/* ============================================================
   study hall — rough clone of raid.nyc layout
   Dark animated hero on top, black-on-white event list below.
   Substitutes: Inter (≈ PP Neue Montreal), JetBrains Mono for labels.
   ============================================================ */

:root {
  --ink: #0b0b0c;
  --paper: #ffffff;
  --muted: #6b6b70;
  --hairline: #e6e6e8;
  --accent: #111;
  --red: #e2231a;
  --max: 1080px;
  --pad: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: opacity 0.15s ease;
}
a:hover { opacity: 0.55; }

/* ============================ HERO ============================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background: #040406;
  color: #fff;
  padding: var(--pad);
  cursor: crosshair;
}

/* event-photo collage, dimmed into a moody backdrop */
.hero__photo {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: #040406 url("img/hero.webp") center / cover no-repeat;
  filter: grayscale(0.08) brightness(0.56) contrast(1.08) saturate(1.3);
}

/* flow field — screen-blended so only the bright lines show over the photo */
.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 1;
  mix-blend-mode: screen;
}

/* animated film grain */
.hero::before {
  content: "";
  position: absolute;
  inset: -60%;
  z-index: 2;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 160px 160px;
  opacity: 0.09;
  mix-blend-mode: screen;
  animation: grain 0.5s steps(5) infinite;
}

@keyframes grain {
  0%   { transform: translate(0, 0); }
  20%  { transform: translate(-4%, 3%); }
  40%  { transform: translate(3%, -4%); }
  60%  { transform: translate(-3%, -3%); }
  80%  { transform: translate(4%, 4%); }
  100% { transform: translate(0, 0); }
}

/* scanlines + vignette — CRT in a dark room */
.hero__veil {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      0deg,
      rgba(0, 0, 0, 0) 0px,
      rgba(0, 0, 0, 0) 2px,
      rgba(0, 0, 0, 0.18) 3px,
      rgba(0, 0, 0, 0.18) 3px
    ),
    radial-gradient(140% 105% at 50% 42%, transparent 44%, rgba(0, 0, 0, 0.78) 100%);
}

.wordmark {
  position: relative;
  z-index: 4;
  margin: 0 auto;
  pointer-events: none;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 0.9;
  font-size: clamp(56px, 15vw, 200px);
  text-align: center;
  color: #cdd2da;
  text-shadow:
    0.016em 0 rgba(255, 36, 92, 0.5),
    -0.016em 0 rgba(0, 224, 255, 0.45);
  animation:
    wm-in 1.2s cubic-bezier(0.16, 1, 0.3, 1) both,
    glitch 7s steps(1, end) 1.3s infinite;
}

/* occasional chromatic-aberration twitch */
@keyframes glitch {
  0%, 90%, 100% {
    transform: none;
    text-shadow: 0.016em 0 rgba(255, 36, 92, 0.5), -0.016em 0 rgba(0, 224, 255, 0.45);
  }
  91% {
    transform: translateX(-2px);
    text-shadow: 0.05em 0 rgba(255, 36, 92, 0.75), -0.045em 0 rgba(0, 224, 255, 0.65);
  }
  92% { transform: translateX(3px); }
  93% {
    transform: translateX(-1px);
    text-shadow: -0.035em 0 rgba(255, 36, 92, 0.6), 0.035em 0 rgba(0, 224, 255, 0.55);
  }
  94% { transform: none; }
}

@keyframes wm-in {
  from { opacity: 0; transform: translateY(16px); filter: blur(8px); }
  to   { opacity: 1; transform: none; filter: none; }
}

.hero__foot {
  position: relative;
  z-index: 4;
  cursor: auto;
  width: 100%;
  max-width: var(--max);
  margin-top: auto;
  padding-top: 12vh;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(24px, 5vw, 64px);
  align-items: end;
}

.intro {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.8);
  max-width: 46ch;
}
.intro a { color: #fff; border-bottom-color: rgba(255, 255, 255, 0.5); }

/* email capture */
.signup { width: 100%; }
.signup__label {
  display: block;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 10px;
}
.signup__row {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  padding-bottom: 8px;
}
.signup__input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  color: #fff;
  font: inherit;
  font-size: 15px;
  outline: none;
}
.signup__input::placeholder { color: rgba(255, 255, 255, 0.4); }
.signup__btn {
  background: #fff;
  color: #05060a;
  border: 0;
  border-radius: 999px;
  padding: 7px 18px;
  font: inherit;
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.12s ease, opacity 0.15s ease;
}
.signup__btn:hover { transform: translateY(-1px); opacity: 0.9; }
.signup__msg {
  min-height: 1.2em;
  margin: 10px 0 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
}
.signup__msg.is-error { color: #ffb3c1; }

/* ============================ PAGE ============================ */
.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(48px, 9vw, 120px) var(--pad);
  font-family: "Helvetica Neue", Helvetica, Arial, "Inter", sans-serif;
}

.section-title {
  margin: 0 0 clamp(36px, 7vw, 80px);
  font-size: clamp(44px, 11vw, 132px);
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}
.section-title .dot { color: var(--red); }

/* ============================ EVENT LIST ============================ */
.event-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.ev {
  position: relative;
  padding: clamp(40px, 6vw, 72px) 0;
  border-top: 2px solid var(--ink);
}
.ev:last-child { border-bottom: 2px solid var(--ink); }

.ev-num {
  font-size: clamp(78px, 13vw, 158px);
  font-weight: 800;
  line-height: 0.74;
  letter-spacing: -0.05em;
  color: var(--red);
  margin-bottom: -0.12em;
  position: relative;
  z-index: 0;
}

.ev-main {
  position: relative;
  z-index: 1;
  margin-left: 6%;
  max-width: 58ch;
}

.ev-badge {
  display: inline-block;
  background: var(--red);
  color: #fff;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 9px;
  margin-bottom: 12px;
}

.ev-title {
  display: block;
  width: fit-content;
  font-size: clamp(26px, 4.4vw, 52px);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.025em;
  line-height: 0.94;
  color: var(--ink);
  border: 0;
}
.ev-title:hover { color: var(--red); opacity: 1; }

.ev-lede {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.5;
  color: #2c2c30;
}

.ev-rsvp {
  display: inline-block;
  margin-top: 16px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 14px;
  color: var(--red);
  border: 0;
}
.ev-rsvp:hover { opacity: 0.6; }

.ev-people { list-style: none; margin: 16px 0 0; padding: 0; font-size: 14px; }
.ev-people li { margin-bottom: 2px; }
.ev-name { font-weight: 700; }
.ev-what { color: var(--muted); }

.ev-side {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 5vw, 56px);
  margin: 22px 0 0 6%;
}
.ev-meta { font-size: 14px; }
.ev-label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2px;
}
.ev-date { font-variant-numeric: tabular-nums; }

/* broken rhythm — shove every other entry across the grid */
.ev:nth-child(even) .ev-num { text-align: right; }
.ev:nth-child(even) .ev-main { margin-left: 34%; }
.ev:nth-child(even) .ev-side { margin-left: 34%; }

/* ============================ FOOTER ============================ */
.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 40px var(--pad) 64px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--hairline);
  font-size: 13px;
  color: var(--muted);
}
.footer__credit { font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 12px; }

/* ============================ RESPONSIVE ============================ */
@media (max-width: 720px) {
  .hero__foot { grid-template-columns: 1fr; gap: 28px; }

  .ev { padding: 26px 0; border-top: 1px solid var(--ink); }
  .ev:last-child { border-bottom: 1px solid var(--ink); }
  .ev-num {
    font-size: 32px;
    line-height: 1;
    margin-bottom: 8px;
    text-align: left;
  }
  .ev-main,
  .ev-side { margin-left: 0; max-width: none; }
  .ev:nth-child(even) .ev-num { text-align: left; }
  .ev:nth-child(even) .ev-main,
  .ev:nth-child(even) .ev-side { margin-left: 0; }
  .ev-title { font-size: 22px; }
  .ev-lede { font-size: 15px; }
  .ev-side { margin-top: 16px; gap: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .wordmark { animation: none; }
  .hero::before { animation: none; }
}