:root {
  --teal-950: #052e2b;
  --teal-900: #0b3d39;
  --teal-800: #115e59;
  --teal-700: #0f766e;
  --teal-600: #0d9488;
  --teal-100: #ccfbf1;
  --teal-50: #f0fdfa;
  --amber-500: #f59e0b;
  --amber-50: #fffbeb;
  --ink: #13201f;
  --ink-soft: #52605e;
  --paper: #f4f3ee;
  --card: #ffffff;
  --line: #e7e5dd;
  --red: #dc2626;
  --red-50: #fef2f2;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(5, 46, 43, 0.07);
  --shadow-md: 0 10px 30px rgba(5, 46, 43, 0.10);
  --shadow-lg: 0 24px 60px rgba(5, 46, 43, 0.16);
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;
  --font-display: "Fraunces", Georgia, serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
}

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

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

::selection { background: var(--teal-600); color: #fff; }

/* ---------- Top bar ---------- */
.admin-top {
  background:
    radial-gradient(600px 200px at 90% 0%, rgba(13, 148, 136, 0.25), transparent 60%),
    var(--teal-950);
  color: var(--teal-100);
  padding: 0.85rem 0;
  border-bottom: 3px solid var(--amber-500);
}
.admin-top .wrap {
  width: min(1180px, 94%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.admin-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  font-size: 0.95rem;
  color: #fff;
  text-decoration: none;
}
.admin-brand .mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--teal-600), var(--teal-800));
  font-family: var(--font-display);
  font-size: 1.15rem;
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.4);
}
.admin-user {
  display: flex;
  align-items: center;
  gap: 1.1rem;
  font-size: 0.85rem;
}
.admin-user > span { color: rgba(204, 251, 241, 0.75); }
.admin-user em { font-style: normal; color: var(--amber-500); font-weight: 700; }
.admin-user a {
  color: var(--teal-100);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.15s ease;
}
.admin-user a:hover { color: #fff; }

/* ---------- Shell + sidebar ---------- */
.admin-shell {
  width: min(1180px, 94%);
  margin: 0 auto;
  flex: 1;
  display: flex;
  gap: 2rem;
  padding: 2rem 0;
}

.admin-nav {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 175px;
  position: sticky;
  top: 90px;
  align-self: flex-start;
}
.admin-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.92rem;
  border-left: 3px solid transparent;
  transition: all 0.15s ease;
}
.admin-nav a:hover {
  background: var(--card);
  color: var(--teal-700);
  box-shadow: var(--shadow-sm);
}
.admin-nav a.active {
  background: var(--card);
  color: var(--teal-700);
  border-left-color: var(--amber-500);
  box-shadow: var(--shadow-sm);
}
.nav-badge {
  background: var(--amber-500);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 800;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
}

.admin-main { flex: 1; min-width: 0; }

h1.page-title {
  font-family: var(--font-display);
  font-weight: 560;
  font-size: 1.9rem;
  color: var(--teal-950);
  margin-bottom: 1.5rem;
}
h2.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--teal-950);
  margin-bottom: 1rem;
}

/* ---------- Stat cards ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.stat {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem 1.45rem;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.stat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background: var(--teal-600);
}
.stat:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat.accent::before { background: var(--amber-500); }
.stat .num {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--teal-900);
  line-height: 1.1;
}
.stat.accent .num { color: var(--amber-500); }
.stat .label {
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-top: 0.3rem;
}

/* ---------- Panels ---------- */
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.75rem;
  overflow: hidden;
}
.panel-head {
  padding: 1.05rem 1.4rem;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: linear-gradient(180deg, var(--card), rgba(246, 245, 240, 0.5));
}
.panel-body { padding: 1.4rem; }

/* ---------- Tables ---------- */
.msg-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.msg-table th {
  text-align: left;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 0.65rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.msg-table td { padding: 0.75rem 1.1rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.msg-table tbody tr { transition: background 0.12s ease; }
.msg-table tbody tr:hover { background: rgba(240, 253, 250, 0.5); }
.msg-table tr:last-child td { border-bottom: 0; }
.msg-table tr.unread td { background: var(--teal-50); font-weight: 600; }
.msg-table tr.unread:hover td { background: #e6fcf6; }
.msg-table a { color: var(--teal-700); text-decoration: none; }
.msg-table a:hover { text-decoration: underline; }
.msg-table details { font-weight: 400; color: var(--ink-soft); margin-top: 0.35rem; }
.msg-table summary { cursor: pointer; color: var(--teal-700); font-size: 0.85rem; font-weight: 600; }
.msg-table summary:hover { color: var(--teal-600); }
.msg-table details p {
  margin-top: 0.5rem;
  white-space: pre-wrap;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.9rem;
}
.empty { padding: 2.5rem 1.5rem; text-align: center; color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- Badges & pills ---------- */
.badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
}
.badge-new { background: var(--amber-500); color: #fff; box-shadow: 0 2px 8px rgba(245, 158, 11, 0.35); }
.badge-read { background: var(--paper); color: var(--ink-soft); border: 1px solid var(--line); }
.pill {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.28rem 0.75rem;
  border-radius: 999px;
  background: var(--teal-50);
  color: var(--teal-700);
  border: 1px solid var(--teal-100);
}
.pill.off { background: var(--paper); color: var(--ink-soft); border-color: var(--line); }
.chip-ok { color: var(--teal-700); font-weight: 700; }
.chip-off { color: var(--ink-soft); }

/* ---------- Buttons & forms ---------- */
.btn-mini {
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1.5px solid var(--line);
  background: var(--card);
  color: var(--ink-soft);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: all 0.15s ease;
}
.btn-mini:hover { border-color: var(--teal-600); color: var(--teal-700); transform: translateY(-1px); }
.btn-mini.danger:hover { border-color: var(--red); color: var(--red); }
.btn-mini.solid {
  background: var(--teal-700);
  border-color: var(--teal-700);
  color: #fff;
}
.btn-mini.solid:hover { background: var(--teal-600); border-color: var(--teal-600); color: #fff; }
.row-actions { display: flex; gap: 0.4rem; flex-wrap: wrap; }

.form { display: grid; gap: 1.1rem; max-width: 620px; }
.field label {
  display: block;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
  color: var(--teal-950);
}
.field input, .field textarea, .field select {
  width: 100%;
  padding: 0.7rem 0.95rem;
  border: 1.5px solid #b8b5a6;
  border-radius: var(--radius-sm);
  font: inherit;
  background: #fff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--teal-600);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}
select {
  padding: 0.35rem 0.6rem;
  border: 1.5px solid #b8b5a6;
  border-radius: 8px;
  font: inherit;
  font-size: 0.85rem;
  background: #fff;
}
input[type="password"], input[type="email"], input[type="text"] {
  font: inherit;
  border: 1.5px solid #b8b5a6;
  border-radius: 8px;
  padding: 0.45rem 0.7rem;
  background: #fff;
}
input[type="password"]:focus, input[type="email"]:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--teal-600);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}
.sig-box {
  width: 100%;
  padding: 0.7rem 0.95rem;
  border: 1.5px solid #b8b5a6;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 0.85rem;
  background: #fff;
  resize: vertical;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.sig-box:focus {
  outline: none;
  border-color: var(--teal-600);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}
.sig-preview {
  margin-top: 0.5rem;
  border: 1px dashed var(--line);
  border-left: 3px solid var(--teal-600);
  border-radius: var(--radius-sm);
  background: var(--paper);
  padding: 0.6rem 0.9rem;
}
.sig-preview-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.3rem;
}
.sig-preview-label a { color: var(--teal-700); }
.sig-preview-body {
  font-size: 0.88rem;
  color: var(--ink);
  line-height: 1.5;
}
.sig-preview-body p { margin: 0 0 0.35rem; }
.sig-preview-body p:last-child { margin-bottom: 0; }

/* ---------- Mailbox tabs ---------- */
.box-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}
.box-tabs a {
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  border: 1.5px solid var(--line);
  background: var(--card);
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.15s ease;
}
.box-tabs a:hover { border-color: var(--teal-600); color: var(--teal-700); }
.box-tabs a.active {
  background: var(--teal-950);
  border-color: var(--teal-950);
  color: #fff;
}

.mail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.view-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--line);
}
.view-tabs a {
  padding: 0.55rem 1.1rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.view-tabs a:hover { color: var(--teal-700); }
.view-tabs a.active {
  color: var(--teal-700);
  border-bottom-color: var(--amber-500);
}

.form-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
@media (max-width: 640px) {
  .form-2col { grid-template-columns: 1fr; }
  .mail-head { flex-direction: column; align-items: flex-start; }
}

/* ---------- Alerts ---------- */
.alert {
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.05rem;
  margin-bottom: 1rem;
  font-size: 0.92rem;
  font-weight: 500;
  border: 1px solid transparent;
}
.alert-ok { background: var(--teal-50); border-color: #99f6e4; color: var(--teal-900); }
.alert-error { background: var(--red-50); border-color: #fecaca; color: #991b1b; }

/* ---------- Info grid ---------- */
.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 0.5rem 2rem; font-size: 0.9rem; }
.info-grid .k { color: var(--ink-soft); font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
.info-grid .v { font-weight: 600; font-family: var(--mono); font-size: 0.84rem; word-break: break-all; color: var(--teal-950); }
.info-grid .v a { font-family: var(--font-body); }
.info-grid .row { display: flex; flex-direction: column; gap: 0.15rem; padding: 0.6rem 0; border-bottom: 1px dashed var(--line); }
.info-grid .row:last-child { border-bottom: 0; }

/* ---------- Back links ---------- */
.back-link {
  display: inline-block;
  margin-bottom: 1.25rem;
  color: var(--teal-700);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
}
.back-link:hover { color: var(--teal-600); }

/* ---------- Login ---------- */
.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(700px 400px at 80% -10%, rgba(13, 148, 136, 0.3), transparent 60%),
    radial-gradient(500px 300px at 0% 110%, rgba(245, 158, 11, 0.12), transparent 55%),
    linear-gradient(160deg, var(--teal-950), var(--teal-900));
  padding: 1rem;
}
.login-card {
  width: min(410px, 100%);
  background: var(--card);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  padding: 2.6rem 2.3rem;
  text-align: center;
}
.login-card .mark {
  display: inline-grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 15px;
  background: linear-gradient(135deg, var(--teal-600), var(--teal-950));
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin-bottom: 1rem;
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.35);
}
.login-card h1 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--teal-950);
  font-size: 1.45rem;
  margin-bottom: 0.3rem;
}
.login-card p.sub { color: var(--ink-soft); font-size: 0.9rem; margin-bottom: 1.6rem; }
.login-card form { display: grid; gap: 0.9rem; text-align: left; }
.login-card label { font-size: 0.82rem; font-weight: 700; color: var(--teal-950); }
.login-card input {
  width: 100%;
  padding: 0.72rem 0.95rem;
  border: 1.5px solid #b8b5a6;
  border-radius: var(--radius-sm);
  font: inherit;
  margin-top: 0.3rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.login-card input:focus { outline: none; border-color: var(--teal-600); box-shadow: 0 0 0 3px rgba(13,148,136,0.15); }
.btn-login {
  margin-top: 0.5rem;
  padding: 0.85rem;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--teal-700), var(--teal-900));
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.3);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn-login:hover { transform: translateY(-1px); box-shadow: 0 12px 26px rgba(15, 118, 110, 0.4); }
.login-error {
  background: var(--red-50);
  border: 1px solid #fecaca;
  color: #991b1b;
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.95rem;
  font-size: 0.88rem;
  margin-bottom: 0.9rem;
  text-align: left;
}

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .admin-shell { flex-direction: column; gap: 1rem; padding: 1.25rem 0; }
  .admin-nav {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    min-width: 0;
    gap: 0.4rem;
  }
  .admin-nav a { border-left: 0; border-bottom: 3px solid transparent; border-radius: 999px; padding: 0.5rem 0.9rem; }
  .admin-nav a.active { border-bottom-color: var(--amber-500); }
  h1.page-title { font-size: 1.55rem; }
}

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