/* DPK Assistant — design system (identité DP Kernel : navy + teal + violet). */
:root {
  --bg: #07111f;
  --bg-soft: #0c1728;
  --panel: #0d1728;
  --panel-2: #101d33;
  --panel-strong: #09101d;
  --text: #edf3fb;
  --muted: #aab9cc;
  --faint: #6d7f96;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --primary: #3dd6c6;
  --primary-strong: #22b8a6;
  --accent: #7c5cff;
  --gold: #ffcf70;
  --success: #62db95;
  --danger: #ff6b6b;
  --radius: 20px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --sidebar-w: 288px;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.35);
  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f4f7fb; --bg-soft: #eef3f9;
    --panel: #ffffff; --panel-2: #f6f9fd; --panel-strong: #ffffff;
    --text: #0f1c2e; --muted: #55657a; --faint: #8593a6;
    --line: rgba(15, 28, 46, 0.10); --line-strong: rgba(15, 28, 46, 0.18);
    --shadow: 0 18px 50px rgba(15, 28, 46, 0.12);
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #f4f7fb; --bg-soft: #eef3f9;
  --panel: #ffffff; --panel-2: #f6f9fd; --panel-strong: #ffffff;
  --text: #0f1c2e; --muted: #55657a; --faint: #8593a6;
  --line: rgba(15, 28, 46, 0.10); --line-strong: rgba(15, 28, 46, 0.18);
  --shadow: 0 18px 50px rgba(15, 28, 46, 0.12);
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; font-family: var(--font); color: var(--text);
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(124, 92, 255, 0.10), transparent 60%),
    radial-gradient(1000px 500px at 110% 10%, rgba(61, 214, 198, 0.08), transparent 55%),
    var(--bg);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  overscroll-behavior: none;
}
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 6px; }
[hidden] { display: none !important; }

.shell { display: grid; grid-template-columns: var(--sidebar-w) 1fr; height: 100dvh; }
.shell.collapsed { grid-template-columns: 0 1fr; }

.sidebar {
  min-width: 0; background: linear-gradient(180deg, var(--panel-strong), var(--panel));
  border-right: 1px solid var(--line); display: flex; flex-direction: column;
  overflow: hidden; transition: transform .22s ease;
}
.sidebar-head { padding: 14px 14px 8px; display: flex; align-items: center; gap: 10px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .2px; }
.brand .mark {
  width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent)); color: #06121f;
  font-weight: 800; font-size: 14px; flex: none;
}
.newbtn {
  margin: 8px 12px 6px; padding: 11px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong); background: var(--panel-2); color: var(--text);
  display: flex; align-items: center; gap: 10px; font-weight: 600; width: calc(100% - 24px);
  transition: border-color .15s, transform .05s;
}
.newbtn:hover { border-color: var(--primary); }
.newbtn:active { transform: translateY(1px); }
.newbtn .plus { color: var(--primary); font-size: 18px; line-height: 1; }
.search { margin: 4px 12px 8px; }
.search input {
  width: 100%; padding: 9px 12px; border-radius: var(--radius-pill);
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
}
.search input::placeholder { color: var(--faint); }

.convs { flex: 1; overflow-y: auto; padding: 4px 8px 8px; scrollbar-width: thin; }
.conv-group-title {
  padding: 12px 10px 6px; font-size: 11px; text-transform: uppercase;
  letter-spacing: .09em; color: var(--faint); font-weight: 700;
}
.conv {
  display: flex; align-items: center; gap: 8px; padding: 9px 10px; border-radius: 10px;
  color: var(--muted); cursor: pointer; position: relative; user-select: none;
}
.conv:hover { background: var(--panel-2); color: var(--text); }
.conv.active { background: color-mix(in srgb, var(--primary) 16%, transparent); color: var(--text); }
.conv .title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; }
.conv .menu-btn { opacity: 0; border: 0; background: transparent; color: var(--faint); padding: 2px 6px; border-radius: 6px; }
.conv:hover .menu-btn, .conv.active .menu-btn { opacity: 1; }
.conv .menu-btn:hover { background: var(--line-strong); color: var(--text); }

.sidebar-foot { border-top: 1px solid var(--line); padding: 10px 12px; }
.profile { display: flex; align-items: center; gap: 10px; padding: 6px; border-radius: 10px; }
.avatar {
  width: 34px; height: 34px; border-radius: 50%; flex: none; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--primary)); color: #06121f; font-weight: 700;
}
.profile .who { min-width: 0; flex: 1; }
.profile .who .n { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.profile .who .c { font-size: 12px; color: var(--faint); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.main { min-width: 0; display: flex; flex-direction: column; height: 100dvh; }
.topbar {
  display: flex; align-items: center; gap: 12px; padding: 12px 16px;
  border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--bg) 70%, transparent);
  backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 5;
  padding-top: max(12px, env(safe-area-inset-top));
}
.icon-btn {
  width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--panel-2); display: grid; place-items: center; flex: none;
}
.icon-btn:hover { border-color: var(--primary); }
.topbar .heading { font-weight: 600; font-size: 15px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar .spacer { flex: 1; }

.stream { flex: 1; overflow-y: auto; scroll-behavior: smooth; overscroll-behavior: contain; }
.thread { max-width: 760px; margin: 0 auto; padding: 24px 20px 8px; }

.hero { max-width: 640px; margin: 8vh auto 0; text-align: center; padding: 0 20px; }
.hero .mark-lg {
  width: 62px; height: 62px; border-radius: 18px; margin: 0 auto 18px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent)); color: #06121f; font-weight: 800; font-size: 26px;
}
.hero h1 { font-size: 26px; margin: 0 0 8px; letter-spacing: -.02em; text-wrap: balance; }
.hero p { color: var(--muted); margin: 0 0 22px; }
.suggests { display: grid; gap: 10px; grid-template-columns: 1fr 1fr; }
.suggest {
  text-align: left; padding: 14px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--line); background: var(--panel); color: var(--text);
  transition: border-color .15s, transform .05s;
}
.suggest:hover { border-color: var(--primary); }
.suggest:active { transform: translateY(1px); }
.suggest b { display: block; font-size: 14px; }
.suggest span { color: var(--faint); font-size: 13px; }

.msg { display: flex; gap: 12px; padding: 14px 0; }
.msg .role-ava { width: 30px; height: 30px; border-radius: 9px; flex: none; display: grid; place-items: center; font-size: 13px; font-weight: 700; }
.msg.user .role-ava { background: var(--panel-2); color: var(--muted); border: 1px solid var(--line); }
.msg.assistant .role-ava { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #06121f; }
.msg .body { min-width: 0; flex: 1; }
.msg .name { font-size: 12px; color: var(--faint); margin-bottom: 3px; }
.bubble { line-height: 1.62; font-size: 15px; overflow-wrap: anywhere; }
.bubble p { margin: 0 0 10px; }
.bubble p:last-child { margin-bottom: 0; }
.bubble ul, .bubble ol { margin: 0 0 10px; padding-left: 22px; }
.bubble li { margin: 3px 0; }
.bubble code { background: var(--panel-2); padding: 2px 6px; border-radius: 6px; font-size: 13px; }
.bubble pre { background: var(--panel-strong); border: 1px solid var(--line); padding: 12px 14px; border-radius: 12px; overflow-x: auto; }
.bubble pre code { background: none; padding: 0; }
.bubble strong { font-weight: 700; }
.bubble a { color: var(--primary); text-decoration: underline; }
.bubble table { border-collapse: collapse; width: 100%; margin: 0 0 10px; font-size: 14px; }
.bubble th, .bubble td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }

.msg-actions { display: flex; gap: 8px; margin-top: 8px; opacity: 0; transition: opacity .12s; }
.msg.assistant:hover .msg-actions { opacity: 1; }
.mini-btn { font-size: 12px; color: var(--faint); background: transparent; border: 1px solid var(--line); padding: 4px 9px; border-radius: var(--radius-pill); }
.mini-btn:hover { color: var(--text); border-color: var(--line-strong); }
.sources { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.source-chip { font-size: 12px; color: var(--muted); background: var(--panel-2); border: 1px solid var(--line); padding: 3px 10px; border-radius: var(--radius-pill); }

.cursor { display: inline-block; width: 8px; height: 16px; margin-left: 1px; background: var(--primary); border-radius: 2px; vertical-align: text-bottom; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.thinking { color: var(--faint); font-size: 14px; display: inline-flex; gap: 6px; align-items: center; }
.thinking .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--faint); animation: pulse 1.2s ease-in-out infinite; }
.thinking .dot:nth-child(2) { animation-delay: .2s; } .thinking .dot:nth-child(3) { animation-delay: .4s; }
@keyframes pulse { 0%,100% { opacity: .3; transform: translateY(0); } 50% { opacity: 1; transform: translateY(-3px); } }

.composer-wrap { padding: 10px 16px calc(14px + env(safe-area-inset-bottom)); background: linear-gradient(180deg, transparent, var(--bg) 40%); }
.composer { max-width: 760px; margin: 0 auto; display: flex; align-items: flex-end; gap: 8px;
  background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: 8px 8px 8px 16px; box-shadow: var(--shadow); }
.composer:focus-within { border-color: var(--primary); }
.composer textarea {
  flex: 1; border: 0; background: transparent; color: var(--text); resize: none; font: inherit;
  line-height: 1.5; max-height: 200px; padding: 8px 0; outline: none;
}
.composer textarea::placeholder { color: var(--faint); }
.send-btn {
  width: 40px; height: 40px; border-radius: 12px; border: 0; flex: none; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong)); color: #06121f; transition: opacity .15s, transform .05s;
}
.send-btn:disabled { opacity: .4; cursor: not-allowed; }
.send-btn:not(:disabled):active { transform: translateY(1px); }
.composer-hint { max-width: 760px; margin: 6px auto 0; text-align: center; color: var(--faint); font-size: 12px; }

.overlay { position: fixed; inset: 0; background: rgba(3, 8, 16, 0.55); z-index: 8; opacity: 0; pointer-events: none; transition: opacity .2s; }
.overlay.show { opacity: 1; pointer-events: auto; }

.ctx { position: fixed; z-index: 30; background: var(--panel-strong); border: 1px solid var(--line-strong); border-radius: 12px; box-shadow: var(--shadow); padding: 6px; min-width: 170px; }
.ctx button { display: flex; align-items: center; gap: 10px; width: 100%; padding: 9px 12px; border: 0; background: transparent; color: var(--text); border-radius: 8px; font-size: 14px; text-align: left; }
.ctx button:hover { background: var(--panel-2); }
.ctx button.danger { color: var(--danger); }

.toast { position: fixed; bottom: calc(20px + env(safe-area-inset-bottom)); left: 50%; transform: translateX(-50%); background: var(--panel-strong); border: 1px solid var(--line-strong); color: var(--text); padding: 10px 16px; border-radius: var(--radius-pill); box-shadow: var(--shadow); z-index: 40; font-size: 14px; }

.install-bar { max-width: 760px; margin: 0 auto 8px; display: flex; align-items: center; gap: 10px; background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 10px 14px; }
.install-bar .grow { flex: 1; font-size: 14px; }

@media (max-width: 820px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: fixed; z-index: 10; width: min(86vw, var(--sidebar-w)); height: 100dvh; transform: translateX(-102%); box-shadow: var(--shadow); }
  .shell.drawer-open .sidebar { transform: translateX(0); }
  .thread, .composer, .composer-hint, .install-bar { max-width: 100%; }
}
@media (min-width: 821px) { .only-mobile { display: none !important; } }

.auth-wrap { min-height: 100dvh; display: grid; place-items: center; padding: 24px; }
.auth-card { width: 100%; max-width: 420px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px 26px; }
.auth-card .mark-lg { width: 54px; height: 54px; border-radius: 16px; display: grid; place-items: center; background: linear-gradient(135deg, var(--primary), var(--accent)); color: #06121f; font-weight: 800; font-size: 22px; margin-bottom: 18px; }
.auth-card h1 { font-size: 22px; margin: 0 0 6px; letter-spacing: -.02em; }
.auth-card p.sub { color: var(--muted); margin: 0 0 20px; font-size: 14px; line-height: 1.5; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.field input {
  width: 100%; padding: 13px 14px; border-radius: var(--radius-sm); border: 1px solid var(--line-strong);
  background: var(--panel-2); color: var(--text); font-size: 16px; letter-spacing: .04em;
}
.field input.code { text-align: center; font-size: 24px; letter-spacing: .35em; font-weight: 700; text-transform: uppercase; }
.field input:focus { outline: none; border-color: var(--primary); }
.btn-primary {
  width: 100%; padding: 13px; border: 0; border-radius: var(--radius-sm); font-weight: 700; font-size: 15px;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong)); color: #06121f; transition: opacity .15s, transform .05s;
}
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary:not(:disabled):active { transform: translateY(1px); }
.auth-msg { margin-top: 14px; font-size: 14px; text-align: center; min-height: 20px; }
.auth-msg.err { color: var(--danger); }
.auth-msg.ok { color: var(--success); }
.pending { text-align: center; }
.spinner { width: 44px; height: 44px; border-radius: 50%; border: 3px solid var(--line-strong); border-top-color: var(--primary); margin: 0 auto 18px; animation: spin 0.9s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.ios-guide { margin-top: 18px; padding: 14px; border: 1px dashed var(--line-strong); border-radius: var(--radius-sm); font-size: 13px; color: var(--muted); line-height: 1.6; }

@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }