* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-stack);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overscroll-behavior-y: contain;
}

main.shell {
  max-width: 520px;
  margin: 0 auto;
  padding: max(env(safe-area-inset-top), 20px) 18px max(env(safe-area-inset-bottom), 28px);
}

.hero { padding: 12px 4px 8px; }
.hero h1 { margin: 0 0 6px; font-size: 26px; letter-spacing: -0.01em; }
.hero p { margin: 0; color: var(--text-2); }

.muted { color: var(--text-2); }
.dim { color: var(--text-3); }
.small { font-size: 13px; }
.mono { font-family: var(--font-mono); word-break: break-all; }

.card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin: 14px 0;
}
.card h2 { margin: 0 0 8px; font-size: 16px; font-weight: 600; }
.card p { margin: 0 0 10px; color: var(--text-2); }

.stack { display: flex; flex-direction: column; gap: 10px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; }

.input {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  font-family: var(--font-mono);
}
.input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  min-height: 44px;
  flex: 1 1 auto;
}
.btn:active { background: var(--accent-hover); transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-secondary { background: var(--bg-3); color: var(--text); border-color: var(--border-strong); }
.btn-ghost { background: transparent; color: var(--text-2); border-color: var(--border); }
.btn-danger { background: transparent; color: var(--danger); border-color: var(--danger); }

.notice {
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 14px;
}
.notice-error {
  background: rgba(244, 33, 46, 0.12);
  border: 1px solid rgba(244, 33, 46, 0.45);
  color: #fecaca;
}
.notice-info {
  background: rgba(29, 161, 242, 0.10);
  border: 1px solid rgba(29, 161, 242, 0.40);
  color: var(--text);
}

.kv {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 6px 14px;
  margin: 8px 0 16px;
  padding: 0;
}
.kv dt { color: var(--text-3); font-size: 13px; align-self: center; }
.kv dd { margin: 0; align-self: center; word-break: break-all; }
.kv dd.ok { color: var(--success); }
.kv dd.fail { color: var(--danger); }

.advanced summary {
  cursor: pointer;
  user-select: none;
  padding: 4px 0;
}
.advanced[open] summary { color: var(--text); }

code { font-family: var(--font-mono); font-size: 0.92em; }

/* ---- Navigation tabs ---- */
.nav-tabs {
  display: flex;
  justify-content: center;
  gap: 4px;
  padding: 8px 16px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 10px 16px;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--text-3);
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  min-height: 38px;
}

.nav-tab.active {
  background: var(--bg-3);
  color: var(--text);
  font-weight: 600;
}

.nav-tab-icon { padding: 10px; }

/* ---- Player global styles ---- */
/*
   When the player view mounts, #view-root loses the .shell class and the
   nav-tabs are hidden. These rules apply only when a full-viewport player
   is active.
*/
#view-root:not(.shell) {
  max-width: none;
  margin: 0;
  padding: 0;
}

/* Ensure the main scroll region adapts when player isn't showing */
main.shell { padding-top: 80px; }

/* Prevent body scroll when player has fixed positioning */
body:has(#view-root[data-player]) {
  overflow: hidden;
  position: fixed;
  inset: 0;
}

/* style select elements to match .input */
select.input {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  appearance: menulist;
}

label.small { display: block; margin-bottom: 4px; }

/* -- Justify-between row helper -- */
.row.justify-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* -- Active toggle button -- */
.btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* -- Ghost/icon button -- */
.btn-ghost {
  background: transparent;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  padding: 4px 8px;
  font: inherit;
  font-size: 13px;
}