:root {
  --blue: #315efb;
  --ink: #17202a;
  --muted: #718096;
  --bg: #f4f6fa;
  --card: #fff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.topbar {
  height: 72px;
  background: #fff;
  display: flex;
  align-items: center;
  padding: 0 max(18px, calc((100% - 1100px) / 2));
  border-bottom: 1px solid #e9edf3;
}

.brand {
  font-size: 21px;
  font-weight: 800;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  margin-right: 12px;
  font-size: 14px;
  color: var(--muted);
}

.mode-switch {
  display: flex;
  gap: 4px;
  background: #eef1f5;
  border-radius: 13px;
  padding: 4px;
}

.mode-switch button {
  border: 0;
  background: transparent;
  border-radius: 10px;
  padding: 9px 13px;
  font-weight: 700;
  color: var(--muted);
  cursor: pointer;
}

.mode-switch button.active {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 2px 8px #0001;
}

.view {
  max-width: 1100px;
  margin: 28px auto;
  padding: 0 18px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 20px;
}

.card {
  background: var(--card);
  border-radius: 22px;
  padding: 24px;
  box-shadow: 0 10px 30px #26354a0d;
}

.eyebrow {
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.muted {
  color: var(--muted);
  line-height: 1.5;
}

h1 {
  font-size: 32px;
  margin: 8px 0;
}

h2 {
  margin: 8px 0 10px;
}

.composer {
  border: 1px solid #e4e8ee;
  border-radius: 16px;
  padding: 14px;
  margin-top: 24px;
}

.composer textarea {
  width: 100%;
  min-height: 100px;
  border: 0;
  resize: vertical;
  outline: 0;
  font: inherit;
}

.primary,
.secondary,
.call {
  border: 0;
  border-radius: 13px;
  padding: 12px 15px;
  font-weight: 750;
  cursor: pointer;
}

.primary {
  background: var(--blue);
  color: #fff;
}

.secondary {
  background: #edf0f5;
}

.call {
  width: 100%;
  background: #dff6e9;
  color: #14733d;
  margin-top: 18px;
}

.feed {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.message {
  border: 1px solid #e4e8ee;
  border-radius: 16px;
  padding: 14px;
}

.message small {
  color: var(--muted);
}

.message p {
  margin: 8px 0 0;
}

.hidden {
  display: none !important;
}

.tablet-view {
  display: block;
  max-width: 680px;
}

.tablet-shell {
  background: #15181d;
  border-radius: 28px;
  min-height: 560px;
  color: #fff;
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.tablet-header {
  display: flex;
  justify-content: space-between;
  color: #aab3bf;
  font-size: 13px;
}

.tablet-screen {
  flex: 1;
  display: grid;
  place-items: center;
  text-align: center;
}

.standby {
  color: #9aa3ae;
}

.standby .big-icon {
  font-size: 12px;
  color: #2a2d32;
}

.tablet-screen.notice {
  background: #fff;
  color: var(--ink);
  border-radius: 20px;
  margin: 30px 0;
  padding: 28px;
}

.notice button {
  margin-top: 18px;
}

.tablet-footer {
  text-align: center;
  color: #d6a94d;
  font-size: 13px;
}

.dialog-backdrop {
  position: fixed;
  inset: 0;
  background: #0008;
  display: grid;
  place-items: center;
  padding: 18px;
}

.dialog {
  max-width: 420px;
  width: 100%;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

.login-view {
  min-height: calc(100vh - 72px);
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(420px, 100%);
}

.login-form {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.login-form label {
  display: grid;
  gap: 6px;
  font-weight: 650;
}

.login-form input {
  border: 1px solid #d9dfe8;
  border-radius: 10px;
  padding: 12px;
  font: inherit;
}

.error {
  color: #b42318;
  min-height: 20px;
  margin: 0;
}

@media (max-width: 720px) {
  .view {
    grid-template-columns: 1fr;
  }

  .side-card {
    order: -1;
  }

  .topbar {
    padding: 0 12px;
  }

  .mode-switch button {
    padding: 8px 9px;
  }
}