/* ═══════════════════════════════════════════════════
   nexus-base.css  –  shared variables & utilities
═══════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Syne:wght@700;800&display=swap');

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

:root {
  --bg:      #0B1120;
  --bg2:     #0F172A;
  --bg3:     #070B14;
  --cyan:    #22D3EE;
  --blue:    #3B82F6;
  --emerald: #34D399;
  --red:     #F87171;
  --yellow:  #FBBF24;
  --purple:  #A78BFA;
  --text:    #F1F5F9;
  --muted:   #64748B;
  --border:  rgba(255,255,255,0.07);
  --card:    rgba(255,255,255,0.04);
  --card-h:  rgba(255,255,255,0.08);
}

html { scroll-behavior: smooth; }
body {
  background: var(--bg); color: var(--text);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px; line-height: 1.6;
  overflow-x: hidden; -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
::selection { background: rgba(34,211,238,.22); }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg3); }
::-webkit-scrollbar-thumb { background: rgba(34,211,238,.3); border-radius: 4px; }

/* ── Typography ── */
.font-display { font-family: 'Syne', sans-serif; }
.gradient-text {
  background: linear-gradient(90deg, var(--cyan) 0%, #6EE7B7 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* ── Logo ── */
.logo { display:flex; align-items:center; gap:10px; cursor:pointer; text-decoration:none; }
.logo-icon {
  width:36px; height:36px; border-radius:10px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  display:flex; align-items:center; justify-content:center; flex-shrink:0;
}
.logo-icon svg { width:20px; height:20px; fill:#fff; }
.logo-text { font-family:'Syne',sans-serif; font-size:20px; font-weight:800; color:var(--text); }
.logo-text span { color:var(--cyan); }

/* ── Buttons ── */
.btn-primary {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:11px 24px; border-radius:14px;
  background:linear-gradient(90deg,var(--cyan),var(--blue));
  border:none; color:#fff; font-family:inherit; font-size:14px; font-weight:700;
  cursor:pointer; transition:transform .2s, box-shadow .2s;
}
.btn-primary:hover { transform:scale(1.03); box-shadow:0 0 24px rgba(34,211,238,.4); }
.btn-primary.full { width:100%; padding:15px; font-size:15px; border-radius:18px; }

.btn-secondary {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:11px 24px; border-radius:14px;
  background:var(--card); border:1px solid var(--border);
  color:var(--text); font-family:inherit; font-size:14px; font-weight:700;
  cursor:pointer; transition:background .2s;
}
.btn-secondary:hover { background:var(--card-h); }
.btn-secondary.full { width:100%; padding:15px; font-size:15px; border-radius:18px; }

.btn-danger {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:11px 24px; border-radius:14px;
  background:rgba(248,113,113,.12); border:1px solid rgba(248,113,113,.25);
  color:var(--red); font-family:inherit; font-size:14px; font-weight:700;
  cursor:pointer; transition:background .2s;
}
.btn-danger:hover { background:rgba(248,113,113,.22); }
.btn-danger.full { width:100%; padding:15px; border-radius:18px; }

/* ── Inputs ── */
.inp {
  width:100%; background:var(--bg3); border:1px solid var(--border);
  border-radius:14px; padding:14px 18px; color:var(--text);
  font-family:inherit; font-size:14px; outline:none;
  transition:border-color .2s;
}
.inp:focus { border-color:rgba(34,211,238,.5); }
.inp::placeholder { color:var(--muted); }
.inp-icon-wrap { position:relative; }
.inp-icon-wrap .icon { position:absolute; left:16px; top:50%; transform:translateY(-50%); color:var(--muted); pointer-events:none; }
.inp-icon-wrap .inp  { padding-left:46px; }

/* ── Cards ── */
.card {
  background:var(--card); border:1px solid var(--border);
  border-radius:24px; padding:28px;
}
.card-hover { transition:transform .25s, border-color .25s, box-shadow .25s; }
.card-hover:hover { transform:translateY(-6px); border-color:rgba(34,211,238,.3); box-shadow:0 12px 40px rgba(34,211,238,.07); }

/* ── Badge ── */
.badge {
  display:inline-flex; align-items:center; gap:5px;
  padding:4px 12px; border-radius:999px;
  font-size:11px; font-weight:700; letter-spacing:.05em;
}
.badge-cyan   { background:rgba(34,211,238,.1);  color:var(--cyan);    border:1px solid rgba(34,211,238,.2); }
.badge-green  { background:rgba(52,211,153,.1);  color:var(--emerald); border:1px solid rgba(52,211,153,.2); }
.badge-red    { background:rgba(248,113,113,.1); color:var(--red);     border:1px solid rgba(248,113,113,.2); }
.badge-yellow { background:rgba(251,191,36,.1);  color:var(--yellow);  border:1px solid rgba(251,191,36,.2); }
.badge-purple { background:rgba(167,139,250,.1); color:var(--purple);  border:1px solid rgba(167,139,250,.2); }

/* ── Warning/Info banners ── */
.banner {
  display:flex; align-items:flex-start; gap:14px;
  padding:16px 20px; border-radius:16px;
  font-size:13px; line-height:1.6;
}
.banner-amber { background:rgba(251,191,36,.08); border:1px solid rgba(251,191,36,.2); color:rgba(254,243,199,.8); }
.banner-blue  { background:rgba(59,130,246,.08); border:1px solid rgba(59,130,246,.2);  color:rgba(219,234,254,.8); }
.banner svg   { flex-shrink:0; margin-top:1px; }

/* ── Tabs ── */
.tabs { display:flex; border-bottom:1px solid var(--border); }
.tab-btn {
  flex:1; padding:14px; text-align:center; background:none; border:none;
  color:var(--muted); font-family:inherit; font-size:14px; font-weight:700;
  cursor:pointer; transition:color .2s; position:relative;
}
.tab-btn.active { color:var(--cyan); }
.tab-btn.active::after {
  content:''; position:absolute; bottom:-1px; left:0; right:0;
  height:2px; background:var(--cyan); border-radius:2px;
}
.tab-panel { display:none; }
.tab-panel.active { display:block; }

/* ── Bottom Nav ── */
.bottom-nav {
  position:fixed; bottom:0; left:0; right:0; z-index:50;
  background:rgba(7,11,20,.92); backdrop-filter:blur(20px);
  border-top:1px solid var(--border);
  padding:10px 24px 14px;
}
.bottom-nav-inner {
  max-width:480px; margin:0 auto;
  display:flex; justify-content:space-around; align-items:center;
}
.nav-btn {
  display:flex; flex-direction:column; align-items:center; gap:4px;
  background:none; border:none; cursor:pointer; color:var(--muted);
  font-family:inherit; font-size:10px; font-weight:600; letter-spacing:.08em; text-transform:uppercase;
  transition:color .2s;
  text-decoration:none;
}
.nav-btn:hover, .nav-btn.active { color:var(--cyan); }
.nav-btn svg { width:24px; height:24px; }

/* ── App Header ── */
.app-header {
  position:sticky; top:0; z-index:40;
  background:rgba(7,11,20,.85); backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);
  padding:0 20px; height:60px;
  display:flex; align-items:center; justify-content:space-between;
}
.app-header-title {
  font-family:'Syne',sans-serif; font-size:20px; font-weight:800; color:var(--cyan);
  display:flex; align-items:center; gap:8px;
}
.app-header-title svg { width:22px; height:22px; }

/* ── Icon-btn ── */
.icon-btn {
  width:38px; height:38px; border-radius:10px;
  background:none; border:none; cursor:pointer;
  color:var(--muted); display:flex; align-items:center; justify-content:center;
  transition:color .2s, background .2s;
}
.icon-btn:hover { color:var(--text); background:var(--card); }
.icon-btn svg { width:20px; height:20px; }

/* ── Divider ── */
.divider { border:none; border-top:1px solid var(--border); margin:0; }

/* ── Grid helpers ── */
.g2 { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.g3 { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
.g4 { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }

/* ── Spacing ── */
.mb-4  { margin-bottom:4px;  }
.mb-8  { margin-bottom:8px;  }
.mb-12 { margin-bottom:12px; }
.mb-16 { margin-bottom:16px; }
.mb-20 { margin-bottom:20px; }
.mb-24 { margin-bottom:24px; }
.mb-32 { margin-bottom:32px; }
.mt-auto { margin-top:auto; }
.space-y-12 > * + * { margin-top:12px; }
.space-y-16 > * + * { margin-top:16px; }
.space-y-20 > * + * { margin-top:20px; }
.space-y-24 > * + * { margin-top:24px; }

/* ── Flex ── */
.flex        { display:flex; }
.flex-col    { flex-direction:column; }
.items-center { align-items:center; }
.justify-between { justify-content:space-between; }
.gap-8  { gap:8px; }
.gap-12 { gap:12px; }
.gap-16 { gap:16px; }

/* ── Text ── */
.text-muted   { color:var(--muted); }
.text-cyan    { color:var(--cyan); }
.text-emerald { color:var(--emerald); }
.text-red     { color:var(--red); }
.text-yellow  { color:var(--yellow); }
.text-xs  { font-size:11px; }
.text-sm  { font-size:13px; }
.text-lg  { font-size:18px; }
.text-xl  { font-size:22px; }
.text-2xl { font-size:28px; }
.font-bold { font-weight:700; }
.uppercase { text-transform:uppercase; letter-spacing:.07em; }

/* ── Toggle switch ── */
.toggle { position:relative; display:inline-block; width:46px; height:24px; }
.toggle input { opacity:0; width:0; height:0; }
.toggle-slider {
  position:absolute; inset:0; background:var(--muted); border-radius:999px; cursor:pointer;
  transition:background .3s;
}
.toggle-slider::before {
  content:''; position:absolute; width:18px; height:18px; border-radius:50%;
  background:#fff; left:3px; top:3px; transition:transform .3s;
}
.toggle input:checked + .toggle-slider { background:var(--cyan); }
.toggle input:checked + .toggle-slider::before { transform:translateX(22px); }

/* ── Scrollbar thin ── */
.thin-scroll::-webkit-scrollbar { width:4px; }
.thin-scroll::-webkit-scrollbar-thumb { background:var(--border); border-radius:4px; }

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity:0; transform:translateY(20px); }
  to   { opacity:1; transform:translateY(0); }
}
@keyframes spin { to { transform:rotate(360deg); } }
.spin { animation:spin .8s linear infinite; }

/* ── Page wrapper ── */
.page-wrap { padding-bottom:90px; max-width:1280px; margin:0 auto; padding-left:20px; padding-right:20px; }

/* ── Responsive ── */
@media (max-width:768px) {
  .g3 { grid-template-columns:1fr; }
  .g4 { grid-template-columns:1fr 1fr; }
  .hide-mobile { display:none !important; }
}
@media (max-width:480px) {
  .g2 { grid-template-columns:1fr; }
  .g4 { grid-template-columns:1fr 1fr; }
}