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

html,
body {
  height: 100%;
}

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: #c8cdd6;
  background-color: #050608;
  background-image:
    radial-gradient(ellipse 55% 45% at 18% 22%, rgba(0, 90, 95, 0.22), transparent 55%),
    radial-gradient(ellipse 50% 40% at 82% 78%, rgba(35, 55, 85, 0.18), transparent 55%),
    linear-gradient(to right, rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

/* —— header —— */

.site-header {
  padding: 1.25rem 1.5rem;
}

.roadmap-btn {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #9aa3b2;
  background: rgba(10, 14, 22, 0.85);
  border: 1px solid rgba(120, 140, 170, 0.2);
  border-radius: 8px;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.roadmap-btn:hover {
  color: #d8dee8;
  border-color: rgba(100, 180, 200, 0.35);
  background: rgba(14, 20, 32, 0.95);
}

/* —— logo —— */

.hero {
  width: 100%;
  max-width: 720px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.25rem;
}

.logo {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: clamp(2.5rem, 8vw, 3.75rem);
  font-weight: 800;
  letter-spacing: 0.28em;
  text-indent: 0.28em;
  text-transform: uppercase;
  line-height: 1;
  background: linear-gradient(
    180deg,
    #e8eef5 0%,
    #9eb0c4 45%,
    #5a7a94 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 28px rgba(70, 160, 180, 0.35));
  user-select: none;
}

/* —— panels —— */

.main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
}

.panels {
  width: 100%;
  max-width: 720px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.panel {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 56px;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  border: 1px solid rgba(70, 90, 120, 0.25);
  background: linear-gradient(
    180deg,
    rgba(18, 28, 42, 0.95) 0%,
    rgba(8, 12, 20, 0.98) 100%
  );
  box-shadow:
    inset 0 1px 0 rgba(90, 160, 190, 0.35),
    0 4px 24px rgba(0, 0, 0, 0.45);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #d4dae3;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, filter 0.2s, background 0.2s;
  overflow: hidden;
}

.panel--active:hover {
  transform: translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(110, 190, 220, 0.45),
    0 6px 28px rgba(0, 0, 0, 0.55);
  color: #eef2f7;
}

.panel--inactive {
  filter: grayscale(0.85) brightness(0.55);
  cursor: not-allowed;
  border-color: rgba(60, 60, 70, 0.2);
  box-shadow: inset 0 1px 0 rgba(80, 80, 90, 0.15);
}

.panel--inactive:hover {
  filter: grayscale(0.7) brightness(0.42);
}

.panel__label {
  position: relative;
  z-index: 1;
  transition: opacity 0.2s;
}

.panel--inactive:hover .panel__label {
  opacity: 0;
}

.panel__lock {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
  color: #8a919c;
}

.panel--inactive:hover .panel__lock {
  opacity: 1;
}

.panel__lock svg {
  width: 22px;
  height: 22px;
}

/* —— footer —— */

.site-footer {
  padding: 1.5rem;
  text-align: center;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: #3d4450;
  line-height: 1.6;
}

/* —— toast —— */

.toast {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  max-width: 320px;
  padding: 0.9rem 1.15rem;
  font-size: 0.82rem;
  line-height: 1.45;
  color: #c5ccd8;
  background: rgba(12, 16, 24, 0.96);
  border: 1px solid rgba(90, 120, 150, 0.3);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.55);
  opacity: 0;
  transform: translateX(1rem);
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
  z-index: 100;
}

.toast--visible {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

.toast__title {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #6a8a9a;
  margin-bottom: 0.35rem;
}