/* ============================================================
   LearnHub — Sistem de design al PLATFORMEI
   Identitate proprie: "academie tech la miezul nopții"
   Bază închisă + accent portocaliu #FF6B2B (continuitate cu cursurile)
   Display: Space Grotesk · Body: DM Sans · (PT Sans în cursuri)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600;9..40,700&display=swap');

:root {
  --accent:       #FF6B2B;
  --accent-2:     #FF8F5C;
  --accent-soft:  rgba(255,107,43,.12);
  --accent-glow:  rgba(255,107,43,.35);

  --bg:           #0A0B12;
  --bg-2:         #0E1018;
  --surface:      #14161F;
  --surface-2:    #1A1D28;
  --glass:        rgba(22,25,35,.55);
  --glass-brd:    rgba(255,255,255,.08);
  --glass-brd-hi: rgba(255,255,255,.16);

  --text:         #F4F5FA;
  --text-soft:    #A8ADBE;
  --text-mute:    #6B7185;
  --line:         rgba(255,255,255,.07);

  --gold:   #FBBF24;
  --silver: #CBD5E1;
  --bronze: #D9844B;
  --green:  #34D399;
  --blue:   #60A5FA;
  --violet: #A78BFA;
  --red:    #F87171;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  --radius:    14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --shadow:    0 10px 40px rgba(0,0,0,.45);
  --shadow-lg: 0 24px 70px rgba(0,0,0,.6);
  --ease:      cubic-bezier(.22,.61,.36,1);
}

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

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 15.5px;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

h1,h2,h3,h4 { font-family: var(--font-display); letter-spacing: -.02em; line-height: 1.1; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------- Ambient background (animated) ---------- */
.bg-aura {
  position: fixed; inset: 0; z-index: -2; overflow: hidden;
  background:
    radial-gradient(60vw 60vw at 85% -10%, rgba(255,107,43,.10), transparent 60%),
    radial-gradient(50vw 50vw at -10% 100%, rgba(124,58,237,.10), transparent 55%),
    var(--bg);
}
.bg-aura::before {
  content:''; position:absolute; inset:-50%;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,.04) 0 1px, transparent 1px),
    radial-gradient(circle at 70% 60%, rgba(255,255,255,.03) 0 1px, transparent 1px);
  background-size: 42px 42px, 60px 60px;
  animation: drift 60s linear infinite;
}
@keyframes drift { to { transform: translate(42px, 60px); } }

.bg-grid {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
                    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  opacity: .5;
}

/* ---------- Layout shell ---------- */
.wrap { width: min(1180px, 92vw); margin-inline: auto; }

.topbar {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(16px);
  background: rgba(10,11,18,.72);
  border-bottom: 1px solid var(--glass-brd);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: flex; align-items: center; gap: 11px; font-family: var(--font-display); font-weight: 700; font-size: 19px; }
.brand .logo-mark {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 18px var(--accent-glow); font-size: 18px;
}
.brand .o { color: var(--accent); }
.nav-actions { display: flex; align-items: center; gap: 10px; }

.chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12.5px; font-weight: 600; padding: 6px 13px; border-radius: 99px;
  background: var(--accent-soft); color: var(--accent-2);
  border: 1px solid rgba(255,107,43,.25);
}
.chip-muted { background: rgba(255,255,255,.04); color: var(--text-soft); border-color: var(--glass-brd); }

/* ---------- Buttons ---------- */
.btn {
  --b: var(--accent);
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--font-body); font-weight: 600; font-size: 14.5px;
  padding: 12px 22px; border-radius: 12px; border: 1px solid transparent;
  cursor: pointer; transition: transform .2s var(--ease), box-shadow .25s, background .25s, border-color .25s;
  white-space: nowrap;
}
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; box-shadow: 0 10px 26px var(--accent-glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px var(--accent-glow); }
.btn-primary::after { content:''; position:absolute; top:0; left:-120%; width:55%; height:100%; background:rgba(255,255,255,.25); transform:skewX(-20deg); transition:left .6s var(--ease); }
.btn-primary:hover::after { left:160%; }
.btn-ghost { background: rgba(255,255,255,.04); color: var(--text); border-color: var(--glass-brd-hi); }
.btn-ghost:hover { background: rgba(255,255,255,.09); transform: translateY(-1px); }
.btn-block { width: 100%; }
.btn-lg { padding: 15px 30px; font-size: 16px; border-radius: 14px; }

/* ---------- Hero ---------- */
.hero { padding: 84px 0 50px; position: relative; }
.hero-eyebrow {
  display:inline-flex; align-items:center; gap:8px; margin-bottom:22px;
  font-size:12.5px; font-weight:600; letter-spacing:.08em; text-transform:uppercase;
  color: var(--accent-2);
  padding:7px 15px; border-radius:99px;
  background: var(--accent-soft); border:1px solid rgba(255,107,43,.25);
}
.hero h1 { font-size: clamp(34px, 6vw, 66px); font-weight: 700; margin-bottom: 22px; }
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent) 10%, var(--accent-2) 50%, #FFD0B8 90%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-lead { font-size: clamp(16px, 2vw, 20px); color: var(--text-soft); max-width: 640px; margin-bottom: 34px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.hero-stats { display: flex; gap: 40px; flex-wrap: wrap; margin-top: 52px; padding-top: 34px; border-top: 1px solid var(--line); }
.hstat .n { font-family: var(--font-display); font-size: 34px; font-weight: 700; color: var(--text); }
.hstat .n .u { color: var(--accent); }
.hstat .l { font-size: 12.5px; color: var(--text-mute); text-transform: uppercase; letter-spacing: .08em; margin-top: 3px; }

/* ---------- Section headers ---------- */
.section { padding: 40px 0 30px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 30px; flex-wrap: wrap; }
.section-head .eyebrow { font-size: 12.5px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 9px; }
.section-head h2 { font-size: clamp(24px, 3.4vw, 36px); font-weight: 700; }
.section-head p { color: var(--text-soft); margin-top: 8px; max-width: 520px; }

/* ---------- Course cards grid ---------- */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 22px; }

.course-card {
  position: relative; overflow: hidden;
  background: var(--glass);
  border: 1px solid var(--glass-brd);
  border-radius: var(--radius-lg);
  padding: 26px 24px 22px;
  backdrop-filter: blur(14px);
  transition: transform .35s var(--ease), border-color .35s, box-shadow .35s;
  opacity: 0; transform: translateY(24px);
}
.course-card.in { opacity: 1; transform: none; }
.course-card::before {
  content:''; position:absolute; inset:0; border-radius:inherit; padding:1px;
  background: linear-gradient(135deg, var(--cc, var(--accent)), transparent 45%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .35s;
}
.course-card:hover { transform: translateY(-7px); box-shadow: var(--shadow-lg); border-color: transparent; }
.course-card:hover::before { opacity: 1; }
.course-card .glow {
  position:absolute; width:180px; height:180px; border-radius:50%; top:-60px; right:-50px;
  background: var(--cc, var(--accent)); filter: blur(70px); opacity: .14; transition: opacity .35s;
}
.course-card:hover .glow { opacity: .28; }

.cc-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.cc-icon {
  width: 54px; height: 54px; border-radius: 15px; display: grid; place-items: center; font-size: 27px;
  background: rgba(255,255,255,.05); border: 1px solid var(--glass-brd);
}
.cc-badge-state { font-size: 11.5px; font-weight: 700; padding: 5px 11px; border-radius: 99px; letter-spacing: .03em; }
.state-done { background: rgba(52,211,153,.14); color: var(--green); border:1px solid rgba(52,211,153,.3); }
.state-prog { background: var(--accent-soft); color: var(--accent-2); border:1px solid rgba(255,107,43,.3); }
.state-new  { background: rgba(255,255,255,.05); color: var(--text-mute); border:1px solid var(--glass-brd); }

.cc-title { font-family: var(--font-display); font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.cc-sub   { font-size: 13.5px; color: var(--text-soft); margin-bottom: 18px; min-height: 38px; }
.cc-meta  { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.cc-tag   { font-size: 11.5px; color: var(--text-mute); padding: 4px 10px; border-radius: 8px; background: rgba(255,255,255,.04); border:1px solid var(--line); }

.cc-progress { margin-bottom: 18px; }
.cc-progress .bar { height: 7px; border-radius: 99px; background: rgba(255,255,255,.07); overflow: hidden; }
.cc-progress .fill { height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--cc, var(--accent)), var(--accent-2)); width: 0; transition: width 1.1s var(--ease); }
.cc-progress .lbl { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-mute); margin-top: 8px; }
.cc-progress .lbl b { color: var(--text-soft); }

.cc-foot { display: flex; align-items: center; gap: 10px; }

/* ---------- Footer ---------- */
.site-foot { border-top: 1px solid var(--line); margin-top: 60px; padding: 34px 0; color: var(--text-mute); font-size: 13.5px; }
.site-foot .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 14px; }

/* ---------- Reveal-on-scroll utility ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Toast ---------- */
.toast-wrap { position: fixed; right: 22px; bottom: 22px; z-index: 90; display: flex; flex-direction: column; gap: 12px; }
.toast {
  display: flex; align-items: center; gap: 13px; min-width: 280px; max-width: 360px;
  padding: 14px 18px; border-radius: 14px; backdrop-filter: blur(14px);
  background: var(--glass); border: 1px solid var(--glass-brd-hi); box-shadow: var(--shadow-lg);
  transform: translateX(120%); transition: transform .45s var(--ease);
  border-left: 3px solid var(--accent);
}
.toast.in { transform: none; }
.toast .ic { font-size: 24px; }
.toast .tt { font-family: var(--font-display); font-weight: 700; font-size: 14px; }
.toast .ts { font-size: 12.5px; color: var(--text-soft); }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .hero { padding: 54px 0 34px; }
  .hero-stats { gap: 26px; }
  .nav-actions .hide-sm { display: none; }
  .section-head { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .reveal, .course-card { opacity: 1 !important; transform: none !important; }
}

/* ---------- Accesibilitate: skip link ---------- */
.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 200;
  background: var(--accent); color: #fff; padding: 10px 18px; border-radius: 0 0 10px 10px;
  font-weight: 600; transition: top .2s;
}
.skip-link:focus { top: 0; outline: 2px solid #fff; }

/* focus vizibil consistent pentru tastatură */
a:focus-visible, button:focus-visible, input:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent-2); outline-offset: 2px;
}