/* ============================================================
   Coding with Niko — redesign
   Palette: deep navy canvas, electric blue + warm yellow accents
   ============================================================ */

:root {
  --bg:        #0b1120;
  --bg-2:      #0f1830;
  --surface:   #131d36;
  --surface-2: #1a2542;
  --line:      rgba(255, 255, 255, 0.08);
  --line-2:    rgba(255, 255, 255, 0.14);

  --text:      #e8edf7;
  --muted:     #9aa7c2;
  --muted-2:   #6f7d9c;

  --blue:      #3b82f6;
  --blue-2:    #60a5fa;
  --yellow:    #ffd145;
  --yellow-2:  #ffdf7a;

  --grad: linear-gradient(135deg, var(--blue-2), var(--yellow));

  --radius:    18px;
  --radius-sm: 12px;
  --shadow:    0 24px 60px -20px rgba(0, 0, 0, 0.6);
  --maxw:      1180px;
  --ease:      cubic-bezier(.2, .7, .2, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 92px; }

/* Keyboard focus visibility */
:focus-visible { outline: 2px solid var(--blue-2); outline-offset: 3px; border-radius: 6px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, .brand__text { font-family: "Sora", sans-serif; line-height: 1.1; }

a { color: inherit; text-decoration: none; }

/* ░░ Background decoration ░░ */
.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
          mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  opacity: .5;
}
.bg-glow {
  position: fixed; z-index: -2; border-radius: 50%;
  filter: blur(120px); opacity: .35; pointer-events: none;
}
.bg-glow--blue   { width: 560px; height: 560px; top: -180px; left: -120px; background: var(--blue); }
.bg-glow--yellow { width: 480px; height: 480px; top: 240px; right: -160px; background: var(--yellow); opacity: .22; }

/* ░░ Buttons ░░ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: "Sora", sans-serif; font-weight: 600; font-size: .95rem;
  padding: .7rem 1.25rem; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s, border-color .2s;
  white-space: nowrap;
}
.btn--primary {
  background: var(--grad); color: #0b1120;
  box-shadow: 0 10px 30px -10px rgba(255, 209, 69, .5);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -10px rgba(255, 209, 69, .6); }
.btn--ghost {
  background: rgba(255, 255, 255, .03); color: var(--text); border-color: var(--line-2);
}
.btn--ghost:hover { background: rgba(255, 255, 255, .08); transform: translateY(-2px); }
.btn--lg    { padding: .95rem 1.7rem; font-size: 1.02rem; }
.btn--block { width: 100%; margin-top: auto; }

/* ░░ Header / nav ░░ */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 2rem;
  max-width: var(--maxw); margin: 0 auto; padding: 1rem 1.5rem;
  backdrop-filter: blur(12px);
}
.nav::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: rgba(11, 17, 32, .6); border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: .55rem; font-weight: 700; }
.brand__logo { height: 42px; width: auto; display: block; transition: transform .2s var(--ease); }
.brand:hover .brand__logo { transform: scale(1.04); }

.nav__menu { display: contents; }
.nav__links { display: flex; gap: 1.5rem; margin-left: auto; font-size: .95rem; }
.nav__links a { color: var(--muted); transition: color .2s; position: relative; }
.nav__links a:hover { color: var(--text); }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0;
  background: var(--grad); transition: width .25s var(--ease);
}
.nav__links a:hover::after { width: 100%; }

.nav__actions { display: flex; gap: .6rem; }

.nav__burger {
  display: none; flex-direction: column; gap: 5px; background: none; border: 0;
  cursor: pointer; padding: 6px; margin-left: auto;
}
.nav__burger span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: .25s var(--ease); }
.nav__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ░░ Shared layout ░░ */
.section {
  max-width: var(--maxw); margin: 0 auto; padding: 5.5rem 1.5rem;
}
.section__head { max-width: 620px; margin-bottom: 3rem; }
.section__head h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; margin: .6rem 0 .8rem; }
.section__sub { color: var(--muted); font-size: 1.05rem; }

.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: .8rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  color: var(--muted); font-family: "JetBrains Mono", monospace;
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--yellow); box-shadow: 0 0 0 4px rgba(255, 209, 69,.18); }
.eyebrow--alt { color: var(--blue-2); }

.grad {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.muted { color: var(--muted); }
.lead { font-size: 1.12rem; color: var(--muted); }

/* ░░ Hero ░░ */
.hero {
  max-width: var(--maxw); margin: 0 auto;
  padding: 4.5rem 1.5rem 3rem;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 3rem; align-items: center;
}
.hero h1 {
  font-size: clamp(2.4rem, 5.2vw, 4rem); font-weight: 800; letter-spacing: -.02em;
  margin: 1.1rem 0 1.2rem;
}
.hero .lead { max-width: 48ch; }
.hero__cta { display: flex; gap: .8rem; margin: 1.8rem 0 2.4rem; flex-wrap: wrap; }

.hero__stats { display: flex; gap: 2.4rem; flex-wrap: wrap; }
.stat strong {
  display: block; font-family: "Sora", sans-serif; font-size: 1.9rem; font-weight: 800;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.stat span { font-size: .85rem; color: var(--muted-2); max-width: 16ch; display: block; }

/* code card */
.hero__visual { position: relative; }
.code-card {
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--line-2); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
}
.code-card__bar {
  display: flex; align-items: center; gap: .5rem;
  padding: .8rem 1rem; border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.02);
}
.tdot { width: 12px; height: 12px; border-radius: 50%; }
.tdot--r { background: #ff5f57; } .tdot--y { background: #febc2e; } .tdot--g { background: #28c840; }
.code-card__file {
  margin-left: auto; font-family: "JetBrains Mono", monospace; font-size: .8rem; color: var(--muted-2);
}
.code-card__body {
  padding: 1.4rem 1.5rem; font-family: "JetBrains Mono", monospace;
  font-size: .92rem; line-height: 1.9; overflow-x: auto;
}
.c-key { color: #c084fc; } .c-fn { color: var(--blue-2); } .c-var { color: var(--yellow-2); }
.c-prop { color: #7dd3fc; } .c-str { color: #86efac; } .c-num { color: #fca5a5; } .c-com { color: var(--muted-2); font-style: italic; }

.float-chip {
  position: absolute; font-family: "JetBrains Mono", monospace; font-weight: 600; font-size: .85rem;
  padding: .45rem .8rem; border-radius: 10px; border: 1px solid var(--line-2);
  background: rgba(19,29,54,.9); backdrop-filter: blur(6px);
  box-shadow: var(--shadow); animation: float 5s ease-in-out infinite;
}
.float-chip--1 { top: -18px; right: 28px; color: var(--yellow-2); animation-delay: 0s; }
.float-chip--2 { bottom: 60px; left: -22px; color: var(--blue-2); animation-delay: 1.2s; }
.float-chip--3 { bottom: -16px; right: 60px; color: #86efac; animation-delay: 2.2s; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* ░░ Trust strip ░░ */
.trust { max-width: var(--maxw); margin: 0 auto; padding: 2rem 1.5rem 1rem; text-align: center; }
.trust__label {
  font-family: "JetBrains Mono", monospace; font-size: .78rem; letter-spacing: .05em;
  text-transform: uppercase; color: var(--muted-2); margin-bottom: 1.2rem;
}
.trust__logos {
  list-style: none; display: flex; flex-wrap: wrap; justify-content: center;
  gap: 1rem 2.6rem; align-items: center;
}
.trust__logos li {
  font-family: "Sora", sans-serif; font-weight: 700; font-size: 1.15rem;
  color: var(--muted-2); opacity: .7; transition: opacity .2s, color .2s; letter-spacing: -.01em;
}
.trust__logos li:hover { opacity: 1; color: var(--text); }

/* ░░ Cards grid ░░ */
.cards { display: grid; gap: 1.4rem; }
.cards--3 { grid-template-columns: repeat(3, 1fr); }

/* video cards */
.vcard {
  display: flex; flex-direction: column; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  transition: transform .25s var(--ease), border-color .25s, box-shadow .25s;
}
.vcard:hover { transform: translateY(-6px); border-color: var(--line-2); box-shadow: var(--shadow); }
.vcard__thumb {
  position: relative; aspect-ratio: 16/9; display: grid; place-items: center;
  background: #0b1120; overflow: hidden;
}
.vcard__thumb img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; transition: transform .4s var(--ease);
}
.vcard:hover .vcard__thumb img { transform: scale(1.05); }
.vcard__thumb::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,17,32,0) 40%, rgba(11,17,32,.55));
}
.vcard__play, .vcard__tag { position: relative; z-index: 1; }
.vcard__play {
  width: 54px; height: 54px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25);
  color: #fff; font-size: 1rem; backdrop-filter: blur(4px); transition: transform .25s var(--ease);
}
.vcard:hover .vcard__play { transform: scale(1.12); background: var(--grad); color: #0b1120; }
.vcard__tag {
  position: absolute; top: .8rem; left: .8rem; font-size: .72rem; font-weight: 600;
  font-family: "JetBrains Mono", monospace; padding: .25rem .6rem; border-radius: 999px;
  background: rgba(11,17,32,.7); border: 1px solid var(--line-2); color: var(--muted);
}
.vcard__body { padding: 1.2rem 1.3rem 1.4rem; }
.vcard__body h3 { font-size: 1.08rem; font-weight: 700; margin-bottom: .5rem; }
.vcard__body p { color: var(--muted); font-size: .92rem; }

/* course cards */
.course {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem; transition: transform .25s var(--ease), border-color .25s, box-shadow .25s;
}
.course:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.course--featured {
  border-color: rgba(255, 209, 69,.4);
  background:
    radial-gradient(140% 120% at 100% 0%, rgba(255, 209, 69,.14), transparent 55%),
    var(--surface);
}
.course--soon { opacity: .96; }
.course__top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.badge {
  font-family: "JetBrains Mono", monospace; font-size: .72rem; font-weight: 600;
  padding: .3rem .7rem; border-radius: 999px; text-transform: uppercase; letter-spacing: .04em;
}
.badge--live { background: rgba(255, 209, 69,.16); color: var(--yellow-2); border: 1px solid rgba(255, 209, 69,.4); }
.badge--soon { background: rgba(59,130,246,.14); color: var(--blue-2); border: 1px solid rgba(59,130,246,.35); }
.course__price { font-family: "Sora", sans-serif; font-weight: 800; font-size: 1.4rem; color: var(--yellow-2); }
.course__icon {
  font-family: "JetBrains Mono", monospace; font-weight: 700; font-size: .95rem;
  padding: .35rem .55rem; border-radius: 8px; background: rgba(59,130,246,.16); color: var(--blue-2);
}
.course__icon--css { background: rgba(96,165,250,.14); color: #93c5fd; }
.course h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: .6rem; }
.course > p { color: var(--muted); font-size: .95rem; margin-bottom: 1.1rem; }
.course__list { list-style: none; margin-bottom: 1.4rem; display: grid; gap: .55rem; }
.course__list li { position: relative; padding-left: 1.5rem; color: var(--muted); font-size: .9rem; }
.course__list li::before {
  content: "✓"; position: absolute; left: 0; top: 0; color: var(--yellow-2); font-weight: 700;
}

/* ░░ About ░░ */
.about { display: grid; grid-template-columns: 1fr 1.1fr; gap: 3.5rem; align-items: start; }
.about__intro { display: grid; grid-template-columns: 200px 1fr; gap: 1.8rem; align-items: start; }
.about__photo { position: relative; margin: 0; }
.about__photo img {
  width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: var(--radius);
  border: 1px solid var(--line-2); box-shadow: var(--shadow);
}
.about__photo::before {
  content: ""; position: absolute; inset: -10px -10px auto auto; width: 70%; height: 70%;
  background: var(--grad); filter: blur(40px); opacity: .25; border-radius: var(--radius); z-index: -1;
}
.about__photo figcaption {
  margin-top: .7rem; text-align: center; font-family: "JetBrains Mono", monospace;
  font-size: .78rem; color: var(--muted-2);
}
.about__intro h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; margin: .6rem 0 1rem; }
.about__intro .lead { margin-bottom: 1rem; color: var(--text); }
.pillars { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.pillar {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 1.3rem; transition: transform .25s var(--ease), border-color .25s;
}
.pillar:hover { transform: translateY(-4px); border-color: var(--line-2); }
.pillar__ico { font-size: 1.6rem; display: block; margin-bottom: .7rem; }
.pillar h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: .35rem; }
.pillar p { font-size: .88rem; color: var(--muted); }

/* ░░ CTA ░░ */
.cta { max-width: var(--maxw); margin: 0 auto; padding: 1rem 1.5rem 6rem; }
.cta__inner {
  position: relative; overflow: hidden; text-align: center;
  background:
    radial-gradient(120% 140% at 50% 0%, rgba(59,130,246,.18), transparent 60%),
    radial-gradient(120% 140% at 50% 100%, rgba(255, 209, 69,.16), transparent 60%),
    var(--surface);
  border: 1px solid var(--line-2); border-radius: 28px; padding: 3.5rem 1.5rem;
}
.cta__inner h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; margin-bottom: .7rem; }
.cta__inner > p { color: var(--muted); max-width: 46ch; margin: 0 auto 1.8rem; }
.cta__form {
  display: flex; gap: .6rem; max-width: 480px; margin: 0 auto; flex-wrap: wrap; justify-content: center;
}
.cta__form input {
  flex: 1; min-width: 220px; padding: .9rem 1.1rem; border-radius: 999px;
  background: var(--bg); border: 1px solid var(--line-2); color: var(--text); font-size: 1rem;
}
.cta__form input::placeholder { color: var(--muted-2); }
.cta__form input:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 4px rgba(59,130,246,.18); }
.cta__status { min-height: 1.4rem; margin-top: .8rem; font-size: .92rem; font-weight: 500; }
.cta__status--ok  { color: #86efac; }
.cta__status--err { color: #fca5a5; }
.cta__fine { display: block; margin-top: .5rem; font-size: .82rem; color: var(--muted-2); }

/* ░░ Footer ░░ */
.footer { max-width: var(--maxw); margin: 0 auto; padding: 2.5rem 1.5rem 3rem; border-top: 1px solid var(--line); }
.footer__top { display: flex; align-items: center; gap: 2rem; flex-wrap: wrap; justify-content: space-between; }
.footer__links { display: flex; gap: 1.4rem; font-size: .92rem; }
.footer__links a, .footer__social a { color: var(--muted); transition: color .2s; }
.footer__links a:hover, .footer__social a:hover { color: var(--text); }
.footer__social { display: flex; gap: 1.2rem; font-size: .92rem; font-weight: 500; }
.footer__bottom {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--line);
  font-size: .85rem; color: var(--muted-2);
}
.footer__legal { display: flex; gap: 1.2rem; }
.footer__legal a:hover { color: var(--muted); }

/* ░░ Reveal animation ░░ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ░░ Responsive ░░ */
@media (max-width: 900px) {
  .nav__menu { display: none; }
  .nav__burger { display: flex; }
  .nav.is-open .nav__menu {
    display: flex; flex-direction: column; gap: 1.3rem;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg-2); border-bottom: 1px solid var(--line);
    padding: 1.4rem 1.5rem 1.6rem; box-shadow: var(--shadow);
  }
  .nav.is-open .nav__links {
    display: flex; flex-direction: column; gap: 1.1rem; margin: 0; font-size: 1.05rem;
  }
  .nav.is-open .nav__actions { display: flex; gap: .7rem; }
  .nav.is-open .nav__actions .btn { flex: 1; }
  .hero { grid-template-columns: 1fr; padding-top: 3rem; }
  .hero__visual { order: -1; }
  .about { grid-template-columns: 1fr; gap: 2.5rem; }
  .cards--3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .cards--3, .pillars { grid-template-columns: 1fr; }
  .about__intro { grid-template-columns: 1fr; justify-items: start; }
  .about__photo { max-width: 200px; }
  .hero__stats { gap: 1.6rem; }
  .footer__bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .float-chip { animation: none; }
  html { scroll-behavior: auto; }
}