:root {
  --bg-deep: #101010;
  --bg-card: rgba(8, 14, 10, 0.92);
  --matrix-green: #00ff41;
  --matrix-dim: #00aa44;
  --matrix-muted: rgba(0, 255, 65, 0.12);
  --text: #c8f0cc;
  --text-bright: #e8ffe8;
  --border-glow: rgba(0, 255, 100, 0.35);
  --btn-op-start: #002211;
  --btn-op-end: #004422;
  --btn-chat-start: #0a1a12;
  --btn-chat-end: #103020;
  --btn-main-start: #003318;
  --btn-main-end: #006633;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "JetBrains Mono", "Share Tech Mono", "Fira Code", Consolas, monospace;
  color: var(--text);
  min-height: 100vh;
  background-color: var(--bg-deep);
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='80' viewBox='0 0 160 80'%3E%3Ctext x='0' y='10' fill='rgba(0,255,65,0.08)' font-family='monospace' font-size='9'%3E1010101010101010%3C/text%3E%3Ctext x='0' y='24' fill='rgba(0,255,65,0.06)' font-family='monospace' font-size='9'%3E0101010101010101%3C/text%3E%3Ctext x='0' y='38' fill='rgba(0,255,65,0.07)' font-family='monospace' font-size='9'%3E1010101010101010%3C/text%3E%3Ctext x='0' y='52' fill='rgba(0,255,65,0.05)' font-family='monospace' font-size='9'%3E0101010101010101%3C/text%3E%3Ctext x='80' y='66' fill='rgba(0,255,65,0.06)' font-family='monospace' font-size='9'%3E10101010%3C/text%3E%3C/svg%3E"),
    linear-gradient(rgba(0, 255, 65, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 65, 0.035) 1px, transparent 1px),
    radial-gradient(ellipse 70% 45% at 50% -10%, rgba(0, 255, 100, 0.07), transparent);
  background-size: 160px 80px, 24px 24px, 24px 24px, 100% 100%;
  background-position: 0 0, 0 0, 0 0, center top;
}

.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  position: relative;
}

.card {
  width: min(760px, 100%);
  padding: 36px 28px;
  border-radius: 4px;
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-glow);
  box-shadow:
    0 0 0 1px rgba(0, 255, 100, 0.08),
    0 0 40px rgba(0, 255, 65, 0.06),
    inset 0 1px 0 rgba(0, 255, 100, 0.12);
}

.logo {
  margin: 0 0 12px;
  font-size: clamp(24px, 5vw, 38px);
  font-weight: 700;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--matrix-green);
  text-align: right;
  text-shadow:
    0 0 20px rgba(0, 255, 65, 0.5),
    0 0 40px rgba(0, 255, 65, 0.2);
}

.badge {
  margin: 0 0 10px;
  display: inline-block;
  padding: 6px 12px;
  border-radius: 2px;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--matrix-dim);
  background: rgba(0, 255, 65, 0.08);
  border: 1px solid var(--matrix-muted);
}

h1 {
  margin: 0;
  font-size: clamp(22px, 4vw, 36px);
  line-height: 1.2;
  color: var(--text-bright);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.tagline {
  margin: 8px 0 0;
  font-size: clamp(15px, 2.5vw, 18px);
  font-weight: 600;
  color: var(--matrix-green);
  letter-spacing: 0.04em;
  text-shadow: 0 0 12px rgba(0, 255, 65, 0.35);
}

.subtitle {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.55;
  opacity: 0.85;
  color: var(--text);
}

.buttons {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.chat-channel-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}

.button-stack .buttons {
  margin-top: 8px;
}

.buttons-stack {
  grid-template-columns: 1fr;
}

.stack-label {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--matrix-dim);
}

.section + .section {
  margin-top: 22px;
}

.section-title {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--matrix-dim);
}

.btn {
  text-decoration: none;
  text-align: center;
  padding: 13px 16px;
  border-radius: 2px;
  color: var(--matrix-green);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.06em;
  background: linear-gradient(180deg, var(--btn-chat-start), var(--btn-chat-end));
  border: 1px solid rgba(0, 255, 100, 0.35);
  box-shadow:
    0 0 15px rgba(0, 255, 65, 0.08),
    inset 0 1px 0 rgba(0, 255, 100, 0.1);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn-main {
  background: linear-gradient(180deg, var(--btn-main-start), var(--btn-main-end));
  border-color: rgba(0, 255, 100, 0.55);
  color: #b8ffc8;
  box-shadow:
    0 0 20px rgba(0, 255, 65, 0.15),
    inset 0 1px 0 rgba(0, 255, 100, 0.15);
}

.btn-operator {
  background: linear-gradient(180deg, var(--btn-op-start), var(--btn-op-end));
  border-color: rgba(0, 170, 68, 0.45);
  color: #7fff9a;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: var(--matrix-green);
  box-shadow:
    0 0 24px rgba(0, 255, 65, 0.2),
    inset 0 1px 0 rgba(0, 255, 100, 0.18);
  color: #e8ffe8;
}

.btn:active {
  transform: translateY(0);
}

.admin-form {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.admin-input {
  width: 100%;
  border: 1px solid rgba(0, 255, 100, 0.25);
  border-radius: 2px;
  padding: 11px 12px;
  font-size: 13px;
  font-family: inherit;
  background: rgba(0, 20, 10, 0.6);
  color: var(--text-bright);
}

.admin-input::placeholder {
  color: rgba(0, 255, 100, 0.35);
}

.admin-input:focus {
  outline: none;
  border-color: var(--matrix-green);
  box-shadow: 0 0 12px rgba(0, 255, 65, 0.15);
}

.setting-row {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px dashed rgba(0, 255, 100, 0.15);
}

.setting-row label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--matrix-dim);
}

.admin-error {
  margin: 0;
  color: #ff6b6b;
  font-weight: 600;
  font-size: 13px;
}

.admin-success {
  margin: 0;
  color: var(--matrix-green);
  font-weight: 600;
  font-size: 13px;
}

.hidden {
  display: none;
}

@media (max-width: 480px) {
  .card {
    padding: 24px 18px;
  }

  .logo {
    letter-spacing: 0.2em;
  }

  .chat-channel-grid {
    grid-template-columns: 1fr;
  }
}