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

:root {
  --bg: #06070c;
  --ink: #e8ecf4;
  --muted: #8b93a8;
  --blue: #3d8cff;
  --blue-bright: #6eb0ff;
  --blue-dim: #1e3a5f;
  --blue-glow: rgba(61, 140, 255, 0.35);
  --stroke: #1a2332;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  background-image: radial-gradient(ellipse 100% 80% at 50% -20%, rgba(30, 58, 95, 0.35) 0%, transparent 55%);
  overflow-x: hidden;
}

/* --- button-click loader: one blue circle --- */
.action-loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: none;
  place-items: center;
  background: rgba(3, 5, 10, 0.92);
}

.action-loader.is-visible {
  display: grid;
}

.action-loader__spinner {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 3px solid rgba(61, 140, 255, 0.22);
  border-top-color: var(--blue-bright);
  animation: spin 0.75s linear infinite;
  box-shadow: 0 0 28px var(--blue-glow);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --- grain --- */
.grain {
  pointer-events: none;
  position: fixed;
  inset: -50%;
  z-index: 9000;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-shift 8s steps(10) infinite;
}

@keyframes grain-shift {
  0%,
  100% {
    transform: translate(0, 0);
  }
  10% {
    transform: translate(-2%, -3%);
  }
  30% {
    transform: translate(3%, -1%);
  }
  50% {
    transform: translate(-1%, 2%);
  }
  70% {
    transform: translate(2%, 3%);
  }
}

/* --- layout --- */
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--stroke);
  font-size: 0.72rem;
  text-transform: lowercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.top__ver {
  color: var(--blue-dim);
}

.main {
  max-width: 34rem;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  position: relative;
  z-index: 1;
}

.title {
  margin: 0 0 0.6rem;
  line-height: 0.95;
}

.title__line {
  font-family: "Archivo Black", sans-serif;
  font-size: clamp(3.2rem, 14vw, 5.2rem);
  letter-spacing: -0.02em;
  color: var(--ink);
  display: inline-block;
  text-shadow:
    3px 0 0 var(--blue-dim),
    -2px 0 0 var(--blue-glow);
  transform: rotate(-1deg);
}

.tag {
  margin: 0 0 2.25rem;
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.btn {
  font-family: inherit;
  cursor: pointer;
}

.btn--outline {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--blue-bright);
  background: transparent;
  border: 1px solid var(--blue);
  border-radius: 2px;
  transition: border-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.btn--outline:hover {
  border-color: var(--blue-bright);
  color: var(--ink);
  box-shadow: 0 0 18px var(--blue-glow);
}

.btn--outline:focus-visible {
  outline: 2px solid var(--blue-bright);
  outline-offset: 3px;
}

.foot {
  text-align: center;
  padding: 2rem 1rem 2.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: lowercase;
  color: var(--blue-dim);
  border-top: 1px solid var(--stroke);
  position: relative;
  z-index: 1;
}

/* --- modal --- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 8000;
  display: grid;
  place-items: center;
  padding: 1.25rem;
}

.modal[hidden] {
  display: none;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 4, 10, 0.75);
  backdrop-filter: blur(4px);
}

.modal__box {
  position: relative;
  width: 100%;
  max-width: 26rem;
  padding: 1.5rem 1.35rem 1.35rem;
  border: 1px solid var(--stroke);
  border-left: 3px solid var(--blue);
  background: linear-gradient(160deg, rgba(30, 58, 95, 0.2) 0%, var(--bg) 45%);
  box-shadow:
    0 0 0 1px rgba(61, 140, 255, 0.12),
    6px 8px 24px rgba(0, 0, 0, 0.45);
  transform: rotate(0.35deg);
}

.modal__close {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  width: 2rem;
  height: 2rem;
  padding: 0;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.modal__close:hover {
  color: var(--blue-bright);
  border-color: var(--blue-dim);
}

.modal__title {
  margin: 0 2rem 0.75rem 0;
  font-family: "Archivo Black", sans-serif;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue-bright);
}

.modal__body {
  margin: 0;
  font-size: 0.88rem;
  color: #b8c0d4;
  line-height: 1.65;
}

.modal__body p {
  margin: 0 0 0.75rem;
}

.modal__body p:last-child {
  margin-bottom: 0;
}

.modal__free {
  font-family: "Archivo Black", sans-serif;
  font-size: 1.15rem;
  color: var(--ink);
  letter-spacing: 0.02em;
  margin-bottom: 0.35rem;
}

.modal__velocity {
  margin: 0;
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.03em;
}

.top__back {
  color: var(--blue-bright);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.top__back:hover {
  border-color: var(--blue);
  color: var(--ink);
}

.main--wide {
  max-width: 48rem;
}

.page-title {
  margin: 0 0 0.5rem;
  font-family: "Archivo Black", sans-serif;
  font-size: clamp(1.75rem, 6vw, 2.35rem);
  letter-spacing: 0.02em;
  color: var(--ink);
  text-shadow:
    2px 0 0 var(--blue-dim),
    -1px 0 0 var(--blue-glow);
}

.dl-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.75rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .dl-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.dl-card {
  display: flex;
  flex-direction: column;
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--stroke);
  border-left: 3px solid var(--blue);
  background: linear-gradient(165deg, rgba(30, 58, 95, 0.18) 0%, var(--bg) 50%);
  box-shadow: 4px 6px 20px rgba(0, 0, 0, 0.35);
}

.dl-card__title {
  margin: 0 0 0.5rem;
  font-family: "Archivo Black", sans-serif;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-bright);
}

.dl-card__text {
  margin: 0 0 1.1rem;
  flex: 1;
  font-size: 0.84rem;
  color: #b8c0d4;
  line-height: 1.6;
}

.dl-preview {
  margin: 0 0 1rem;
  padding: 0;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--stroke);
  background: #0a0c11;
  box-shadow:
    inset 0 0 0 1px rgba(61, 140, 255, 0.07),
    0 4px 16px rgba(0, 0, 0, 0.35);
}

.dl-preview img {
  width: 100%;
  height: auto;
  display: block;
  vertical-align: top;
}

a.btn--outline {
  text-align: center;
  align-self: flex-start;
}