/* =====================================================================
   BORA ACADEMY — Design System
   Palette: near-black canvas, electric-blue/cyan signal (from the mark),
   warm amber reserved only for "hired / success" moments.
   Type: Sora (display) + Inter (body) + JetBrains Mono (code/questions)
   ===================================================================== */

:root {
  --ink:        #060911;
  --surface:    #0c111d;
  --surface-2:  #121a2b;
  --surface-3:  #182238;
  --border:     #232f47;
  --text:       #eef2fb;
  --text-dim:   #9aa5bd;
  --text-faint: #5f6a85;

  --blue:       #2f7dff;
  --blue-soft:  rgba(47, 125, 255, .14);
  --cyan:       #34e0ff;
  --amber:      #ffb545;

  --grad-signal: linear-gradient(135deg, var(--blue) 0%, var(--cyan) 100%);

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

  --shadow-glow: 0 0 0 1px rgba(52,224,255,.08), 0 20px 60px -20px rgba(47,125,255,.35);
  --ease: cubic-bezier(.16,.84,.44,1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--ink);
  color: var(--text);
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, .display {
  font-family: 'Sora', 'Inter', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

code, .mono, .q-code { font-family: 'JetBrains Mono', monospace; }

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

::selection { background: var(--blue); color: #fff; }

/* Background ambient grid + glow (signature motif: fragmented sphere echo) */
.bg-noise {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(47,125,255,.12), transparent 40%),
    radial-gradient(circle at 85% 0%, rgba(52,224,255,.10), transparent 45%),
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: auto, auto, 64px 64px, 64px 64px;
  background-color: var(--ink);
  opacity: .5;
}

.container-xl { max-width: 1240px; margin-inline: auto; padding-inline: 24px; }

/* ---------------- Navbar ---------------- */
.navbar-ba {
  position: sticky; top: 0; z-index: 100;
  background: rgba(6,9,17,.72);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.navbar-ba .brand { display: flex; align-items: center; gap: 10px; font-family: 'Sora',sans-serif; font-weight: 700; font-size: 1.15rem; }
.navbar-ba .brand img { height: 34px; width: auto; }
.navbar-ba .nav-link { color: var(--text-dim); font-weight: 500; font-size: .92rem; padding: 8px 14px !important; border-radius: 8px; transition: all .2s var(--ease); }
.navbar-ba .nav-link:hover, .navbar-ba .nav-link.active { color: var(--text); background: var(--surface-2); }
.btn-signal {
  background: var(--grad-signal); color: #04101f !important; font-weight: 700;
  border: none; border-radius: 10px; padding: 10px 20px; font-size: .9rem;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.btn-signal:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); color: #04101f; }
.btn-ghost {
  background: transparent; color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 20px; font-size: .9rem; font-weight: 600;
  transition: all .2s var(--ease);
}
.btn-ghost:hover { border-color: var(--blue); background: var(--blue-soft); color: var(--text); }

/* ---------------- Hero ---------------- */
.hero { padding: 96px 0 72px; position: relative; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .78rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--cyan); background: var(--blue-soft); border: 1px solid rgba(52,224,255,.25);
  padding: 6px 14px; border-radius: 100px; margin-bottom: 22px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{ opacity:1 } 50%{ opacity:.35 } }

.hero h1 { font-size: clamp(2.2rem, 4.6vw, 3.8rem); line-height: 1.08; margin-bottom: 22px; }
.hero h1 .accent { background: var(--grad-signal); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { color: var(--text-dim); font-size: 1.12rem; max-width: 520px; margin-bottom: 32px; }

.hero-stats { display: flex; gap: 36px; margin-top: 48px; flex-wrap: wrap; }
.hero-stats .stat b { font-family: 'Sora',sans-serif; font-size: 1.7rem; display: block; }
.hero-stats .stat span { color: var(--text-faint); font-size: .82rem; }

/* Signature element: mock-interview terminal card */
.terminal {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow); overflow: hidden;
  animation: floaty 6s ease-in-out infinite;
}
@keyframes floaty { 0%,100%{ transform: translateY(0) } 50%{ transform: translateY(-10px) } }
.terminal .bar { display: flex; align-items: center; gap: 8px; padding: 14px 18px; background: var(--surface-2); border-bottom: 1px solid var(--border); }
.terminal .bar span { width: 11px; height: 11px; border-radius: 50%; background: var(--border); }
.terminal .bar .label { margin-left: auto; color: var(--text-faint); font-size: .75rem; font-family: 'JetBrains Mono',monospace; }
.terminal .body { padding: 22px; font-family: 'JetBrains Mono',monospace; font-size: .86rem; }
.terminal .line { margin-bottom: 14px; opacity: 0; animation: typeIn .5s var(--ease) forwards; }
.terminal .line:nth-child(1){ animation-delay: .2s }
.terminal .line:nth-child(2){ animation-delay: .8s }
.terminal .line:nth-child(3){ animation-delay: 1.6s }
.terminal .line:nth-child(4){ animation-delay: 2.3s }
@keyframes typeIn { from{ opacity:0; transform: translateY(6px) } to{ opacity:1; transform: translateY(0) } }
.terminal .tag { color: var(--text-faint); }
.terminal .q { color: var(--cyan); }
.terminal .a { color: var(--text); }
.terminal .badge-ok { display:inline-block; margin-top: 4px; color: #7ce8a0; background: rgba(124,232,160,.1); border: 1px solid rgba(124,232,160,.25); padding: 3px 10px; border-radius: 100px; font-size: .72rem; }

/* ---------------- Sections ---------------- */
section { padding: 88px 0; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head .kicker { color: var(--blue); font-weight: 700; font-size: .82rem; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 10px; display: block; }
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); margin-bottom: 12px; }
.section-head p { color: var(--text-dim); }

.card-ba {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 26px; transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
  height: 100%;
}
.card-ba:hover { transform: translateY(-6px); border-color: rgba(52,224,255,.35); box-shadow: var(--shadow-glow); }

/* Track cards */
.track-card .icon-tile {
  width: 46px; height: 46px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  background: var(--blue-soft); color: var(--cyan); font-size: 1.2rem; margin-bottom: 18px;
}
.track-card h4 { font-size: 1.05rem; margin-bottom: 8px; }
.track-card p { color: var(--text-dim); font-size: .88rem; margin-bottom: 16px; }
.track-card .meta { display: flex; gap: 14px; font-size: .78rem; color: var(--text-faint); border-top: 1px solid var(--border); padding-top: 14px; }

/* Course cards */
.course-card { padding: 0; overflow: hidden; }
.course-card .thumb { height: 150px; background: var(--surface-3); position: relative; display:flex; align-items:center; justify-content:center; }
.course-card .thumb .glyph { font-size: 2.2rem; color: var(--cyan); opacity: .5; }
.course-card .body { padding: 20px; }
.course-card .level-pill { font-size: .68rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--cyan); background: var(--blue-soft); padding: 3px 10px; border-radius: 100px; }
.course-card h4 { font-size: 1rem; margin: 12px 0 8px; }
.course-card .price { font-family:'Sora',sans-serif; font-weight:700; font-size: 1.1rem; }
.course-card .price .old { text-decoration: line-through; color: var(--text-faint); font-weight: 400; font-size: .85rem; margin-left: 8px; }

/* Question bank preview */
.q-item { border-bottom: 1px solid var(--border); padding: 18px 0; }
.q-item:last-child { border-bottom: none; }
.q-item .qhead { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; cursor: pointer; }
.q-item .difficulty { font-size: .7rem; padding: 2px 9px; border-radius: 100px; font-weight: 700; white-space: nowrap; }
.difficulty.easy { color: #7ce8a0; background: rgba(124,232,160,.1); }
.difficulty.medium { color: var(--amber); background: rgba(255,181,69,.1); }
.difficulty.hard { color: #ff7d7d; background: rgba(255,125,125,.1); }

/* Pricing */
.price-card { text-align: center; position: relative; }
.price-card.popular { border-color: var(--cyan); box-shadow: var(--shadow-glow); }
.price-card .tag-popular { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--grad-signal); color: #04101f; font-size: .7rem; font-weight: 700; padding: 4px 14px; border-radius: 100px; }
.price-card .amount { font-family: 'Sora',sans-serif; font-size: 2.4rem; font-weight: 700; margin: 14px 0; }
.price-card .amount span { font-size: 1rem; color: var(--text-faint); font-weight: 400; }
.price-card ul { list-style: none; padding: 0; margin: 22px 0; text-align: left; }
.price-card ul li { display: flex; gap: 10px; margin-bottom: 12px; color: var(--text-dim); font-size: .9rem; }
.price-card ul li i { color: var(--cyan); }

/* Testimonials */
.tmn-card { padding: 26px; }
.tmn-card .stars { color: var(--amber); font-size: .85rem; margin-bottom: 12px; }
.tmn-card p { color: var(--text-dim); font-size: .92rem; }
.tmn-card .who { display: flex; align-items: center; gap: 12px; margin-top: 18px; }
.tmn-card .avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--grad-signal); display:flex; align-items:center; justify-content:center; font-weight:700; color:#04101f; font-size:.85rem; }
.tmn-card .who small { color: var(--text-faint); display:block; }

/* Companies strip */
.companies-strip { display: flex; flex-wrap: wrap; gap: 40px; align-items: center; justify-content: space-between; opacity: .65; }
.companies-strip span { font-family: 'Sora',sans-serif; font-weight: 700; font-size: 1.1rem; color: var(--text-faint); }

/* CTA */
.cta-band {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 56px; text-align: center; position: relative; overflow: hidden;
}
.cta-band::before { content:''; position:absolute; inset:0; background: radial-gradient(circle at 50% 0%, rgba(47,125,255,.18), transparent 60%); }

/* Forms */
.form-ba label { font-size: .85rem; color: var(--text-dim); margin-bottom: 6px; font-weight: 500; }
.form-ba .form-control {
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text);
  border-radius: 10px; padding: 12px 14px; font-size: .92rem;
}
.form-ba .form-control:focus { background: var(--surface-2); border-color: var(--blue); color: var(--text); box-shadow: 0 0 0 3px var(--blue-soft); }
.form-ba .form-control::placeholder { color: var(--text-faint); }
.auth-card { max-width: 440px; margin: 0 auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px; }

/* Footer */
footer.ba-footer { border-top: 1px solid var(--border); padding: 64px 0 28px; background: var(--surface); }
footer.ba-footer h6 { font-family: 'Sora',sans-serif; font-size: .82rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-faint); margin-bottom: 18px; }
footer.ba-footer a.flink { display: block; color: var(--text-dim); font-size: .9rem; margin-bottom: 10px; transition: color .2s; }
footer.ba-footer a.flink:hover { color: var(--cyan); }
footer.ba-footer .bottom { border-top: 1px solid var(--border); margin-top: 40px; padding-top: 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; color: var(--text-faint); font-size: .82rem; }

/* Utility */
.text-dim { color: var(--text-dim); }
.text-faint { color: var(--text-faint); }
.text-cyan { color: var(--cyan); }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}

@media (max-width: 767px) {
  .hero { padding: 56px 0 40px; text-align: left; }
  section { padding: 56px 0; }
  .cta-band { padding: 36px 22px; }
}

/* Visible focus for accessibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 2px;
}