/* =========================
   🎨 DESIGN SYSTEM (LIGHT SaaS)
   ========================= */

body {
  background: #ffffff;
  font-family: 'Inter', sans-serif;
}

:root {
    

/* =========================
     🎨 COLORS
========================= */    

  /* 🎨 PRIMARY BRAND */
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-primary-soft: #eef2ff;

  /* 🎨 BACKGROUND SYSTEM */
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-surface-alt: #f9fafb;

  /* 🎨 TEXT SYSTEM */
  --color-text: #0f172a;
  --color-text-muted: #64748b;

  /* 🎨 BORDER */
  --color-border: #e5e7eb;

  /* 🎨 STATE COLORS */
  --color-success: #16a34a;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;

  /* 🌫️ SHADOW SYSTEM */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.08);

  /* 🔲 RADIUS SYSTEM */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* =========================
     🔠 TYPOGRAPHY
     ========================= */

  h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.3px;
  color: #0f172a;
}

h1 {
  font-size: 24px;
}

h2 {
  font-size: 20px;
}

  --text-xs: 12px;
  --text-sm: 14px;
  --text-md: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 30px;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* =========================
     📏 SPACING (STRICT SCALE)
     ========================= */

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;

  /* =========================
     🔲 RADIUS
     ========================= */

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* =========================
     🌫️ SHADOWS (SOFT & PREMIUM)
     ========================= */

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);

}

/* GLOBAL MOTION SYSTEM */
:root {
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* APPLY SMOOTHNESS TO EVERYTHING */
* {
  transition: 
    transform 0.25s var(--ease-smooth),
    box-shadow 0.25s var(--ease-smooth),
    background 0.2s var(--ease-smooth),
    border 0.2s var(--ease-smooth),
    color 0.2s var(--ease-smooth);
}

/* =========================
   🔄 RESET
   ========================= */

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

/* =========================
   🌐 BASE STYLES
   ========================= */

body {
  font-family: var(--font-base);
  font-size: var(--text-md);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

/* Links */
a {
  color: inherit;
  text-decoration: none;
}

/* Images */
img {
  max-width: 100%;
  display: block;
}


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

/* =========================
   🧰 UTILITIES
   ========================= */

.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.flex {
  display: flex;
}

.grid {
  display: grid;
}

.center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.hidden {
  display: none;
}

/* =========================
   🧰 UTILITIES UPGRADE CARDS
   ========================= */

.card {
  background: #ffffff;

  border: 1px solid #eef2f7; /* very soft border */

  border-radius: 14px;

  overflow: hidden;

  transition: all 0.25s ease;

  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

/* Hover = premium lift */
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.06);
}

/* =========================
   📱 RESPONSIVE BREAKPOINTS
   ========================= */

/* Mobile first (default) */

/* Tablets */
@media (min-width: 640px) {
}

/* Small laptops */
@media (min-width: 768px) {
}

/* Desktop */
@media (min-width: 1024px) {
}

/* Large screens */
@media (min-width: 1280px) {
}


/* =========================
   GLASS TOPBAR
   ========================= */

.topbar {
  background: #ffffff;
  border-bottom: 1px solid #f1f5f9;

  backdrop-filter: none;
}


/* =========================
   🔤 PREMIUM TYPOGRAPHY SYSTEM
   ========================= */

h1, .page-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: #0f172a;
}

h2 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 22px;
  font-weight: 600;
}

h3 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 18px;
  font-weight: 600;
}

/* Subtitle */
.page-subtitle {
  font-size: 15px;
  color: #64748b;
  font-weight: 400;
  margin-top: 4px;
}

/* Course title */
.course-title {
  font-size: 16px;
  font-weight: 600;
  color: #0f172a;
  line-height: 1.4;
}


/* =========================
   ✨ PREMIUM TEXT SYSTEM
   ========================= */

p {
  font-size: 15px;
  line-height: 1.6;
  color: #64748b;
  letter-spacing: -0.1px;
}

/* Subtitle (important text like header description) */
.page-subtitle {
  font-size: 15px;
  line-height: 1.6;
  color: #64748b;
  max-width: 520px;
}

/* Card supporting text */
.course-meta {
  font-size: 13px;
  color: #94a3b8;
}