/* ===== G4X Tuner AI — styles ===== */
:root {
  --accent: #ff5a2c;          /* motorsport orange-red */
  --accent-2: #ff8a3d;
  --accent-glow: rgba(255, 90, 44, 0.35);

  --bg: #0b0d12;
  --bg-elev: #12151c;
  --sidebar: #0e1117;
  --panel: #171b24;
  --panel-2: #1d222d;
  --border: #232936;
  --border-soft: #1b2029;

  --text: #e9ecf2;
  --text-dim: #a3abbb;
  --text-faint: #6b7385;

  --user-bubble: #1f2632;
  --code-bg: #0c0f15;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 40px rgba(0,0,0,0.45);
  --sidebar-w: 280px;

  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

:root[data-theme="light"] {
  --bg: #f6f7f9;
  --bg-elev: #ffffff;
  --sidebar: #f0f2f5;
  --panel: #ffffff;
  --panel-2: #f2f4f7;
  --border: #e2e6ec;
  --border-soft: #edf0f4;
  --text: #1b2027;
  --text-dim: #545c6b;
  --text-faint: #8a93a3;
  --user-bubble: #eef1f6;
  --code-bg: #f2f4f7;
  --shadow: 0 10px 40px rgba(20,30,50,0.12);
}

* { box-sizing: border-box; }
html, body {
  margin: 0; height: 100%;
  overscroll-behavior-y: none;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}
a { color: var(--accent-2); }

.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  height: 100dvh;
  overflow: hidden;
}

/* ===== Sidebar ===== */
.sidebar {
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: calc(12px + var(--safe-top)) 12px 12px;
  min-width: 0;
  z-index: 40;
}
.sidebar-top {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .2px; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 8px;
  background: radial-gradient(120% 120% at 30% 20%, var(--accent-2), var(--accent) 60%, #b3260f);
  box-shadow: 0 0 0 1px rgba(255,255,255,.08) inset, 0 6px 16px var(--accent-glow);
  position: relative; flex: none;
}
.brand-mark::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(115deg, transparent 42%, rgba(255,255,255,.9) 46%, transparent 50%),
    linear-gradient(115deg, transparent 55%, rgba(255,255,255,.5) 58%, transparent 62%);
  border-radius: 8px;
}
.brand-name { font-size: 16px; }
.brand-ai { color: var(--accent-2); }

.new-chat {
  display: flex; align-items: center; gap: 8px; justify-content: center;
  width: 100%; padding: 11px 14px; margin-bottom: 14px;
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  color: #fff; border: none; border-radius: 12px;
  font-size: 14.5px; font-weight: 600; cursor: pointer;
  box-shadow: 0 6px 18px var(--accent-glow);
  transition: transform .08s ease, filter .15s ease;
}
.new-chat:hover { filter: brightness(1.05); }
.new-chat:active { transform: translateY(1px); }

.history { flex: 1; overflow-y: auto; margin: 0 -6px; padding: 0 6px; }
.history::-webkit-scrollbar, .chat::-webkit-scrollbar { width: 8px; }
.history::-webkit-scrollbar-thumb, .chat::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }

.history-item {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 10px; border-radius: 10px; cursor: pointer;
  color: var(--text-dim); font-size: 14px;
  position: relative; margin-bottom: 2px;
  white-space: nowrap; overflow: hidden;
}
.history-item:hover { background: var(--panel); color: var(--text); }
.history-item.active { background: var(--panel-2); color: var(--text); }
.history-item .hi-title { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.history-item .hi-del {
  opacity: 0; border: none; background: transparent; color: var(--text-faint);
  cursor: pointer; padding: 2px; border-radius: 6px; flex: none;
}
.history-item:hover .hi-del { opacity: 1; }
.history-item .hi-del:hover { color: var(--accent); background: var(--bg); }
.history-empty { color: var(--text-faint); font-size: 13px; padding: 10px; text-align: center; }

.sidebar-bottom { border-top: 1px solid var(--border-soft); padding-top: 10px; margin-top: 6px; }
.side-link {
  display: flex; align-items: center; gap: 10px; width: 100%;
  background: transparent; border: none; color: var(--text-dim);
  padding: 10px; border-radius: 10px; cursor: pointer; font-size: 14px; text-align: left;
}
.side-link:hover { background: var(--panel); color: var(--text); }
.disclaimer { color: var(--text-faint); font-size: 11px; line-height: 1.4; padding: 8px 10px 2px; }

.sidebar-close { display: none; }
.sidebar-scrim { display: none; }

/* ===== Main ===== */
.main { display: flex; flex-direction: column; min-width: 0; height: 100dvh; position: relative; }

.topbar {
  display: flex; align-items: center; gap: 8px;
  padding: calc(10px + var(--safe-top)) 14px 10px;
  border-bottom: 1px solid var(--border-soft);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.2) blur(8px);
}
.topbar-title { flex: 1; font-size: 15px; font-weight: 600; color: var(--text-dim);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#menuBtn { display: none; }
.icon-btn {
  background: transparent; border: none; color: var(--text-dim);
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  cursor: pointer;
}
.icon-btn:hover { background: var(--panel); color: var(--text); }

.chat { flex: 1; overflow-y: auto; padding: 22px 0 8px; scroll-behavior: smooth; }
.thread { max-width: 780px; margin: 0 auto; padding: 0 18px; }

/* Messages */
.msg { display: flex; gap: 14px; padding: 14px 0; }
.avatar {
  width: 30px; height: 30px; border-radius: 9px; flex: none; display: grid; place-items: center;
  font-size: 13px; font-weight: 700; color: #fff; margin-top: 2px;
}
.avatar.ai { background: radial-gradient(120% 120% at 30% 20%, var(--accent-2), var(--accent) 60%, #b3260f);
  box-shadow: 0 4px 12px var(--accent-glow); }
.avatar.user { background: var(--panel-2); color: var(--text-dim); border: 1px solid var(--border); }
.msg-body { min-width: 0; flex: 1; }
.msg-role { font-size: 12.5px; color: var(--text-faint); margin-bottom: 3px; font-weight: 600; }

.bubble { font-size: 15.5px; line-height: 1.65; color: var(--text); word-wrap: break-word; }
.bubble.user-bubble {
  background: var(--user-bubble); border: 1px solid var(--border-soft);
  padding: 10px 14px; border-radius: 14px; display: inline-block;
}
.bubble p { margin: 0 0 12px; }
.bubble p:last-child { margin-bottom: 0; }
.bubble h1,.bubble h2,.bubble h3,.bubble h4 { line-height: 1.3; margin: 18px 0 8px; }
.bubble h1 { font-size: 1.5em; } .bubble h2 { font-size: 1.3em; } .bubble h3 { font-size: 1.12em; }
.bubble ul,.bubble ol { margin: 4px 0 12px; padding-left: 22px; }
.bubble li { margin: 4px 0; }
.bubble strong { color: var(--text); font-weight: 700; }
.bubble a { text-decoration: underline; text-underline-offset: 2px; }
.bubble hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }
.bubble blockquote {
  margin: 8px 0; padding: 2px 14px; border-left: 3px solid var(--accent);
  color: var(--text-dim); background: var(--panel); border-radius: 0 8px 8px 0;
}
.bubble code {
  background: var(--code-bg); border: 1px solid var(--border-soft);
  padding: 1px 6px; border-radius: 6px; font-size: .88em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.code-block { margin: 12px 0; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--code-bg); }
.code-head { display: flex; align-items: center; justify-content: space-between;
  padding: 7px 12px; background: var(--panel); border-bottom: 1px solid var(--border); }
.code-lang { font-size: 12px; color: var(--text-faint); font-family: ui-monospace, monospace; }
.code-copy { background: transparent; border: 1px solid var(--border); color: var(--text-dim);
  font-size: 12px; padding: 3px 10px; border-radius: 7px; cursor: pointer; }
.code-copy:hover { color: var(--text); border-color: var(--text-faint); }
.code-block pre { margin: 0; padding: 12px 14px; overflow-x: auto; }
.code-block code { background: none; border: none; padding: 0; font-size: 13px; line-height: 1.55; }

.md-table-wrap { overflow-x: auto; margin: 12px 0; border: 1px solid var(--border); border-radius: 12px; }
.bubble table { border-collapse: collapse; width: 100%; font-size: 14px; }
.bubble th, .bubble td { padding: 9px 13px; text-align: left; border-bottom: 1px solid var(--border-soft); }
.bubble th { background: var(--panel); color: var(--text); font-weight: 600; white-space: nowrap; }
.bubble tr:last-child td { border-bottom: none; }

/* typing dots */
.typing { display: inline-flex; gap: 5px; padding: 6px 2px; }
.typing span { width: 7px; height: 7px; border-radius: 50%; background: var(--text-faint); animation: blink 1.3s infinite ease-in-out; }
.typing span:nth-child(2) { animation-delay: .18s; }
.typing span:nth-child(3) { animation-delay: .36s; }
@keyframes blink { 0%,80%,100% { opacity:.25; transform: translateY(0);} 40% { opacity:1; transform: translateY(-3px);} }
.cursor { display:inline-block; width:8px; height:1.05em; background: var(--accent); margin-left:2px; vertical-align:-2px; animation: caret 1s steps(1) infinite; border-radius:1px; }
@keyframes caret { 50% { opacity: 0; } }

/* ===== Welcome ===== */
.welcome { max-width: 760px; margin: 0 auto; padding: 6vh 20px 20px; text-align: center; }
.welcome-logo { width: 62px; height: 62px; margin: 0 auto 18px; border-radius: 18px;
  background: radial-gradient(120% 120% at 30% 20%, var(--accent-2), var(--accent) 60%, #b3260f);
  box-shadow: 0 10px 30px var(--accent-glow); position: relative; }
.welcome-logo::after { content:""; position:absolute; inset:0; border-radius:18px;
  background: linear-gradient(115deg, transparent 44%, rgba(255,255,255,.9) 48%, transparent 52%); }
.welcome h1 { font-size: 27px; margin: 0 0 8px; letter-spacing: -.3px; }
.welcome p { color: var(--text-dim); font-size: 15.5px; margin: 0 auto 26px; max-width: 540px; line-height:1.55; }
.suggestions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; text-align: left; }
.suggestion {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 14px 16px; cursor: pointer; transition: border-color .15s, transform .08s, background .15s;
}
.suggestion:hover { border-color: var(--accent); background: var(--panel-2); }
.suggestion:active { transform: translateY(1px); }
.suggestion .s-title { font-weight: 600; font-size: 14.5px; margin-bottom: 3px; }
.suggestion .s-sub { color: var(--text-faint); font-size: 13px; line-height: 1.4; }
.needs-key-banner {
  max-width: 760px; margin: 0 auto 18px; padding: 12px 16px; border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 14%, var(--panel)); border: 1px solid var(--accent);
  color: var(--text); font-size: 14px; display: flex; gap: 10px; align-items: center; justify-content: center; flex-wrap: wrap;
}
.needs-key-banner button { background: var(--accent); color:#fff; border:none; padding:7px 14px; border-radius:9px; font-weight:600; cursor:pointer; }

/* ===== Composer ===== */
.composer-wrap { padding: 4px 18px calc(12px + var(--safe-bottom)); background: linear-gradient(180deg, transparent, var(--bg) 40%); }
.composer {
  max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 6px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 22px;
  padding: 8px; box-shadow: var(--shadow);
  transition: border-color .15s;
}
.composer.drag-over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--panel)); }
.composer:focus-within { border-color: var(--accent); }
.composer-main { display: flex; align-items: flex-end; gap: 6px; }
.attach-btn {
  flex: none; width: 38px; height: 38px; border-radius: 50%; border: none; cursor: pointer;
  background: transparent; color: var(--text-dim); display: grid; place-items: center;
  transition: background .15s, color .15s;
}
.attach-btn:hover { background: var(--panel-2); color: var(--text); }

.attach-row { display: flex; flex-wrap: wrap; gap: 8px; padding: 4px 4px 2px; }
.attach-note { display: flex; align-items: flex-start; gap: 7px; width: 100%; padding: 6px 6px 2px;
  font-size: 12px; line-height: 1.4; color: var(--text-dim); }
.attach-note svg { color: var(--accent-2); flex: none; margin-top: 1px; }
.attach-note b { color: var(--text); font-weight: 600; }
.attach-chip {
  display: flex; align-items: center; gap: 8px; max-width: 220px;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px;
  padding: 6px 8px; font-size: 12.5px; color: var(--text);
}
.attach-chip img { width: 34px; height: 34px; border-radius: 6px; object-fit: cover; flex: none; }
.attach-chip .ac-ico { width: 28px; height: 34px; display: grid; place-items: center; color: var(--accent-2); flex: none; }
.attach-chip .ac-meta { min-width: 0; }
.attach-chip .ac-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }
.attach-chip .ac-sub { color: var(--text-faint); font-size: 11px; }
.attach-chip .ac-del { border: none; background: transparent; color: var(--text-faint); cursor: pointer; padding: 2px; border-radius: 6px; flex: none; }
.attach-chip .ac-del:hover { color: var(--accent); background: var(--bg); }

/* Attachments shown inside a sent user message */
.msg-attachments { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
.msg-attachments img { max-width: 220px; max-height: 200px; border-radius: 10px; border: 1px solid var(--border); }
.msg-att-file { display: inline-flex; align-items: center; gap: 8px; background: var(--panel-2);
  border: 1px solid var(--border); border-radius: 10px; padding: 8px 10px; font-size: 13px; color: var(--text); }
.msg-att-file svg { color: var(--accent-2); flex: none; }
.composer-input {
  flex: 1; resize: none; border: none; outline: none; background: transparent;
  color: var(--text); font: inherit; font-size: 15.5px; line-height: 1.5;
  max-height: 200px; padding: 8px 6px 8px 10px;
}
.composer-input::placeholder { color: var(--text-faint); }
.send-btn {
  flex: none; width: 40px; height: 40px; border-radius: 50%; border: none; cursor: pointer;
  background: linear-gradient(180deg, var(--accent-2), var(--accent)); color: #fff;
  display: grid; place-items: center; transition: transform .08s, filter .15s, opacity .15s;
  box-shadow: 0 4px 14px var(--accent-glow);
}
.send-btn:disabled { opacity: .4; cursor: default; box-shadow: none; }
.send-btn:not(:disabled):hover { filter: brightness(1.06); }
.send-btn:not(:disabled):active { transform: scale(.94); }
.send-btn.stop { background: var(--panel-2); color: var(--text); box-shadow: none; border: 1px solid var(--border); }
.composer-hint { max-width: 780px; margin: 8px auto 0; text-align: center; font-size: 11.5px; color: var(--text-faint); }

/* ===== Modal ===== */
.modal-scrim { position: fixed; inset: 0; background: rgba(0,0,0,.55); backdrop-filter: blur(3px);
  display: grid; place-items: center; z-index: 100; padding: 16px; }
.modal-scrim[hidden] { display: none; }
.modal { width: 100%; max-width: 480px; background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 18px; box-shadow: var(--shadow); max-height: 90dvh; display: flex; flex-direction: column; }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--border-soft); }
.modal-head h2 { margin: 0; font-size: 18px; }
.modal-body { padding: 18px; overflow-y: auto; }
.field-label { display: block; font-size: 13.5px; font-weight: 600; margin: 16px 0 6px; }
.field-label:first-child { margin-top: 0; }
.field-help { font-size: 13px; color: var(--text-dim); line-height: 1.5; margin: 0 0 10px; }
.text-input { width: 100%; background: var(--panel); border: 1px solid var(--border); color: var(--text);
  border-radius: 10px; padding: 11px 12px; font-size: 14.5px; outline: none; }
.text-input:focus { border-color: var(--accent); }
select.text-input { cursor: pointer; }
.key-row { display: flex; gap: 8px; }
.key-row .text-input { flex: 1; }
.ghost-btn { background: transparent; border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 10px; padding: 10px 14px; cursor: pointer; font-size: 14px; }
.ghost-btn:hover { color: var(--text); border-color: var(--text-faint); }
.primary-btn { background: linear-gradient(180deg, var(--accent-2), var(--accent)); color: #fff; border: none;
  border-radius: 10px; padding: 10px 20px; cursor: pointer; font-size: 14.5px; font-weight: 600; box-shadow: 0 4px 14px var(--accent-glow); }
.primary-btn:active { transform: translateY(1px); }
.seg { display: inline-flex; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 3px; gap: 3px; }
.seg-btn { background: transparent; border: none; color: var(--text-dim); padding: 7px 16px; border-radius: 8px; cursor: pointer; font-size: 13.5px; }
.seg-btn.active { background: var(--accent); color: #fff; }
.cloud-status { font-size: 13px; line-height: 1.5; color: var(--text-dim);
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; }
.cloud-status.off { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.cloud-status.on { color: var(--text); }
.cloud-status b { color: var(--text); }
.cloud-status code { background: var(--code-bg); border: 1px solid var(--border-soft); padding: 1px 5px; border-radius: 5px; font-size: .92em; }
.cloud-status a { color: var(--accent-2); }
.modal-status { margin-top: 14px; font-size: 13px; min-height: 18px; }
.modal-status.ok { color: #46c98b; } .modal-status.err { color: var(--accent); }
.modal-foot { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-top: 1px solid var(--border-soft); }

/* ===== Login overlay ===== */
.login-overlay { position: fixed; inset: 0; z-index: 200; display: grid; place-items: center;
  padding: 24px; background:
    radial-gradient(120% 90% at 50% -10%, color-mix(in srgb, var(--accent) 22%, var(--bg)), var(--bg) 60%); }
.login-overlay[hidden] { display: none; }
.login-card { width: 100%; max-width: 380px; text-align: center;
  background: var(--panel); border: 1px solid var(--border); border-radius: 20px;
  padding: 34px 26px calc(24px + var(--safe-bottom)); box-shadow: var(--shadow); }
.login-logo { width: 60px; height: 60px; margin: 0 auto 16px; border-radius: 17px;
  background: radial-gradient(120% 120% at 30% 20%, var(--accent-2), var(--accent) 60%, #b3260f);
  box-shadow: 0 10px 30px var(--accent-glow); position: relative; }
.login-logo::after { content:""; position:absolute; inset:0; border-radius:17px;
  background: linear-gradient(115deg, transparent 44%, rgba(255,255,255,.9) 48%, transparent 52%); }
.login-card h1 { font-size: 23px; margin: 0 0 6px; }
.login-card > p { color: var(--text-dim); font-size: 14.5px; margin: 0 0 22px; line-height: 1.5; }
.oauth-btn { display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%;
  padding: 12px 16px; margin-bottom: 10px; border-radius: 12px; font-size: 15px; font-weight: 600;
  cursor: pointer; border: 1px solid var(--border); transition: filter .15s, transform .08s; }
.oauth-btn:active { transform: translateY(1px); }
.oauth-btn.google { background: #fff; color: #1f1f1f; border-color: #dadce0; }
.oauth-btn.google:hover { filter: brightness(0.97); }
.oauth-btn.apple { background: #000; color: #fff; border-color: #000; }
.oauth-btn.apple:hover { filter: brightness(1.15); }
.oauth-guest { background: transparent; border: none; color: var(--text-dim); cursor: pointer;
  font-size: 14px; padding: 12px; margin-top: 6px; text-decoration: underline; text-underline-offset: 2px; }
.oauth-guest:hover { color: var(--text); }
.login-error { color: var(--accent); font-size: 13px; margin-top: 12px; min-height: 16px; }

/* Account chip in sidebar */
.account { display: flex; align-items: center; gap: 10px; padding: 8px 10px; margin-bottom: 6px;
  border-radius: 10px; background: var(--panel); border: 1px solid var(--border-soft); }
.account[hidden] { display: none; }
.account .acct-avatar { width: 30px; height: 30px; border-radius: 50%; flex: none; object-fit: cover;
  background: var(--panel-2); display: grid; place-items: center; color: var(--text-dim); font-weight: 700; font-size: 13px; }
.account .acct-meta { flex: 1; min-width: 0; }
.account .acct-name { font-size: 13.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account .acct-sub { font-size: 11px; color: var(--text-faint); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account .acct-out { border: none; background: transparent; color: var(--text-faint); cursor: pointer;
  padding: 5px; border-radius: 7px; flex: none; }
.account .acct-out:hover { color: var(--accent); background: var(--bg); }

/* ===== Mobile ===== */
@media (max-width: 820px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: fixed; inset: 0 auto 0 0; width: min(84vw, var(--sidebar-w));
    transform: translateX(-102%); transition: transform .24s ease; box-shadow: var(--shadow); }
  .app.sidebar-open .sidebar { transform: translateX(0); }
  .sidebar-close { display: grid; }
  .sidebar-scrim { display: block; position: fixed; inset: 0; background: rgba(0,0,0,.5);
    opacity: 0; pointer-events: none; transition: opacity .24s; z-index: 39; }
  .app.sidebar-open .sidebar-scrim { opacity: 1; pointer-events: auto; }
  #menuBtn { display: grid; }
  .suggestions { grid-template-columns: 1fr; }
  .welcome { padding-top: 4vh; }
  .thread { padding-left: 12px; padding-right: 12px; }
  .composer-wrap { padding-left: 12px; padding-right: 12px; }
}