/* NessChat — original NessTech theming system.
   Five original colour themes, each with a Light and a Dark variant,
   driven entirely by CSS variables. The active theme is set with
   <html data-theme="..."> and dark mode with <html class="dark"> by the
   boot script in index.html (before first paint) and by app.js after.
   Variable meanings: --navy/--navy2 = primary / primary-2 (headers,
   own bubbles), --gold/--gold2 = accent / accent-2 (buttons, ticks,
   highlights), --ivory = chat background, --accent-deep = accent as
   readable text on light surfaces, --accent-soft = tinted highlight
   background, --accent-ink = text drawn on the accent colour. */

/* ---- Default theme: NessTech Navy & Gold ---- */
:root{
  --navy:#0B1F3A; --navy2:#102A4C; --gold:#F0A832; --gold2:#F5B942;
  --ivory:#F7F4EE; --ink:#14243c; --muted:#6b7686; --line:#e3ddd0;
  --bubble-other:#ffffff; --panel:#ffffff; --app-bg:#ece7db;
  --accent-deep:#B97E14; --accent-soft:#FDF3DD; --accent-ink:#231600;
  --deep:#0A1830; --dot:rgba(11,31,58,.055);
  --shadow:0 10px 30px rgba(11,31,58,.14);
}
html.dark{
  --ivory:#081426; --ink:#e8edf5; --muted:#93a1b5; --line:#1d3355;
  --bubble-other:#12263f; --panel:#0d1f38; --app-bg:#050d1a;
  --accent-deep:#F5B942; --accent-soft:#2A2110; --deep:#050D1A;
  --dot:rgba(255,255,255,.05);
  --shadow:0 10px 30px rgba(0,0,0,.45);
}

/* ---- Theme: Midnight (black / deep blue) ---- */
html[data-theme="midnight"]{
  --navy:#131E33; --navy2:#1B2A47; --gold:#5B8DEF; --gold2:#84A9F5;
  --ivory:#EDF1F7; --ink:#131B2A; --muted:#5F6E86; --line:#D5DCE8;
  --accent-deep:#2F5FC0; --accent-soft:#E1EBFC; --deep:#0B1220;
}
html.dark[data-theme="midnight"]{
  --navy:#0A0F1E; --navy2:#111A30; --gold:#6EA8FF; --gold2:#9CC2FF;
  --ivory:#04060C; --ink:#E6EDF9; --muted:#8A99B5; --line:#1C2942;
  --bubble-other:#0D1526; --panel:#090F1D; --app-bg:#02040A;
  --accent-deep:#9CC2FF; --accent-soft:#12233F; --accent-ink:#081120; --deep:#02040A;
}

/* ---- Theme: Emerald (deep teal-green, original values) ---- */
html[data-theme="emerald"]{
  --navy:#063A34; --navy2:#0A4A42; --gold:#C9962E; --gold2:#E0B04A;
  --ivory:#EFF5EF; --ink:#12291F; --muted:#5E7268; --line:#D3DFD2;
  --accent-deep:#9A7214; --accent-soft:#F7EDD3; --deep:#04231F;
}
html.dark[data-theme="emerald"]{
  --navy:#04231F; --navy2:#063A34; --gold:#D9A93F; --gold2:#EBC266;
  --ivory:#031714; --ink:#E4F0E9; --muted:#8AA79B; --line:#123B33;
  --bubble-other:#072A24; --panel:#052019; --app-bg:#02100D;
  --accent-deep:#EBC266; --accent-soft:#2E2410; --deep:#02100D;
}

/* ---- Theme: Royal Purple ---- */
html[data-theme="purple"]{
  --navy:#2E1065; --navy2:#3E1A86; --gold:#B794F6; --gold2:#CDB2FF;
  --ivory:#F3EFFB; --ink:#241640; --muted:#6E6288; --line:#DED4F2;
  --accent-deep:#6D3BD1; --accent-soft:#EBE1FC; --accent-ink:#22103F; --deep:#1D0A45;
}
html.dark[data-theme="purple"]{
  --navy:#1D0A45; --navy2:#2E1065; --gold:#C4A5FF; --gold2:#D8C2FF;
  --ivory:#0E0620; --ink:#EFE9FC; --muted:#A294C4; --line:#2C1A55;
  --bubble-other:#1B0F3A; --panel:#150833; --app-bg:#08031A;
  --accent-deep:#D8C2FF; --accent-soft:#2A1650; --accent-ink:#22103F; --deep:#08031A;
}

/* ---- Theme: Sunset Coral ---- */
html[data-theme="coral"]{
  --navy:#7E2A12; --navy2:#9C3A1D; --gold:#FF8A5C; --gold2:#FFA982;
  --ivory:#FBF1EA; --ink:#332016; --muted:#84685C; --line:#F0DCD2;
  --accent-deep:#C2501F; --accent-soft:#FDE7DC; --deep:#571C0B;
}
html.dark[data-theme="coral"]{
  --navy:#571C0B; --navy2:#7E2A12; --gold:#FF9A70; --gold2:#FFB894;
  --ivory:#1D0D07; --ink:#FBEDE6; --muted:#C09A8A; --line:#47220F;
  --bubble-other:#2C140A; --panel:#220E07; --app-bg:#120704;
  --accent-deep:#FFB894; --accent-soft:#3D1E0D; --accent-ink:#331303; --deep:#120704;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; color:var(--ink); background:var(--app-bg);
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
}
.hidden{display:none !important}
button{font-family:inherit; cursor:pointer}
input{font-family:inherit}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:rgba(120,130,150,.35);border-radius:8px}

/* ---------- Logo ---------- */
.logo{width:64px;height:64px;border-radius:16px;overflow:hidden;flex:none}
.logo svg{width:100%;height:100%;display:block}
.logo.sm{width:38px;height:38px;border-radius:10px}
.logo.lg{width:84px;height:84px;border-radius:20px;margin:0 auto}

/* ---------- Auth ---------- */
.auth-wrap{min-height:100%;display:flex;align-items:center;justify-content:center;padding:20px;background:linear-gradient(160deg,var(--navy) 0%,var(--navy2) 55%,var(--deep) 100%)}
.auth-card{background:var(--panel);width:100%;max-width:420px;border-radius:22px;padding:28px 26px 20px;box-shadow:var(--shadow)}
.brand{text-align:center;margin-bottom:18px}
.brand .logo{margin:0 auto 10px}
.brand h1{margin:0;font-size:30px;color:var(--navy);letter-spacing:-.5px}
html.dark .brand h1{color:#fff}
.tagline{margin:4px 0 0;color:var(--gold);font-weight:600;font-size:14px}
.pill-tabs{display:flex;background:#eef0f3;border-radius:999px;padding:4px;margin-bottom:18px}
html.dark .pill-tabs{background:#12263f}
.pill{flex:1;border:0;background:transparent;padding:9px;border-radius:999px;font-weight:600;color:var(--muted)}
.pill.active{background:var(--navy);color:#fff}
.auth-form{display:flex;flex-direction:column;gap:13px}
.auth-form label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600}
.auth-form label small{font-weight:400;color:var(--muted)}
.auth-form input{padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;font-size:15px;background:var(--panel);color:var(--ink);outline:none}
.auth-form input:focus{border-color:var(--gold)}
.btn-gold{background:linear-gradient(180deg,var(--gold2),var(--gold));color:var(--accent-ink);border:0;padding:13px;border-radius:12px;font-size:16px;font-weight:700}
.btn-gold:hover{filter:brightness(1.05)}
.link-btn{background:none;border:0;color:var(--navy2);font-weight:600;font-size:14px}
html.dark .link-btn{color:var(--gold2)}
.auth-msg{min-height:18px;margin:0;font-size:14px;color:#b3261e;text-align:center}
.auth-msg.ok{color:#1c7a35}
.form-note{font-size:13px;color:var(--muted);margin:0}
.auth-foot{text-align:center;color:var(--muted);font-size:12px;margin:16px 0 2px}

/* ---------- App layout ---------- */
.app{display:flex;height:100dvh;max-width:1440px;margin:0 auto;background:var(--panel);box-shadow:var(--shadow)}
.sidebar{width:360px;max-width:100%;border-right:1px solid var(--line);display:flex;flex-direction:column;background:var(--panel);flex:none}
.side-head{background:var(--navy);color:#fff;padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:8px}
.brand-mini{display:flex;align-items:center;gap:10px;min-width:0}
.brand-mini strong{display:block;font-size:17px;line-height:1.1}
.me-line{display:block;font-size:12px;color:#c8d3e4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px}
.head-actions{display:flex;gap:4px;align-items:center}
.icon-btn{background:none;border:0;color:inherit;width:38px;height:38px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;flex:none}
.icon-btn:hover{background:rgba(127,140,165,.16)}
.icon-btn svg{width:21px;height:21px}
.icon-btn.sm{width:30px;height:30px}.icon-btn.sm svg{width:16px;height:16px}
.icon-btn.recording{background:#b3261e;color:#fff}
.search-row{margin:12px 14px 6px;display:flex;align-items:center;gap:8px;background:var(--ivory);border:1px solid var(--line);border-radius:999px;padding:0 14px}
.search-ic{width:18px;height:18px;color:var(--muted);flex:none}
.search-row input{border:0;background:transparent;outline:none;padding:10px 0;width:100%;font-size:14px;color:var(--ink)}
.quick-nav{display:flex;gap:6px;flex-wrap:wrap;padding:8px 14px 10px;border-bottom:1px solid var(--line)}
.qbtn{border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:999px;padding:6px 12px;font-size:13px;font-weight:600}
.qbtn:hover{border-color:var(--gold);color:var(--navy)}
html.dark .qbtn:hover{color:var(--gold2)}
.chat-list{overflow-y:auto;flex:1}
.chat-item{display:flex;gap:12px;padding:12px 14px;cursor:pointer;border-bottom:1px solid rgba(127,140,165,.08);align-items:center}
.chat-item:hover{background:var(--ivory)}
.chat-item.active{background:var(--accent-soft)}

.avatar{width:48px;height:48px;border-radius:50%;background:var(--navy2);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;flex:none}
.avatar.gold{background:var(--gold);color:var(--accent-ink)}
.chat-meta{flex:1;min-width:0}
.chat-top{display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.chat-name{font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-time{font-size:12px;color:var(--muted);flex:none}
.chat-time.unread{color:var(--accent-deep);font-weight:700}
.chat-last{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:2px}
.dot{width:10px;height:10px;border-radius:50%;background:var(--gold);border:2px solid var(--panel);position:relative;margin-left:-16px;margin-top:34px;flex:none}
.badge{background:var(--gold);color:var(--accent-ink);font-size:11px;font-weight:800;min-width:20px;height:20px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;padding:0 6px;flex:none}
.empty-note{padding:26px 18px;color:var(--muted);font-size:14px;text-align:center;line-height:1.5}

/* ---------- Main pane ---------- */
.main-pane{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--ivory)}
/* Chat wallpapers — applied to the conversation pane only (.conv),
   chosen in Settings → Appearance and stored per user. */
.conv{background:var(--ivory)}
html[data-wallpaper="dots"] .conv{background-color:var(--ivory);
  background-image:radial-gradient(var(--dot) 1px, transparent 1.4px);background-size:22px 22px}
html[data-wallpaper="navy"] .conv{background-color:var(--navy);
  background-image:radial-gradient(rgba(255,255,255,.09) 1.2px, transparent 1.6px),
  repeating-linear-gradient(45deg, rgba(255,255,255,.028) 0 14px, transparent 14px 28px);
  background-size:26px 26px, auto}
html[data-wallpaper="dark"] .conv{background-color:#0C1322;background-image:none}
html[data-wallpaper="plain"] .conv{background-color:var(--ivory);background-image:none}
.welcome{margin:auto;text-align:center;padding:24px;max-width:440px}
.welcome h2{color:var(--ink);margin:14px 0 8px}
.welcome p{color:var(--muted);line-height:1.6;margin:0}
.conv{display:flex;flex-direction:column;height:100%}
.conv-head{background:var(--navy);color:#fff;padding:9px 12px;display:flex;align-items:center;gap:10px;flex:none}
.conv-head .avatar{width:40px;height:40px;font-size:15px;background:var(--gold);color:var(--accent-ink)}
.conv-title{flex:1;min-width:0}
.conv-title strong{display:block;font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.conv-sub{font-size:12px;color:#c8d3e4}
.back-btn{display:none}
.msg-list{flex:1;overflow-y:auto;padding:18px 16px 8px;display:flex;flex-direction:column;gap:4px}
.day-sep{align-self:center;background:rgba(11,31,58,.08);color:var(--muted);font-size:12px;padding:4px 12px;border-radius:999px;margin:10px 0}
html.dark .day-sep{background:rgba(255,255,255,.09)}
.msg-row{display:flex;margin-top:6px}
.msg-row.mine{justify-content:flex-end}
.bubble{max-width:72%;padding:9px 12px 6px;border-radius:18px;font-size:15px;line-height:1.45;position:relative;word-wrap:break-word;box-shadow:0 1px 2px rgba(11,31,58,.08)}
.msg-row.mine .bubble{background:var(--navy);color:#fff;border-bottom-right-radius:4px}
.msg-row.theirs .bubble{background:var(--bubble-other);color:var(--ink);border:1px solid var(--line);border-bottom-left-radius:4px}
.bubble .sender-name{font-size:12px;font-weight:700;color:var(--accent-deep);margin-bottom:3px}
.bubble img.photo{max-width:260px;width:100%;border-radius:12px;display:block}
.bubble audio{max-width:240px;height:36px}
.reply-quote{border-left:3px solid var(--gold);background:rgba(127,140,165,.14);border-radius:6px;padding:5px 8px;font-size:13px;margin-bottom:6px}
.reply-quote strong{display:block;font-size:12px}
.msg-foot{display:flex;justify-content:flex-end;align-items:center;gap:5px;font-size:11px;margin-top:3px;opacity:.75}
.ticks{font-weight:700;letter-spacing:-2px}
.ticks.seen{color:var(--gold2)}
.reactions{display:flex;gap:4px;margin-top:4px;flex-wrap:wrap}
.reaction-chip{background:var(--panel);border:1px solid var(--line);border-radius:999px;font-size:12px;padding:1px 7px}
.deleted-text{font-style:italic;opacity:.7}
.edited-tag{font-size:10px;opacity:.7}
.msg-actions{display:none;gap:2px;align-self:flex-start;margin:0 4px}
.msg-row:hover .msg-actions{display:flex}
.mini-btn{background:var(--panel);border:1px solid var(--line);border-radius:999px;font-size:11px;padding:3px 9px;color:var(--ink)}
.mini-btn:hover{border-color:var(--gold)}
.emoji-bar{display:flex;gap:4px;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:3px 6px;box-shadow:var(--shadow)}
.emoji-bar button{background:none;border:0;font-size:17px;padding:2px}
.reply-bar{display:flex;align-items:center;gap:8px;background:var(--panel);border-top:1px solid var(--line);padding:8px 12px}
.reply-info{flex:1;border-left:3px solid var(--gold);padding-left:9px;font-size:13px;min-width:0}
.reply-info strong{display:block;font-size:12px;color:var(--accent-deep)}
.reply-info span{color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block}
.composer{display:flex;align-items:center;gap:6px;padding:10px 12px;background:transparent}
.composer #msgInput{flex:1;border:1px solid var(--line);background:var(--panel);color:var(--ink);border-radius:999px;padding:12px 16px;font-size:15px;outline:none;min-width:0}
.composer #msgInput:focus{border-color:var(--gold)}
.composer .icon-btn{background:var(--panel);border:1px solid var(--line);color:var(--navy2)}
html.dark .composer .icon-btn{color:var(--gold2)}
.send-btn{background:linear-gradient(180deg,var(--gold2),var(--gold));border:0;color:var(--accent-ink);width:44px;height:44px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;flex:none}
.send-btn svg{width:20px;height:20px}
.voice-hint{margin:0 14px 10px;font-size:13px;color:#b3261e}

/* ---------- Panels ---------- */
.panel{display:flex;flex-direction:column;height:100%;background:var(--panel)}
.panel-body{overflow-y:auto;padding:20px;max-width:640px;width:100%;margin:0 auto}
.panel-body h3{margin:22px 0 10px;color:var(--ink)}
.panel-body h3:first-child{margin-top:0}
.panel-card{border:1px solid var(--line);border-radius:14px;padding:16px;margin-bottom:14px;background:var(--panel)}
.panel-card label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600;margin-bottom:12px}
.panel-card input[type=text],.panel-card input[type=email],.panel-card select{padding:11px 13px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;background:var(--panel);color:var(--ink)}
.btn-navy{background:var(--navy);color:#fff;border:0;padding:11px 18px;border-radius:10px;font-weight:700}
.btn-ghost{background:none;border:1px solid var(--line);color:var(--ink);padding:10px 16px;border-radius:10px;font-weight:600}
.btn-danger{background:#b3261e;color:#fff;border:0;padding:9px 14px;border-radius:9px;font-weight:600;font-size:13px}
.switch-row{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}
.switch-row:last-child{border-bottom:0}
.user-row{display:flex;align-items:center;gap:12px;padding:11px 6px;border-bottom:1px solid var(--line)}
.user-row:last-child{border-bottom:0}
.user-row .avatar{width:42px;height:42px;font-size:15px}
.user-row .grow{flex:1;min-width:0}
.user-row .grow strong{display:block}
.user-row .grow span{font-size:13px;color:var(--muted)}
.status-item{display:flex;align-items:center;gap:12px;padding:11px 6px;border-bottom:1px solid var(--line);cursor:pointer}
.status-ring{border:2.5px solid var(--gold);border-radius:50%;padding:2px}
.status-text{font-size:15px;line-height:1.5;white-space:pre-wrap}
.check-row{display:flex;align-items:center;gap:10px;padding:8px 0;font-size:15px}
.check-row input{width:18px;height:18px;accent-color:var(--navy)}
.small{font-size:13px;color:var(--muted);line-height:1.55}
.notice{font-size:14px;padding:11px 13px;border-radius:10px;background:var(--accent-soft);color:var(--accent-deep);margin-bottom:12px}


/* ---------- Sidebar footer + update banner ---------- */
.side-foot{padding:9px 14px;border-top:1px solid var(--line);font-size:12px;color:var(--muted);flex:none}
.update-banner{position:fixed;top:0;left:0;right:0;z-index:60;background:var(--navy);color:#fff;
  display:flex;align-items:center;justify-content:center;gap:12px;padding:10px 14px;font-size:14px;
  box-shadow:0 4px 18px rgba(0,0,0,.25);flex-wrap:wrap;text-align:center}
.update-banner button{background:var(--gold);color:var(--accent-ink);border:0;border-radius:999px;
  padding:7px 16px;font-weight:700;font-size:13px}
.update-banner button.ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5);font-weight:600}

/* ---------- Appearance: theme + wallpaper pickers ---------- */
.theme-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-bottom:6px}
.theme-card{border:2px solid var(--line);border-radius:12px;padding:11px 12px;background:var(--panel);
  text-align:left;color:var(--ink);display:flex;flex-direction:column;gap:8px}
.theme-card:hover{border-color:var(--gold)}
.theme-card.active{border-color:var(--gold);background:var(--accent-soft)}
.theme-card strong{font-size:14px}
.theme-card .mode-tag{font-size:11px;color:var(--muted);font-weight:600}
.swatches{display:flex;gap:5px}
.swatch{width:22px;height:22px;border-radius:50%;border:1px solid rgba(0,0,0,.14);flex:none}
.wp-row{display:flex;gap:8px;flex-wrap:wrap}
.wp-chip{border:2px solid var(--line);background:var(--panel);color:var(--ink);border-radius:999px;
  padding:8px 14px;font-size:13px;font-weight:600}
.wp-chip:hover{border-color:var(--gold)}
.wp-chip.active{border-color:var(--gold);background:var(--accent-soft)}

/* ---------- Software Update section ---------- */
.version-row{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:14px;padding:4px 0}
.update-result{font-size:14px;line-height:1.55;margin-top:10px}
.update-result:empty{display:none}
.changelog{font-size:14px;line-height:1.55}
.changelog h4{margin:12px 0 6px;font-size:15px}
.changelog ul{margin:0 0 6px;padding-left:20px}
.changelog li{margin-bottom:4px}
.tag-new{background:var(--gold);color:var(--accent-ink);font-size:11px;font-weight:800;border-radius:999px;padding:2px 8px;margin-left:8px;vertical-align:1px}

/* ---------- Responsive ---------- */
@media (max-width:820px){
  .sidebar{width:100%}
  .main-pane{display:none}
  .app.in-chat .sidebar{display:none}
  .app.in-chat .main-pane{display:flex}
  .back-btn{display:inline-flex}
  .bubble{max-width:84%}
}