:root {
  --bg: #faf7f2;
  --surface: #ffffff;
  --ink: #2b2620;
  --muted: #8a8177;
  --accent: #c0392b;
  --accent-soft: #f6e3e0;
  --tutor: #fdf3e3;
  --border: #e8e1d6;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1a17;
    --surface: #29251f;
    --ink: #f0eae2;
    --muted: #9c948a;
    --accent: #e2604f;
    --accent-soft: #3d2723;
    --tutor: #322a1e;
    --border: #3a342c;
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: Georgia, 'Times New Roman', serif;
  background: var(--bg);
  color: var(--ink);
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px 6px;
}

h1 { font-size: 1.2rem; margin: 0; white-space: nowrap; }
@media (max-width: 480px) {
  h1 { font-size: 1rem; }
  .tagline { display: none; }
}
.flag { font-size: 0.95rem; }
.tagline { margin: 2px 0 0; color: var(--muted); font-size: 0.85rem; font-style: italic; }

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.account {
  font-family: system-ui, sans-serif;
  font-size: 0.8rem;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  max-width: 40vw;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.account:hover { border-color: var(--accent); }

.badge {
  background: var(--accent);
  color: #fff;
  font-family: system-ui, sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 999px;
}
.hidden { display: none; }

nav#modes {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 18px;
  scrollbar-width: none;
}
nav#modes::-webkit-scrollbar { display: none; }

nav#modes button {
  flex: 0 0 auto;
  font-family: system-ui, sans-serif;
  font-size: 0.85rem;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  transition: background 0.15s;
}
nav#modes button:hover { background: var(--accent-soft); border-color: var(--accent); }

main#chat {
  flex: 1;
  overflow-y: auto;
  padding: 12px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.msg {
  max-width: min(680px, 88%);
  padding: 12px 16px;
  border-radius: var(--radius);
  line-height: 1.5;
  font-size: 0.98rem;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}
.msg.user {
  align-self: flex-end;
  background: var(--accent-soft);
  border-bottom-right-radius: 4px;
}
.msg.tutor {
  align-self: flex-start;
  background: var(--tutor);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}
.msg.error {
  align-self: center;
  background: transparent;
  color: var(--accent);
  border: 1px dashed var(--accent);
  font-family: system-ui, sans-serif;
  font-size: 0.85rem;
}
.msg.tutor.thinking::after {
  content: '···';
  animation: pulse 1s infinite;
  color: var(--muted);
}
@keyframes pulse { 50% { opacity: 0.3; } }

.welcome {
  align-self: center;
  text-align: center;
  color: var(--muted);
  max-width: 480px;
  margin-top: 8vh;
  font-size: 0.95rem;
}
.welcome strong { color: var(--ink); }

form#composer {
  display: flex;
  gap: 10px;
  padding: 12px 18px calc(14px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  background: var(--surface);
}

#input {
  flex: 1;
  resize: none;
  font: inherit;
  font-size: 1rem;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
  max-height: 140px;
}
#input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

#send {
  align-self: flex-end;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
}
#send:disabled { opacity: 0.5; cursor: default; }

#mic {
  align-self: flex-end;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  font-size: 1.1rem;
  cursor: pointer;
}
#mic.rec {
  background: var(--accent);
  border-color: var(--accent);
  animation: pulse 1s infinite;
}

.icon-btn {
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.95rem;
  padding: 5px 10px;
  cursor: pointer;
}
.icon-btn.on { border-color: var(--accent); background: var(--accent-soft); }

/* Pannello Progressi */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  z-index: 10;
}
.panel {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 560px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  padding: 20px;
}
.panel h2 { margin: 0 0 4px; font-size: 1.05rem; }
.panel h3 { margin: 16px 0 6px; font-size: 0.9rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.panel ul { margin: 4px 0; padding-left: 20px; }
.panel li { margin: 3px 0; font-size: 0.92rem; }
.panel .close {
  float: right;
  border: none;
  background: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--muted);
}
.panel .level {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-family: system-ui, sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  margin: 6px 0;
}
.panel .muted { color: var(--muted); font-size: 0.9rem; }

.login-form {
  display: flex;
  gap: 8px;
  margin: 12px 0;
}
.login-form input {
  flex: 1;
  font: inherit;
  font-size: 0.95rem;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
}
.login-form button,
.panel-btn {
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
.panel-btn {
  background: var(--surface);
  color: var(--ink);
}
.panel-btn:hover { border-color: var(--accent); }
.panel-btn.danger { color: var(--accent); border-color: var(--accent); }
.panel-btn.danger:hover { background: var(--accent); color: #fff; }

/* Schermata di accesso (prima della webapp) */
.gate {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.gate.hidden { display: none; } /* .gate vince in specificità su .hidden */
.gate-card {
  width: 100%;
  max-width: 380px;
  text-align: center;
}
.gate-card h1 { font-size: 1.5rem; white-space: normal; }
.gate-card .tagline { display: block; margin-bottom: 24px; }
.gate-card form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.gate-card input {
  font: inherit;
  font-size: 1rem;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--ink);
}
.gate-card input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.gate-card button {
  font-family: system-ui, sans-serif;
  font-size: 1rem;
  padding: 12px;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
.gate-card button.secondary {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--border);
}
.gate-card button.secondary:hover { border-color: var(--accent); }
.gate-card button:disabled { opacity: 0.6; cursor: default; }
.gate-msg { min-height: 1.2em; color: var(--accent); font-size: 0.9rem; font-family: system-ui, sans-serif; }
.gate-msg.ok { color: var(--muted); }