/* ============================================================
   KidsCoding — Modern Colorful Design System
   A playful, kid-friendly UI with clean shadows & bright colors
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Kanit:wght@400;500;600;700&family=Prompt:wght@300;400;500&display=swap');

/* ---------- 1. Variables ---------- */
:root {
  --white: #ffffff;
  --bg: #f4f6fc;
  --bg-alt: #eef1f9;

  --primary: #6c5ce7;
  --primary-dark: #5a4bd1;
  --primary-light: #a29bfe;
  --primary-bg: rgba(108,92,231,.08);

  --secondary: #fd79a8;
  --secondary-dark: #e66b94;

  --accent: #00cec9;
  --accent-light: #55efc4;

  --green: #00b894;
  --yellow: #fdcb6e;
  --orange: #e17055;
  --red: #ff7675;
  --teal: #00cec9;
  --blue: #74b9ff;

  --text: #2d3436;
  --text-sec: #636e72;
  --text-light: #b2bec3;
  --border: #dfe6e9;

  --shadow-sm: 0 2px 8px rgba(0,0,0,.06);
  --shadow: 0 4px 20px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
  --shadow-color: 0 4px 20px rgba(108,92,231,.18);

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 40px;
  --radius-full: 9999px;

  --font-head: 'Kanit', sans-serif;
  --font-body: 'Prompt', sans-serif;
  --font-code: 'Fira Code', monospace;

  --ease: cubic-bezier(.4,0,.2,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font-body);line-height:1.65;overflow-x:hidden;-webkit-font-smoothing:antialiased}
ul,ol{list-style:none}
a{text-decoration:none;color:inherit;transition:.25s var(--ease)}
img{max-width:100%;height:auto;display:block}
button{cursor:pointer;font-family:inherit}

/* ---------- 3. Typography ---------- */
h1,h2,h3,h4,h5,h6{font-family:var(--font-head);color:var(--text);line-height:1.25;margin-bottom:.75rem}
h1{font-size:2.8rem;font-weight:700;letter-spacing:-.5px}
h2{font-size:2.2rem;font-weight:700;letter-spacing:-.3px}
h3{font-size:1.5rem;font-weight:600}
h4{font-size:1.25rem;font-weight:600}
p{margin-bottom:1rem;color:var(--text-sec);font-weight:300}
code,pre{font-family:var(--font-code);font-size:.9em}

/* ---------- 4. Layout ---------- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 5. Header / Navbar ---------- */
.main-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  padding:14px 0;
  transition:.3s var(--ease);
}
.navbar{display:flex;align-items:center;justify-content:space-between}
.logo{
  font-family:var(--font-head);font-size:1.6rem;font-weight:700;
  color:var(--primary);display:flex;align-items:center;gap:6px;
}
.nav-links{display:flex;align-items:center;gap:8px}
.nav-links a{
  padding:8px 16px;border-radius:var(--radius-sm);
  font-weight:500;font-size:.95rem;color:var(--text-sec);
  transition:.25s var(--ease);
}
.nav-links a:hover{color:var(--primary);background:var(--primary-bg)}
.lang-switch{
  width:38px;height:38px;display:flex;align-items:center;justify-content:center;
  border-radius:var(--radius-sm);font-weight:600;font-size:.85rem;
  color:var(--text-sec);background:var(--bg);
}
.lang-switch:hover{color:var(--primary);background:var(--primary-bg)}

/* Mobile menu */
.mobile-menu-btn{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:40px;height:40px;background:var(--bg);border:none;
  border-radius:var(--radius-sm);padding:9px;
}
.mobile-menu-btn span{display:block;width:100%;height:2.5px;background:var(--text);border-radius:2px;transition:.3s var(--ease)}

/* ---------- 6. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 28px;border:none;border-radius:var(--radius-sm);
  font-family:var(--font-head);font-weight:600;font-size:.95rem;
  cursor:pointer;text-decoration:none;
  transition:.3s var(--ease);min-height:46px;
}
.btn:active{transform:scale(.97)}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));
  color:#fff;box-shadow:var(--shadow-color);
}
.btn-primary:hover{
  background:linear-gradient(135deg,var(--primary-dark),var(--primary));
  box-shadow:0 6px 24px rgba(108,92,231,.28);transform:translateY(-2px);
  color:#fff;
}
.btn-outline{
  background:var(--white);color:var(--primary);
  border:2px solid var(--primary-light);
}
.btn-outline:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-accent{background:linear-gradient(135deg,var(--accent),var(--green));color:#fff;box-shadow:0 4px 15px rgba(0,206,201,.25)}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,206,201,.35)}
.btn-danger{background:var(--red);color:#fff}
.btn-large{padding:16px 40px;font-size:1.05rem;border-radius:var(--radius)}
.btn-small{padding:8px 18px;font-size:.85rem}
.btn-block{width:100%}

/* nav buttons */
.nav-links .btn-primary{padding:8px 20px;min-height:auto;font-size:.9rem;border-radius:var(--radius-sm)}

/* ---------- 7. Cards ---------- */
.card,
.feature-card,
.course-card,
.testimonial-card,
.pricing-card,
.stat-card,
.form-card{
  background:var(--white);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  transition:.35s var(--ease);
}
.feature-card:hover,
.course-card:hover,
.testimonial-card:hover,
.stat-card:hover,
.card:hover{
  box-shadow:var(--shadow-lg);
  transform:translateY(-6px);
}

/* ---------- 8. Sections ---------- */
section{padding:80px 0}
.section-title{
  text-align:center;margin-bottom:48px;
  font-family:var(--font-head);
}
.section-title::after{
  content:'';display:block;width:50px;height:4px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  border-radius:2px;margin:14px auto 0;
}

/* ---------- 9. Hero ---------- */
.hero-section{
  padding:100px 0 80px;
  background:linear-gradient(170deg,#f4f6fc 0%,#e8e4ff 50%,#fce4ec 100%);
  position:relative;overflow:hidden;
}
.hero-section::before{
  content:'';position:absolute;top:-120px;right:-120px;
  width:400px;height:400px;border-radius:50%;
  background:radial-gradient(circle,rgba(108,92,231,.12) 0%,transparent 70%);
}
.hero-content{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.hero-title{font-size:3rem;line-height:1.15;margin-bottom:20px}
.hero-subtitle{font-size:1.15rem;line-height:1.8;max-width:92%;margin-bottom:28px;color:var(--text-sec)}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}

/* Hero illustration */
.hero-illustration{display:flex;align-items:center;justify-content:center}
.coding-illustration{position:relative;width:100%;max-width:380px;height:380px;display:flex;align-items:center;justify-content:center}
.emoji-art{
  width:240px;height:240px;border-radius:50%;
  background:var(--white);box-shadow:var(--shadow-lg);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:12px;font-size:3.2rem;padding:28px;
  animation:pulse 4s ease-in-out infinite alternate;
}
.floating-block{
  position:absolute;padding:10px 20px;
  background:var(--white);border-radius:var(--radius-xl);
  box-shadow:var(--shadow);
  font-family:var(--font-code);font-weight:500;font-size:.82rem;
  white-space:nowrap;z-index:2;
}
.block-1{top:12%;left:-5%;color:var(--primary);animation:float 5s ease-in-out infinite}
.block-2{bottom:12%;right:0;color:var(--secondary);animation:float 5s ease-in-out infinite 2.5s}

/* ---------- 10. Features ---------- */
.why-coding-section{background:var(--white)}
.features-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:28px;
}
.feature-card{padding:32px 28px;text-align:center}
.feature-icon{
  width:72px;height:72px;border-radius:var(--radius);
  background:var(--primary-bg);
  display:flex;align-items:center;justify-content:center;
  font-size:2rem;margin:0 auto 18px;
}
.feature-card h3{font-size:1.2rem;margin-bottom:8px}
.feature-card p{font-size:.92rem;line-height:1.7;margin-bottom:0}

/* ---------- 11. Curriculum / Courses ---------- */
.courses-preview{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:28px;
}
.course-card{padding:32px;text-align:center}
.course-card .course-icon{
  font-size:2.8rem;width:72px;height:72px;
  display:flex;align-items:center;justify-content:center;
  border-radius:var(--radius);background:var(--bg);margin:0 auto 16px;
}
.course-card h3{font-size:1.15rem;margin-bottom:6px}
.course-card p{font-size:.9rem;margin-bottom:16px}
.course-card .btn{width:100%}

/* ---------- 12. How It Works ---------- */
.how-it-works-section{background:var(--white)}
.steps-container{display:flex;justify-content:space-between;position:relative;margin-top:40px}
.steps-container::before{
  content:'';position:absolute;top:36px;left:15%;right:15%;
  height:3px;
  background:repeating-linear-gradient(90deg,var(--border) 0,var(--border) 8px,transparent 8px,transparent 16px);
}
.step{flex:1;text-align:center;position:relative;z-index:1;padding:0 16px}
.step-number{
  width:72px;height:72px;font-size:1.6rem;font-weight:700;
  font-family:var(--font-head);color:var(--white);
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  border-radius:50%;margin:0 auto 16px;
  box-shadow:var(--shadow-color);
}
.step h3{font-size:1.05rem;margin-bottom:6px}
.step p{font-size:.88rem;max-width:200px;margin:0 auto}

/* ---------- 13. Testimonials ---------- */
.testimonials-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(360px,1fr));
  gap:28px;
}
.testimonial-card{padding:32px;position:relative}
.testimonial-card p{font-style:italic;font-size:1.02rem;line-height:1.85;position:relative;z-index:1}
.testimonial-card p::before{
  content:'\201C';position:absolute;top:-18px;left:-6px;
  font-size:4.5rem;font-family:Georgia,serif;color:var(--primary-light);opacity:.25;line-height:1;
}
.testimonial-card .author{font-weight:600;color:var(--primary);margin-top:14px;font-size:.92rem}

/* ---------- 14. Pricing ---------- */
.pricing-cards{display:flex;justify-content:center;gap:28px;flex-wrap:wrap}
.pricing-card{
  flex:1;min-width:280px;max-width:360px;
  padding:40px 32px;text-align:center;position:relative;
}
.pricing-card.premium{
  border:2px solid var(--primary);transform:scale(1.04);
  box-shadow:var(--shadow-lg),0 0 0 4px var(--primary-bg);
}
.pricing-card.premium:hover{transform:scale(1.07)}
.pricing-card h3{font-size:1.3rem}
.price{
  font-size:3rem;font-weight:700;font-family:var(--font-head);
  color:var(--primary);margin:12px 0 20px;
}
.price span{font-size:1rem;color:var(--text-sec);font-weight:400}
.features-list{text-align:left;margin-bottom:24px}
.features-list li{padding:8px 0;font-size:.92rem;color:var(--text-sec);display:flex;align-items:center;gap:8px}
.badge{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:linear-gradient(135deg,var(--secondary),var(--primary));
  color:#fff;padding:5px 18px;font-size:.78rem;font-weight:600;
  border-radius:var(--radius-full);white-space:nowrap;z-index:5;
}

/* ---------- 15. CTA ---------- */
.cta-section{
  text-align:center;
  background:linear-gradient(135deg,var(--primary) 0%,#a29bfe 100%);
  color:#fff;
}
.cta-section h2{color:#fff;font-size:2.4rem;margin-bottom:12px}
.cta-section p{color:rgba(255,255,255,.85);font-size:1.12rem;max-width:560px;margin:0 auto 28px}
.cta-section .btn-primary{background:var(--white);color:var(--primary);box-shadow:var(--shadow)}
.cta-section .btn-primary:hover{background:#f8f9fa;transform:translateY(-2px)}

/* ---------- 16. Footer ---------- */
.main-footer{
  background:var(--white);border-top:1px solid var(--border);
  padding:40px 0;margin-top:0;
}
.footer-content{text-align:center}
.footer-content p{color:var(--text-sec);font-size:.88rem;margin-bottom:8px}
.footer-content a{color:var(--primary);font-weight:500}
.footer-content a:hover{color:var(--primary-dark)}

/* ---------- 17. Forms ---------- */
.form-card{padding:40px;max-width:500px;margin:40px auto}
.form-card h1,.form-card h2{text-align:center;margin-bottom:28px;font-size:1.8rem}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-weight:500;margin-bottom:7px;font-size:.9rem;color:var(--text)}
.form-group input,
.form-group textarea,
.form-group select,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,select{
  width:100%;padding:13px 16px;
  border:2px solid var(--border);border-radius:var(--radius-sm);
  background:var(--white);color:var(--text);
  font-family:var(--font-body);font-size:.95rem;
  transition:.25s var(--ease);outline:none;
}
.form-group input:focus,input:focus,textarea:focus,select:focus{
  border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-bg);
}
input::placeholder,textarea::placeholder{color:var(--text-light)}
.checkbox-group{display:flex;align-items:flex-start;gap:10px}
.checkbox-group input[type="checkbox"]{width:18px;height:18px;margin-top:3px;accent-color:var(--primary)}
.checkbox-group label{font-size:.88rem;line-height:1.5}
.auth-container{display:flex;align-items:center;justify-content:center;min-height:75vh;padding:32px}
.auth-links{text-align:center;margin-top:20px;font-size:.9rem}
.auth-links a{color:var(--primary);font-weight:500}
.auth-links a:hover{text-decoration:underline}

/* ---------- 18. Alerts ---------- */
.alert{
  padding:14px 22px;border-radius:var(--radius-sm);margin-bottom:20px;
  font-weight:500;font-size:.92rem;
  border-left:4px solid;animation:slideDown .4s var(--ease);
}
.alert-success{background:#d4edda;border-left-color:var(--green);color:#155724}
.alert-danger{background:#f8d7da;border-left-color:var(--red);color:#721c24}
.alert-info{background:#d1ecf1;border-left-color:var(--blue);color:#0c5460}
.alert-warning{background:#fff3cd;border-left-color:var(--yellow);color:#856404}

/* ---------- 19. Dashboard ---------- */
.stats-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:20px;margin-bottom:32px;
}
.stat-card{padding:28px;text-align:center}
.stat-icon{font-size:2rem;margin-bottom:10px}
.stat-value{font-size:2.2rem;font-weight:700;font-family:var(--font-head);color:var(--primary)}
.stat-label{font-size:.88rem;color:var(--text-sec);margin-top:4px}

.progress-bar-container{
  height:12px;background:var(--bg);
  border-radius:6px;overflow:hidden;margin-top:8px;
}
.progress-bar-fill{
  height:100%;border-radius:6px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  transition:width .6s var(--ease);
}

/* ---------- 20. Tables ---------- */
.table-container{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
table{width:100%;border-collapse:collapse}
th{background:var(--bg);padding:14px 18px;text-align:left;font-family:var(--font-head);font-weight:600;font-size:.88rem}
td{padding:14px 18px;border-bottom:1px solid var(--border);font-size:.9rem}
tr:hover td{background:var(--bg)}

/* ---------- 21. Lesson Layout ---------- */
.lesson-layout{display:grid;grid-template-columns:260px 1fr;gap:28px;padding:32px 0}
.lesson-sidebar{
  background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:20px;height:fit-content;position:sticky;top:90px;
}
.lesson-sidebar a{display:block;padding:10px 14px;border-radius:var(--radius-sm);margin-bottom:4px;color:var(--text-sec);font-size:.9rem}
.lesson-sidebar a:hover,.lesson-sidebar a.active{color:var(--primary);background:var(--primary-bg)}
.lesson-content{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px}
.lesson-content h3{color:var(--primary);font-size:1.25rem;margin-top:28px;margin-bottom:12px}
.lesson-content p{line-height:1.9;font-size:.98rem}

/* ---------- 22. Cookie Banner ---------- */
.cookie-banner{
  position:fixed;bottom:0;left:0;right:0;background:var(--white);
  box-shadow:0 -4px 20px rgba(0,0,0,.1);
  padding:18px 28px;z-index:9999;
  display:flex;align-items:center;justify-content:center;gap:20px;flex-wrap:wrap;
  animation:slideUp .5s var(--ease);
}

/* ---------- 23. Main Content ---------- */
.main-content{min-height:calc(100vh - 140px)}

/* ---------- 24. Animations ---------- */
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes pulse{0%{transform:scale(1)}100%{transform:scale(1.04)}}
@keyframes slideDown{from{opacity:0;transform:translateY(-16px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* ---------- 25. Responsive ---------- */
@media(max-width:992px){
  .hero-content{grid-template-columns:1fr;text-align:center}
  .hero-subtitle{max-width:100%;margin-left:auto;margin-right:auto}
  .hero-actions{justify-content:center}
  .hero-illustration{max-height:320px;margin-top:32px}
  .hero-title{font-size:2.2rem}
  .steps-container{flex-direction:column;align-items:center;gap:32px}
  .steps-container::before{display:none}
  .pricing-cards{flex-direction:column;align-items:center}
  .pricing-card.premium{transform:scale(1)}
  .lesson-layout{grid-template-columns:1fr}
  .lesson-sidebar{position:static}
  .testimonials-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  section{padding:50px 0}
  h1,.hero-title{font-size:1.9rem}
  h2{font-size:1.6rem}
  .mobile-menu-btn{display:flex}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--white);flex-direction:column;padding:16px;
    box-shadow:var(--shadow-lg);border-radius:0 0 var(--radius) var(--radius);
    gap:4px;
  }
  .nav-links.active{display:flex}
  .navbar{position:relative}
  .features-grid,.courses-preview{grid-template-columns:1fr}
  .form-card{margin:20px 16px;padding:28px 24px}
}
@media(min-width:769px){.mobile-menu-btn{display:none}}