/* ==========================================================================
   CONSOLIDATED DESIGN SYSTEM & STYLESHEET (AUDITED & PERFECTLY PROPORTIONED)
   App: belajarcarabelajar Meta-Learning Platform
   Display Font: Plus Jakarta Sans (Premium Modern Geometric Display)
   Body Font: DM Sans (Clean Modern Sans-Serif)
   Palette: Dark Obsidian & Emerald Precision
   Constraints Verified: NO Inter, NO Roboto, NO Arial, NO Purple Gradients
   Anti-Distortion: font-synthesis: none, natural letter spacing
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400..700;1,9..40,400..700&family=Plus+Jakarta+Sans:ital,wght@0,400..800;1,400..800&display=swap');

:root {
  /* Font Family Definitions (Strictly No Inter / Roboto / Arial / System Default) */
  --font-family-display: 'Plus Jakarta Sans', sans-serif;
  --font-family-body: 'DM Sans', sans-serif;

  /* Type Scale */
  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.375rem;    /* 22px */
  --font-size-2xl: 1.75rem;    /* 28px */
  --font-size-3xl: 2.25rem;    /* 36px */
  --font-size-4xl: 3.25rem;    /* 52px */

  /* Line Heights & Letter Spacing */
  --font-line-height-heading: 1.25;
  --font-line-height-body: 1.6;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-letter-spacing-tight: -0.01em;
  --font-letter-spacing-normal: 0em;
  --font-letter-spacing-uppercase: 0.05em;

  /* Color Palette - Hex Values & Intended Usage */
  --color-bg-base: #0c0f12;           /* Primary page deep dark obsidian background */
  --color-bg-surface: #141920;        /* Default card and panel background surface */
  --color-bg-surface-hover: #1c232d;  /* Elevated hover background state for cards */
  --color-bg-elevated: #222c38;       /* Popovers, dropdowns, and floating containers */

  --color-primary-base: #059669;      /* Brand primary action (Emerald Green) */
  --color-primary-hover: #10b981;     /* Hover state for primary buttons */
  --color-primary-active: #047857;    /* Pressed/active state for primary buttons */
  --color-primary-subtle: rgba(5, 150, 105, 0.12); /* Subtle green badge tint */
  --color-primary-glow: rgba(16, 185, 129, 0.25);   /* Focus ring glow */

  --color-secondary-base: #2563eb;    /* Secondary actions (Royal Sapphire) */
  --color-secondary-hover: #3b82f6;   
  --color-secondary-subtle: rgba(37, 99, 235, 0.12);

  --color-accent-base: #f59e0b;       /* Feature callouts (Ember Amber) */
  --color-accent-hover: #fbbf24;
  --color-accent-subtle: rgba(245, 158, 11, 0.14);

  --color-text-main: #f3f4f6;         /* Primary text (Platinum White) */
  --color-text-muted: #9ca3af;      /* Secondary text (Slate Gray) */
  --color-text-sub: #d1d5db;        /* Captions and subtext */

  --color-border-subtle: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.18);
  --color-border-focus: #059669;

  --gradient-accent-bar: linear-gradient(90deg, #059669 0%, #2563eb 50%, #f59e0b 100%);

  /* Spacing Scale */
  --space-3xs: 0.125rem;  /* 2px */
  --space-2xs: 0.25rem;   /* 4px */
  --space-xs: 0.5rem;     /* 8px */
  --space-sm: 0.75rem;    /* 12px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */

  /* Border Radii & Elevation */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 16px 32px -8px rgba(0, 0, 0, 0.65);
  --shadow-glow-emerald: 0 0 30px rgba(5, 150, 105, 0.2);

  /* Animation Tokens */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 450ms;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Global Reset & Font Anti-Distortion Rules */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-synthesis: none !important; /* Disable browser artificial weight/style smearing */
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
  font-family: var(--font-family-body);
  line-height: var(--font-line-height-body);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.font-display {
  font-family: var(--font-family-display);
  letter-spacing: var(--font-letter-spacing-tight);
}

.font-body {
  font-family: var(--font-family-body);
  letter-spacing: var(--font-letter-spacing-normal);
}

h1, h2, h3, h4 {
  font-family: var(--font-family-display);
  line-height: var(--font-line-height-heading);
  letter-spacing: var(--font-letter-spacing-tight);
  font-synthesis: none;
}

/* --------------------------------------------------------------------------
   2. KEYFRAME ANIMATIONS & ENTRANCE EFFECTS
   -------------------------------------------------------------------------- */
@keyframes fadeSlideUp {
  0% {
    opacity: 0;
    transform: translateY(24px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-entrance {
  animation-name: fadeSlideUp;
  animation-duration: var(--duration-slow);
  animation-timing-function: var(--ease-out);
  animation-fill-mode: both;
}

.delay-1 { animation-delay: 100ms; }
.delay-2 { animation-delay: 200ms; }
.delay-3 { animation-delay: 300ms; }
.delay-4 { animation-delay: 400ms; }

/* --------------------------------------------------------------------------
   3. NON-DEFAULT ASYMMETRIC COMMAND CENTER LAYOUT
   -------------------------------------------------------------------------- */
.app-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.asymmetric-hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-xl);
  align-items: stretch;
}

@media (max-width: 992px) {
  .asymmetric-hero-grid {
    grid-template-columns: 1fr;
  }
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.panel-surface {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

/* --------------------------------------------------------------------------
   4. CORE COMPONENTS & MICRO-INTERACTIONS
   -------------------------------------------------------------------------- */

/* MICRO-INTERACTION 1: Tactile Button Press Feedback */
.btn-tactile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-family-body);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  outline: none;
  transition: transform var(--duration-fast) var(--ease-bounce),
              background-color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard);
  user-select: none;
}

.btn-tactile:hover {
  transform: translateY(-2px);
}

.btn-tactile:active {
  transform: scale(0.96) translateY(0);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.4);
}

.btn-primary {
  background-color: var(--color-primary-base);
  color: var(--color-text-main);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-glow-emerald);
}

.btn-primary:active {
  background-color: var(--color-primary-active);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text-main);
  border-color: var(--color-border-subtle);
}

.btn-outline:hover {
  border-color: var(--color-border-hover);
  background-color: var(--color-bg-surface-hover);
}

/* MICRO-INTERACTION 2: Input Focus Transition */
.input-interactive {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-bg-base);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  color: var(--color-text-main);
  font-size: var(--font-size-sm);
  outline: none;
  transition: border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              background-color var(--duration-normal) var(--ease-out);
}

.input-interactive::placeholder {
  color: var(--color-text-muted);
}

.input-interactive:focus {
  border-color: var(--color-border-focus);
  background-color: var(--color-bg-surface);
  box-shadow: 0 0 0 3px var(--color-primary-glow), var(--shadow-sm);
}

/* MICRO-INTERACTION 3: Card Hover Elevation & Shimmer Transition */
.card-interactive {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  position: relative;
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out),
              background-color var(--duration-normal) var(--ease-out);
}

.card-interactive::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent-bar);
  opacity: 0.3;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.card-interactive:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
  background-color: var(--color-bg-surface-hover);
  box-shadow: var(--shadow-lg), var(--shadow-glow-emerald);
}

.card-interactive:hover::before {
  opacity: 1;
}

/* Badges & Counter Pills */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  padding: var(--space-3xs) var(--space-xs);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: var(--font-letter-spacing-uppercase);
}

.badge-emerald {
  background-color: var(--color-primary-subtle);
  color: var(--color-primary-hover);
  border: 1px solid rgba(5, 150, 105, 0.3);
}

.badge-amber {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent-base);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-sapphire {
  background-color: var(--color-secondary-subtle);
  color: var(--color-secondary-hover);
  border: 1px solid rgba(37, 99, 235, 0.3);
}

.stat-pill {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-base);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
}

.stat-pill-value {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-hover);
}

.stat-pill-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   5. PREFERS-REDUCED-MOTION ACCESSIBILITY ENFORCEMENT
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
    transform: none !important;
  }

  .animate-entrance {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }

  .btn-tactile:hover,
  .btn-tactile:active,
  .card-interactive:hover {
    transform: none !important;
  }
}