/* ============================================
   SkilNexa v2 — Design Tokens
   Ink Navy #12172B | Paper #F7F8FB
   Signal Amber #FFB020 (learning/workshops)
   Circuit Teal #17B897 (software dev)
   Slate #5A6478 (secondary text)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --ink: #12172B;
  --ink-soft: #1B2140;
  --paper: #F7F8FB;
  --paper-dim: #ECEEF5;
  --amber: #FFB020;
  --teal: #17B897;
  --slate: #5A6478;
  --slate-light: #8890A3;
  --line: rgba(18, 23, 43, 0.10);
  --line-dark: rgba(247, 248, 251, 0.12);
  --radius: 14px;
  --display: 'Space Grotesk', sans-serif;
  --body: 'Inter', sans-serif;
  --mono: 'JetBrains Mono', monospace;
  --max: 1160px;
}

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  font-family: var(--body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 28px; }

h1, h2, h3, h4 { font-family: var(--display); line-height: 1.15; letter-spacing: -0.01em; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--teal);
  text-transform: lowercase;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.eyebrow::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--teal); display: inline-block; }

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* ---------- Header ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 248, 251, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 28px;
  max-width: var(--max);
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
}
.brand .dot { color: var(--teal); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 0.93rem;
  font-weight: 500;
}
.nav-links a { opacity: 0.75; transition: opacity 0.2s; }
.nav-links a:hover, .nav-links a.active { opacity: 1; }
.nav-cta {
  background: var(--ink);
  color: var(--paper) !important;
  padding: 10px 20px;
  border-radius: 999px;
  opacity: 1 !important;
  font-weight: 600;
}
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav-links { position: fixed; top: 64px; left: 0; right: 0; background: var(--paper); flex-direction: column; align-items: flex-start; padding: 20px 28px 28px; border-bottom: 1px solid var(--line); gap: 18px; transform: translateY(-130%); transition: transform 0.25s ease; }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: block; background: none; border: none; font-size: 1.4rem; cursor: pointer; color: var(--ink); }
}

/* ---------- Hero ---------- */
.hero {
  background: var(--ink);
  color: var(--paper);
  padding: 90px 0 70px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 18%, rgba(23, 184, 151, 0.18), transparent 45%),
    radial-gradient(circle at 12% 85%, rgba(255, 176, 32, 0.14), transparent 40%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: center;
  position: relative;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } }

.hero .eyebrow { color: var(--amber); }
.hero .eyebrow::before { background: var(--amber); }
.hero h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.3rem);
  font-weight: 700;
  margin-bottom: 20px;
}
.hero h1 .accent { color: var(--teal); }
.hero p.lead {
  color: rgba(247,248,251,0.72);
  font-size: 1.08rem;
  max-width: 46ch;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--teal); color: var(--ink); }
.btn-amber { background: var(--amber); color: var(--ink); }
.btn-ghost { background: transparent; border-color: rgba(247,248,251,0.3); color: var(--paper); }
.btn-ghost.dark { border-color: var(--line); color: var(--ink); }

/* Signature: terminal card */
.terminal {
  background: var(--ink-soft);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.5);
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-dark);
}
.terminal-bar span { width: 10px; height: 10px; border-radius: 50%; background: rgba(247,248,251,0.18); }
.terminal-bar span:nth-child(1) { background: #ff6159; }
.terminal-bar span:nth-child(2) { background: #ffbd2e; }
.terminal-bar span:nth-child(3) { background: #28c840; }
.terminal-title { font-family: var(--mono); font-size: 0.75rem; color: var(--slate-light); margin-left: 6px; }
.terminal-body { padding: 22px 20px 26px; font-family: var(--mono); font-size: 0.88rem; min-height: 190px; }
.terminal-body .prompt { color: var(--teal); }
.terminal-line { color: rgba(247,248,251,0.85); white-space: pre-wrap; }
.terminal-cursor { display: inline-block; width: 8px; height: 1em; background: var(--amber); vertical-align: middle; margin-left: 2px; animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.hero-stats { display: flex; gap: 28px; margin-top: 34px; flex-wrap: wrap; }
.hero-stats div { font-family: var(--mono); }
.hero-stats b { display: block; font-family: var(--display); font-size: 1.4rem; color: var(--paper); }
.hero-stats span { font-size: 0.78rem; color: var(--slate-light); }

/* ---------- Section shell ---------- */
section { padding: 84px 0; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); margin-bottom: 14px; }
.section-head p { color: var(--slate); font-size: 1.03rem; }
.section-dim { background: var(--paper-dim); }
.section-dark { background: var(--ink); color: var(--paper); }
.section-dark .section-head p { color: rgba(247,248,251,0.68); }

/* ---------- Feature cards (about) ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 40px;
}
@media (max-width: 900px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .feature-grid { grid-template-columns: 1fr; } }
.feature-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.feature-card:hover { border-color: var(--teal); transform: translateY(-3px); }
.feature-card .ico { font-family: var(--mono); font-size: 0.75rem; color: var(--teal); margin-bottom: 14px; }
.feature-card h4 { font-size: 1.02rem; margin-bottom: 8px; }
.feature-card p { color: var(--slate); font-size: 0.9rem; }

.about-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 60px; align-items: start; }
@media (max-width: 900px) { .about-grid { grid-template-columns: 1fr; gap: 30px; } }
.about-grid p { color: var(--slate); margin-bottom: 16px; }
.pill {
  display: inline-block;
  background: var(--paper-dim);
  border: 1px solid var(--line);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 18px;
}

/* ---------- Services ---------- */
.service-tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 36px; }
.tab-btn {
  font-family: var(--mono);
  font-size: 0.82rem;
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  color: var(--slate);
  transition: all 0.2s ease;
}
.tab-btn.active, .tab-btn:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 900px) { .service-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .service-grid { grid-template-columns: 1fr; } }

.service-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  position: relative;
}
.service-card .tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
  display: block;
}
.service-card.dev .tag { color: var(--teal); }
.service-card.edu .tag { color: var(--amber); }
.service-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.service-card p { color: var(--slate); font-size: 0.92rem; margin-bottom: 16px; }
.service-card ul li {
  font-size: 0.88rem;
  color: var(--ink);
  padding: 6px 0 6px 20px;
  position: relative;
  border-top: 1px dashed var(--line);
}
.service-card ul li:first-child { border-top: none; }
.service-card ul li::before { content: '→'; position: absolute; left: 0; color: var(--teal); font-family: var(--mono); }

/* ---------- Courses ---------- */
.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 900px) { .course-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .course-grid { grid-template-columns: 1fr; } }

.course-card {
  background: var(--ink-soft);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 26px 22px;
  color: var(--paper);
  display: flex;
  flex-direction: column;
}
.course-card .cat { font-family: var(--mono); font-size: 0.72rem; color: var(--amber); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px; }
.course-card h3 { font-size: 1.12rem; margin-bottom: 10px; }
.course-card p.desc { color: rgba(247,248,251,0.65); font-size: 0.88rem; margin-bottom: 18px; flex-grow: 1; }
.course-meta { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--line-dark); padding-top: 16px; margin-bottom: 18px; }
.course-meta .duration { font-family: var(--mono); font-size: 0.8rem; color: rgba(247,248,251,0.6); }
.course-meta .price { font-family: var(--display); font-weight: 700; font-size: 1.15rem; color: var(--teal); }
.course-card .btn { justify-content: center; width: 100%; }

/* ---------- Workshops teaser ---------- */
.workshop-banner {
  background: linear-gradient(120deg, var(--teal), #0f9a7d);
  border-radius: var(--radius);
  padding: 40px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  color: var(--ink);
}
.workshop-banner h3 { font-size: 1.4rem; margin-bottom: 8px; }
.workshop-banner p { max-width: 46ch; opacity: 0.85; }

/* ---------- Why choose ---------- */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; }
@media (max-width: 900px) { .why-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .why-grid { grid-template-columns: 1fr; } }
.why-card { padding: 22px 4px; border-top: 2px solid var(--teal); }
.why-card h4 { font-size: 1.02rem; margin: 10px 0 8px; }
.why-card p { color: var(--slate); font-size: 0.9rem; }
.why-card .num { font-family: var(--mono); color: var(--slate-light); font-size: 0.8rem; }

/* ---------- Vision / Mission ---------- */
.vm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 760px) { .vm-grid { grid-template-columns: 1fr; } }
.vm-card {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: 32px 28px;
  background: var(--ink-soft);
}
.vm-card h3 { color: var(--amber); font-size: 1.3rem; margin-bottom: 14px; }
.vm-card p { color: rgba(247,248,251,0.75); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 0.8fr; gap: 50px; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }
.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  font-family: var(--body);
  font-size: 0.95rem;
  background: var(--paper);
  color: var(--ink);
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { outline: 2px solid var(--teal); border-color: transparent; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.form-status { font-family: var(--mono); font-size: 0.85rem; margin-top: 12px; min-height: 20px; }
.form-status.ok { color: var(--teal); }
.form-status.err { color: #e0554f; }

.contact-info-card {
  background: var(--paper-dim);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
}
.contact-info-card h3 { font-size: 1.1rem; margin-bottom: 16px; }
.contact-row { display: flex; justify-content: space-between; padding: 12px 0; border-top: 1px dashed var(--line); font-size: 0.92rem; }
.contact-row:first-of-type { border-top: none; }
.contact-row span:first-child { color: var(--slate); }

/* ---------- Footer ---------- */
footer { background: var(--ink); color: rgba(247,248,251,0.7); padding: 56px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.1fr; gap: 34px; margin-bottom: 40px; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 500px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h4 { color: var(--paper); font-size: 0.95rem; margin-bottom: 16px; }
.footer-grid ul li { margin-bottom: 10px; font-size: 0.88rem; }
.footer-grid ul li a:hover { color: var(--teal); }
.footer-brand { font-family: var(--display); font-weight: 700; font-size: 1.2rem; color: var(--paper); margin-bottom: 12px; }
.footer-bottom { border-top: 1px solid var(--line-dark); padding-top: 22px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 0.82rem; }

/* Page header for sub-pages */
.page-hero {
  background: var(--ink);
  color: var(--paper);
  padding: 60px 0 50px;
}
.page-hero h1 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); }
.page-hero p { color: rgba(247,248,251,0.7); margin-top: 12px; max-width: 56ch; }

.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }