/* src/App.css */

/* =========================
   RESET & BASE
   ========================= */
html, body, #root {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden; /* lo scroll è gestito dal main della chat */
}

body {
  background-color: var(--bs-body-bg);
  font-family: sans-serif;
}

/* =========================
   SESSIONS WRAPPER & OFFCANVAS
   ========================= */
.sessions-wrapper {
  transition: transform 300ms ease, filter 300ms ease;
  will-change: transform, filter;
}

body.sessions-open .sessions-wrapper {
  transform: translateX(280px) scale(0.985);
  filter: saturate(0.95);
}

.sessions-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity 250ms ease;
  z-index: 1030; /* sotto offcanvas (Bootstrap .offcanvas = 1045) */
}

.sessions-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.offcanvas-start {
  width: 280px;
  border-right: 1px solid #dee2e6;
}

.offcanvas.show {
  box-shadow: 6px 0 20px rgba(0, 0, 0, 0.08);
}

.offcanvas-left {
  position: fixed;
  top: 0;
  left: -280px;
  width: 280px;
  height: 100%;
  background: var(--bs-body-bg, #fff);
  box-shadow: 2px 0 5px rgba(0,0,0,0.3);
  transition: left 0.3s ease;
  z-index: 1050;
}

.offcanvas-left.show {
  left: 0;
}

.session-table {
  font-size: 0.85rem;
}

/* =========================
   CHAT LAYOUT
   ========================= */
.chat-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.chat-layout > .flex-grow-1 {
  flex: 1;
  min-height: 0; /* fondamentale per Safari iOS */
  overflow-y: auto;
}

.chat-layout footer {
  flex-shrink: 0;
}

/* =========================
   CHAT STYLES
   ========================= */
.chat-box {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  background-color: #f8f9fa;
  overflow-anchor: none;
}

.message {
  margin: 0.5rem 0;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  width: auto;
  max-width: 95%;
  word-wrap: break-word;
}

.message:last-child {
  overflow-anchor: auto;
}

@media (min-width: 768px) {
  .message { max-width: 75%; }
}

.message.user {
  background-color: #0d6efd;
  color: #fff;
  align-self: flex-end;
  text-align: right;
  border-top-right-radius: 0;
}

.message.assistant {
  background-color: #e9ecef;
  color: #212529;
  align-self: flex-start;
  text-align: left;
  border-top-left-radius: 0;
}

/* =========================
   INPUT BAR
   ========================= */
.input-bar {
  display: flex;
  padding: 1rem;
  background-color: white;
  border-top: 1px solid #ccc;
}

.chat-input {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 1rem;
}

.send-button {
  margin-left: 0.5rem;
  padding: 0.75rem 1rem;
  background-color: #0d6efd;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

/* =========================
   CODE BLOCKS
   ========================= */
pre {
  background-color: #212529;
  color: #f8f9fa;
  padding: 0.75rem;
  border-radius: 0.375rem;
  overflow-x: auto;
}

code {
  font-family: 'Fira Code', monospace;
  font-size: 0.9rem;
}

.btn-copy {
  font-size: 0.75rem;
}

/* =========================
   THINKING BLOCK (limit growth)
   ========================= */
.message.thinking {
  max-height: 40vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.think-block {
  opacity: 1;
  transition: opacity 0.6s ease;
  max-height: 40vh;       /* non occupa più del 40% dell'altezza viewport */
  overflow-y: auto;       /* scroll interno se il contenuto è troppo */
  padding: 0.5rem;        /* un po’ di respiro interno */
  box-sizing: border-box; /* padding incluso nel calcolo altezza */
  background: rgba(0,0,0,0.03);
}

.think-block.fade-out {
  opacity: 0;
}