/* ==========================================================================
   EduRoadmap - Modern Stylesheet (inspired by roadmap.sh)
   Theme: Glassmorphism, Flowcharts & Full Dark/Light Mode System
   ========================================================================== */

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

:root {
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-code: 'JetBrains Mono', monospace;

  /* Dark Theme Palette (Default) */
  --bg-main: #080c14;
  --bg-header: rgba(10, 15, 29, 0.92);
  --bg-card: rgba(15, 23, 42, 0.85);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --bg-node: rgba(30, 41, 59, 0.85);
  --bg-input: #0f172a;
  --bg-drawer: rgba(15, 23, 42, 0.96);
  --bg-modal: #0f172a;
  --bg-footer: rgba(15, 23, 42, 0.6);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-strong: rgba(255, 255, 255, 0.15);
  
  --text-main: #f8fafc;
  --text-heading: #ffffff;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
}

/* ==========================================================================
   LIGHT MODE OVERRIDES
   ========================================================================== */
body.light-mode {
  --bg-main: #f1f5f9;
  --bg-header: rgba(255, 255, 255, 0.94);
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-node: #ffffff;
  --bg-input: #ffffff;
  --bg-drawer: rgba(255, 255, 255, 0.98);
  --bg-modal: #ffffff;
  --bg-footer: #e2e8f0;

  --border-color: rgba(0, 0, 0, 0.09);
  --border-subtle: rgba(0, 0, 0, 0.05);
  --border-strong: rgba(0, 0, 0, 0.16);

  --text-main: #0f172a;
  --text-heading: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;
}

/* Light Mode Specific Component Styles */
body.light-mode header {
  background-color: var(--bg-header) !important;
  border-color: var(--border-color) !important;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

body.light-mode .roadmap-header-bar {
  background-color: var(--bg-header) !important;
  border-color: var(--border-color) !important;
}

body.light-mode .roadmap-card {
  background-color: #ffffff !important;
  border-color: var(--border-color) !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
}
body.light-mode .roadmap-card:hover {
  border-color: var(--primary) !important;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.12);
}

body.light-mode .skill-node-card {
  background-color: #ffffff !important;
  border-color: var(--border-color) !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}
body.light-mode .skill-node-card:hover {
  border-color: var(--primary) !important;
  box-shadow: 0 6px 16px rgba(99, 102, 241, 0.1);
}

body.light-mode .phase-milestone-pill {
  background-color: #ffffff !important;
  border-color: var(--border-color) !important;
  color: #0f172a !important;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

body.light-mode #nodeDrawer {
  background-color: #ffffff !important;
  border-color: var(--border-color) !important;
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.1);
}

body.light-mode #generatorModal > div,
body.light-mode #aiTutorModal > div {
  background-color: #ffffff !important;
  border-color: var(--border-color) !important;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.15);
}

body.light-mode footer {
  background-color: #e2e8f0 !important;
  border-color: var(--border-color) !important;
}

body.light-mode input,
body.light-mode textarea {
  background-color: #ffffff !important;
  border-color: var(--border-strong) !important;
  color: #0f172a !important;
}

body.light-mode .text-white {
  color: #0f172a !important;
}
body.light-mode .text-slate-100 {
  color: #0f172a !important;
}
body.light-mode .text-slate-200 {
  color: #1e293b !important;
}
body.light-mode .text-slate-300 {
  color: #334155 !important;
}
body.light-mode .text-slate-400 {
  color: #475569 !important;
}
body.light-mode .bg-slate-900,
body.light-mode .bg-slate-800 {
  background-color: #ffffff !important;
  border-color: var(--border-color) !important;
}

body.light-mode .category-pill:not(.bg-indigo-600) {
  background-color: #ffffff !important;
  color: #334155 !important;
  border-color: #cbd5e1 !important;
}

body.light-mode .ambient-glow {
  opacity: 0.06;
}

/* ==========================================================================
   GLOBAL STYLES & RESET
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-main) !important;
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* Background Ambient Lighting */
.ambient-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.12;
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.3s ease;
}

.glow-top-left {
  top: -150px;
  left: -100px;
  background: radial-gradient(circle, #6366f1, #06b6d4);
}

.glow-bottom-right {
  bottom: -150px;
  right: 0%;
  background: radial-gradient(circle, #8b5cf6, #ec4899);
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.2);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(148, 163, 184, 0.4);
}

.no-scrollbar::-webkit-scrollbar {
  display: none;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

/* Roadmap Card Animation */
.roadmap-card {
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.2s ease;
}
.roadmap-card:hover {
  transform: translateY(-3px);
}

/* Graphical Flowchart Tree & Connectors */
.roadmap-flowchart-tree {
  position: relative;
}

.phase-milestone-pill {
  position: relative;
  z-index: 10;
  backdrop-filter: blur(12px);
}

.skill-node-card {
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.2s ease;
}
.skill-node-card:hover {
  transform: translateY(-2px);
}

/* Slide-out Drawer */
#nodeDrawer {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Message Animation */
@keyframes slideUpFade {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-message {
  animation: slideUpFade 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Category Pills */
.category-pill {
  user-select: none;
}