/* ============================================================
   Shell do sistema: Boot · Login · Energia (sleep/restart/off)
   ============================================================ */

#os {
  position: fixed; inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t4) var(--ease);
}
#os.is-on { opacity: 1; visibility: visible; }

#brightness {
  position: fixed; inset: 0;
  background: #000;
  opacity: 0;
  pointer-events: none;
  z-index: 9500;
  transition: opacity var(--t3) var(--ease);
}

/* ------------------------------------------------------------
   Telas de sistema (compartilham o mesmo comportamento)
   ------------------------------------------------------------ */
#boot, #login, #power {
  position: fixed; inset: 0;
  z-index: var(--z-shell);
  display: none;
  align-items: center;
  justify-content: center;
  user-select: none;
  -webkit-user-select: none;
}
#boot.show, #login.show, #power.show { display: flex; }

/* ------------------------------ BOOT ------------------------------ */
#boot { background: #000; color: #fff; flex-direction: column; }
#boot.fade-out { animation: fadeOut var(--t4) var(--ease) forwards; }

.boot-stage {
  display: flex; flex-direction: column; align-items: center; gap: 1.15rem;
  transition: transform var(--t5) var(--ease-out), opacity var(--t4) var(--ease);
}
.boot-stage.shrink { transform: scale(0.86); opacity: 0; }

.boot-logo {
  display: flex; flex-direction: column; align-items: center; gap: 0.9rem;
  opacity: 0;
  animation: bootLogoIn 1400ms var(--ease-out) 180ms forwards;
}
@keyframes bootLogoIn {
  from { opacity: 0; transform: scale(0.94); filter: blur(6px); }
  to   { opacity: 1; transform: none; filter: none; }
}

.boot-mark {
  width: 5.5rem; height: 5.5rem;
  filter: drop-shadow(0 0 18px rgba(120, 130, 255, 0.45));
  animation: markGlow 3.2s var(--ease) infinite;
}
@keyframes markGlow {
  0%, 100% { filter: drop-shadow(0 0 14px rgba(120, 130, 255, 0.35)); }
  50%      { filter: drop-shadow(0 0 26px rgba(90, 220, 220, 0.55)); }
}

.boot-name {
  font-size: 2.05rem;
  font-weight: 300;
  letter-spacing: 0.22em;
  padding-left: 0.22em;
  background: linear-gradient(100deg, #fff 20%, #b9c6ff 45%, #7ff0e6 60%, #fff 85%);
  background-size: 220% 100%;
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  animation: sheen 4.5s var(--ease) infinite;
}
@keyframes sheen {
  0%   { background-position: 120% 0; }
  55%  { background-position: -60% 0; }
  100% { background-position: -60% 0; }
}

.boot-version {
  font-size: 0.72rem; letter-spacing: 0.42em; padding-left: 0.42em;
  color: rgba(255, 255, 255, 0.42); font-weight: 400;
}

/* carregamento discreto */
.boot-dots { display: flex; gap: 0.45rem; opacity: 0; animation: fadeIn 600ms var(--ease) 900ms forwards; }
.boot-dots i {
  width: 0.32rem; height: 0.32rem; border-radius: 50%;
  background: rgba(255, 255, 255, 0.75);
  animation: dotPulse 1.25s var(--ease) infinite;
}
.boot-dots i:nth-child(2) { animation-delay: 0.15s; }
.boot-dots i:nth-child(3) { animation-delay: 0.3s; }
.boot-dots i:nth-child(4) { animation-delay: 0.45s; }
@keyframes dotPulse {
  0%, 100% { opacity: 0.2; transform: scale(0.75); }
  40%      { opacity: 1; transform: scale(1); }
}

.boot-status {
  position: absolute; bottom: 2.5rem; left: 0; right: 0;
  text-align: center; font-size: 0.72rem; letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.34);
  opacity: 0; animation: fadeIn 500ms var(--ease) 1200ms forwards;
}

/* ------------------------------ LOGIN ------------------------------ */
#login { background: var(--bg); overflow: hidden; }
#login::before {
  content: ""; position: absolute; inset: -6%;
  background-image: var(--wall, none);
  background-size: cover; background-position: center;
  /* escurecido de propósito em qualquer tema: o texto do login é branco */
  filter: blur(26px) saturate(1.05) brightness(0.6);
  transform: scale(1.08);
  animation: loginBg var(--t5) var(--ease-out);
}
@keyframes loginBg { from { transform: scale(1.16); opacity: 0; } to { transform: scale(1.08); opacity: 1; } }

#login::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(80% 70% at 50% 45%, transparent, rgba(0, 0, 0, 0.55));
}

.login-card {
  position: relative; z-index: 2;
  display: flex; flex-direction: column; align-items: center;
  gap: 1.1rem; width: min(21rem, 88vw);
  text-align: center;
  animation: riseIn var(--t4) var(--ease-out) 120ms backwards;
}

.login-avatar {
  width: 6.5rem; height: 6.5rem; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--accent-grad);
  color: #fff;
  box-shadow: 0 12px 40px -8px rgba(0, 0, 0, 0.65), inset 0 0 0 1px rgba(255, 255, 255, 0.2);
  transition: transform var(--t3) var(--spring);
}
.login-avatar svg { width: 3.1rem; height: 3.1rem; }
.login-card:hover .login-avatar { transform: translateY(-2px) scale(1.02); }

.login-name { font-size: 1.4rem; font-weight: 500; letter-spacing: 0.01em; color: #fff; }
[data-theme="light"] .login-name { color: #fff; text-shadow: 0 1px 12px rgba(0, 0, 0, 0.35); }

.login-form { display: flex; flex-direction: column; gap: 0.6rem; width: 100%; }
.login-input-wrap { position: relative; display: flex; align-items: center; }
.login-input {
  width: 100%; height: 2.6rem; padding: 0 2.8rem 0 1rem;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(12px);
  color: #fff;
  text-align: center;
  transition: border-color var(--t2) var(--ease), background var(--t2) var(--ease),
    box-shadow var(--t2) var(--ease);
}
.login-input::placeholder { color: rgba(255, 255, 255, 0.55); }
.login-input:focus {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.08);
}
.login-go {
  position: absolute; right: 0.28rem;
  width: 2.05rem; height: 2.05rem; border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  transition: background var(--t2) var(--ease), transform var(--t2) var(--spring);
}
.login-go:hover { background: var(--accent); transform: scale(1.08); }
.login-go:active { transform: scale(0.94); }
.login-go svg { width: 1rem; height: 1rem; }

.login-hint { font-size: 0.72rem; color: rgba(255, 255, 255, 0.55); }
.login-alt {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.4rem 0.95rem; border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff; font-size: 0.8rem;
  transition: background var(--t2) var(--ease), transform var(--t2) var(--ease);
}
.login-alt:hover { background: rgba(255, 255, 255, 0.16); transform: translateY(-1px); }
.login-alt svg { width: 1rem; height: 1rem; }

.login-shake { animation: shake 420ms var(--ease); }
@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-6px); }
  40%, 60% { transform: translateX(6px); }
}

/* rodapé do login */
.login-foot {
  position: absolute; z-index: 2; bottom: 1.5rem; left: 0; right: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 1.6rem; color: rgba(255, 255, 255, 0.6); font-size: 0.75rem;
}
.login-foot .row { gap: 0.85rem; }
.login-foot svg { width: 1.05rem; height: 1.05rem; }

#login.leaving .login-card { animation: loginOut var(--t4) var(--ease-in) forwards; }
@keyframes loginOut { to { opacity: 0; transform: scale(1.06) translateY(-6px); filter: blur(4px); } }
#login.leaving { animation: fadeOut var(--t4) var(--ease) 120ms forwards; }

/* ------------------------------ ENERGIA ------------------------------ */
#power { background: #000; color: #fff; flex-direction: column; gap: 1.4rem; }
#power .boot-mark { width: 4rem; height: 4rem; }
.power-title {
  font-size: 1.7rem; font-weight: 300; letter-spacing: 0.2em; padding-left: 0.2em;
  color: rgba(255, 255, 255, 0.95);
}
.power-sub { font-size: 0.82rem; color: rgba(255, 255, 255, 0.5); letter-spacing: 0.08em; }
.power-block { display: flex; flex-direction: column; align-items: center; gap: 0.9rem; animation: fadeIn var(--t4) var(--ease); }
.power-block.out { animation: fadeOut var(--t4) var(--ease) forwards; }
.power-ring {
  width: 1.6rem; height: 1.6rem; border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.18);
  border-top-color: rgba(255, 255, 255, 0.85);
  animation: spin 900ms linear infinite;
}
.power-press {
  margin-top: 0.6rem; font-size: 0.75rem; letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.38);
  animation: breathe 2.6s var(--ease) infinite;
}
@keyframes breathe { 0%, 100% { opacity: 0.28; } 50% { opacity: 0.75; } }
#power.clickable { cursor: pointer; }

/* Sleep */
.sleep-clock { font-size: 4rem; font-weight: 200; letter-spacing: 0.02em; color: rgba(255, 255, 255, 0.9); }
.sleep-date { font-size: 0.95rem; color: rgba(255, 255, 255, 0.45); letter-spacing: 0.1em; }

@media (max-width: 600px) {
  .boot-name { font-size: 1.6rem; }
  .boot-mark { width: 4.2rem; height: 4.2rem; }
  .login-avatar { width: 5rem; height: 5rem; }
  .login-avatar svg { width: 2.4rem; height: 2.4rem; }
  .login-foot { padding: 0 1rem; font-size: 0.7rem; }
}