:root {
  /* Brand Identity - Grounded in Official MyOnSchool Logo */
  --sn-primary: #009AE0;           /* Vibrant Sky Blue */
  --sn-primary-hover: #0082C8;
  --sn-primary-light: rgba(0, 154, 224, 0.10);
  --sn-primary-glow: rgba(0, 154, 224, 0.28);
  
  --sn-accent: #69A033;            /* Fresh Growth Leaf Green */
  --sn-accent-hover: #58892A;
  --sn-accent-light: rgba(105, 160, 51, 0.12);
  --sn-accent-glow: rgba(105, 160, 51, 0.25);

  --sn-secondary: #69A033;
  --sn-secondary-light: rgba(105, 160, 51, 0.10);

  /* Modern Light Theme Bases */
  --sn-bg-app: #F8FAFC;            /* Clean Slate Dawn */
  --sn-bg-alt: #FFFFFF;            /* Pure Crisp White for Alternate Sections */
  --sn-bg-warm: #F0F7FF;           /* Subtle cool sky tint accent */
  --sn-bg-subtle: #F1F5F9;

  /* Header & Footer Deep Slate Navy */
  --sn-navy-950: #08182B;
  --sn-navy-900: #0D213A;
  --sn-navy-800: #142C4C;
  --sn-navy-700: #0F2E5C;

  /* Card Surfaces & Glass */
  --sn-surface-card: #FFFFFF;
  --sn-surface-card-hover: #FFFFFF;
  --sn-surface-card-border: #E2E8F0;
  --sn-surface-card-border-active: rgba(0, 154, 224, 0.55);
  
  /* Standardized Typographic Scale (8 core sizes) */
  --sn-text-xs: 0.75rem;    /* 12px - tags, pills, meta badges */
  --sn-text-sm: 0.875rem;   /* 14px - secondary text, table data, subtexts */
  --sn-text-base: 1rem;     /* 16px - standard body, inputs, navigation */
  --sn-text-lg: 1.125rem;   /* 18px - lead paragraphs, card titles */
  --sn-text-xl: 1.25rem;    /* 20px - modal titles, prominent subheadings */
  --sn-text-2xl: 1.5rem;    /* 24px - h3 headings */
  --sn-text-3xl: 1.875rem;  /* 30px - h2, section titles */
  --sn-text-4xl: 2.25rem;   /* 36px - h1, hero headlines */

  /* Unified Text Color Palette (Strictly 8 semantic tokens) */
  --sn-text-main: #0F2E5C;          /* Deep Corporate Navy - primary headings & titles */
  --sn-text-body: #334155;          /* Slate Dark - body paragraphs */
  --sn-text-muted: #64748B;         /* Slate Medium - secondary descriptions */
  --sn-text-dim: #94A3B8;           /* Slate Light - subtle hints & icons */
  --sn-text-inverse: #FFFFFF;       /* Pure White - high contrast on dark */
  --sn-text-inverse-muted: #E2E8F0; /* Soft Slate White - secondary on dark */
  --sn-text-brand: #009AE0;         /* Sky Blue - brand highlights */
  --sn-text-accent: #69A033;        /* Leaf Green - growth highlights */

  /* Spacing & Borders */
  --sn-container-width: 1220px;
  --sn-radius-xs: 6px;
  --sn-radius-sm: 8px;
  --sn-radius-md: 12px;
  --sn-radius-lg: 18px;
  --sn-radius-xl: 24px;
  --sn-radius-full: 9999px;

  /* Shadows - Crisp & Multi-Layered */
  --sn-shadow-sm: 0 1px 3px rgba(15, 46, 92, 0.05);
  --sn-shadow-card: 0 4px 16px -2px rgba(15, 46, 92, 0.06), 0 1px 3px rgba(15, 46, 92, 0.04);
  --sn-shadow-hover: 0 14px 30px -4px rgba(15, 46, 92, 0.12), 0 0 0 1px rgba(0, 154, 224, 0.35);
  --sn-shadow-glow: 0 0 24px rgba(0, 154, 224, 0.28);
  --sn-shadow-float: 0 20px 40px -10px rgba(15, 46, 92, 0.2);

  /* Neumorphism (Soft UI Extrusion & Recessed Insets) */
  --sn-neumorph-bg: #F0F4F8;
  --sn-neumorph-card-bg: linear-gradient(145deg, #FFFFFF 0%, #F3F7FB 100%);
  --sn-neumorph-card-surface: #F8FAFD;
  --sn-neumorph-shadow: -8px -8px 20px #FFFFFF, 8px 8px 20px rgba(15, 46, 92, 0.08);
  --sn-neumorph-shadow-sm: -4px -4px 12px #FFFFFF, 4px 4px 12px rgba(15, 46, 92, 0.06);
  --sn-neumorph-shadow-lg: -12px -12px 28px #FFFFFF, 12px 12px 28px rgba(15, 46, 92, 0.11);
  --sn-neumorph-inset: inset 3px 3px 6px rgba(15, 46, 92, 0.06), inset -3px -3px 6px #FFFFFF;
  --sn-neumorph-inset-sm: inset 2px 2px 4px rgba(15, 46, 92, 0.05), inset -2px -2px 4px #FFFFFF;
  --sn-neumorph-hover: -10px -10px 24px #FFFFFF, 10px 10px 24px rgba(0, 154, 224, 0.18);
  --sn-neumorph-border: 1px solid rgba(255, 255, 255, 0.85);

  /* Fonts */
  --sn-font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --sn-ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Setup */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--sn-font-main);
  scroll-behavior: smooth;
  background-color: var(--sn-bg-app);
  color: var(--sn-text-body);
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--sn-bg-app);
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

ul {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

/* Top Sticky Reading / Scroll Progress Bar */
.sn-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3.5px;
  width: 0%;
  background: linear-gradient(90deg, #009AE0 0%, #69A033 100%);
  box-shadow: 0 0 10px rgba(0, 154, 224, 0.6);
  z-index: 10001;
  pointer-events: none;
  transition: width 0.1s linear;
}

/* Container */
.sn-container {
  width: 100%;
  max-width: var(--sn-container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

@media (max-width: 640px) {
  .sn-container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* Section Spacing - Tightened & Optimized (Eliminated excess gaps) */
.sn-section {
  padding: 30px 0;
  position: relative;
}

.sn-section-sm {
  padding: 20px 0;
  position: relative;
}

/* Alternating Section Background Utilities */
.sn-section-alt {
  background-color: #FFFFFF !important;
}

/* Geometric High-Fidelity Background Patterns */
.sn-bg-dots {
  background-color: #F8FAFC !important;
  background-image: radial-gradient(#CBD5E1 1.6px, transparent 1.6px) !important;
  background-size: 22px 22px !important;
}

.sn-bg-dots-alt {
  background-color: #FFFFFF !important;
  background-image: radial-gradient(rgba(0, 154, 224, 0.2) 1.6px, transparent 1.6px) !important;
  background-size: 24px 24px !important;
}

.sn-bg-grid {
  background-color: #F8FAFC !important;
  background-image: linear-gradient(to right, rgba(15, 46, 92, 0.06) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(15, 46, 92, 0.06) 1px, transparent 1px) !important;
  background-size: 28px 28px !important;
}

.sn-bg-mesh {
  background: radial-gradient(at 15% 15%, rgba(0, 154, 224, 0.1) 0px, transparent 50%),
              radial-gradient(at 85% 85%, rgba(105, 160, 51, 0.08) 0px, transparent 50%),
              #F8FAFC !important;
}

/* Balanced Headings - Scaled Down for Clean Editorial Hierarchy */
.sn-section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 18px auto;
}

.sn-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 12px;
  border-radius: var(--sn-radius-full);
  font-size: var(--sn-text-xs);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: none;
  background: var(--sn-primary-light);
  color: var(--sn-primary);
  border: 1px solid rgba(0, 154, 224, 0.35);
  margin-bottom: 8px;
}

.sn-badge-pill svg {
  width: 14px;
  height: 14px;
}

.sn-section-title {
  font-size: clamp(1.4rem, 2.4vw, 1.85rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--sn-text-main);
  letter-spacing: -0.025em;
  margin-bottom: 6px;
}

.sn-text-gradient {
  background: linear-gradient(135deg, #009AE0 0%, #0072B5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sn-section-desc {
  font-size: 0.92rem;
  color: var(--sn-text-muted);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .sn-section {
    padding: 20px 0;
  }
  .sn-section-sm {
    padding: 14px 0;
  }
  .sn-section-title {
    font-size: 1.35rem;
  }
  .sn-section-header {
    margin-bottom: 14px;
  }
}

/* Interactive Buttons */
.sn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: var(--sn-text-base);
  font-weight: 600;
  border-radius: var(--sn-radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.22s var(--sn-ease-spring), box-shadow 0.22s var(--sn-ease-spring), background 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}

.sn-btn-primary {
  background: linear-gradient(135deg, #009AE0 0%, var(--sn-primary-hover) 100%);
  color: #FFFFFF;
  font-weight: 700;
  box-shadow: 0 3px 12px rgba(0, 154, 224, 0.25);
  border: 1px solid rgba(0, 154, 224, 0.4);
}

.sn-btn-primary:hover {
  background: linear-gradient(135deg, #0ea5e9 0%, #0082C8 100%);
  box-shadow: 0 6px 18px rgba(0, 154, 224, 0.4);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.sn-btn-accent {
  background: var(--sn-accent);
  color: #FFFFFF;
  font-weight: 600;
  box-shadow: 0 3px 12px rgba(2, 132, 199, 0.25);
}

.sn-btn-accent:hover {
  background: var(--sn-accent-hover);
  box-shadow: 0 6px 18px rgba(2, 132, 199, 0.35);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.sn-btn-outline {
  background: #FFFFFF;
  color: var(--sn-text-main);
  border: 1px solid #CBD5E1;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.sn-btn-outline:hover {
  background: #F8FAFC;
  border-color: var(--sn-primary);
  color: var(--sn-text-brand);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 44, 72, 0.08);
}

.sn-btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #FFFFFF !important;
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(8px);
}

.sn-btn-ghost:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: #FFFFFF;
  color: #FFFFFF !important;
  transform: translateY(-2px);
}

.sn-btn-navy {
  background: var(--sn-navy-700);
  color: #FFFFFF;
  font-weight: 600;
}

.sn-btn-navy:hover {
  background: var(--sn-navy-800);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 44, 72, 0.2);
}

.sn-btn-sm {
  padding: 7px 16px;
  font-size: var(--sn-text-sm);
}

.sn-btn-lg {
  padding: 13px 28px;
  font-size: var(--sn-text-base);
}

.sn-btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}

.sn-btn:hover svg {
  transform: translateX(3px);
}

/* Modals */
.sn-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 20, 36, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.sn-modal-backdrop.is-active {
  display: flex;
  opacity: 1;
}

.sn-modal-card {
  width: 100%;
  max-width: 520px;
  background: #FFFFFF;
  border: 1px solid var(--sn-surface-card-border);
  border-radius: var(--sn-radius-lg);
  padding: 32px;
  box-shadow: var(--sn-shadow-float);
  position: relative;
  transform: scale(0.95);
  transition: transform 0.25s ease;
}

.sn-modal-backdrop.is-active .sn-modal-card {
  transform: scale(1);
}

.sn-modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  background: #F1F5F9;
  border: 1px solid #E2E8F0;
  color: var(--sn-text-muted);
  width: 34px;
  height: 34px;
  border-radius: var(--sn-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sn-modal-close:hover {
  background: #E2E8F0;
  color: var(--sn-text-main);
}

.sn-modal-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--sn-text-main);
}

.sn-modal-subtitle {
  font-size: 0.9rem;
  color: var(--sn-text-muted);
  margin-bottom: 22px;
}

/* Forms */
.sn-form-group {
  margin-bottom: 16px;
}

.sn-label {
  display: block;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--sn-text-main);
  margin-bottom: 5px;
}

.sn-input, .sn-select, .sn-textarea {
  width: 100%;
  padding: 10px 14px;
  background: #FFFFFF;
  border: 1px solid #CBD5E1;
  border-radius: var(--sn-radius-md);
  color: var(--sn-text-main);
  font-size: 0.93rem;
  transition: all 0.2s ease;
}

.sn-input:focus, .sn-select:focus, .sn-textarea:focus {
  background: #FFFFFF;
  border-color: var(--sn-primary);
  box-shadow: 0 0 0 3px rgba(0, 154, 224, 0.22);
}

.sn-select option {
  background-color: #FFFFFF;
  color: var(--sn-text-main);
}

.sn-form-alert {
  padding: 12px 16px;
  border-radius: var(--sn-radius-md);
  font-size: 0.88rem;
  margin-bottom: 16px;
  display: none;
}

.sn-form-alert.sn-alert-success {
  background: #ECFDF5;
  color: #065F46;
  border: 1px solid #A7F3D0;
  display: block;
}

.sn-form-alert.sn-alert-error {
  background: #FEF2F2;
  color: #991B1B;
  border: 1px solid #FECACA;
  display: block;
}