/* PakGurus Light SaaS Theme & Design System (Refined & Polished) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Outfit:wght@500;600;700;800&display=swap');

:root {
  /* Canvas & Card Backgrounds */
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  
  /* Borders & Shadows */
  --border-light: #e2e8f0;
  --border-subtle: #f1f5f9;
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
  --shadow-hover: 0 12px 32px -4px rgba(15, 23, 42, 0.1), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
  
  /* Text Scale & Colors (WCAG AA Compliant) */
  --text-main: #0f172a;    /* Slate 900 */
  --text-sub: #334155;     /* Slate 700 */
  --text-muted: #64748b;   /* Slate 500 */

  /* Type Scale */
  --font-xs: 0.75rem;      /* 12px */
  --font-sm: 0.875rem;     /* 14px */
  --font-base: 1rem;       /* 16px */
  --font-lg: 1.125rem;     /* 18px */
  --font-xl: 1.5rem;       /* 24px */
  --font-2xl: 2rem;        /* 32px */
  --font-3xl: 3rem;        /* 48px */

  /* Primary Emerald Green */
  --accent-emerald: #10b981;
  --accent-emerald-dark: #047857;
  --accent-emerald-light: #ecfdf5;

  /* Secondary Violet / Purple */
  --accent-violet: #8b5cf6;
  --accent-violet-dark: #6d28d9;
  --accent-violet-light: #f5f3ff;

  /* Gradients */
  --gradient-emerald: linear-gradient(135deg, #10b981 0%, #0d9488 100%);
  --gradient-violet: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%);
  --gradient-hero: linear-gradient(180deg, #ecfdf5 0%, #f8fafc 100%);

  /* Fonts */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-main) !important;
  color: var(--text-main) !important;
  font-family: var(--font-body) !important;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading) !important;
  color: var(--text-main) !important;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-top: 0;
}

h1 { font-size: var(--font-3xl); margin-bottom: 1rem; }
h2 { font-size: var(--font-2xl); margin-bottom: 0.75rem; }
h3 { font-size: var(--font-xl); margin-bottom: 0.5rem; }
h4 { font-size: var(--font-lg); margin-bottom: 0.5rem; }

p {
  margin-top: 0;
  margin-bottom: 1rem;
}

a {
  color: var(--accent-emerald-dark);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-emerald);
  text-decoration: underline;
}

/* Accessibility Focus Ring */
:focus-visible {
  outline: 2px solid var(--accent-emerald) !important;
  outline-offset: 2px !important;
}

/* Container & Layout Scale */
.pakgurus-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Normalized Section Rhythm */
.pakgurus-section {
  padding: 4rem 0;
}

/* Cards & Grid System */
.pakgurus-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  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;
  will-change: transform, box-shadow;
}

.pakgurus-card:hover {
  transform: translateY(-4px);
  border-color: #cbd5e1;
  box-shadow: var(--shadow-hover);
}

.pakgurus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* Standardized Avatar Treatment */
.pakgurus-avatar {
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  border: 2px solid var(--border-light);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
  background-color: var(--bg-subtle);
  flex-shrink: 0;
}

.pakgurus-avatar-sm {
  width: 44px;
  height: 44px;
}

.pakgurus-avatar-md {
  width: 56px;
  height: 56px;
}

.pakgurus-avatar-lg {
  width: 120px;
  height: 120px;
}

.pakgurus-avatar-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-emerald);
  color: #ffffff;
  font-weight: 700;
  font-family: var(--font-heading);
}

/* Standardized Badges & Pills */
.pakgurus-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  font-size: var(--font-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1;
  height: 26px;
  white-space: nowrap;
}

.pakgurus-badge-free {
  background: #ecfdf5;
  color: #047857;
  border: 1px solid #a7f3d0;
}

.pakgurus-badge-diamond {
  background: #f5f3ff;
  color: #6d28d9;
  border: 1px solid #ddd6fe;
}

.pakgurus-badge-gem {
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
}

.pakgurus-badge-rising {
  background: #fff7ed;
  color: #c2410c;
  border: 1px solid #fed7aa;
}

/* Standardized Buttons */
.pakgurus-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.625rem 1.25rem;
  border-radius: 12px;
  font-family: var(--font-body);
  font-size: var(--font-sm);
  font-weight: 600;
  line-height: 1;
  text-align: center;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease, background-color 0.15s ease;
  user-select: none;
  white-space: nowrap;
}

.pakgurus-btn:active {
  transform: translateY(0) scale(0.98) !important;
}

.pakgurus-btn-primary {
  background: var(--gradient-emerald);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.28);
}

.pakgurus-btn-primary:hover {
  filter: brightness(1.05);
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.4);
  text-decoration: none;
  transform: translateY(-1px);
}

.pakgurus-btn-secondary {
  background: var(--gradient-violet);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.25);
}

.pakgurus-btn-secondary:hover {
  filter: brightness(1.05);
  box-shadow: 0 6px 18px rgba(139, 92, 246, 0.38);
  text-decoration: none;
  transform: translateY(-1px);
}

.pakgurus-btn-outline {
  background: #ffffff;
  color: var(--text-sub) !important;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.pakgurus-btn-outline:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
  color: var(--text-main) !important;
  text-decoration: none;
  transform: translateY(-1px);
}

/* Header Navbar */
.pakgurus-header {
  background: #ffffff;
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-light);
  padding: 0.875rem 0;
  box-shadow: var(--shadow-sm);
}

.pakgurus-nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pakgurus-logo {
  font-family: var(--font-heading);
  font-size: 1.625rem;
  font-weight: 800;
  color: #10b981 !important;
  display: inline-flex;
  align-items: center;
  letter-spacing: -0.03em;
}

.pakgurus-logo span {
  color: #8b5cf6;
}

.pakgurus-nav-menu {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}

.pakgurus-nav-menu a {
  color: var(--text-sub);
  font-weight: 500;
  font-size: var(--font-sm);
  padding: 0.4rem 0.25rem;
}

.pakgurus-nav-menu a:hover {
  color: var(--accent-emerald-dark);
  text-decoration: none;
}

/* Hero Section */
.pakgurus-hero {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
  background: var(--gradient-hero);
  border-bottom: 1px solid var(--border-light);
}

.pakgurus-hero-title {
  font-size: var(--font-3xl);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.pakgurus-hero-title span {
  background: var(--gradient-emerald);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.pakgurus-hero-desc {
  font-size: var(--font-lg);
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto 2rem;
  line-height: 1.65;
}

/* Ad Slots (Silent & Hidden when Empty) */
.pakgurus-ad-slot {
  display: none;
  margin: 1.5rem 0;
  text-align: center;
}

.pakgurus-ad-slot.ins-loaded {
  display: block;
  min-height: 90px;
}

/* Key Term Callout Cards & Lesson Content Polish */
.pakgurus-keyterm {
  background: #ecfdf5 !important;
  border-left: 4px solid #10b981 !important;
  padding: 1.25rem 1.5rem !important;
  border-radius: 12px !important;
  margin: 2rem 0 !important;
  color: #047857 !important;
  font-size: var(--font-base) !important;
  line-height: 1.7 !important;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.06) !important;
}

.pakgurus-keyterm strong {
  color: #047857 !important;
  font-family: var(--font-heading);
}

.pakgurus-lesson-body p {
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .pakgurus-hero {
    padding: 3rem 0 2.5rem;
  }

  .pakgurus-hero-title {
    font-size: 2.25rem;
  }

  .pakgurus-hero-desc {
    font-size: 1rem;
  }

  .pakgurus-section {
    padding: 2.5rem 0;
  }

  .pakgurus-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .pakgurus-nav-menu {
    gap: 0.85rem;
  }

  .pakgurus-nav-menu a {
    font-size: 0.8125rem;
  }
}