:root,
[data-bs-theme="light"],
[data-bs-theme="dark"] {
  --h-bg: #070708;
  --h-panel: #101013;
  --h-panel2: #16161a;
  --h-line: #26262c;
  --h-red: #ff2030;
  --h-red-dim: #b3141f;
  --h-text: #e8e8ec;
  --h-muted: #8a8a94;
  --h-mono: ui-monospace, "JetBrains Mono", "Fira Code", Consolas, "DejaVu Sans Mono", monospace;

  --bs-body-bg: var(--h-bg);
  --bs-body-color: var(--h-text);
  --bs-border-color: var(--h-line);
  --bs-link-color: var(--h-red);
  --bs-link-hover-color: #ff5563;
  --bs-link-color-rgb: 255, 32, 48;
  --bs-link-hover-color-rgb: 255, 85, 99;
  --bs-primary: var(--h-red);
  --bs-primary-rgb: 255, 32, 48;
  --bs-secondary-color: var(--h-muted);
  --bs-tertiary-bg: var(--h-panel);
  --bs-secondary-bg: var(--h-panel2);
  --bs-emphasis-color: #fff;
  --bs-card-bg: var(--h-panel);
  --bs-border-radius: 4px;
  --bs-border-radius-sm: 3px;
  --bs-border-radius-lg: 6px;
  color-scheme: dark;
}

html, body { background: var(--h-bg) !important; color: var(--h-text); }
body { min-height: 100vh; }

h1, h2, h3, h4, h5, h6 { color: #fff; font-weight: 700; letter-spacing: 0.02em; }
a { text-decoration: none; }

.jumbotron {
  background: radial-gradient(ellipse 60% 120% at 50% 0%, rgba(255, 32, 48, 0.16), transparent 70%), var(--h-bg) !important;
  border: 0 !important;
  border-bottom: 1px solid var(--h-line) !important;
  margin-bottom: 2rem;
}
.jumbotron h1 { font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase; }
.jumbotron h1::after { content: ""; display: block; width: 56px; height: 3px; margin: 0.8rem auto 0; background: var(--h-red); border-radius: 2px; }
.bg-light, .bg-body-tertiary { background: var(--h-panel) !important; }

main form {
  background: var(--h-panel);
  border: 1px solid var(--h-line);
  border-radius: 8px;
  padding: 1.75rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}
main form .form-control { padding: 0.65rem 0.85rem; }
main form label { color: var(--h-muted); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; }

.navbar {
  background: rgba(7, 7, 8, 0.96) !important;
  border-bottom: 2px solid var(--h-red);
}
.navbar-brand {
  color: #fff !important;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.navbar-brand img.brand-logo { height: 30px; width: 30px; }
.navbar .nav-link { color: var(--h-text) !important; }
.navbar .nav-link:hover, .navbar .nav-link.active { color: var(--h-red) !important; }

.card, .modal-content, .dropdown-menu, .list-group-item, .accordion-item {
  background: var(--h-panel) !important;
  border: 1px solid var(--h-line) !important;
  color: var(--h-text);
}
.card:hover { border-color: var(--h-red-dim) !important; }
.modal-header, .modal-footer, .card-header, .card-footer { border-color: var(--h-line) !important; background: var(--h-panel2) !important; }

.form-control, .form-select, .input-group-text {
  background: #0b0b0e !important;
  color: var(--h-text) !important;
  border: 1px solid var(--h-line) !important;
}
.form-control::placeholder { color: var(--h-muted); }
.form-control:focus, .form-select:focus {
  border-color: var(--h-red) !important;
  box-shadow: 0 0 0 0.15rem rgba(255, 32, 48, 0.25) !important;
}

.btn-primary, .btn-success {
  background: var(--h-red) !important;
  border: 1px solid var(--h-red) !important;
  color: #fff !important;
}
.btn-primary, .btn-success { box-shadow: 0 4px 18px rgba(255, 32, 48, 0.3); border-radius: 6px; }
.btn-primary:hover, .btn-success:hover { background: #ff4552 !important; border-color: #ff4552 !important; }
.btn-outline-primary { color: var(--h-red) !important; border-color: var(--h-red) !important; background: transparent !important; }
.btn-outline-primary:hover { background: var(--h-red) !important; color: #fff !important; }
.btn-outline-secondary, .btn-secondary, .btn-dark {
  background: transparent !important;
  color: var(--h-text) !important;
  border: 1px solid var(--h-line) !important;
}
.btn-outline-secondary:hover, .btn-secondary:hover, .btn-dark:hover { border-color: var(--h-red) !important; color: var(--h-red) !important; }

.table { --bs-table-bg: transparent; --bs-table-color: var(--h-text); --bs-table-border-color: var(--h-line); --bs-table-striped-bg: rgba(255, 255, 255, 0.02); --bs-table-hover-bg: rgba(255, 32, 48, 0.08); }
.table thead th { color: var(--h-red); border-bottom: 2px solid var(--h-red-dim); text-transform: uppercase; font-size: 0.8rem; letter-spacing: 0.08em; }

.challenge-button {
  background: var(--h-panel) !important;
  border: 1px solid var(--h-line) !important;
  color: var(--h-text) !important;
  transition: border-color .15s, transform .15s;
}
.challenge-button:hover { border-color: var(--h-red) !important; transform: translateY(-1px); }
.solved-challenge { border-color: #22c55e !important; background: rgba(34, 197, 94, 0.08) !important; }

.badge.bg-secondary, .badge.bg-primary { background: var(--h-red) !important; color: #fff !important; }

.alert { background: var(--h-panel) !important; border: 1px solid var(--h-line) !important; color: var(--h-text) !important; }
.alert-danger { border-color: var(--h-red) !important; }

.nav-tabs { border-color: var(--h-line) !important; }
.nav-tabs .nav-link { color: var(--h-muted) !important; }
.nav-tabs .nav-link.active { background: var(--h-panel) !important; color: var(--h-red) !important; border-color: var(--h-line) var(--h-line) var(--h-panel) !important; }

.progress { background: #0b0b0e; border: 1px solid var(--h-line); }
.progress-bar { background: var(--h-red) !important; }

code, pre, kbd { font-family: var(--h-mono); color: #ff8a93; background: #0b0b0e; border: 1px solid var(--h-line); padding: 0.1em 0.35em; }
hr { border-color: var(--h-line); opacity: 1; }

.footer { border-top: 1px solid var(--h-line); background: transparent !important; }
.footer a, .footer small { color: var(--h-muted) !important; }

::selection { background: var(--h-red); color: #fff; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--h-bg); }
::-webkit-scrollbar-thumb { background: var(--h-line); }
::-webkit-scrollbar-thumb:hover { background: var(--h-red-dim); }

.hero { padding: 5rem 1rem 3rem; background: radial-gradient(ellipse 55% 90% at 50% 0%, rgba(255, 32, 48, 0.18), transparent 70%); }
.hero-tag { display: inline-block; padding: 0.25rem 0.8rem; border: 1px solid var(--h-red-dim); color: var(--h-red); border-radius: 999px; font-family: var(--h-mono); font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 1.25rem; }
h1.hero-title { font-size: clamp(3rem, 9vw, 6rem); font-weight: 800; letter-spacing: 0.02em; margin: 0 0 1rem; }
h1.hero-title span { color: var(--h-red); }
h1.hero-title::after { display: none; }
.hero-sub { max-width: 680px; margin: 0 auto; color: var(--h-muted); font-size: 1.15rem; }
.about { max-width: 900px; padding-bottom: 4rem; }
.about-block { margin-bottom: 3rem; }
.about-block h2 { font-size: 1.4rem; text-transform: uppercase; letter-spacing: 0.06em; padding-bottom: 0.6rem; margin-bottom: 1.25rem; border-bottom: 1px solid var(--h-line); }
.about-block h2::before { content: ""; display: inline-block; width: 10px; height: 10px; background: var(--h-red); margin-right: 0.7rem; border-radius: 2px; }
.about-block p { color: var(--h-text); line-height: 1.7; }
.about-block .muted { color: var(--h-muted); font-size: 0.9rem; }
.timeline { border-left: 2px solid var(--h-line); margin-left: 0.4rem; }
.tl-item { position: relative; padding: 0 0 1.5rem 1.6rem; }
.tl-item::before { content: ""; position: absolute; left: -7px; top: 0.45rem; width: 12px; height: 12px; background: var(--h-red); border-radius: 50%; box-shadow: 0 0 0 4px var(--h-bg); }
.tl-year { font-family: var(--h-mono); color: var(--h-red); font-weight: 700; margin-bottom: 0.25rem; }
.tl-body { color: var(--h-text); line-height: 1.65; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.stat { background: var(--h-panel); border: 1px solid var(--h-line); border-radius: 8px; padding: 1.25rem; }
.stat-n { font-size: 2.4rem; font-weight: 800; color: var(--h-red); line-height: 1; }
.stat-l { color: var(--h-muted); font-size: 0.9rem; margin-top: 0.5rem; }
.repos { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; }
.repo { display: block; background: var(--h-panel); border: 1px solid var(--h-line); border-radius: 8px; padding: 1.1rem 1.25rem; color: var(--h-text); transition: border-color .15s, transform .15s; }
.repo:hover { border-color: var(--h-red-dim); transform: translateY(-2px); color: var(--h-text); }
.repo b { display: block; color: #fff; margin-bottom: 0.3rem; font-family: var(--h-mono); }
.repo span { color: var(--h-muted); font-size: 0.9rem; }
.links { list-style: none; padding: 0; margin: 0; }
.links li { padding: 0.7rem 0; border-bottom: 1px solid var(--h-line); }
.links a::before { content: "↗"; color: var(--h-red); margin-right: 0.6rem; }

.services { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }
.service { display: flex; flex-direction: column; align-items: flex-start; gap: 0.2rem; padding: 1.4rem; background: var(--h-panel); border: 1px solid var(--h-line); border-radius: 10px; color: var(--h-text); transition: border-color .15s, transform .15s, box-shadow .15s; }
.service:hover { border-color: var(--h-red); transform: translateY(-3px); box-shadow: 0 10px 30px rgba(255, 32, 48, 0.15); color: var(--h-text); }
.service svg { width: 34px; height: 34px; color: var(--h-red); margin-bottom: 0.8rem; }
.service-name { font-weight: 700; font-size: 1.1rem; color: #fff; }
.service-sub { font-size: 0.85rem; color: var(--h-muted); font-family: var(--h-mono); }