:root {
  --bg: #0f1419;
  --bg2: #1a222c;
  --ink: #e8eef4;
  --muted: #9aa8b5;
  --accent: #3d8bfd;
  --accent2: #7dd3c0;
  --danger: #f07178;
  --warn: #e6c07b;
  --line: rgba(255, 255, 255, 0.08);
  --radius: 14px;
  --font: "Figtree", system-ui, sans-serif;
  --display: "Fraunces", Georgia, serif;
}

* { box-sizing: border-box; }

html, body, #app {
  height: 100%;
  margin: 0;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(61, 139, 253, 0.18), transparent),
    radial-gradient(900px 500px at 100% 0%, rgba(125, 211, 192, 0.12), transparent),
    var(--bg);
}

body.page-app {
  overflow: hidden;
}

.page-login {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 2rem;
}
.login-shell { width: min(420px, 100%); display: grid; gap: 1.5rem; }
.login-brand .eyebrow {
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent2);
  font-size: 0.75rem;
  margin: 0 0 0.4rem;
}
.login-brand h1 { font-family: var(--display); font-size: 2.6rem; margin: 0; }
.login-brand .lede { color: var(--muted); margin: 0.4rem 0 0; }
.login-card {
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: grid;
  gap: 0.9rem;
}
.login-card label { display: grid; gap: 0.35rem; font-size: 0.9rem; color: var(--muted); }
.login-card input {
  border: 1px solid var(--line);
  background: #0c1015;
  color: var(--ink);
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
}
.btn-primary {
  border: 0;
  border-radius: 999px;
  padding: 0.7rem 1rem;
  background: linear-gradient(135deg, var(--accent), #5a6cff);
  color: white;
  font-weight: 600;
  cursor: pointer;
  font: inherit;
}
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.form-error { color: var(--danger); margin: 0; }

/* Shell a colonna: topbar fissa, corpo che riempie lo schermo */
.app-shell {
  height: 100%;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 40;
  background: rgba(14, 18, 24, 0.9);
  backdrop-filter: blur(8px);
  flex: 0 0 auto;
}
.brand {
  font-family: var(--display);
  font-size: 1.35rem;
  margin-right: auto;
}
.brand span {
  color: #e85d5d;
  font-size: inherit;
  margin-left: 0.35rem;
}
.hamburger {
  display: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  cursor: pointer;
}
.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  border: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 30;
}
.topbar-menus {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.user-chip {
  color: var(--muted);
  font-size: 0.85rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.nav { display: flex; gap: 0.35rem; }
.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  font-size: 0.9rem;
}
.nav a.active, .nav a:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.06);
}
.menu-chat-settings { display: flex; gap: 0.5rem; align-items: center; }
.ctrl {
  display: grid;
  gap: 0.15rem;
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.ctrl select {
  font: inherit;
  font-size: 0.85rem;
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink);
  background: #0c1015;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.35rem 0.45rem;
}
.top-actions { display: flex; gap: 0.4rem; }
.btn-ghost, .btn-danger {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.btn-danger {
  border-color: rgba(240, 113, 120, 0.45);
  color: var(--danger);
}
.btn-ghost:disabled, .btn-danger:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-mic.listening {
  border-color: rgba(125, 211, 192, 0.6);
  color: var(--accent2);
}

.banner-warn {
  flex: 0 0 auto;
  background: rgba(230, 192, 123, 0.12);
  border-bottom: 1px solid rgba(230, 192, 123, 0.35);
  color: var(--warn);
  padding: 0.65rem 1rem;
  font-size: 0.9rem;
}
.banner-warn code { color: var(--ink); }

.page-body {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.chat-body {
  overflow: hidden;
}

.chat-toolbar {
  display: flex;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
  flex: 0 0 auto;
}
.conv-toggle { display: none; }

.chat-layout {
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: 280px 1fr;
  overflow: hidden;
  position: relative;
}

.sidebar {
  border-right: 1px solid var(--line);
  background: rgba(14, 18, 24, 0.85);
  padding: 1rem;
  overflow: auto;
  min-height: 0;
}
.sidebar h2 { margin: 0 0 0.75rem; font-size: 0.95rem; color: var(--muted); font-weight: 600; }
.conv-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.3rem; }
.conv-item, .conv-list > li > button {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
  cursor: pointer;
  font: inherit;
}
.conv-item:hover, .conv-item.active, .conv-item.selected {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line);
}
.conv-item.selected {
  background: rgba(61, 139, 253, 0.16);
  border-color: rgba(61, 139, 253, 0.4);
}
.muted { color: var(--muted); font-size: 0.9rem; }
.conv-backdrop { display: none; }

.thread-wrap {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.messages {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.bubble {
  max-width: min(760px, 92%);
  padding: 0.85rem 1rem;
  border-radius: 16px;
  line-height: 1.45;
  white-space: pre-wrap;
}
.bubble.user {
  align-self: flex-end;
  background: rgba(61, 139, 253, 0.18);
  border: 1px solid rgba(61, 139, 253, 0.28);
}
.bubble.assistant, .bubble.system {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
}
.bubble.system { color: var(--muted); font-size: 0.92rem; }
.bubble.assistant { white-space: normal; }
.bubble.assistant p { margin: 0 0 0.6rem; }
.bubble.assistant p:last-child { margin-bottom: 0; }
.bubble.assistant ul, .bubble.assistant ol { margin: 0.4rem 0 0.6rem 1.1rem; }
.bubble.assistant code {
  background: rgba(0, 0, 0, 0.35);
  padding: 0.1rem 0.35rem;
  border-radius: 6px;
  font-size: 0.9em;
}
.bubble.assistant pre {
  background: rgba(0, 0, 0, 0.35);
  padding: 0.75rem;
  border-radius: 10px;
  overflow: auto;
}
.bubble.assistant pre code { background: none; padding: 0; }

.run-status {
  margin: 0;
  padding: 0 1.25rem 0.35rem;
  color: var(--muted);
  font-size: 0.85rem;
  flex: 0 0 auto;
}

.composer {
  border-top: 1px solid var(--line);
  padding: 1rem 1.25rem 1.25rem;
  display: grid;
  gap: 0.6rem;
  flex: 0 0 auto;
}
.composer textarea {
  width: 100%;
  min-height: 88px;
  resize: vertical;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #0c1015;
  color: var(--ink);
  padding: 0.85rem 1rem;
  font: inherit;
}
.composer-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}
.composer-buttons {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  flex-wrap: wrap;
  margin-left: auto;
}
.designed-by {
  color: var(--muted);
  font-size: 0.8rem;
  text-decoration: none;
}
.designed-by:hover {
  color: var(--ink);
  text-decoration: underline;
}

@media (max-width: 900px) {
  .hamburger { display: inline-flex; align-items: center; justify-content: center; }
  .topbar-menus {
    display: none;
    position: absolute;
    top: 100%;
    right: 0.75rem;
    left: 0.75rem;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg2);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 0.85rem;
    z-index: 40;
  }
  .topbar-menus.is-open { display: flex; }
  .nav-backdrop.is-open { display: block; }
  .nav { flex-direction: column; }
  .menu-chat-settings { flex-direction: column; align-items: stretch; }
  .conv-toggle { display: inline-flex; }
  .chat-layout { grid-template-columns: 1fr; }
  .sidebar {
    display: none;
    position: fixed;
    inset: 0 0 0 auto;
    width: min(320px, 88vw);
    z-index: 35;
    border-left: 1px solid var(--line);
    border-right: 0;
    padding-top: 4.5rem;
  }
  .sidebar.is-open { display: block; }
  .conv-backdrop.is-open {
    display: block;
    position: fixed;
    inset: 0;
    border: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 34;
  }
}