  width: 90%;
  max-width: 660px;
  background: var(--bg-sidebar);
  border: 1px solid var(--accent-gold-border);
  box-shadow: 0 0 40px rgba(229, 192, 123, 0.15);
  border-radius: 14px;
  overflow: hidden;
}

.modal-header {
  padding: 1.1rem 1.4rem;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--accent-gold);
}

.modal-header input {
  flex: 1;
  background: transparent;
  border: none;
  color: #FFF;
  font-size: 1.05rem;
  outline: none;
  font-family: var(--font-sans);
}

.search-results-list {
  max-height: 420px;
  overflow-y: auto;
  padding: 0.85rem;
}

.search-result-item {
  padding: 0.85rem 1.1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
  margin-bottom: 5px;
}

.search-result-item:hover {
  background: var(--bg-card);
}

.search-result-title {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--accent-gold);
  font-size: 0.95rem;
}

.search-result-path {
  font-family: var(--font-mono);
  font-size: 0.725rem;
  color: var(--text-dim);
}

/* Mobile Responsiveness */
@media (max-width: 992px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 95;
    display: none;
  }
  .sidebar-overlay.active {
    display: block;
  }
  .main-wrapper {
    margin-left: 0;
  }
}