/* ==========================================================
   LearnWithKishore — design tokens
   Change brand colors here; every component reads these.
   ========================================================== */
:root {
  --color-primary: #0866FF;
  --color-primary-hover: #0654D6;
  --color-primary-soft: #E7F3FF;
  --color-on-primary: #FFFFFF;
  --color-secondary: #1877F2;
  --color-accent: #24873A;
  --color-accent-hover: #1D7030;
  --color-accent-soft: #EAF7EC;
  --color-on-accent: #FFFFFF;
  --color-background: #FFFFFF;
  --color-surface: #F0F2F5;
  --color-foreground: #1C1E21;
  --color-card: #FFFFFF;
  --color-muted-foreground: #65676B;
  --color-border: #DADDE1;
  --color-border-strong: #CED0D4;
  --color-ring: #0866FF;
  --color-success: #15803D;
  --color-error: #DC2626;

  --font-heading: "Space Grotesk", system-ui, sans-serif;
  --font-body: "DM Sans", system-ui, sans-serif;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(28, 30, 33, .06), 0 1px 3px rgba(28, 30, 33, .08);
  --shadow-md: 0 4px 12px rgba(28, 30, 33, .06), 0 12px 32px rgba(8, 102, 255, .08);
  --shadow-lg: 0 20px 50px rgba(8, 102, 255, .16);

  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-6: 24px; --space-8: 32px; --space-12: 48px; --space-16: 64px; --space-24: 96px;

  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --dur-fast: 160ms;
  --dur-med: 280ms;

  --container: 1200px;
  --header-h: 72px;
  --z-header: 40;
  --z-menu: 50;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-foreground);
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
h1, h2, h3, h4 { font-family: var(--font-heading); line-height: 1.15; margin: 0; letter-spacing: -0.02em; text-wrap: balance; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

:focus-visible { outline: 3px solid var(--color-ring); outline-offset: 3px; border-radius: 6px; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 16px; }
@media (min-width: 768px) { .container { padding-inline: 32px; } }

.skip-link {
  position: absolute; left: 16px; top: -100px; z-index: 100;
  background: var(--color-primary); color: var(--color-on-primary);
  padding: 10px 16px; border-radius: var(--radius-sm); font-weight: 600;
}
.skip-link:focus { top: 12px; }

.icon { width: 20px; height: 20px; flex-shrink: 0; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.icon-lg { width: 26px; height: 26px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: 48px; padding: 12px 24px;
  border-radius: var(--radius-pill); border: 2px solid transparent;
  font-weight: 600; font-size: 1rem; line-height: 1;
  transition: background-color var(--dur-fast) ease, border-color var(--dur-fast) ease, color var(--dur-fast) ease, transform var(--dur-fast) ease, box-shadow var(--dur-fast) ease;
  touch-action: manipulation; white-space: nowrap;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--color-primary); color: var(--color-on-primary); box-shadow: 0 6px 18px rgba(8, 102, 255, .28); }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-accent { background: var(--color-accent); color: var(--color-on-accent); box-shadow: 0 6px 18px rgba(36, 135, 58, .28); }
.btn-accent:hover { background: var(--color-accent-hover); }
.btn-outline { background: transparent; border-color: var(--color-border-strong); color: var(--color-foreground); }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-soft); }
.btn-light { background: #fff; color: var(--color-primary); }
.btn-light:hover { background: var(--color-primary-soft); }
.btn .icon { transition: transform var(--dur-fast) ease; }
.btn:hover .icon-arrow { transform: translateX(3px); }

/* ---------- Section scaffolding ---------- */
.section { padding-block: var(--space-16); }
@media (min-width: 1024px) { .section { padding-block: var(--space-24); } }
.section-alt { background: var(--color-surface); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-heading); font-size: .8125rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--color-primary);
  background: var(--color-primary-soft); padding: 6px 14px; border-radius: var(--radius-pill);
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--color-accent); }

.section-head { max-width: 720px; margin-bottom: var(--space-12); }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head h2 { font-size: clamp(1.875rem, 3.6vw, 2.75rem); margin-top: var(--space-4); }
.section-head p { margin-top: var(--space-4); color: var(--color-muted-foreground); font-size: 1.0625rem; }
.text-gradient { background: linear-gradient(90deg, var(--color-primary), #0099FF); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: var(--z-header);
  background: rgba(11, 18, 32, .94); backdrop-filter: saturate(180%) blur(12px); -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid #24324A;
  transition: border-color var(--dur-med) ease, box-shadow var(--dur-med) ease;
}
.header.is-scrolled { box-shadow: 0 6px 20px rgba(11, 18, 32, .25); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 24px; max-width: 1320px; }
/* Brand wordmark */
.brand { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark { position: relative; display: block; width: 44px; height: 44px; border-radius: 13px; box-shadow: 0 6px 16px rgba(8, 102, 255, .32); transition: transform var(--dur-med) var(--ease-out); }
.brand-mark img { width: 100%; height: 100%; }
.brand:hover .brand-mark { transform: rotate(-6deg) scale(1.04); }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name { font-family: var(--font-heading); font-size: 1.375rem; font-weight: 700; letter-spacing: -0.03em; color: var(--color-foreground); }
.bn-with { margin-inline: 1px; font-weight: 500; font-style: italic; background: linear-gradient(90deg, var(--color-accent), #42B72A); -webkit-background-clip: text; background-clip: text; color: transparent; padding-right: 2px; }
.bn-kishore { background: linear-gradient(90deg, var(--color-primary), #0047C2); -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand-tagline { margin-top: 5px; font-size: .6875rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--color-muted-foreground); white-space: nowrap; }
.brand-tagline b { font-weight: 700; color: var(--color-accent-hover); }
.brand-sm .brand-mark { width: 38px; height: 38px; border-radius: 11px; }
.brand-sm .brand-name { font-size: 1.1875rem; }
.brand-sm .brand-tagline { font-size: .625rem; letter-spacing: .1em; }
.brand-light .brand-name { color: #fff; }
.brand-light .bn-kishore { background: linear-gradient(90deg, #7FB2FF, #B9D4FF); -webkit-background-clip: text; background-clip: text; }
.brand-light .brand-tagline { color: #B0B3B8; }
.brand-light .brand-tagline b { color: #7DD58F; }
@media (max-width: 374px) { .brand-name { font-size: 1.1875rem; } .brand-tagline { font-size: .625rem; letter-spacing: .08em; } }

.nav { display: none; }
.nav ul { display: flex; gap: 4px; }
.nav a {
  display: block; padding: 10px 14px; border-radius: var(--radius-pill);
  font-weight: 500; color: var(--color-muted-foreground);
  transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease;
}
.header .nav a { color: #B0B3B8; padding-inline: 10px; }
.header .nav a:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.header .nav a[aria-current] { color: #fff; font-weight: 600; }

.menu-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 12px;
  border: 1px solid var(--color-border-strong); background: #fff; color: var(--color-foreground);
}
.menu-toggle:hover { border-color: var(--color-primary); color: var(--color-primary); }
.header .menu-toggle { background: transparent; border-color: #3A4A66; color: #fff; }
.header .menu-toggle:hover { border-color: #4D9BFF; color: #4D9BFF; }

@media (min-width: 1024px) {
  .nav { display: flex; }
  .menu-toggle { display: none; }
}

/* Mobile menu */
.mobile-menu {
  position: fixed; inset: 0; z-index: var(--z-menu);
  background: rgba(28, 30, 33, .45);
  opacity: 0; visibility: hidden; transition: opacity var(--dur-med) ease, visibility var(--dur-med);
}
.mobile-menu.is-open { opacity: 1; visibility: visible; }
.mobile-menu-panel {
  position: absolute; top: 0; right: 0; height: 100%; width: min(340px, 88vw);
  background: #fff; padding: 20px; display: flex; flex-direction: column; gap: 8px;
  transform: translateX(100%); transition: transform var(--dur-med) var(--ease-out);
  overflow-y: auto;
}
.mobile-menu.is-open .mobile-menu-panel { transform: translateX(0); }
.mobile-menu-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.mobile-menu nav a { display: block; padding: 14px 12px; border-radius: 12px; font-weight: 500; font-size: 1.0625rem; }
.mobile-menu nav a:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.mobile-menu .btn { margin-top: 12px; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding-block: 56px 72px; background: radial-gradient(1000px 500px at 85% -10%, #E7F3FF 0%, transparent 60%), radial-gradient(700px 400px at -10% 110%, #E3F5E6 0%, transparent 60%), #fff; }
.hero-grid-bg { position: absolute; inset: 0; background-image: linear-gradient(var(--color-border) 1px, transparent 1px), linear-gradient(90deg, var(--color-border) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(ellipse at center, #000 20%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse at center, #000 20%, transparent 75%); opacity: .55; pointer-events: none; }
.hero .container { position: relative; }
.hero-copy { max-width: 860px; margin-inline: auto; text-align: center; }
@media (min-width: 1024px) { .hero { padding-block: 104px 120px; } }

.hero h1 { font-size: clamp(2.25rem, 5.4vw, 3.75rem); margin-top: 20px; }
.hero-lead { margin: 20px auto 0; font-size: 1.125rem; color: var(--color-muted-foreground); max-width: 640px; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 32px; }
.hero-trust { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 24px; margin-top: 32px; color: var(--color-muted-foreground); font-size: .9375rem; }
.hero-trust li { display: flex; align-items: center; gap: 8px; }
.hero-trust .icon { color: var(--color-success); width: 18px; height: 18px; }

/* ---------- About ---------- */
.about-grid { display: grid; gap: 48px; align-items: center; }
@media (min-width: 1024px) { .about-grid { grid-template-columns: 1fr 1fr; gap: 72px; } }
.about-media { position: relative; aspect-ratio: 5 / 4; border-radius: var(--radius-lg); overflow: hidden; background: linear-gradient(135deg, var(--color-primary) 0%, #0047C2 100%); display: grid; place-items: center; }
.about-media svg.network { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .35; }
.about-media .about-quote { position: relative; color: #fff; padding: 32px; max-width: 380px; text-align: center; }
.about-media .about-quote p { font-family: var(--font-heading); font-size: clamp(1.25rem, 2.4vw, 1.625rem); font-weight: 600; line-height: 1.3; }
.about-media .about-quote small { display: block; margin-top: 12px; opacity: .85; }
.about-copy h2 { font-size: clamp(1.875rem, 3.6vw, 2.75rem); margin-top: 16px; }
.about-copy p { margin-top: 16px; color: var(--color-muted-foreground); font-size: 1.0625rem; }
.check-list { display: grid; gap: 12px; margin-top: 24px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; }
.check-list .icon { color: var(--color-primary); margin-top: 3px; }
.about-copy .btn { margin-top: 32px; }

/* ---------- Cards / features ---------- */
.grid-3 { display: grid; gap: 20px; }
@media (min-width: 640px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .grid-3 { grid-template-columns: repeat(3, 1fr); gap: 24px; } }

.card {
  background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: 28px; transition: transform var(--dur-med) var(--ease-out), box-shadow var(--dur-med) ease, border-color var(--dur-med) ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-border-strong); }
.card-icon { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; background: var(--color-primary-soft); color: var(--color-primary); margin-bottom: 20px; }
.card:nth-child(3n+2) .card-icon { background: #EAF7EC; color: var(--color-accent); }
.card h3 { font-size: 1.25rem; }
.card p { margin-top: 10px; color: var(--color-muted-foreground); }

/* ---------- Courses ---------- */
.course-grid { display: grid; gap: 24px; }
@media (min-width: 900px) { .course-grid { grid-template-columns: 1fr 1fr; } }
.course {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  overflow: hidden; transition: box-shadow var(--dur-med) ease, transform var(--dur-med) var(--ease-out);
}
.course:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.course-head { padding: 28px 28px 24px; background: linear-gradient(135deg, var(--color-primary), #0047C2); color: #fff; }
.course.agentic .course-head { background: linear-gradient(135deg, #1D7030, var(--color-accent) 60%, #42B72A); }
.course-tag { display: inline-block; font-size: .75rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; background: rgba(255,255,255,.18); padding: 5px 12px; border-radius: var(--radius-pill); }
.course-head h3 { font-size: 1.625rem; margin-top: 14px; }
.course-head p { margin-top: 8px; opacity: .92; }
.course-body { padding: 24px 28px 28px; display: flex; flex-direction: column; flex: 1; }
.course-meta { display: flex; flex-wrap: wrap; gap: 8px 20px; color: var(--color-muted-foreground); font-size: .9375rem; padding-bottom: 20px; border-bottom: 1px dashed var(--color-border-strong); }
.course-meta span { display: inline-flex; align-items: center; gap: 6px; }
.course-meta .icon { width: 18px; height: 18px; color: var(--color-primary); }
.course .check-list { margin-top: 20px; margin-bottom: 28px; }
.course-actions { margin-top: auto; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; }
.course-syllabus-link { display: inline-flex; align-items: center; gap: 6px; min-height: 48px; font-weight: 600; color: var(--color-primary); }
.course-syllabus-link:hover { color: var(--color-primary-hover); text-decoration: underline; text-underline-offset: 4px; }
.course-syllabus-link .icon { transition: transform var(--dur-fast) ease; }
.course-syllabus-link:hover .icon-arrow { transform: translateX(3px); }

/* ---------- Highlights (tabs) ---------- */
.highlights { display: grid; gap: 32px; }
@media (min-width: 1024px) { .highlights { grid-template-columns: 340px 1fr; gap: 48px; align-items: start; } }
.tab-list { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; scrollbar-width: none; }
.tab-list::-webkit-scrollbar { display: none; }
@media (min-width: 1024px) { .tab-list { flex-direction: column; overflow: visible; } }
.tab {
  display: flex; align-items: center; gap: 12px; text-align: left;
  min-height: 52px; padding: 12px 16px; border-radius: 14px; flex-shrink: 0;
  border: 1px solid var(--color-border); background: #fff; color: var(--color-muted-foreground); font-weight: 600;
  transition: all var(--dur-fast) ease;
}
.tab:hover { border-color: var(--color-border-strong); color: var(--color-foreground); }
.tab[aria-selected="true"] { background: var(--color-primary); border-color: var(--color-primary); color: #fff; box-shadow: 0 8px 20px rgba(8, 102, 255, .25); }
.tab-num { font-family: var(--font-heading); font-size: .875rem; opacity: .7; }
.tab-panel { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 32px; animation: fadeUp var(--dur-med) var(--ease-out); }
.tab-panel[hidden] { display: none; }
.tab-panel h3 { font-size: 1.5rem; }
.tab-panel p { margin-top: 12px; color: var(--color-muted-foreground); font-size: 1.0625rem; }
.tab-panel .chips { margin-top: 24px; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: var(--radius-pill); background: var(--color-primary-soft); color: var(--color-primary-hover); font-weight: 500; font-size: .9375rem; }

/* ---------- Instructor ---------- */
.instructor { display: grid; gap: 40px; align-items: center; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 28px; }
@media (min-width: 900px) { .instructor { grid-template-columns: 320px 1fr; padding: 48px; gap: 56px; } }
.instructor-photo { aspect-ratio: 1; border-radius: var(--radius-lg); background: linear-gradient(160deg, var(--color-primary-soft), #E3F5E6); display: grid; place-items: center; overflow: hidden; max-width: 320px; width: 100%; margin-inline: auto; }
.instructor-photo .initials { font-family: var(--font-heading); font-size: 5rem; font-weight: 700; color: var(--color-primary); }
.instructor h2 { font-size: clamp(1.75rem, 3.2vw, 2.5rem); margin-top: 16px; }
.instructor .role { color: var(--color-accent-hover); font-weight: 600; margin-top: 6px; }
.instructor p.bio { margin-top: 16px; color: var(--color-muted-foreground); font-size: 1.0625rem; }
.instructor .chips { margin-top: 24px; }

/* ---------- Careers ---------- */
.roles { display: grid; gap: 16px; }
@media (min-width: 640px) { .roles { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .roles { grid-template-columns: repeat(4, 1fr); } }
.role-card { display: flex; align-items: center; gap: 14px; padding: 18px 20px; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); font-weight: 600; transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease; }
.role-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
.role-card .card-icon { width: 44px; height: 44px; margin: 0; border-radius: 12px; }

/* ---------- Testimonials ---------- */
.quote-card { display: flex; flex-direction: column; }
.stars { display: flex; gap: 2px; color: #F59E0B; margin-bottom: 16px; }
.stars .icon { width: 18px; height: 18px; fill: currentColor; stroke: none; }
.quote-card blockquote { margin: 0; color: var(--color-foreground); font-size: 1.0625rem; flex: 1; }
.quote-author { display: flex; align-items: center; gap: 12px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--color-border); }
.avatar { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; font-family: var(--font-heading); font-weight: 700; color: #fff; background: var(--color-primary); flex-shrink: 0; }
.quote-card:nth-child(2) .avatar { background: var(--color-accent); }
.quote-card:nth-child(3) .avatar { background: #344854; }
.quote-author strong { display: block; }
.quote-author small { color: var(--color-muted-foreground); }

/* ---------- Stats ---------- */
.stats { background: var(--color-foreground); color: #fff; border-radius: var(--radius-lg); padding: 40px 24px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px 16px; text-align: center; position: relative; overflow: hidden; }
.stats::before { content: ""; position: absolute; inset: 0; background: radial-gradient(600px 200px at 20% 0%, rgba(24, 119, 242, .35), transparent 70%), radial-gradient(500px 200px at 90% 100%, rgba(36, 135, 58, .25), transparent 70%); pointer-events: none; }
@media (min-width: 900px) { .stats { grid-template-columns: repeat(4, 1fr); padding: 56px 40px; } }
.stat { position: relative; }
.stat-value { font-family: var(--font-heading); font-size: clamp(2.25rem, 4.5vw, 3.25rem); font-weight: 700; line-height: 1; font-variant-numeric: tabular-nums; }
.stat-value span.suffix { color: #7DD58F; }
.stat-label { margin-top: 10px; color: #B0B3B8; font-size: .9375rem; }

/* ---------- CTA + Contact ---------- */
.cta-wrap { display: grid; gap: 40px; align-items: start; }
@media (min-width: 1024px) { .cta-wrap { grid-template-columns: 1fr 1fr; gap: 64px; } }
.cta-copy h2 { font-size: clamp(1.875rem, 3.6vw, 2.75rem); margin-top: 16px; }
.cta-copy p { margin-top: 16px; color: var(--color-muted-foreground); font-size: 1.0625rem; }
.contact-list { display: grid; gap: 14px; margin-top: 28px; }
.contact-list a, .contact-list div { display: flex; align-items: center; gap: 14px; font-weight: 500; }
.contact-list .card-icon { width: 44px; height: 44px; margin: 0; border-radius: 12px; }
.contact-list a:hover { color: var(--color-primary); }

.form { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow-md); display: grid; gap: 18px; }
@media (min-width: 640px) { .form { padding: 36px; } .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; } }
.form-row { display: grid; gap: 18px; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; font-size: .9375rem; }
.field label .req { color: var(--color-error); }
.field input, .field select, .field textarea {
  width: 100%; min-height: 48px; padding: 12px 14px; font: inherit; font-size: 1rem; color: var(--color-foreground);
  background: var(--color-surface); border: 1.5px solid var(--color-border-strong); border-radius: 12px;
  transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease, background-color var(--dur-fast) ease;
}
.field textarea { min-height: 110px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--color-primary); background: #fff; box-shadow: 0 0 0 4px var(--color-primary-soft); }
.field.has-error input, .field.has-error select { border-color: var(--color-error); }
.field-error { color: var(--color-error); font-size: .875rem; display: none; }
.field.has-error .field-error { display: block; }
.form .btn { width: 100%; }
.form-note { font-size: .875rem; color: var(--color-muted-foreground); text-align: center; }
.form-success { display: none; align-items: center; gap: 10px; padding: 14px 16px; border-radius: 12px; background: #DCFCE7; color: var(--color-success); font-weight: 600; }
.form-success.is-visible { display: flex; }
.form-fail { display: none; padding: 14px 16px; border-radius: 12px; background: #FDECEC; color: #8A1C1C; font-weight: 500; }
.form-fail.is-visible { display: block; }
.form-fail a { text-decoration: underline; text-underline-offset: 3px; font-weight: 600; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.btn[disabled] { opacity: .6; cursor: progress; }

/* ---------- Footer ---------- */
.footer { background: var(--color-foreground); color: #B0B3B8; padding-top: 64px; }
.footer-grid { display: grid; gap: 40px; padding-bottom: 48px; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 1.6fr 1fr 1fr; } }
.footer-brand p { margin-top: 16px; max-width: 380px; }
.footer h4 { color: #fff; font-size: 1.0625rem; margin-bottom: 16px; }
.footer li + li { margin-top: 6px; }
.footer a { display: inline-flex; align-items: center; gap: 8px; padding-block: 4px; transition: color var(--dur-fast) ease; }
.footer a:hover { color: #fff; }
.footer .icon { width: 18px; height: 18px; }
.footer-social { display: flex; gap: 8px; margin-top: 20px; }
.footer-social a { width: 44px; height: 44px; justify-content: center; border-radius: 50%; background: rgba(255,255,255,.08); padding: 0; }
.footer-social a:hover { background: var(--color-primary); }
.footer-bottom { border-top: 1px solid rgba(176, 179, 184, .15); padding-block: 20px; font-size: .875rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }

/* ==========================================================
   Syllabus page
   ========================================================== */
.btn-sm { min-height: 44px; padding: 10px 16px; font-size: .9375rem; }
.btn-sm .icon { width: 18px; height: 18px; }

/* Syllabus hero: dark immersive (D1) */
.page-hero { position: relative; overflow: hidden; padding-block: 72px 56px; color: #fff;
  background: radial-gradient(700px 320px at 85% -10%, rgba(8, 102, 255, .35), transparent 70%),
              radial-gradient(500px 260px at 0% 110%, rgba(66, 183, 42, .16), transparent 70%), #0B1220; }
.page-hero .hero-grid-bg { background-image: linear-gradient(rgba(127, 178, 255, .10) 1px, transparent 1px), linear-gradient(90deg, rgba(127, 178, 255, .10) 1px, transparent 1px); opacity: 1; }
.page-hero .container { position: relative; }
.page-hero h1 { font-size: clamp(2rem, 4.6vw, 3.25rem); margin-top: 16px; max-width: 820px; color: #fff; }
.page-hero .text-gradient { background: linear-gradient(90deg, #4D9BFF, #7FD1FF); -webkit-background-clip: text; background-clip: text; color: transparent; }
.page-hero .eyebrow { background: rgba(77, 155, 255, .14); color: #7FB2FF; }
.page-hero .breadcrumb ol { color: #9AA7BD; }
.page-hero .breadcrumb a { color: #7FB2FF; }
.page-hero .breadcrumb li + li::before { color: #3A4A66; }
.page-hero .breadcrumb [aria-current] { color: #E4E6EB; }
@media (min-width: 1024px) { .page-hero { padding-block: 112px 80px; } }

.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0 0 20px; padding: 0; font-size: .9375rem; color: var(--color-muted-foreground); }
.breadcrumb li + li::before { content: "/"; margin-right: 6px; color: var(--color-border-strong); }
.breadcrumb a { color: var(--color-primary); font-weight: 500; }
.breadcrumb a:hover { text-decoration: underline; text-underline-offset: 3px; }
.breadcrumb [aria-current] { color: var(--color-foreground); font-weight: 500; }

.syl-strip { list-style: none; margin: 28px 0 0; padding: 0; max-width: 760px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px; background: #24324A; border: 1px solid #24324A; border-radius: var(--radius-md); overflow: hidden; }
@media (min-width: 640px) { .syl-strip { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.syl-strip li { background: #0F1A2E; padding: 16px 18px; }
.syl-strip strong { display: block; font-family: var(--font-heading); font-size: 2rem; line-height: 1; font-variant-numeric: tabular-nums; }
.syl-strip span { display: block; margin-top: 6px; font-size: .875rem; color: #9AA7BD; }
.st-blue strong { color: #4D9BFF; }
.st-green strong { color: #5FD08A; }
.st-amber strong { color: #F6C35B; }
.st-purple strong { color: #B9A8FF; }

.syllabus-section { padding-top: 40px; }
.syllabus-layout { display: grid; gap: 32px; }
@media (min-width: 1024px) { .syllabus-layout { grid-template-columns: 260px 1fr; gap: 48px; align-items: start; } }

/* Side panel */
.syl-aside-inner { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 20px; }
@media (min-width: 1024px) { .syl-aside { position: sticky; top: calc(var(--header-h) + 24px); } }
.syl-aside-title { font-family: var(--font-heading); font-weight: 600; font-size: .8125rem; letter-spacing: .12em; text-transform: uppercase; color: var(--color-muted-foreground); margin-bottom: 8px; }
.syl-aside-cta { width: 100%; margin-top: 12px; }
@media (max-width: 1023px) { .syl-aside-cta { display: none; } }

/* Syllabus explorer (file-browser style) */
.fx { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); min-width: 0; overflow: hidden; }
.fx-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; padding: 14px 16px; background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.fx-bar-title { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-heading); font-size: 1.0625rem; }
.fx-bar-title .icon { color: var(--color-primary); }
.fx-bar-meta { color: var(--color-muted-foreground); font-size: .875rem; }
.fx-actions { display: flex; gap: 8px; margin-left: auto; }
@media (max-width: 639px) { .fx-actions { margin-left: 0; width: 100%; } .fx-actions .btn { flex: 1; } }

.fx-root, .fx-children { list-style: none; margin: 0; padding: 0; }
.fx-root { padding: 12px; display: grid; gap: 10px; }
.fx-item { --fx-bg: #E7F3FF; --fx-line: #B5D4F4; --fx-ink: #0C447C; --fx-ink2: #185FA5;
  background: var(--fx-bg); border: 1px solid var(--fx-line); border-radius: 12px; }
.fx-item:nth-child(9n+2), .rail li:nth-child(9n+2) { --fx-bg: #FDF3D8; --fx-line: #FAC775; --fx-ink: #633806; --fx-ink2: #854F0B; }
.fx-item:nth-child(9n+3), .rail li:nth-child(9n+3) { --fx-bg: #EAF7EC; --fx-line: #C0DD97; --fx-ink: #27500A; --fx-ink2: #3B6D11; }
.fx-item:nth-child(9n+4), .rail li:nth-child(9n+4) { --fx-bg: #EEEDFE; --fx-line: #CECBF6; --fx-ink: #3C3489; --fx-ink2: #534AB7; }
.fx-item:nth-child(9n+5), .rail li:nth-child(9n+5) { --fx-bg: #E1F5EE; --fx-line: #9FE1CB; --fx-ink: #085041; --fx-ink2: #0F6E56; }
.fx-item:nth-child(9n+6), .rail li:nth-child(9n+6) { --fx-bg: #FAECE7; --fx-line: #F5C4B3; --fx-ink: #712B13; --fx-ink2: #993C1D; }
.fx-item:nth-child(9n+7), .rail li:nth-child(9n+7) { --fx-bg: #FBEAF0; --fx-line: #F4C0D1; --fx-ink: #72243E; --fx-ink2: #993556; }
.fx-item:nth-child(9n+8), .rail li:nth-child(9n+8) { --fx-bg: #E0F4FA; --fx-line: #A8DCEC; --fx-ink: #0B4F63; --fx-ink2: #136B85; }
.fx-item:nth-child(9n+9), .rail li:nth-child(9n+9) { --fx-bg: #EEF1F4; --fx-line: #CBD3DA; --fx-ink: #283A44; --fx-ink2: #4B5D68; }
.fx-item { scroll-margin-top: calc(var(--header-h) + 16px); }

.fx-row { display: flex; align-items: center; gap: 10px; padding: 6px 10px; border-radius: 8px; min-width: 0; }
.fx-ic { width: 20px; height: 20px; flex-shrink: 0; }
.fx-name { min-width: 0; overflow-wrap: anywhere; }

/* Module folders (clickable) */
.fx-module > summary { list-style: none; cursor: pointer; min-height: 52px; flex-wrap: wrap; row-gap: 2px; transition: background-color var(--dur-fast) ease; }
.fx-module > summary::-webkit-details-marker { display: none; }
.fx-module > summary { padding: 10px 12px; border-radius: 12px; }
.fx-module > summary:hover { background: rgba(255, 255, 255, .45); }
.fx-module > summary:focus-visible { outline-offset: -3px; }
.fx-chev { width: 18px; height: 18px; color: var(--fx-ink2); transform: rotate(-90deg); transition: transform var(--dur-med) var(--ease-out); }
.fx-module[open] > summary .fx-chev { transform: rotate(0deg); color: var(--fx-ink); }
.fx-icobox { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: #fff; flex-shrink: 0; }
.fx-folder .fx-ic { color: var(--fx-ink2); fill: var(--fx-bg); }
.fx-folder .fx-open { display: none; }
.fx-module[open] > summary .fx-open { display: block; }
.fx-module[open] > summary .fx-closed { display: none; }
.fx-folder .fx-name { font-family: var(--font-heading); font-weight: 600; font-size: 1.0625rem; flex: 1 1 220px; color: var(--fx-ink); }
.fx-num { display: inline-block; min-width: 2.2ch; margin-right: 8px; color: var(--fx-ink2); font-variant-numeric: tabular-nums; }
.fx-meta { color: var(--fx-ink2); font-size: .8125rem; font-weight: 500; margin-left: auto; white-space: nowrap; }
@media (max-width: 639px) { .fx-meta { order: 3; flex-basis: 100%; margin-left: 50px; white-space: normal; } }

/* Tree guide lines */
.fx-module > .fx-children { margin: 0 10px 10px; padding: 8px 12px 10px; background: #fff; border-radius: 10px; border: 1px solid var(--fx-line); animation: fadeUp var(--dur-med) var(--ease-out); }
.fx-sub > .fx-children { margin-left: 19px; padding-left: 14px; border-left: 1px dashed var(--color-border-strong); }

.fx-subfolder { font-weight: 600; padding-top: 8px; }
.fx-subfolder .fx-ic { color: #E8A317; fill: #FDF3D8; }   /* classic folder yellow for sub-folders */
.fx-file { color: var(--color-muted-foreground); font-size: .9375rem; padding-block: 4px; }
.fx-file .fx-ic { width: 18px; height: 18px; color: var(--color-border-strong); }
.fx-file:hover { background: var(--color-surface); color: var(--color-foreground); }
.fx-file:hover .fx-ic { color: var(--color-primary); }

/* Project entries */
.fx-project { margin: 6px 0; }
.fx-project .fx-row { align-items: flex-start; padding: 10px 12px; background: var(--color-accent-soft); border: 1px dashed #8FD19E; }
.fx-project .fx-ic { color: var(--color-accent); margin-top: 2px; }
.fx-project .fx-name { font-weight: 600; }
.fx-project small { display: block; font-weight: 400; color: #4B4F56; font-size: .875rem; margin-top: 2px; }
.fx-tag { display: inline-block; margin-right: 8px; padding: 1px 8px; border-radius: var(--radius-pill); background: var(--color-accent); color: #fff; font-size: .6875rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; vertical-align: 2px; }

@media (max-width: 639px) {
  .fx-root { padding: 8px; gap: 8px; }
  .fx-module > .fx-children { margin: 0 6px 6px; padding: 6px 8px 8px; }
  .fx-sub > .fx-children { margin-left: 12px; padding-left: 10px; }
}

/* Side panel jump list numbers */
@media (max-width: 1023px) { .syl-aside { display: none; } }

/* Jump-to-module progress rail (each item matches its folder colour) */
.rail-progress { margin: 4px 0 14px; }
.rail-progress-label { display: flex; justify-content: space-between; font-size: .75rem; color: var(--color-muted-foreground); margin-bottom: 6px; }
.rail-progress-label span:last-child { font-weight: 600; color: var(--color-primary); font-variant-numeric: tabular-nums; }
.rail-progress-track { height: 4px; border-radius: 4px; background: var(--color-surface); overflow: hidden; }
.rail-progress-track span { display: block; height: 100%; width: 0; border-radius: 4px; background: var(--color-primary); transition: width var(--dur-med) var(--ease-out); }
.rail { list-style: none; margin: 0; padding: 0 0 0 22px; position: relative; display: grid; gap: 5px; }
.rail::before { content: ""; position: absolute; left: 7px; top: 14px; bottom: 14px; width: 2px; background: var(--color-border); }
.rail li { --fx-bg: #E7F3FF; --fx-line: #B5D4F4; --fx-ink: #0C447C; --fx-ink2: #185FA5; position: relative; }
.rail-link { display: flex; align-items: center; gap: 8px; min-height: 38px; padding: 7px 10px; border-radius: 10px;
  background: var(--fx-bg); border: 1px solid var(--fx-line); color: var(--fx-ink); font-size: .875rem; font-weight: 500;
  transition: transform var(--dur-fast) ease, box-shadow var(--dur-fast) ease; }
.rail-link:hover { transform: translateX(2px); box-shadow: var(--shadow-sm); }
.rail-link::before { content: ""; position: absolute; left: -20px; width: 10px; height: 10px; border-radius: 50%; background: #fff; border: 2px solid var(--color-border-strong); transition: all var(--dur-fast) ease; }
.rail-num { font-size: .75rem; font-weight: 700; color: var(--fx-ink2); font-variant-numeric: tabular-nums; }
.rail-name { min-width: 0; overflow-wrap: anywhere; }
.rail li.is-done .rail-link::before { background: var(--color-primary); border-color: var(--color-primary); }
.rail li.is-active .rail-link { border-width: 2px; border-color: var(--fx-ink2); padding: 6px 9px; box-shadow: var(--shadow-sm); }
.rail li.is-active .rail-link::before { background: #fff; border-color: var(--fx-ink2); box-shadow: 0 0 0 4px var(--fx-bg); }



/* ==========================================================
   Why LearnWithKishore page
   ========================================================== */
.why-lead { margin-top: 14px; max-width: 640px; color: #C9D3E3; font-size: 1.0625rem; }
.why-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn-ghost-light { background: transparent; border-color: #3A4A66; color: #E4E6EB; }
.btn-ghost-light:hover { border-color: #4D9BFF; color: #fff; background: rgba(77, 155, 255, .12); }

/* four core reasons */
.why-reasons { display: grid; gap: 16px; }
@media (min-width: 640px) { .why-reasons { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .why-reasons { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; } }
.why-card { --w-bg: #E7F3FF; --w-line: #B5D4F4; --w-ink: #0C447C; --w-ink2: #185FA5;
  background: var(--w-bg); border: 1px solid var(--w-line); border-radius: var(--radius-md); padding: 24px;
  transition: transform var(--dur-med) var(--ease-out), box-shadow var(--dur-med) ease; }
.why-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.wc-green  { --w-bg: #EAF7EC; --w-line: #C0DD97; --w-ink: #27500A; --w-ink2: #3B6D11; }
.wc-amber  { --w-bg: #FDF3D8; --w-line: #FAC775; --w-ink: #633806; --w-ink2: #854F0B; }
.wc-purple { --w-bg: #EEEDFE; --w-line: #CECBF6; --w-ink: #3C3489; --w-ink2: #534AB7; }
.why-ic { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; background: #fff; color: var(--w-ink2); margin-bottom: 18px; }
.why-card h3 { font-size: 1.1875rem; color: var(--w-ink); }
.why-card p { margin-top: 8px; color: var(--w-ink2); }

/* more reasons */
.why-extras { display: grid; gap: 16px; }
@media (min-width: 640px) { .why-extras { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .why-extras { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; } }
.why-extra { display: flex; gap: 14px; align-items: flex-start; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 20px; }
.why-xic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; flex-shrink: 0; background: var(--color-primary-soft); color: var(--color-primary); }
.why-extra h3 { font-size: 1.0625rem; }
.why-extra p { margin-top: 4px; color: var(--color-muted-foreground); font-size: .9375rem; }

/* journey steps */
.journey { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; counter-reset: none; }
@media (min-width: 768px) { .journey { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; } }
.journey li { position: relative; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 22px 20px; }
.journey-num { display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: var(--color-primary); color: #fff; font-family: var(--font-heading); font-weight: 700; margin-bottom: 14px; }
.journey li:last-child .journey-num { background: var(--color-accent); }
.journey h3 { font-size: 1.0625rem; }
.journey p { margin-top: 6px; color: var(--color-muted-foreground); font-size: .9375rem; }
@media (min-width: 768px) {
  .journey li:not(:last-child)::after { content: ""; position: absolute; top: 40px; right: -20px; width: 20px; border-top: 2px dashed var(--color-border-strong); }
}

/* FAQ accordion */
.why-faq-wrap { max-width: 860px; }
.faq { display: grid; gap: 10px; }
.faq details { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease; }
.faq details[open] { border-color: var(--color-border-strong); box-shadow: var(--shadow-sm); }
.faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 56px; padding: 14px 20px; cursor: pointer; list-style: none; font-weight: 600; font-size: 1.0625rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--color-primary); }
.faq-chev { flex-shrink: 0; color: var(--color-muted-foreground); transition: transform var(--dur-med) var(--ease-out); }
.faq details[open] .faq-chev { transform: rotate(180deg); color: var(--color-primary); }
.faq details p { padding: 0 20px 18px; color: var(--color-muted-foreground); }
.faq details p a { color: var(--color-primary); font-weight: 600; }

/* closing call to action */
.why-cta { display: grid; gap: 24px; align-items: center; padding: 32px 24px; border-radius: var(--radius-lg); color: #fff;
  background: radial-gradient(500px 220px at 90% 0%, rgba(8, 102, 255, .45), transparent 70%), #0B1220; }
.why-cta h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
.why-cta p { margin-top: 8px; color: #C9D3E3; font-size: 1.0625rem; max-width: 560px; }
@media (min-width: 900px) { .why-cta { grid-template-columns: 1fr auto; padding: 48px; } }

@media print {
  .header, .mobile-menu, .syl-aside, .footer, .to-top { display: none !important; }
}

/* ---------- Back to top ---------- */
.to-top { position: fixed; right: 16px; bottom: 16px; z-index: 30; width: 48px; height: 48px; border-radius: 50%; border: none; background: var(--color-primary); color: #fff; display: grid; place-items: center; box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(8px); transition: all var(--dur-med) var(--ease-out); }
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--color-primary-hover); }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out); }
.reveal.is-in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}