/* Glass theme: frosted panels over a deep-harbour backdrop; mail bodies sit on solid paper for legibility. */
:root {
  --deep: #07182A;
  --tide: #0E5F6B;
  --harbour: #123B5C;
  --lamp: #F2B84B;          /* amber accent: unread + primary actions */
  --lamp-ink: #2A1C04;
  --text: #EAF2F5;
  --muted: #9DB3BF;
  --faint: #6F8896;
  --paper: #FBFCFD;
  --danger: #FF8A80;

  --glass: rgba(255, 255, 255, 0.07);
  --glass-strong: rgba(255, 255, 255, 0.12);
  --glass-hover: rgba(255, 255, 255, 0.10);
  --glass-edge: rgba(255, 255, 255, 0.14);
  --glass-shadow: 0 24px 60px rgba(2, 10, 20, 0.45);
  --blur: blur(26px) saturate(150%);

  --r-panel: 22px;
  --r-control: 12px;
  --gap: 12px;
  --ui: "Hanken Grotesk", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font: 15px/1.45 var(--ui);
  color: var(--text);
  background:
    radial-gradient(900px 600px at 12% 8%, rgba(14, 95, 107, 0.85), transparent 60%),
    radial-gradient(700px 520px at 88% 92%, rgba(242, 184, 75, 0.28), transparent 60%),
    radial-gradient(800px 700px at 70% 20%, rgba(18, 59, 92, 0.9), transparent 65%),
    var(--deep);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
button, input, textarea, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--lamp); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
svg.i { width: 18px; height: 18px; flex: none; stroke: currentColor; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

.glass {
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-radius: var(--r-panel);
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass { background: rgba(16, 38, 58, 0.92); }
}

/* ---------- shell ---------- */
.shell {
  display: grid;
  grid-template-columns: 232px minmax(320px, 400px) 1fr;
  gap: var(--gap);
  height: 100vh;
  padding: var(--gap);
}

/* rail */
.rail { display: flex; flex-direction: column; padding: 20px 12px 14px; min-height: 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: -0.01em; padding: 0 8px 20px; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(145deg, var(--lamp), #E58F2B); color: var(--lamp-ink);
}
.brand-mark svg.i { width: 17px; height: 17px; stroke-width: 2; }
.compose-btn {
  display: flex; align-items: center; gap: 10px;
  background: var(--lamp); color: var(--lamp-ink); border: 0; border-radius: 14px;
  padding: 11px 14px; font-weight: 700; cursor: pointer; margin: 0 2px 18px;
  box-shadow: 0 8px 24px rgba(242, 184, 75, 0.28);
}
.compose-btn:hover { background: #F6C566; }
.folders { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; display: flex; flex-direction: column; gap: 2px; }
.folders button {
  width: 100%; display: flex; align-items: center; gap: 10px; background: none; border: 0;
  padding: 9px 10px; border-radius: var(--r-control); cursor: pointer; text-align: left; color: var(--muted);
}
.folders button:hover { background: var(--glass-hover); color: var(--text); }
.folders button[aria-current="true"] { background: var(--glass-strong); color: var(--text); font-weight: 600; box-shadow: inset 0 0 0 1px var(--glass-edge); }
.folders .label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folders .count {
  background: var(--lamp); color: var(--lamp-ink); font-size: 12px; font-weight: 700;
  border-radius: 999px; padding: 1px 8px; font-variant-numeric: tabular-nums;
}
.account { display: flex; align-items: center; gap: 10px; border-top: 1px solid var(--glass-edge); padding: 14px 6px 0; margin-top: 10px; }
.account .who { flex: 1; min-width: 0; font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account button { background: none; border: 0; color: var(--muted); padding: 6px; border-radius: 8px; cursor: pointer; display: grid; place-items: center; }
.account button:hover { color: var(--text); background: var(--glass-hover); }

/* avatars */
.avatar {
  width: 36px; height: 36px; border-radius: 50%; flex: none; display: grid; place-items: center;
  font-weight: 700; font-size: 14px; color: #fff;
  background: hsl(var(--h, 190) 45% 38%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}
.avatar.lg { width: 44px; height: 44px; font-size: 16px; }

/* ---------- list ---------- */
.list { display: flex; flex-direction: column; min-width: 0; min-height: 0; overflow: hidden; }
.list-head { padding: 16px 16px 8px; display: flex; gap: 8px; align-items: center; }
.search-wrap { flex: 1; position: relative; }
.search-wrap svg.i { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--faint); pointer-events: none; }
.search {
  width: 100%; border: 1px solid var(--glass-edge); border-radius: var(--r-control);
  padding: 9px 12px 9px 38px; background: rgba(0, 0, 0, 0.18); color: var(--text);
}
.search::placeholder { color: var(--faint); }
.search:focus { outline: none; border-color: rgba(242, 184, 75, 0.6); background: rgba(0, 0, 0, 0.25); }
.icon-btn {
  border: 1px solid var(--glass-edge); background: var(--glass); color: var(--muted);
  border-radius: var(--r-control); width: 40px; height: 40px; display: grid; place-items: center; cursor: pointer;
}
.icon-btn:hover { color: var(--text); background: var(--glass-strong); }
.list-title { padding: 8px 20px 8px; font-weight: 700; font-size: 20px; letter-spacing: -0.01em; }
.messages { list-style: none; margin: 0; padding: 0 8px 8px; overflow-y: auto; flex: 1; }
.msg {
  display: flex; gap: 12px; width: 100%; text-align: left; background: none; border: 0;
  padding: 12px; border-radius: 14px; cursor: pointer; position: relative; color: var(--text);
}
.msg:hover { background: var(--glass-hover); }
.msg[aria-current="true"] { background: var(--glass-strong); box-shadow: inset 0 0 0 1px var(--glass-edge); }
.msg-main { flex: 1; min-width: 0; }
.msg-top { display: flex; justify-content: space-between; gap: 10px; align-items: baseline; }
.msg-from, .msg-subj, .msg-snip { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.msg-from { color: var(--muted); }
.msg-subj { color: var(--muted); }
.msg.unread .msg-from, .msg.unread .msg-subj { color: var(--text); font-weight: 700; }
.msg.unread::after {
  content: ""; position: absolute; left: 4px; top: 50%; width: 6px; height: 6px; margin-top: -3px;
  border-radius: 50%; background: var(--lamp); box-shadow: 0 0 10px var(--lamp);
}
.msg-time { color: var(--faint); font-size: 12px; white-space: nowrap; font-variant-numeric: tabular-nums; }
.msg.unread .msg-time { color: var(--lamp); }
.msg-snip { color: var(--faint); font-size: 13px; }
.msg-snip:empty { display: none; }
.more { margin: 10px auto; display: block; }
.empty { padding: 40px 20px; color: var(--muted); text-align: center; }

/* ---------- reader ---------- */
.reader { display: flex; flex-direction: column; min-width: 0; min-height: 0; overflow: hidden; }
.reader-empty { margin: auto; color: var(--muted); text-align: center; padding: 20px; display: grid; justify-items: center; gap: 12px; }
.reader-empty svg.i { width: 44px; height: 44px; stroke-width: 1.2; color: var(--faint); }
.reader-head { padding: 24px 28px 18px; }
.btn.back { display: none; }
.subject { font-size: 26px; font-weight: 700; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 18px; max-width: 60ch; }
.sender { display: flex; gap: 12px; align-items: center; }
.sender-info { flex: 1; min-width: 0; font-size: 13px; color: var(--muted); }
.sender-info b { display: block; color: var(--text); font-size: 15px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sender-info div { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sender-time { font-size: 13px; color: var(--faint); white-space: nowrap; align-self: flex-start; }
.actions { display: flex; gap: 8px; margin-top: 18px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--glass-edge); background: var(--glass); color: var(--text);
  border-radius: var(--r-control); padding: 8px 14px; cursor: pointer;
}
.btn:hover { background: var(--glass-strong); }
.btn.primary { background: var(--lamp); color: var(--lamp-ink); border-color: transparent; font-weight: 700; }
.btn.primary:hover { background: #F6C566; }
.btn:disabled { opacity: 0.6; cursor: default; }
.atts { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 28px 14px; }
.att {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text); text-decoration: none;
  border: 1px solid var(--glass-edge); background: rgba(0, 0, 0, 0.18); border-radius: 999px; padding: 6px 12px;
}
.att:hover { background: var(--glass-strong); }
.att svg.i { width: 15px; height: 15px; color: var(--lamp); }
.body-frame {
  flex: 1; border: 0; background: var(--paper); border-radius: 16px;
  margin: 0 14px 14px; width: calc(100% - 28px); min-height: 200px;
  box-shadow: 0 10px 30px rgba(2, 10, 20, 0.25);
}

/* ---------- compose ---------- */
dialog.compose {
  border: 1px solid var(--glass-edge); border-radius: var(--r-panel); padding: 0; width: min(640px, 94vw);
  color: var(--text); background: rgba(12, 32, 52, 0.9);
  backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
  box-shadow: 0 30px 80px rgba(2, 10, 20, 0.6);
}
dialog.compose[open] { animation: rise 0.22s ease-out; }
.reader > * { animation: fade 0.12s ease-out; }
@keyframes fade { from { opacity: 0; } }
#refreshBtn.spinning svg { animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes rise { from { opacity: 0; transform: translateY(12px) scale(0.98); } }
dialog.compose::backdrop { background: rgba(4, 12, 22, 0.45); backdrop-filter: blur(4px); }
.compose form { display: flex; flex-direction: column; }
.compose header { padding: 16px 20px; font-weight: 700; font-size: 17px; display: flex; justify-content: space-between; align-items: center; }
.compose header button { background: none; border: 0; color: var(--muted); cursor: pointer; border-radius: 8px; padding: 4px; display: grid; place-items: center; }
.compose header button:hover { color: var(--text); background: var(--glass-hover); }
.field { display: flex; align-items: center; border-top: 1px solid var(--glass-edge); padding: 0 20px; }
.field label { width: 64px; color: var(--faint); font-size: 13px; }
.field input { flex: 1; border: 0; padding: 12px 0; background: none; color: var(--text); }
.field input:focus, .compose textarea:focus { outline: none; }
.field:focus-within { background: rgba(255, 255, 255, 0.05); box-shadow: inset 3px 0 0 var(--lamp); }
.compose textarea:focus { background: rgba(0, 0, 0, 0.2); }
.compose textarea {
  border: 0; border-top: 1px solid var(--glass-edge); padding: 16px 20px; min-height: 260px; resize: vertical;
  background: rgba(0, 0, 0, 0.14); color: var(--text); outline-offset: -2px; line-height: 1.55;
}
.compose footer { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 20px; border-top: 1px solid var(--glass-edge); }
.compose .error { color: var(--danger); font-size: 13px; }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translate(-50%, 10px);
  background: rgba(14, 36, 56, 0.85); border: 1px solid var(--glass-edge); color: var(--text);
  backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
  padding: 10px 18px; border-radius: 999px; font-size: 14px; opacity: 0; pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.error { border-color: rgba(255, 138, 128, 0.6); color: var(--danger); }

/* ---------- login ---------- */
.login { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { padding: 36px; width: min(420px, 100%); }
.login-card .brand { padding: 0 0 28px; }
.login-card h1 { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 6px; }
.login-card p { color: var(--muted); margin: 0 0 26px; }
.login-card .error {
  color: var(--danger); background: rgba(255, 138, 128, 0.1); border: 1px solid rgba(255, 138, 128, 0.35);
  border-radius: var(--r-control); padding: 10px 12px; margin-bottom: 18px; font-size: 14px;
}
.login-form { display: flex; flex-direction: column; }
.login-form label { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.login-form input {
  border: 1px solid var(--glass-edge); border-radius: var(--r-control); padding: 11px 14px; margin-bottom: 16px;
  background: rgba(0, 0, 0, 0.2); color: var(--text);
}
.login-form input:focus { outline: none; border-color: rgba(242, 184, 75, 0.7); }
.login-form button { justify-content: center; padding: 12px; margin-top: 6px; font-size: 15px; }

/* ---------- mobile ---------- */
@media (max-width: 900px) {
  .shell { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr); gap: 10px; padding: 10px; }
  .rail, .list, .reader { min-width: 0; }
  .rail { flex-direction: row; flex-wrap: wrap; align-items: center; gap: 8px; padding: 10px; }
  .brand { padding: 0 4px; font-size: 16px; }
  .compose-btn { margin: 0 0 0 auto; padding: 8px 12px; }
  .folders { flex-direction: row; flex: 1 1 100%; overflow-x: auto; gap: 4px; order: 3; }
  .folders button { white-space: nowrap; width: auto; }
  .account { display: none; }
  .reader { display: none; }
  .shell.reading .list { display: none; }
  .shell.reading .reader { display: flex; }
  .btn.back { display: inline-flex; margin-bottom: 14px; }
  .reader-head { padding: 16px; }
  .subject { font-size: 22px; }
  .atts { padding: 0 16px 12px; }
  .body-frame { margin: 0 8px 8px; width: calc(100% - 16px); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ---------- admin link in the mail sidebar ---------- */
.admin-link { display: flex; align-items: center; gap: 10px; margin-top: auto; padding: 9px 12px; border-radius: var(--r-control); color: var(--muted); text-decoration: none; font-size: 14px; }
.admin-link:hover { background: var(--glass-hover); color: var(--text); }
.admin-link + .account { margin-top: 6px; }