:root {
  --bg: #050505;
  --bg-2: #0c0c0c;
  --yellow: #ffe600;
  --yellow-dim: #c9b400;
  --yellow-soft: rgba(255, 230, 0, 0.12);
  --text: #f5f5f5;
  --muted: #9a9a9a;
  --line: rgba(255, 230, 0, 0.2);
  --err: #ff6b6b;
  --ok: #4ade80;
  --font-head: "Orbitron", sans-serif;
  --font-body: "Rajdhani", sans-serif;
  --radius: 16px;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.45;
  font-size: 18px;
}

a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }

.bg-grid {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% -10%, rgba(255, 230, 0, 0.12), transparent 55%),
    linear-gradient(rgba(255, 230, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 230, 0, 0.04) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* ── Login + cube ── */
.login-page { display: grid; place-items: center; padding: 24px; }
.login-wrap {
  position: relative;
  z-index: 1;
  width: min(420px, 100%);
  display: grid;
  gap: 28px;
  justify-items: center;
}

.cube-scene {
  width: 88px;
  height: 88px;
  perspective: 600px;
}

.cube {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  animation: spin-cube 10s linear infinite;
}

.face {
  position: absolute;
  inset: 12px;
  border: 2px solid var(--yellow);
  background: rgba(255, 230, 0, 0.08);
  box-shadow: inset 0 0 18px rgba(255, 230, 0, 0.15);
}
.face.front  { transform: translateZ(32px); }
.face.back   { transform: rotateY(180deg) translateZ(32px); }
.face.right  { transform: rotateY(90deg) translateZ(32px); }
.face.left   { transform: rotateY(-90deg) translateZ(32px); }
.face.top    { transform: rotateX(90deg) translateZ(32px); }
.face.bottom { transform: rotateX(-90deg) translateZ(32px); }

@keyframes spin-cube {
  from { transform: rotateX(-18deg) rotateY(0deg); }
  to   { transform: rotateX(-18deg) rotateY(360deg); }
}

.cube-panel {
  width: 100%;
  padding: 28px 24px;
  background: linear-gradient(160deg, #121212, #0a0a0a);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 230, 0, 0.05);
  display: grid;
  gap: 14px;
}

.eyebrow {
  font-family: var(--font-head);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--yellow);
}

.cube-panel h1 {
  font-family: var(--font-head);
  font-size: 1.45rem;
  letter-spacing: 0.04em;
}

.lead { color: var(--muted); font-size: 0.98rem; }
.lead strong { color: var(--yellow); font-weight: 600; }

label { display: grid; gap: 6px; }
label span {
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

input, textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #080808;
  outline: none;
}
input:focus, textarea:focus {
  border-color: var(--yellow-dim);
  box-shadow: 0 0 0 3px var(--yellow-soft);
}

.btn {
  margin-top: 4px;
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  background: var(--yellow);
  color: #111;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.05); }

.hint { color: var(--muted); font-size: 0.88rem; text-align: center; }
.alert {
  background: rgba(255, 107, 107, 0.12);
  border: 1px solid rgba(255, 107, 107, 0.35);
  color: #ffb4b4;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 0.95rem;
}
.ok {
  background: rgba(74, 222, 128, 0.12);
  border: 1px solid rgba(74, 222, 128, 0.35);
  color: #9af0b8;
  padding: 10px 12px;
  border-radius: 10px;
}

/* ── App shell ── */
.app-page { min-height: 100vh; }
.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 8, 8, 0.92);
  position: sticky;
  top: 0;
  z-index: 5;
}
.brand-block { display: flex; gap: 12px; align-items: center; }
.brand-block strong {
  display: block;
  font-family: var(--font-head);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}
.muted { color: var(--muted); font-size: 0.92rem; }
.cube-mini {
  width: 28px;
  height: 28px;
  border: 2px solid var(--yellow);
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(255, 230, 0, 0.25);
}
.top-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.top-actions a {
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--yellow);
}
.top-actions a.danger { color: #ff8f8f; }

.mail-layout {
  display: grid;
  grid-template-columns: minmax(260px, 360px) 1fr;
  min-height: calc(100vh - 64px);
}
@media (max-width: 860px) {
  .mail-layout { grid-template-columns: 1fr; }
}

.msg-list {
  border-right: 1px solid var(--line);
  padding: 16px;
  background: #080808;
  max-height: calc(100vh - 64px);
  overflow: auto;
}
.msg-list h2 {
  font-family: var(--font-head);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 12px;
}
.msg-list ul { list-style: none; display: grid; gap: 6px; }
.msg-item {
  display: grid;
  gap: 2px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
}
.msg-item:hover, .msg-item.active {
  background: var(--yellow-soft);
  border-color: var(--line);
}
.msg-item .from {
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.msg-item .subject { font-weight: 600; }
.msg-item .date { font-size: 0.8rem; color: var(--muted); }

.msg-pane { padding: 20px; }
.reading h2, .compose h2 {
  font-family: var(--font-head);
  font-size: 1.15rem;
  margin-bottom: 12px;
}
.meta { color: var(--muted); font-size: 0.95rem; margin-bottom: 4px; }
.body {
  margin-top: 18px;
  padding: 16px;
  background: #0a0a0a;
  border: 1px solid var(--line);
  border-radius: 12px;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: var(--font-body);
  font-size: 1rem;
}
.compose form { display: grid; gap: 12px; max-width: 720px; }
.empty { padding: 8px 0; }