/* ============================================================================
   CYBERFOXES CTF 2026 "CORRUPTED RENAISSANCE"
   A registration platform where Mannerist marble is eaten by the digital.
   ========================================================================== */

/* ----------  Design tokens  ---------- */
:root {
  --void:        #0c0a0f;
  --void-2:      #141019;
  --ink:         #1b1620;
  --ivory:       #ece3d0;
  --ivory-dim:   #b9ad95;
  --marble:      #d8ccb2;
  --oxblood:     #7a171c;
  --oxblood-lt:  #a5232a;
  --gold:        #c49e4a;
  --gold-lt:     #e6c877;
  --cyan:        #16e0dc;
  --magenta:     #e81884;
  --green:       #58ff9b;

  --serif-display: 'Cinzel', 'Times New Roman', serif;
  --serif-body:    'EB Garamond', Georgia, serif;
  --mono:          'Space Mono', 'Courier New', monospace;

  --edge: 1px solid rgba(196,158,74,0.35);
  --shadow-deep: 0 24px 60px rgba(0,0,0,0.6);

  --cursor:  url('../img/cursor.png') 2 2, auto;
  --cursor-p: url('../img/cursor-pointer.png') 14 6, pointer;
}

/* ----------  Reset-ish  ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--serif-body);
  font-size: 19px;
  line-height: 1.6;
  color: var(--ivory);
  background: var(--void);
  cursor: var(--cursor);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* The custom cursor everywhere, incl. interactive elements */
a, button, input, textarea, select, label, summary,
.pill, .cat-card, .rot-stage { cursor: var(--cursor-p); }

/* ----------  Layered corrupted backdrop  ---------- */
body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
/* marble + oxblood wash */
body::before {
  background:
    radial-gradient(1200px 700px at 80% -10%, rgba(122,23,28,0.35), transparent 60%),
    radial-gradient(900px 600px at 0% 110%, rgba(196,158,74,0.14), transparent 60%),
    url('../img/marble_dark.png');
  background-size: auto, auto, 900px 900px;
  background-blend-mode: normal, normal, luminosity;
  opacity: 0.9;
}
/* scanlines + grain + vignette */
body::after {
  background:
    url('../img/scanlines.png') repeat,
    url('../img/noise.png') repeat,
    radial-gradient(120% 120% at 50% 40%, transparent 55%, rgba(0,0,0,0.65) 100%);
  background-size: 4px 4px, 180px 180px, cover;
  opacity: 0.5;
  mix-blend-mode: overlay;
  animation: grainShift 0.6s steps(3) infinite;
}
@keyframes grainShift {
  0%   { transform: translate(0,0); }
  33%  { transform: translate(-2%, 1%); }
  66%  { transform: translate(1%, -2%); }
  100% { transform: translate(0,0); }
}

/* occasional full-screen glitch tear */
.screen-tear {
  position: fixed; inset: 0; z-index: 60; pointer-events: none;
  background: repeating-linear-gradient(
    to bottom, transparent 0 6px, rgba(22,224,220,0.05) 6px 7px);
  mix-blend-mode: screen; opacity: 0;
  animation: tear 9s infinite;
}
@keyframes tear {
  0%, 96%, 100% { opacity: 0; transform: translateY(0); }
  97% { opacity: 0.9; transform: translateY(-4px) scaleX(1.01); }
  98% { opacity: 0.2; transform: translateY(6px); }
  99% { opacity: 0.7; transform: translateY(-2px); }
}

main, header, footer, .overlay-inner { position: relative; z-index: 1; }

/* ----------  Typographic system  ---------- */
h1, h2, h3, .display {
  font-family: var(--serif-display);
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.08;
  margin: 0 0 0.4em;
}
p { margin: 0 0 1em; }
a { color: var(--gold-lt); text-decoration: none; border-bottom: 1px dotted rgba(230,200,119,0.5); }
a:hover { color: var(--cyan); }
.mono { font-family: var(--mono); letter-spacing: 0.02em; }
.dim { color: var(--ivory-dim); }

/* ----------  Glitch text  ---------- */
.glitch {
  position: relative;
  color: var(--ivory);
  text-shadow: 0 0 1px rgba(255,255,255,0.2);
}
.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute; left: 0; top: 0;
  width: 100%; overflow: hidden;
  clip-path: inset(0 0 0 0);
}
.glitch::before { color: var(--cyan);   transform: translate(-2px,0); mix-blend-mode: screen;
  animation: gl-1 3.6s infinite steps(2); }
.glitch::after  { color: var(--magenta);transform: translate(2px,0);  mix-blend-mode: screen;
  animation: gl-2 2.9s infinite steps(2); }
@keyframes gl-1 {
  0%,92%,100% { clip-path: inset(0 0 100% 0); transform: translate(-2px,0); }
  93% { clip-path: inset(10% 0 60% 0); transform: translate(-6px,-1px); }
  95% { clip-path: inset(70% 0 10% 0); transform: translate(-3px,1px); }
  97% { clip-path: inset(30% 0 40% 0); transform: translate(-8px,0); }
}
@keyframes gl-2 {
  0%,90%,100% { clip-path: inset(100% 0 0 0); transform: translate(2px,0); }
  91% { clip-path: inset(60% 0 20% 0); transform: translate(6px,1px); }
  94% { clip-path: inset(20% 0 60% 0); transform: translate(3px,-1px); }
  98% { clip-path: inset(40% 0 30% 0); transform: translate(8px,0); }
}

/* ----------  Layout shells  ---------- */
.wrap { width: min(1120px, 92vw); margin: 0 auto; }
section { padding: clamp(48px, 8vw, 110px) 0; }
.rule {
  height: 1px; border: 0;
  background: linear-gradient(90deg, transparent, var(--gold) 20%, var(--oxblood-lt) 50%, var(--gold) 80%, transparent);
  opacity: 0.6; margin: 0;
}
.eyebrow {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.42em;
  text-transform: uppercase; color: var(--gold); margin-bottom: 1.2em;
}

/* ----------  Top bar  ---------- */
header.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(16px,4vw,40px);
  background: linear-gradient(180deg, rgba(12,10,15,0.92), rgba(12,10,15,0.55));
  backdrop-filter: blur(6px);
  border-bottom: var(--edge);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { width: 34px; height: 34px; image-rendering: pixelated; }
.brand b { font-family: var(--serif-display); letter-spacing: 0.22em; font-size: 0.98rem; }
.brand b span { color: var(--oxblood-lt); }
.topbar nav { display: flex; gap: 22px; font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.16em; text-transform: uppercase; }
.topbar nav a { border: 0; color: var(--ivory-dim); }
.topbar nav a:hover { color: var(--cyan); }

/* ----------  Hero  ---------- */
.hero { text-align: center; padding-top: clamp(40px,7vw,90px); }
.hero .kicker { font-family: var(--mono); color: var(--gold); letter-spacing: 0.5em; font-size: 0.8rem; text-transform: uppercase; }
.hero h1 {
  font-size: clamp(2.8rem, 9vw, 6.6rem);
  margin: 0.25em 0 0.1em;
  background: linear-gradient(180deg, var(--ivory), var(--ivory-dim) 70%, #8c8069);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .sub { font-size: clamp(1.05rem, 2.4vw, 1.5rem); color: var(--marble); font-style: italic; }
.hero .datebar {
  display: inline-flex; flex-wrap: wrap; gap: 10px 26px; justify-content: center;
  margin-top: 26px; font-family: var(--mono); font-size: 0.82rem; letter-spacing: 0.14em;
  color: var(--ivory);
}
.hero .datebar span { border: var(--edge); padding: 8px 16px; background: rgba(20,16,25,0.55); }
.hero .datebar b { color: var(--gold-lt); }

.cta-row { margin-top: 40px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ----------  Buttons  ---------- */
.btn {
  --bg: var(--oxblood);
  position: relative; display: inline-block;
  font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.22em; font-size: 0.8rem;
  color: var(--ivory); padding: 16px 30px; border: 1px solid var(--gold);
  background: linear-gradient(180deg, rgba(165,35,42,0.9), rgba(122,23,28,0.9));
  overflow: hidden; transition: transform 0.12s ease; border-radius: 0;
}
.btn.ghost { background: rgba(20,16,25,0.6); border-color: rgba(196,158,74,0.5); }
.btn::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(22,224,220,0.25), transparent);
  transform: translateX(-120%);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px var(--cyan), 6px 6px 0 rgba(232,24,132,0.5), -6px -6px 0 rgba(22,224,220,0.4); }
.btn:hover::after { animation: sweep 0.7s ease; }
.btn:active { transform: translateY(0); }
@keyframes sweep { to { transform: translateX(120%); } }

/* ----------  Ornamented panel  ---------- */
.panel {
  position: relative;
  background:
    linear-gradient(180deg, rgba(24,19,30,0.92), rgba(14,11,18,0.96)),
    url('../img/marble_dark.png');
  background-size: cover, 700px 700px;
  background-blend-mode: normal, overlay;
  border: var(--edge);
  box-shadow: var(--shadow-deep), inset 0 0 60px rgba(0,0,0,0.6);
  padding: clamp(24px, 4vw, 52px);
}
.panel::before, .panel::after {
  content: ""; position: absolute; width: 22px; height: 22px; border: 2px solid var(--gold);
}
.panel::before { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.panel::after  { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }

/* ----------  Categories grid  ---------- */
.cat-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px,1fr));
  gap: 16px; margin-top: 28px;
}
.cat-card {
  position: relative; padding: 22px 20px 20px; border: 1px solid rgba(196,158,74,0.28);
  background: linear-gradient(180deg, rgba(26,20,33,0.85), rgba(14,11,18,0.9));
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  overflow: hidden;
}
.cat-card .idx { font-family: var(--mono); color: var(--oxblood-lt); font-size: 0.72rem; letter-spacing: 0.2em; }
.cat-card h3 { font-size: 1.18rem; margin: 6px 0 6px; color: var(--ivory); }
.cat-card p { font-size: 0.92rem; color: var(--ivory-dim); margin: 0; }
.cat-card::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--magenta)); transform: scaleX(0); transform-origin: left;
  transition: transform 0.25s;
}
.cat-card:hover { transform: translateY(-4px); border-color: var(--gold); box-shadow: -5px 5px 0 rgba(232,24,132,0.25), 5px -5px 0 rgba(22,224,220,0.2); }
.cat-card:hover::after { transform: scaleX(1); }
.cat-card:hover h3 { text-shadow: -2px 0 var(--cyan), 2px 0 var(--magenta); }

/* ----------  Registration form  ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 26px; margin-top: 8px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.col-2 { grid-column: 1 / -1; }
.field label {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--gold);
}
.field label .req { color: var(--oxblood-lt); }
.field input {
  font-family: var(--serif-body); font-size: 1.05rem; color: var(--ivory);
  padding: 13px 15px; background: rgba(10,8,13,0.75);
  border: 1px solid rgba(196,158,74,0.3); border-radius: 0; outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input::placeholder { color: rgba(185,173,149,0.4); font-style: italic; }
.field input:focus {
  border-color: var(--cyan);
  box-shadow: -3px 0 0 rgba(232,24,132,0.5), 3px 0 0 rgba(22,224,220,0.5);
}
.field input:invalid:not(:placeholder-shown) { border-color: var(--oxblood-lt); }
.field .hint { font-size: 0.8rem; color: var(--ivory-dim); font-style: italic; }
.field .err { font-family: var(--mono); font-size: 0.72rem; color: var(--magenta); min-height: 1em; }

/* consent block */
.consent { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 14px; margin-top: 6px; }
.check {
  display: grid; grid-template-columns: 26px 1fr; gap: 12px; align-items: start;
  font-size: 0.95rem; color: var(--ivory-dim);
}
.check input { appearance: none; width: 22px; height: 22px; margin-top: 3px;
  border: 1px solid var(--gold); background: rgba(10,8,13,0.8); position: relative; }
.check input:checked { background: var(--oxblood); box-shadow: inset 0 0 0 2px var(--void); }
.check input:checked::after {
  content: "✓"; position: absolute; inset: 0; display: grid; place-items: center;
  color: var(--gold-lt); font-family: var(--mono); font-size: 0.9rem;
  text-shadow: -1px 0 var(--cyan), 1px 0 var(--magenta);
}
.check a { white-space: nowrap; }

.form-foot { grid-column: 1/-1; display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 10px; flex-wrap: wrap; }
.form-status { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.1em; min-height: 1.2em; }
.form-status.err { color: var(--magenta); }
.form-status.ok  { color: var(--green); }
.btn[disabled] { opacity: 0.5; pointer-events: none; }

/* ----------  Rotating David success overlay  ---------- */
.overlay {
  position: fixed; inset: 0; z-index: 80; display: none;
  place-items: center; text-align: center;
  background: radial-gradient(120% 120% at 50% 30%, rgba(20,16,25,0.86), rgba(6,5,8,0.98));
  backdrop-filter: blur(10px);
}
.overlay.show { display: grid; animation: fadeIn 0.6s ease both; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.overlay-inner { width: min(680px, 92vw); padding: 24px; }

.rot-stage {
  width: min(360px, 74vw); aspect-ratio: 400/560; margin: 0 auto 8px;
  perspective: 1200px;
}
.rot-david {
  width: 100%; height: 100%; transform-style: preserve-3d;
  animation: spinY 8s linear infinite, chroma 2.6s steps(8) infinite;
}
.rot-david .face {
  position: absolute; inset: 0; width: 100%; height: 100%;
  backface-visibility: hidden;
  filter: drop-shadow(0 26px 34px rgba(0,0,0,0.7));
}
.rot-david .face.back { transform: rotateY(180deg); }
@keyframes spinY {
  0%   { transform: rotateY(0deg); }
  100% { transform: rotateY(360deg); }
}
/* chromatic aberration that pulses like a failing signal */
@keyframes chroma {
  0%, 78%, 100% { filter: drop-shadow(1px 0 rgba(232,24,132,0.5)) drop-shadow(-1px 0 rgba(22,224,220,0.5)); }
  82% { filter: drop-shadow(6px 0 rgba(232,24,132,0.8)) drop-shadow(-6px 2px rgba(22,224,220,0.8)); }
  88% { filter: drop-shadow(-5px 1px rgba(232,24,132,0.8)) drop-shadow(5px -2px rgba(22,224,220,0.8)); }
  94% { filter: drop-shadow(3px 0 rgba(232,24,132,0.7)) drop-shadow(-3px 0 rgba(22,224,220,0.7)); }
}
.overlay .tag { font-family: var(--mono); letter-spacing: 0.4em; text-transform: uppercase; color: var(--gold); font-size: 0.72rem; }
.overlay h2 { font-size: clamp(1.6rem, 5vw, 2.7rem); margin: 14px 0 6px; }
.overlay .codename { color: var(--cyan); font-style: italic; }
.overlay .wait {
  margin-top: 18px; font-size: 1.02rem; color: var(--marble); line-height: 1.7;
}
.overlay .wait b { color: var(--gold-lt); font-family: var(--mono); font-size: 0.9rem; letter-spacing: 0.04em; }
.overlay .mail { display: inline-block; margin: 4px 6px; padding: 4px 10px; border: var(--edge); background: rgba(20,16,25,0.6); font-family: var(--mono); font-size: 0.82rem; }
.overlay .backline { margin-top: 26px; }

/* ----------  Legal pages  ---------- */
.legal {
  background:
    linear-gradient(180deg, rgba(238,228,202,0.96), rgba(226,214,184,0.96)),
    url('../img/parchment.png');
  background-size: cover, 900px 900px; background-blend-mode: multiply;
  color: #2a2018; border: 3px double #6f5a34;
  padding: clamp(28px, 5vw, 70px); box-shadow: var(--shadow-deep);
}
.legal * { cursor: var(--cursor); }
.legal a { cursor: var(--cursor-p); }
.legal h1 { color: #4a1518; font-size: clamp(2rem,5vw,3rem); }
.legal h2 { color: #5a1a1e; margin-top: 1.6em; font-size: 1.35rem; border-bottom: 1px solid rgba(90,26,30,0.3); padding-bottom: 0.2em; }
.legal h3 { color: #6a3510; margin-top: 1.2em; font-size: 1.08rem; font-family: var(--serif-display); }
.legal p, .legal li { color: #2a2018; font-size: 1.02rem; }
.legal ul, .legal ol { padding-left: 1.4em; }
.legal li { margin-bottom: 0.5em; }
.legal .lead { font-size: 1.12rem; font-style: italic; color: #4a3320; }
.legal .meta { font-family: var(--mono); font-size: 0.78rem; color: #6a4a24; letter-spacing: 0.06em; }
.legal .callout { border-left: 4px solid var(--oxblood); background: rgba(122,23,28,0.06); padding: 14px 18px; margin: 18px 0; }
.legal .toc { columns: 2; column-gap: 30px; font-family: var(--mono); font-size: 0.82rem; }
.legal .toc a { color: #5a1a1e; }
.legal-head { display:flex; justify-content: space-between; align-items:baseline; flex-wrap: wrap; gap: 10px; }

/* corrupt glyph seam over parchment */
.legal .seam { height: 26px; background: url('../img/glitch_strip.png'); background-size: cover; opacity: 0.5; margin: 26px 0; }

/* ----------  Footer  ---------- */
footer.foot {
  border-top: var(--edge); padding: 40px 0 60px; margin-top: 40px;
  text-align: center; color: var(--ivory-dim); font-size: 0.9rem;
}
footer.foot .glitch-strip { height: 30px; background: url('../img/glitch_strip.png'); background-size: cover; opacity: 0.6; margin-bottom: 26px; }
footer.foot a { color: var(--gold-lt); }
footer.foot .mono { font-size: 0.72rem; letter-spacing: 0.2em; }

/* ----------  Section headings  ---------- */
.sec-head { display: flex; align-items: baseline; gap: 18px; }
.sec-head .num { font-family: var(--mono); color: var(--oxblood-lt); font-size: 0.9rem; }
.sec-head h2 { font-size: clamp(1.7rem, 4vw, 2.6rem); }

/* ----------  Responsive  ---------- */
@media (max-width: 720px) {
  .form-grid { grid-template-columns: 1fr; }
  .legal .toc { columns: 1; }
  .topbar nav { display: none; }
  body { font-size: 17px; }
}

/* ----------  Reduced motion  ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; }
  .rot-david { animation: none !important; }
}