/* ==========================================================================
   Layout — app shell, header, screens, game
   ========================================================================== */

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ----- Header ----- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-6);
  background: rgba(5,7,13,0.65);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--color-border);
}

.app-header__brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  letter-spacing: 0.01em;
}

.app-header__brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--brand-red) 0%, var(--brand-gold) 100%);
  display: grid;
  place-items: center;
  color: var(--navy-950);
  font-family: var(--font-display);
  font-weight: 600;
  box-shadow: var(--shadow-glow-red);
}

.app-header__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

/* ----- Screen container ----- */
.screen {
  flex: 1;
  padding: var(--sp-8) var(--sp-6);
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
}

.screen--narrow { max-width: 720px; }
.screen--wide { max-width: 1400px; }

.screen__header {
  margin-bottom: var(--sp-8);
}
.screen__header h1 {
  margin-bottom: var(--sp-2);
  background: linear-gradient(135deg, var(--navy-050) 0%, var(--brand-teal-hi) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.screen__header .subtitle {
  color: var(--color-text-mute);
  font-size: var(--fs-md);
}

/* ----- Lobby layout ----- */
.lobby-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: var(--sp-6);
}
@media (max-width: 1020px) {
  .lobby-grid { grid-template-columns: 1fr; }
}

.lobby-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--sp-4);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--color-border);
}
.lobby-section-head h3 {
  font-size: var(--fs-lg);
  font-weight: 500;
}
.lobby-section-head .count {
  color: var(--color-text-mute);
  font-size: var(--fs-sm);
  font-family: var(--font-mono);
}

.games-list { display: flex; flex-direction: column; gap: var(--sp-3); }

.empty-state {
  padding: var(--sp-10) var(--sp-6);
  text-align: center;
  color: var(--color-text-mute);
  border: 1px dashed var(--color-border);
  border-radius: var(--r-lg);
}
.empty-state__icon {
  font-size: var(--fs-2xl);
  margin-bottom: var(--sp-3);
  opacity: 0.5;
}

/* ----- Game screen layout ----- */
.game-screen {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--sidebar-w);
  gap: var(--sp-6);
}
@media (max-width: 1100px) {
  .game-screen { grid-template-columns: 1fr; }
}

.boards-region {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-6);
}
@media (max-width: 760px) {
  .boards-region { grid-template-columns: 1fr; }
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

/* ----- Connect screen ----- */
.connect-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--sp-12) var(--sp-4) var(--sp-8);
}
.connect-hero h1 {
  font-size: clamp(var(--fs-2xl), 5vw, var(--fs-3xl));
  margin-bottom: var(--sp-3);
  background: linear-gradient(135deg, var(--navy-050) 0%, var(--brand-gold-hi) 50%, var(--brand-red-hi) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.connect-hero p {
  max-width: 540px;
  color: var(--color-text-dim);
  font-size: var(--fs-md);
}

.connect-form {
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
}

.recent-servers {
  margin-top: var(--sp-6);
}
.recent-servers h4 {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-text-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--sp-3);
}
.recent-servers__list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.recent-server {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  transition: all var(--dur-base) var(--ease-out);
  cursor: pointer;
}
.recent-server:hover {
  border-color: var(--color-border-hi);
  background: var(--color-surface-2);
  transform: translateY(-1px);
}

/* ----- Placement layout ----- */
.placement-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: var(--sp-6);
  align-items: start;
}
@media (max-width: 900px) {
  .placement-layout { grid-template-columns: 1fr; }
}