@import url("tokens.css");

* { box-sizing: border-box; }
html, body { overflow-x: clip; height: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-ink);
  font-size: var(--text-base);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-size: 0.93em; }
code { font-family: var(--font-mono); font-size: 0.9em; overflow-wrap: anywhere; white-space: normal; color: var(--color-ink-2); }
.icon { width: 1rem; height: 1rem; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.icon--lg { width: 2rem; height: 2rem; }
.icon--clip { color: var(--color-muted); }
a { color: inherit; }

/* App shell */

.appshell {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */

.sidebar {
  width: var(--sidebar-w);
  flex: none;
  background: var(--color-sidebar);
  border-right: 1px solid var(--color-border);
  padding: var(--space-5) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.sidebar__brand { display: flex; flex-direction: column; gap: var(--space-1); padding: 0 var(--space-2); }
.sidebar__mark { font-family: var(--font-display); font-weight: 600; font-size: var(--text-lg); letter-spacing: -0.01em; color: var(--color-ink); }
.sidebar__env { font-size: var(--text-xs); color: var(--color-muted); }

.sidebar__section { display: flex; flex-direction: column; gap: var(--space-2); }
.sidebar__heading { font-size: var(--text-xs); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-muted); padding: 0 var(--space-2); }

.navlist { display: flex; flex-direction: column; gap: var(--space-1); }

.navitem {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--color-ink-2);
  font-family: var(--font-body);
  font-size: var(--text-md);
  font-weight: 450;
  padding: var(--space-2) var(--space-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out);
}
.navitem .icon { color: var(--color-muted); transition: color var(--dur-short) var(--ease-out); }
.navitem:hover { background: var(--color-hover); }
.navitem:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.navitem.is-active { background: var(--color-selection); color: var(--color-accent); font-weight: 600; }
.navitem.is-active .icon { color: var(--color-accent); }

/* Main column */

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.maintop {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6) var(--space-4);
}

.search {
  flex: 1 1 24rem;
  max-width: 30rem;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-hover);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: var(--space-2) var(--space-4);
  color: var(--color-muted);
}
.search input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-sm);
}
.search input::placeholder { color: var(--color-muted); }
.search:focus-within { border-color: var(--color-accent); background: var(--color-bg); box-shadow: 0 0 0 3px var(--color-selection); }

.maintop__count { font-size: var(--text-xs); color: var(--color-muted); white-space: nowrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out);
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.btn--secondary { background: var(--color-bg); border-color: var(--color-border); color: var(--color-ink); }
.btn--secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* Message list */

.messagelist {
  flex: 1;
  margin: 0 var(--space-6) var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg);
}

.row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: background-color var(--dur-short) var(--ease-out);
}
.row:last-child { border-bottom: 0; }
.row:hover { background: var(--color-hover); }
.row:focus-visible { outline: 2px solid var(--color-accent); outline-offset: -2px; border-radius: var(--radius-sm); }
.row.is-selected { background: var(--color-selection); }

.row__avatar {
  flex: none;
  width: 2.25rem; height: 2.25rem;
  border-radius: var(--radius-pill);
  background: var(--color-selection);
  color: var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: var(--text-xs); font-weight: 700;
  margin-top: 0.1rem;
}

.row__body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 0.3rem; }

.row__line1 { display: flex; align-items: baseline; gap: var(--space-2); min-width: 0; }
.row__sender {
  font-weight: 600; color: var(--color-ink); font-size: var(--text-sm);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  min-width: 3rem; flex: 1 1 auto;
}
.row__arrow { color: var(--color-muted); font-size: var(--text-xs); flex: none; }
.row__to {
  color: var(--color-muted); font-size: var(--text-xs);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  min-width: 2rem; flex: 1 1 auto;
}
.row__time { margin-left: auto; flex: none; color: var(--color-muted); font-size: var(--text-xs); }

.row__line2 { display: flex; align-items: center; gap: var(--space-2); min-width: 0; }
.row__text {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: var(--text-sm);
}
.row__subject { font-weight: 550; color: var(--color-ink); }
.row__preview { color: var(--color-ink-2); }

/* Drawer (reading pane) */

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(var(--drawer-w), 100vw);
  background: var(--color-bg);
  border-left: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  transform: translateX(100%);
  transition: transform var(--dur-med) var(--ease-out);
  overflow-y: auto;
  padding: var(--space-6);
  z-index: 30;
}
.drawer.is-open { transform: translateX(0); }

.drawer__empty { display: none; }

.drawer__content { position: relative; padding-top: var(--space-2); }
.drawer__close {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--color-hover);
  border: 0;
  color: var(--color-ink-2);
  width: 2rem; height: 2rem;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  border-radius: var(--radius-pill);
}
.drawer__close:hover { background: var(--color-selection); color: var(--color-accent); }
.drawer__close:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.drawer__avatar {
  display: flex; align-items: center; justify-content: center;
  width: 3rem; height: 3rem;
  border-radius: var(--radius-pill);
  background: var(--color-selection);
  color: var(--color-accent);
  font-weight: 700;
  font-size: var(--text-md);
  margin-bottom: var(--space-4);
}

.drawer h3 { margin: 0 2.5rem var(--space-4) 0; font-family: var(--font-display); font-weight: 600; font-size: var(--text-2xl); letter-spacing: -0.01em; color: var(--color-ink); }

.drawer__meta { display: grid; gap: var(--space-2); margin: 0 0 var(--space-5); padding-bottom: var(--space-5); border-bottom: 1px solid var(--color-border); }
.drawer__meta div { display: flex; gap: var(--space-3); font-size: var(--text-sm); }
.drawer__meta dt { flex: none; width: 4rem; color: var(--color-muted); }
.drawer__meta dd { margin: 0; color: var(--color-ink); word-break: break-word; }

.drawer__body { color: var(--color-ink-2); margin: 0 0 var(--space-5); font-size: var(--text-md); }

/* Footer */

.disclaimer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-5) var(--space-6);
  text-align: center;
}
.disclaimer p {
  max-width: 42rem;
  margin: 0 auto;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-muted);
}

/* Responsive */

@media (max-width: 900px) {
  .appshell { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; align-items: center; flex-wrap: wrap; border-right: 0; border-bottom: 1px solid var(--color-border); padding: var(--space-3) var(--space-4); gap: var(--space-4); }
  .sidebar__brand { padding: 0; }
  .navlist { flex-direction: row; flex-wrap: wrap; }
  .navitem { width: auto; }
}

@media (max-width: 640px) {
  .maintop { flex-wrap: wrap; padding: var(--space-4); }
  .search { flex-basis: 100%; max-width: none; }
  .messagelist { margin: 0 var(--space-4) var(--space-4); }
  .row__line1, .row__line2 { flex-wrap: wrap; }
  .row__to { max-width: 100%; }
  .drawer { padding: var(--space-5); }
}

@media (prefers-reduced-motion: reduce) {
  .drawer, .row, .navitem, .btn { transition-duration: 1ms; }
}