*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:        #050507;
  --bg-card:   #0a0a0f;
  --bg-oss:    #07070c;
  --accent:    #1a6ecc;
  --accent-h:  #2e84e8;
  --text:      #e8e8f0;
  --muted:     #888899;
  --border:    #141428;
  --radius:    12px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent-h); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ─────────────────────────────────────── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(5, 5, 7, 0.92);
  backdrop-filter: blur(10px);
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text);
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

/* ── Buttons ─────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-h);
  text-decoration: none;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: var(--bg-card);
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  font-weight: 500;
}
.btn-ghost:hover {
  color: var(--text);
  text-decoration: none;
}

/* ── Hero ────────────────────────────────────── */
.hero {
  display: flex;
  justify-content: center;
  padding: 6rem 2rem 5rem;
  text-align: center;
}

.hero-inner {
  max-width: 680px;
}

.badge {
  display: inline-block;
  background: rgba(26, 110, 204, 0.12);
  color: var(--accent-h);
  border: 1px solid rgba(26, 110, 204, 0.35);
  border-radius: 100px;
  padding: 0.3rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 1.25rem;
}

.accent { color: var(--accent-h); }

.tagline {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 540px;
  margin: 0 auto 2.5rem;
}

.cta-row {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-row .btn {
  padding: 0.75rem 1.6rem;
  font-size: 1rem;
}

/* ── Features ────────────────────────────────── */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: rgba(26, 110, 204, 0.45);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ── Open Source ─────────────────────────────── */
.oss {
  background: var(--bg-oss);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 4rem 2rem;
}

.oss-inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.oss-inner h2 {
  font-size: 1.7rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.oss-inner p {
  color: var(--muted);
  font-size: 0.97rem;
  margin-bottom: 0.75rem;
}

.oss-inner a {
  color: var(--accent-h);
}

/* ── Footer ──────────────────────────────────── */
footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 0.5rem;
}

footer a {
  color: var(--muted);
}
footer a:hover {
  color: var(--text);
}

@media (max-width: 480px) {
  nav { padding: 1rem 1.25rem; }
  .hero { padding: 4rem 1.25rem 3rem; }
  .features { padding: 2rem 1.25rem 3rem; }
  footer { justify-content: center; text-align: center; }
}

/* ── Locked / unlocked CTA ───────────────────── */
.btn-locked {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.6rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.04);
  color: var(--muted);
  border: 1px solid var(--border);
  cursor: not-allowed;
  user-select: none;
}

.cta-unlocked { display: none; }

@keyframes cta-pop {
  0%   { opacity: 0; transform: scale(0.85) translateY(8px); }
  70%  { transform: scale(1.04) translateY(-2px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

.cta-pop > * {
  animation: cta-pop 0.45s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.cta-pop > *:nth-child(2) { animation-delay: 0.08s; }

/* ── Invite code ─────────────────────────────── */
.invite-inner {
  margin-top: 2.5rem;
  text-align: center;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.invite-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  filter: drop-shadow(0 0 12px rgba(26, 110, 204, 0.5));
}

.invite-heading {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.invite-sub {
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: 1.75rem;
}

.invite-row {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
}

.invite-input {
  background: var(--bg-card);
  border: 1px solid rgba(26, 110, 204, 0.4);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 1rem;
  padding: 0.7rem 1.2rem;
  width: 260px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.invite-input::placeholder { color: var(--muted); }

.invite-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(26, 110, 204, 0.2);
}

.invite-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.7rem 1.4rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
  box-shadow: 0 0 16px rgba(26, 110, 204, 0.35);
}

.invite-btn:hover {
  background: var(--accent-h);
  box-shadow: 0 0 24px rgba(26, 110, 204, 0.5);
}

@keyframes invite-shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-7px); }
  40%       { transform: translateX(7px); }
  60%       { transform: translateX(-4px); }
  80%       { transform: translateX(4px); }
}

.invite-shake {
  animation: invite-shake 0.4s ease;
  border-color: #c0392b !important;
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.2) !important;
}

.invite-success {
  display: none;
  font-size: 1.1rem;
  font-weight: 700;
  color: #4ade80;
  letter-spacing: 0.02em;
}

@keyframes invite-collapse {
  0%   { max-height: 400px; opacity: 1; margin-top: 2.5rem; }
  100% { max-height: 0;     opacity: 0; margin-top: 0; }
}

.invite-done {
  animation: invite-collapse 0.5s ease 0.8s forwards;
  overflow: hidden;
}

/* ── Easter egg ──────────────────────────────── */
.egg-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.egg-overlay.egg-visible {
  opacity: 1;
  pointer-events: all;
}

.egg-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  text-align: center;
  max-width: 340px;
  width: 90%;
  transform: scale(0.88);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.egg-overlay.egg-visible .egg-card {
  transform: scale(1);
}

.egg-grenade {
  font-size: 3rem;
  margin-bottom: 1rem;
  animation: egg-bounce 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) 0.1s both;
}

@keyframes egg-bounce {
  from { transform: scale(0) rotate(-30deg); opacity: 0; }
  to   { transform: scale(1) rotate(0deg);   opacity: 1; }
}

.egg-label {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-h);
  margin-bottom: 0.35rem;
}

.egg-sub {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

.egg-code-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.egg-code {
  font-family: monospace;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  background: rgba(26, 110, 204, 0.12);
  border: 1px solid rgba(26, 110, 204, 0.35);
  border-radius: 8px;
  padding: 0.4rem 0.9rem;
  letter-spacing: 0.05em;
}

.egg-copy {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.4rem 0.85rem;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.egg-copy:hover { background: var(--accent-h); }

.egg-dismiss {
  font-size: 0.78rem;
  color: var(--muted);
}

.egg-dismiss kbd {
  background: var(--bg-oss);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  font-size: 0.78rem;
}