/* Midnight / paper / comic-book accent. No external fonts or trackers. */
:root, [data-bs-theme="light"], [data-bs-theme="dark"] {
  --event-ink: #0c1425; --event-panel: #152139; --event-line: #33415a;
  --event-paper: #f7f3e9; --event-muted: #b9c6db; --event-blue: #94baff;
  --event-red: #e34a50; --bs-body-bg: #0c1425; --bs-body-color: #f7f3e9;
  --bs-heading-color: #f7f3e9; --bs-secondary-color: #b9c6db;
  --bs-tertiary-bg: #152139; --bs-border-color: #33415a;
  --bs-link-color: #94baff; --bs-link-hover-color: #c8dcff;
}
body { background: radial-gradient(ellipse at 90% 10%, #1a2e4b 0, transparent 42%), var(--event-ink); color: var(--event-paper); font-family: Arial, Helvetica, sans-serif; line-height: 1.6; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--event-blue); text-underline-offset: 4px; }
a:hover { color: #d3e3ff; }
h1,h2,h3,h4 { font-weight: 800; letter-spacing: -.035em; }
.navbar.bg-dark { background: rgba(12,20,37,.97) !important; border-bottom: 1px solid var(--event-line); min-height: 74px; }
.navbar-brand { display: flex; align-items: center; gap: 12px; }
.navbar-brand .ctf_logo { width: 36px; height: 36px; object-fit: contain; border-radius: 6px; }
.event-wordmark { font-size: 17px; font-weight: 800; letter-spacing: -.02em; color: var(--event-paper); white-space: nowrap; }
.navbar .nav-link { font-size: 13px; color: #c3cfe3; border-radius: 7px; padding: .55rem .65rem !important; }
.navbar .nav-link:hover,.navbar .nav-link[aria-current="page"] { color: #fff; background: #20304c; }
main { padding-top: 74px; flex: 1; margin-bottom: 0; }
.jumbotron { background: transparent !important; border-bottom: 1px solid var(--event-line); padding: 42px 0 28px; margin-bottom: 32px; }
.jumbotron h1 { font-size: clamp(2.2rem,5vw,3.7rem); }
.event-page-intro { color: var(--event-muted); margin: 10px 0 0; }
.event-auth-card { padding: 32px; background: var(--event-panel); border: 1px solid var(--event-line); border-radius: 18px; box-shadow: 0 20px 60px #0003; }
.form-control,.form-select { background: #0b1424 !important; border: 1px solid #4b5c77 !important; color: var(--event-paper) !important; border-radius: 9px; min-height: 46px; }
.form-control::placeholder { color: #a3b3ca; }
.form-control:focus,.form-select:focus { box-shadow: 0 0 0 3px #94baff38; border-color: var(--event-blue) !important; }
.btn { border-radius: 9px; font-weight: 700; padding: .65rem 1rem; transition: background .15s,transform .15s; }
.btn-primary { background: #2d5fb8 !important; border-color: #4c80dc !important; color: #fff !important; }
.btn-primary:hover { background: #3c70ca !important; }
.btn-outline-secondary,.btn-secondary,.btn-outline-dark { background: #21314d; border-color: #526380; color: var(--event-paper); }
.text-muted,.text-secondary { color: var(--event-muted) !important; }
.category-header h3 { font-size: 1.6rem; display: flex; align-items: center; gap: 12px; }
.category-header h3::before { content: ''; width: 7px; height: 24px; background: var(--event-red); border-radius: 2px; }
.challenge-button.btn { background: var(--event-panel) !important; border: 1px solid var(--event-line) !important; border-radius: 14px; box-shadow: none !important; text-align: left; min-height: 152px; padding: 22px; color: var(--event-paper); }
.challenge-button.btn:hover { border-color: #94baff !important; background: #1c2d4a !important; transform: translateY(-3px); }
.challenge-inner p { font-size: 17px; font-weight: 700; line-height: 1.35; margin-bottom: 18px; }
.challenge-inner span { color: #aac8ff; font-weight: 800; }
.challenge-button.challenge-solved { background: #133631 !important; border-color: #55ad94 !important; }
.modal-content,.card { background: var(--event-panel); border: 1px solid var(--event-line); border-radius: 16px; color: var(--event-paper); }
.modal-header,.modal-footer { border-color: var(--event-line); }
.btn-close { filter: invert(1) grayscale(1); }
.challenge-desc pre,pre { background: #0b1424; color: #e2eafa; border: 1px solid var(--event-line); border-radius: 8px; padding: 14px; }
code { color: #ffb5a9; overflow-wrap: anywhere; }
.table { --bs-table-bg: transparent; --bs-table-color: #f7f3e9; --bs-table-border-color: #33415a; --bs-table-striped-bg: #152139; --bs-table-striped-color: #f7f3e9; --bs-table-hover-bg: #20304c; --bs-table-hover-color: #fff; }
.nav-tabs { border-color: var(--event-line); }
.nav-tabs .nav-link { color: #b9c6db; }
.nav-tabs .nav-link.active { background: var(--event-panel); border-color: var(--event-line); color: #fff; }
.alert { border-radius: 10px; }
.footer { position: static; height: auto; line-height: 1.6; z-index: auto; background: transparent; border-top: 1px solid var(--event-line); padding: 20px 0; margin-top: 64px; }
.event-footer-note { font-size: 12px; letter-spacing: .06em; margin-bottom: 5px; color: var(--event-muted); }
.event-home { padding-top: 28px; }
.event-eyebrow { color: #aac8ff; font: 700 12px/1.5 Arial,sans-serif; letter-spacing: .16em; text-transform: uppercase; }
.event-hero { display: grid; grid-template-columns: 1.35fr 1fr; gap: 48px; align-items: center; padding: 32px 0 48px; }
.event-hero h1 { font-size: clamp(3rem,6vw,5.8rem); line-height: .98; margin: 18px 0 24px; }
.event-hero h1 span { display: block; color: #94baff; }
.event-lead { max-width: 500px; color: var(--event-muted); font-size: 18px; }
.event-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 26px 0; }
.event-small { font-size: 13px; color: var(--event-muted); }
.event-poster { background: var(--event-paper); color: #10203a; padding: 28px; border-radius: 20px; box-shadow: 12px 12px 0 #233c60; transform: rotate(2deg); }
.event-poster img { display: block; width: 100%; max-width: 290px; margin: auto; border-radius: 8px; }
.event-poster-label { border-top: 2px solid #10203a; padding-top: 16px; margin-top: 20px; display: flex; justify-content: space-between; font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.event-stats { display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid var(--event-line); border-radius: 14px; margin: 10px 0 44px; background: #15213999; }
.event-stat { padding: 22px 28px; border-right: 1px solid var(--event-line); }
.event-stat:last-child { border: 0; }
.event-stat strong { font-size: 25px; display: block; }
.event-stat span { color: var(--event-muted); font-size: 13px; }
.event-section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.event-section-heading h2 { margin: 0; font-size: 27px; }
.event-steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.event-step { border: 1px solid var(--event-line); background: var(--event-panel); border-radius: 14px; padding: 24px; }
.event-step-number { color: #94baff; font-size: 12px; font-weight: 800; letter-spacing: .1em; }
.event-step h3 { font-size: 19px; margin: 14px 0 9px; }
.event-step p { color: var(--event-muted); font-size: 14px; margin: 0; }
.event-bottom { display: flex; justify-content: space-between; align-items: center; gap: 24px; border-top: 1px solid var(--event-line); margin-top: 40px; padding: 26px 0; }
.event-bottom p { margin: 0; color: var(--event-muted); font-size: 14px; }
.event-guide { max-width: 960px; margin: auto; padding: 40px 0 10px; }
.event-guide-header { border-bottom: 1px solid var(--event-line); padding-bottom: 12px; margin-bottom: 28px; }
.event-guide-header h1 { font-size: clamp(1.9rem,4vw,2.8rem); margin: 10px 0; }
.event-guide-header .event-actions { margin: 18px 0 12px; }
.event-guide-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.event-guide-panel { padding: 24px; background: var(--event-panel); border: 1px solid var(--event-line); border-radius: 12px; }
.event-guide h2 { font-size: 21px; margin-bottom: 16px; }
.event-guide ul { padding-left: 19px; margin-bottom: 0; }
.event-guide li { color: #c4d0e2; font-size: 14px; margin-bottom: 12px; }
.event-guide li:last-child { margin-bottom: 0; }
.event-guide-tools { margin-top: 30px; }
.event-guide-tools h2 { margin-bottom: 8px; }
.event-tool-links { display: grid; grid-template-columns: repeat(4,1fr); gap: 12px; }
.event-tool-links a { text-decoration: none; padding: 17px; border: 1px solid var(--event-line); border-radius: 10px; }
.event-tool-links a:hover { background: var(--event-panel); border-color: var(--event-blue); }
.event-tool-links strong { display: block; font-size: 15px; margin-bottom: 5px; }
.event-tool-links span { color: var(--event-muted); font-size: 12px; display: block; line-height: 1.5; }
@media(max-width:767px) { .event-guide-columns { grid-template-columns: 1fr; } .event-tool-links { grid-template-columns: 1fr 1fr; } .event-guide { padding-top: 28px; } .event-guide-panel { padding: 20px; } }
:focus-visible { outline: 3px solid #b2cfff; outline-offset: 4px; }
@media(max-width:767px) { .event-hero { grid-template-columns: 1fr; gap: 28px; } .event-poster { transform: none; max-width: 360px; margin: 0 auto; } .event-stats,.event-steps { grid-template-columns: 1fr; } .event-stat { border-right: 0; border-bottom: 1px solid var(--event-line); } .event-auth-card { padding: 22px; } .event-section-heading,.event-bottom { align-items: flex-start; flex-direction: column; gap: 10px; } .event-hero h1 { font-size: 3.4rem; } }
@media(prefers-reduced-motion:reduce) { *,*::before,*::after { transition: none !important; scroll-behavior: auto !important; } }