/* ============================================================
   DevArts Mail — design tokens
   ============================================================ */
:root {
  --bg: #0b0c10;
  --panel: #131419;
  --panel-2: #1a1c23;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #eceef4;
  --muted: #8b91a3;
  --accent: #f6821f;
  --accent-soft: rgba(246, 130, 31, 0.14);
  --ok: #3fb950;
  --warn: #d29922;
  --danger: #f85149;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  --font: "Inter", -apple-system, "SF Pro", "Segoe UI", Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
}
.hidden {
  display: none !important;
}
.sub {
  color: var(--muted);
  font-size: 13px;
}
.error {
  color: var(--danger);
  font-size: 13px;
}
.spacer {
  flex: 1;
}

/* ---------- buttons / inputs ---------- */
input,
textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 13px;
  width: 100%;
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
}
input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.btn {
  font: inherit;
  font-weight: 600;
  font-size: 13px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  padding: 8px 14px;
  cursor: pointer;
  color: var(--text);
  background: var(--panel-2);
  border-color: var(--border);
  transition:
    background 0.15s,
    transform 0.05s,
    border-color 0.15s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn:hover {
  border-color: var(--border-strong);
}
.btn:active {
  transform: translateY(1px);
}
.btn.primary {
  background: var(--accent);
  color: #1a1005;
  border: none;
}
.btn.primary:hover {
  filter: brightness(1.08);
}
.btn.ghost {
  background: transparent;
}
.btn.danger {
  background: transparent;
  border-color: rgba(248, 81, 73, 0.4);
  color: var(--danger);
}
.btn.danger:hover {
  background: rgba(248, 81, 73, 0.12);
}
.btn.small {
  padding: 4px 10px;
  font-size: 12px;
}
.btn.block {
  width: 100%;
  justify-content: center;
}
.btn.icon {
  padding: 8px 10px;
}
.btn:disabled {
  opacity: 0.5;
  cursor: default;
}

/* ---------- login ---------- */
.login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(600px 300px at 20% 0%, rgba(246, 130, 31, 0.08), transparent),
    radial-gradient(600px 300px at 80% 100%, rgba(99, 102, 241, 0.07), transparent),
    var(--bg);
}
.login-card {
  width: 340px;
  padding: 36px 32px;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.login-logo {
  width: 52px;
  height: 52px;
  margin: 0 auto;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #f9a03f);
  color: #fff;
  font-weight: 700;
  font-size: 26px;
  display: grid;
  place-items: center;
}
.login-card h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ---------- shell ---------- */
.app {
  display: grid;
  grid-template-columns: 232px 1fr;
  height: 100vh;
}
.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.brand {
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 0 4px;
}
.brand-dot {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  font-size: 13px;
  background: linear-gradient(135deg, var(--accent), #f9a03f);
  display: grid;
  place-items: center;
  color: #fff;
}
.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition:
    background 0.12s,
    color 0.12s;
}
.nav-item:hover {
  background: var(--panel-2);
  color: var(--text);
}
.nav-item.active {
  background: var(--accent-soft);
  color: var(--accent);
}
.nav-item .ico {
  width: 16px;
  text-align: center;
}
.nav-item .count {
  margin-left: auto;
  font-size: 11px;
  background: var(--panel-2);
  border-radius: 10px;
  padding: 1px 7px;
  color: var(--muted);
}
.nav-item.active .count {
  color: var(--accent);
  background: rgba(246, 130, 31, 0.2);
}
.sidebar-foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.me {
  font-size: 12px;
  color: var(--muted);
  padding: 0 4px;
  word-break: break-all;
}

main {
  padding: 18px 20px;
  overflow: hidden;
}
.panel {
  height: calc(100vh - 36px);
}

/* ---------- mail list ---------- */
.split {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 14px;
  height: 100%;
}
.list {
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--panel);
}
.list .item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s;
}
.list .item:last-child {
  border-bottom: none;
}
.list .item:hover {
  background: var(--panel-2);
}
.list .item.selected {
  background: var(--panel-2);
  box-shadow: inset 3px 0 0 var(--accent);
}
.list .item.unread .subj,
.list .item.unread .from {
  font-weight: 700;
}
.list .from {
  font-size: 13px;
  font-weight: 500;
  display: flex;
  gap: 8px;
  align-items: center;
}
.list .subj {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
}
.list .meta {
  font-size: 11px;
  color: var(--muted);
  display: flex;
  gap: 8px;
  margin-top: 3px;
  align-items: center;
}
.badge {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 2px 7px;
  border-radius: 20px;
  text-transform: uppercase;
  background: var(--accent-soft);
  color: var(--accent);
}
.badge.cancel {
  background: rgba(248, 81, 73, 0.14);
  color: var(--danger);
}
.badge.reply {
  background: rgba(63, 185, 80, 0.14);
  color: var(--ok);
}

/* ---------- detail ---------- */
.detail {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--panel);
  padding: 22px 26px;
  overflow-y: auto;
}
.detail.empty {
  display: grid;
  place-items: center;
  color: var(--muted);
}
.detail .head {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 14px;
}
.detail .head h2 {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.detail iframe {
  width: 100%;
  border: 0;
  background: #fff;
  border-radius: 10px;
  min-height: 340px;
}
.detail pre {
  white-space: pre-wrap;
  font-family: var(--font);
  font-size: 14px;
}
.detail .actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.rsvp-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
}
.rsvp-bar .state {
  font-size: 12px;
  color: var(--muted);
  margin-left: 6px;
}
.btn.accept {
  background: var(--ok);
  color: #06170b;
  border: none;
}
.btn.maybe {
  background: var(--warn);
  color: #1a1400;
  border: none;
}

/* ---------- calendar ---------- */
.cal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.cal-header h2 {
  margin: 0 8px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  min-width: 190px;
}
.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  height: calc(100% - 56px);
  grid-auto-rows: 1fr;
}
.cal-grid .dow {
  text-align: center;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px;
  height: auto;
}
.cal-grid .day {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px;
  font-size: 12px;
  cursor: pointer;
  background: var(--panel);
  transition:
    border-color 0.12s,
    background 0.12s;
  min-height: 0;
  overflow: hidden;
}
.cal-grid .day:hover {
  border-color: var(--border-strong);
  background: var(--panel-2);
}
.cal-grid .day.other {
  opacity: 0.32;
}
.cal-grid .day.today {
  border-color: var(--accent);
}
.cal-grid .day.today .num {
  color: var(--accent);
}
.cal-grid .day .num {
  font-weight: 600;
  margin-bottom: 4px;
  font-size: 12px;
}
.cal-grid .evt {
  border-radius: 6px;
  padding: 2px 7px;
  margin-top: 3px;
  font-size: 11px;
  background: var(--panel-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border-left: 3px solid var(--muted);
  transition: background 0.1s;
}
.cal-grid .evt:hover {
  background: #23252e;
}
.cal-grid .evt.invite {
  border-left-color: var(--accent);
}
.cal-grid .evt.own {
  border-left-color: var(--ok);
}
.cal-grid .evt.accepted {
  border-left-color: var(--ok);
}
.cal-grid .evt.declined {
  border-left-color: var(--danger);
  opacity: 0.55;
}
.cal-grid .evt.tentative {
  border-left-color: var(--warn);
}
.cal-grid .evt.cancelled {
  text-decoration: line-through;
  opacity: 0.45;
}

/* ---------- modals ---------- */
dialog {
  background: transparent;
  border: none;
  padding: 0;
  max-width: 92vw;
}
dialog::backdrop {
  background: rgba(4, 5, 8, 0.65);
  backdrop-filter: blur(3px);
}
.modal-card {
  width: 460px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  animation: pop 0.16s ease;
}
@keyframes pop {
  from {
    transform: scale(0.97);
    opacity: 0;
  }
  to {
    transform: none;
    opacity: 1;
  }
}
.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-head h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
}
.modal-head .x {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
  padding: 0 4px;
}
.modal-foot {
  display: flex;
  gap: 8px;
  align-items: center;
}
.modal-card .row {
  display: flex;
  gap: 10px;
}
.modal-card label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12px;
  color: var(--muted);
  flex: 1;
}
.modal-card label.check {
  flex-direction: row;
  align-items: center;
  color: var(--text);
  font-size: 13px;
}
.modal-card label.check input {
  width: auto;
}

/* ---------- toasts ---------- */
#toasts {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 100;
}
.toast {
  background: var(--panel-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 11px 16px;
  font-size: 13px;
  box-shadow: var(--shadow);
  animation: slide-in 0.2s ease;
  max-width: 360px;
}
.toast.ok {
  border-left: 3px solid var(--ok);
}
.toast.err {
  border-left: 3px solid var(--danger);
}
@keyframes slide-in {
  from {
    transform: translateX(20px);
    opacity: 0;
  }
}

/* ---------- scrollbars ---------- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 4px;
}

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .app {
    grid-template-columns: 64px 1fr;
  }
  .sidebar .brand,
  .sidebar .me,
  .nav-item .count {
    display: none;
  }
  .nav-item {
    justify-content: center;
  }
  .split {
    grid-template-columns: 1fr;
  }
  .detail {
    display: none;
  }
}