/* ChatX premium themes — Material You inspired palettes + Google Fonts */
:root,
[data-theme="emerald"]{
  --bg:#070b0e; --bg2:#0d1519; --panel:#152026; --panel2:#1c2a32;
  --green:#2AFF8A; --green2:#12C96A; --green3:#0A7A48;
  --green-soft:rgba(42,255,138,.12);
  --text:#F3F7F5; --muted:#8FA3AE; --line:rgba(255,255,255,.07);
  --on-accent:#042216;
  --accent-hi:#3CFF9A; --accent-mid:#12C96A; --accent-lo:#0B9B55;
  --glow1:rgba(42,255,138,.10); --glow2:rgba(12,100,80,.14);
  --btn-shadow:rgba(18,201,106,.28);
  --msg-mine-a:#0E8F5A; --msg-mine-b:#12C96A;
  --font:"Manrope",system-ui,sans-serif;
  --display:"Sora",system-ui,sans-serif;
  color-scheme:dark;
}

/* Google Blue — Material Azure */
[data-theme="azure"]{
  --bg:#070A12; --bg2:#0C1220; --panel:#141C2E; --panel2:#1B2640;
  --green:#7AB7FF; --green2:#4285F4; --green3:#1A56C9;
  --green-soft:rgba(66,133,244,.14);
  --text:#F2F5FF; --muted:#8E9BB8; --line:rgba(255,255,255,.08);
  --on-accent:#061228;
  --accent-hi:#8EC5FF; --accent-mid:#4285F4; --accent-lo:#1A56C9;
  --glow1:rgba(66,133,244,.14); --glow2:rgba(26,86,201,.18);
  --btn-shadow:rgba(66,133,244,.32);
  --msg-mine-a:#1A56C9; --msg-mine-b:#4285F4;
  --font:"DM Sans",system-ui,sans-serif;
  --display:"Outfit",system-ui,sans-serif;
}

/* Sunset Coral — warm Material You */
[data-theme="sunset"]{
  --bg:#120A08; --bg2:#1A100C; --panel:#2A1812; --panel2:#352018;
  --green:#FF9B6A; --green2:#FF6B35; --green3:#C43E12;
  --green-soft:rgba(255,107,53,.14);
  --text:#FFF4EE; --muted:#B39A8C; --line:rgba(255,255,255,.08);
  --on-accent:#2A1008;
  --accent-hi:#FFB087; --accent-mid:#FF6B35; --accent-lo:#C43E12;
  --glow1:rgba(255,107,53,.14); --glow2:rgba(196,62,18,.16);
  --btn-shadow:rgba(255,107,53,.3);
  --msg-mine-a:#C43E12; --msg-mine-b:#FF6B35;
  --font:"Nunito Sans",system-ui,sans-serif;
  --display:"Bricolage Grotesque",system-ui,sans-serif;
}

/* Amethyst — Material violet */
[data-theme="amethyst"]{
  --bg:#0C0814; --bg2:#140E1E; --panel:#1E152C; --panel2:#281C38;
  --green:#D0BCFF; --green2:#9A6BFF; --green3:#6B3FD4;
  --green-soft:rgba(154,107,255,.14);
  --text:#F7F2FF; --muted:#A498B8; --line:rgba(255,255,255,.08);
  --on-accent:#1A0C30;
  --accent-hi:#E0CFFF; --accent-mid:#9A6BFF; --accent-lo:#6B3FD4;
  --glow1:rgba(154,107,255,.14); --glow2:rgba(107,63,212,.18);
  --btn-shadow:rgba(154,107,255,.32);
  --msg-mine-a:#6B3FD4; --msg-mine-b:#9A6BFF;
  --font:"Work Sans",system-ui,sans-serif;
  --display:"Syne",system-ui,sans-serif;
}

/* Onyx Gold — luxury */
[data-theme="gold"]{
  --bg:#0C0A06; --bg2:#14110A; --panel:#221C12; --panel2:#2C2416;
  --green:#FFD56A; --green2:#E6B422; --green3:#A87A10;
  --green-soft:rgba(230,180,34,.14);
  --text:#FFF8E8; --muted:#A89A78; --line:rgba(255,255,255,.08);
  --on-accent:#1A1406;
  --accent-hi:#FFE08A; --accent-mid:#E6B422; --accent-lo:#A87A10;
  --glow1:rgba(230,180,34,.12); --glow2:rgba(168,122,16,.14);
  --btn-shadow:rgba(230,180,34,.28);
  --msg-mine-a:#A87A10; --msg-mine-b:#E6B422;
  --font:"Karla",system-ui,sans-serif;
  --display:"Cinzel",serif;
}

/* Ocean Teal */
[data-theme="ocean"]{
  --bg:#050D10; --bg2:#0A161A; --panel:#122226; --panel2:#183034;
  --green:#5EEAD4; --green2:#14B8A6; --green3:#0F766E;
  --green-soft:rgba(20,184,166,.14);
  --text:#ECFEFF; --muted:#7FA8A8; --line:rgba(255,255,255,.08);
  --on-accent:#042F2E;
  --accent-hi:#7FF0DC; --accent-mid:#14B8A6; --accent-lo:#0F766E;
  --glow1:rgba(20,184,166,.12); --glow2:rgba(15,118,110,.16);
  --btn-shadow:rgba(20,184,166,.3);
  --msg-mine-a:#0F766E; --msg-mine-b:#14B8A6;
  --font:"IBM Plex Sans",system-ui,sans-serif;
  --display:"Instrument Sans",system-ui,sans-serif;
}

/* Rose Quartz */
[data-theme="rose"]{
  --bg:#12080C; --bg2:#1A0E14; --panel:#2A1620; --panel2:#351C28;
  --green:#FF8FB5; --green2:#F43F7A; --green3:#BE123C;
  --green-soft:rgba(244,63,122,.14);
  --text:#FFF0F5; --muted:#B892A0; --line:rgba(255,255,255,.08);
  --on-accent:#2A0814;
  --accent-hi:#FFA8C5; --accent-mid:#F43F7A; --accent-lo:#BE123C;
  --glow1:rgba(244,63,122,.14); --glow2:rgba(190,18,60,.16);
  --btn-shadow:rgba(244,63,122,.3);
  --msg-mine-a:#BE123C; --msg-mine-b:#F43F7A;
  --font:"Plus Jakarta Sans",system-ui,sans-serif;
  --display:"Outfit",system-ui,sans-serif;
}

/* Pearl Light — clean light Material */
[data-theme="pearl"]{
  --bg:#F4F7F5; --bg2:#E8EEEA; --panel:#FFFFFF; --panel2:#F0F4F1;
  --green:#0B9B55; --green2:#12C96A; --green3:#087A42;
  --green-soft:rgba(18,201,106,.12);
  --text:#0E1914; --muted:#5A6F66; --line:rgba(0,0,0,.08);
  --on-accent:#FFFFFF;
  --accent-hi:#3CFF9A; --accent-mid:#12C96A; --accent-lo:#0B9B55;
  --glow1:rgba(18,201,106,.1); --glow2:rgba(11,155,85,.08);
  --btn-shadow:rgba(18,201,106,.22);
  --msg-mine-a:#0B9B55; --msg-mine-b:#12C96A;
  --font:"Manrope",system-ui,sans-serif;
  --display:"Sora",system-ui,sans-serif;
  --shadow:0 16px 40px rgba(0,0,0,.08);
  color-scheme:light;
}

[data-theme="pearl"] body,
[data-theme="pearl"] .shell,
[data-theme="pearl"] .sidebar,
[data-theme="pearl"] .main{
  color:var(--text);
}
[data-theme="pearl"] .input{
  background:rgba(0,0,0,.03);
  border-color:rgba(0,0,0,.1);
}
[data-theme="pearl"] .btn-ghost{
  background:rgba(0,0,0,.04);
  border-color:rgba(0,0,0,.1);
}
[data-theme="pearl"] .msg.theirs{
  background:rgba(0,0,0,.05);
  border-color:rgba(0,0,0,.08);
}
[data-theme="pearl"] .tabs{
  background:rgba(0,0,0,.04);
}
[data-theme="pearl"] .lock-screen{
  background:
    radial-gradient(800px 500px at 50% -10%,var(--glow1),transparent 50%),
    #E8EEEA;
}

/* Theme picker UI */
.theme-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:.7rem;
}
.theme-card{
  border:1px solid var(--line);
  border-radius:16px;
  padding:.85rem .8rem;
  background:rgba(255,255,255,.03);
  cursor:pointer;text-align:left;
  transition:transform .15s, border-color .15s, box-shadow .2s;
  color:var(--text);
  font:inherit;
}
.theme-card:hover{transform:translateY(-1px);border-color:rgba(255,255,255,.14)}
.theme-card.active{
  border-color:var(--green2);
  box-shadow:0 0 0 3px var(--green-soft), 0 10px 24px rgba(0,0,0,.25);
}
.theme-swatch{
  display:flex;gap:.28rem;margin-bottom:.55rem;
}
.theme-swatch span{
  width:100%;height:28px;border-radius:8px;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.12);
}
.theme-card b{display:block;font-size:.88rem;font-weight:800;font-family:var(--display)}
.theme-card small{display:block;color:var(--muted);font-size:.72rem;margin-top:.18rem;line-height:1.35}
.theme-note{font-size:.75rem;color:var(--muted);margin:1rem 0 0;line-height:1.45}