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

:root {
  --bg: #0d0d1a;
  --surface: #161628;
  --surface2: #1e1e36;
  --border: #2a2a4a;
  --text: #e0e0f0;
  --text-muted: #7070a0;
  --accent: #7c6af7;
  --accent-text: #fff;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
}

h1 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
}

/* Nav */
nav {
  position: relative;
  width: 100%;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
}

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

nav a.nav-logo {
  display: flex;
  align-items: center;
  align-self: center;
  margin-right: -0.35rem;
}

nav a.nav-logo svg {
  width: 1.1em;
  height: 1.1em;
  display: block;
}
nav .sep {
  color: var(--text-muted);
  transform: translate(2px, -2px);
}
nav .current {
  font-family: 'Russo One', sans-serif;
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  line-height: 1;
}

/* Game page layout */
.game-wrapper {
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  width: 100%;
}

/* Overlay */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}

.overlay.hidden { display: none; }

.overlay-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  max-width: 320px;
  width: calc(100% - 3rem);
  min-height: 320px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 0;
}

.overlay-icon  { font-size: 3rem; }
.overlay-text  { display: flex; flex-direction: column; gap: 0.4rem; }
.overlay-title { font-size: 1.6rem; font-weight: 700; }
.overlay-sub   { color: var(--text-muted); font-size: 0.95rem; }

.overlay-btn {
  width: 100%;
  padding: calc(0.65rem - 2px) 0.9rem calc(0.65rem + 2px);
  border-radius: 10px;
  border: none;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  transition: filter 0.15s;
}

.overlay-btn:hover { filter: brightness(1.15); }

/* Nav icon buttons (hint / settings / fullscreen) */
.hint-btn,
.settings-btn,
.fs-btn {
  width: 2rem;
  height: 2rem;
  padding: 0;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, border-color 0.15s;
  flex-shrink: 0;
}

@media (hover: hover) {
  .hint-btn:hover,
  .settings-btn:hover,
  .fs-btn:hover {
    color: var(--text);
    border-color: var(--text);
  }
}

.hint-btn:active,
.settings-btn:active,
.fs-btn:active {
  color: var(--text);
  border-color: var(--text);
}

.hint-btn svg     { width: 18px; height: 18px; }
.settings-btn svg { width: 16px; height: 16px; }
.fs-btn svg       { width: 14px; height: 14px; }

.hint-btn { margin-left: auto; }

.nav-emoji {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1.3rem;
  line-height: 1;
  pointer-events: none;
}

.fs-btn .fs-icon-exit          { display: none; }
.fs-btn.fs-active .fs-icon-enter { display: none; }
.fs-btn.fs-active .fs-icon-exit  { display: block; }

/* Hint modal */
.hint-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.hint-modal.hidden { display: none; }

.hint-modal-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem 2rem 1.75rem;
  max-width: 320px;
  width: calc(100% - 3rem);
  min-height: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.hint-modal-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  align-self: flex-start;
}

.hint-modal-text {
  align-self: flex-start;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.hint-block {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.hint-block-sep {
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
}

.hint-modal-close {
  width: 100%;
  padding: calc(0.65rem - 2px) 0.9rem calc(0.65rem + 2px);
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: filter 0.15s;
}

.hint-modal-close:hover { filter: brightness(1.12); }

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}