/* ═══════════════════════════════════════
   IIT CHAT — STYLESHEET
   ═══════════════════════════════════════ */

/* ── THEMES ── */
:root {
  --bg: #0d0d14;
  --bg2: #13131f;
  --bg3: #1a1a2e;
  --border: rgba(255,255,255,0.07);
  --accent: #6c63ff;
  --accent3: #43e97b;
  --text: #e8e8f0;
  --text2: #9090b0;
  --text3: #5a5a7a;
  --bubble-me: linear-gradient(135deg, #6c63ff, #a855f7);
  --bubble-them: #1e1e35;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --online: #43e97b;
  --offline: #5a5a7a;
  --red: #ff4f6b;
  --tr: 0.25s cubic-bezier(0.4,0,0.2,1);
}

[data-theme="light"] {
  --bg: #f0f0fa;
  --bg2: #e8e8f5;
  --bg3: #dcdcf0;
  --border: rgba(0,0,0,0.08);
  --text: #1a1a2e;
  --text2: #5a5a80;
  --text3: #9090b0;
  --bubble-them: #e0e0f0;
  --shadow: 0 8px 32px rgba(108,99,255,0.12);
}

[data-theme="romantic"] {
  --bg: #1a0a14;
  --bg2: #220d18;
  --bg3: #2e1020;
  --border: rgba(255,100,130,0.12);
  --accent: #ff6584;
  --accent3: #ffb347;
  --text: #ffe8ee;
  --text2: #e8a0b0;
  --text3: #9a5060;
  --bubble-me: linear-gradient(135deg, #ff6584, #ff8fa3);
  --bubble-them: #2e1020;
  --online: #ffb347;
}

[data-theme="neon"] {
  --bg: #050510;
  --bg2: #0a0a1a;
  --bg3: #0f0f25;
  --border: rgba(0,255,200,0.1);
  --accent: #00ffc8;
  --accent3: #00ffc8;
  --text: #e0fff8;
  --text2: #80c8b8;
  --text3: #406858;
  --bubble-me: linear-gradient(135deg, #00ffc8, #0088ff);
  --bubble-them: #0a1a15;
  --online: #00ffc8;
}

/* ── RESET & BASE ── */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Sora', sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
}
.hidden { display: none !important; }

/* ── AUTH ── */
#auth-screen {
  position: fixed; inset: 0; z-index: 100;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
}
.ag {
  position: absolute;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(108,99,255,0.18) 0%, transparent 70%);
  top: -80px; left: -80px; border-radius: 50%;
  animation: gp 6s ease-in-out infinite; pointer-events: none;
}
.ag2 {
  position: absolute;
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(255,101,132,0.1) 0%, transparent 70%);
  bottom: -40px; right: -40px; border-radius: 50%;
  animation: gp 8s ease-in-out infinite reverse; pointer-events: none;
}
@keyframes gp { 0%,100%{transform:scale(1)} 50%{transform:scale(1.2)} }

.acard {
  position: relative; z-index: 1;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 28px; padding: 44px 40px;
  width: 100%; max-width: 420px;
  box-shadow: var(--shadow);
  animation: sU 0.45s ease;
}
@keyframes sU { from{opacity:0;transform:translateY(28px)} to{opacity:1;transform:translateY(0)} }

.alogo { display: flex; align-items: center; gap: 12px; justify-content: center; margin-bottom: 32px; }
.ali {
  width: 50px; height: 50px;
  background: var(--bubble-me);
  border-radius: 15px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
}
.alt { font-size: 26px; font-weight: 700; letter-spacing: -0.5px; }
.alt span { color: var(--accent); }

.atabs {
  display: flex; gap: 4px;
  background: var(--bg3); border-radius: 12px; padding: 4px;
  margin-bottom: 24px;
}
.atab {
  flex: 1; padding: 10px; border: none; border-radius: 9px;
  background: transparent; color: var(--text2);
  font-family: 'Sora', sans-serif; font-size: 14px; font-weight: 500;
  cursor: pointer; transition: var(--tr);
}
.atab.active { background: var(--accent); color: #fff; }

.fg { margin-bottom: 16px; }
.fg label {
  display: block; font-size: 11px; font-weight: 600;
  color: var(--text2); margin-bottom: 7px;
  letter-spacing: 0.5px; text-transform: uppercase;
}
.fg input {
  width: 100%; padding: 13px 16px;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 11px; color: var(--text);
  font-family: 'Sora', sans-serif; font-size: 14px;
  transition: var(--tr); outline: none;
}
.fg input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.13);
}
.fg input::placeholder { color: var(--text3); }

.avp { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 6px; }
.avo {
  width: 42px; height: 42px; border-radius: 50%; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; border: 3px solid transparent; transition: var(--tr);
}
.avo.sel { border-color: var(--accent); transform: scale(1.15); }

.btnp {
  width: 100%; padding: 14px;
  background: var(--bubble-me); border: none;
  border-radius: 11px; color: #fff;
  font-family: 'Sora', sans-serif; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: var(--tr); margin-top: 6px;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.btnp:hover { opacity: 0.88; transform: translateY(-1px); }

.aerr { color: var(--red); font-size: 12px; margin-top: 8px; text-align: center; min-height: 16px; }

/* ── APP SHELL ── */
#app { display: none; height: 100vh; flex-direction: column; }
.shell { display: flex; height: 100vh; }

/* ── SIDEBAR ── */
.sidebar {
  width: 310px; min-width: 310px;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
}
.sbh {
  padding: 18px 18px 14px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}
.myav {
  width: 38px; height: 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; cursor: pointer; position: relative;
  background: var(--bg3); border: 2px solid var(--accent);
}
.myav .sd {
  position: absolute; bottom: 0; right: 0;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--online); border: 2px solid var(--bg2);
}
.sbt { font-size: 18px; font-weight: 700; flex: 1; }
.sbac { display: flex; gap: 6px; }

.ib {
  width: 34px; height: 34px; border-radius: 9px; border: none;
  background: var(--bg3); color: var(--text2);
  cursor: pointer; transition: var(--tr);
  display: flex; align-items: center; justify-content: center; font-size: 14px;
}
.ib:hover { background: var(--accent); color: #fff; }

.srch { padding: 12px 14px; border-bottom: 1px solid var(--border); }
.sw { position: relative; }
.sw i {
  position: absolute; left: 11px; top: 50%;
  transform: translateY(-50%); color: var(--text3); font-size: 12px;
}
.sin {
  width: 100%; padding: 9px 12px 9px 34px;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 11px; color: var(--text);
  font-family: 'Sora', sans-serif; font-size: 13px;
  outline: none; transition: var(--tr);
}
.sin:focus { border-color: var(--accent); }

.cl { flex: 1; overflow-y: auto; padding: 6px; }
.cl::-webkit-scrollbar { width: 3px; }
.cl::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.noct { text-align: center; padding: 36px 16px; color: var(--text2); }
.noct i { font-size: 36px; margin-bottom: 10px; color: var(--text3); display: block; }
.noct p { font-size: 13px; }

.ci {
  display: flex; align-items: center; gap: 10px;
  padding: 10px; border-radius: 13px; cursor: pointer; transition: var(--tr);
}
.ci:hover, .ci.act { background: var(--bg3); }
.ci.act { background: rgba(108,99,255,0.1); }

.ciav {
  width: 46px; height: 46px; min-width: 46px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; background: var(--bg3); position: relative;
}
.ciav .sd {
  position: absolute; bottom: 1px; right: 1px;
  width: 11px; height: 11px; border-radius: 50%;
  border: 2px solid var(--bg2);
}
.sd.on { background: var(--online); }
.sd.off { background: var(--offline); }

.cii { flex: 1; min-width: 0; }
.cin { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cip { font-size: 11px; color: var(--text2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.cim { display: flex; flex-direction: column; align-items: flex-end; gap: 3px; }
.cit { font-size: 10px; color: var(--text3); }

/* ── MODALS ── */
.ovl {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.55); backdrop-filter: blur(5px);
  display: none; align-items: center; justify-content: center;
}
.ovl.show { display: flex; }

.modal {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 22px; padding: 28px;
  width: 100%; max-width: 380px;
  box-shadow: var(--shadow); animation: sU 0.3s ease;
}
.modal h3 { font-size: 18px; font-weight: 700; margin-bottom: 18px; }
.mact { display: flex; gap: 8px; margin-top: 16px; }
.btns {
  flex: 1; padding: 11px; border: 1px solid var(--border);
  border-radius: 9px; background: transparent; color: var(--text2);
  font-family: 'Sora', sans-serif; font-size: 13px; font-weight: 500;
  cursor: pointer; transition: var(--tr);
}
.btns:hover { background: var(--bg3); }

/* ── SETTINGS ── */
.spp {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.55); backdrop-filter: blur(5px);
  display: none; align-items: flex-start; justify-content: flex-start;
}
.spp.show { display: flex; }

.spc {
  background: var(--bg2); border-right: 1px solid var(--border);
  width: 280px; height: 100%; padding: 22px;
  animation: slR 0.3s ease; overflow-y: auto;
}
@keyframes slR { from{transform:translateX(-100%)} to{transform:translateX(0)} }
.spc h3 { font-size: 17px; font-weight: 700; margin-bottom: 22px; }

.thg { display: grid; grid-template-columns: repeat(2,1fr); gap: 8px; margin-top: 8px; }
.thb {
  padding: 10px 6px; border-radius: 10px; cursor: pointer;
  border: 2px solid transparent; text-align: center;
  font-size: 12px; font-weight: 600; transition: var(--tr);
}
.thb.dark { background: #0d0d14; color: #e8e8f0; }
.thb.light { background: #f0f0fa; color: #1a1a2e; }
.thb.romantic { background: #1a0a14; color: #ffe8ee; }
.thb.neon { background: #050510; color: #00ffc8; }
.thb.sel { border-color: var(--accent); }

/* ── CHAT AREA ── */
.ca { flex: 1; display: flex; flex-direction: column; background: var(--bg); overflow: hidden; }

.cw {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; color: var(--text2);
}
.cwi { font-size: 56px; margin-bottom: 14px; opacity: 0.25; }
.cw h2 { font-size: 20px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.cw p { font-size: 13px; }
.expb {
  display: inline-flex; align-items: center; gap: 4px;
  background: rgba(108,99,255,0.1);
  border: 1px solid rgba(108,99,255,0.2);
  border-radius: 6px; padding: 3px 9px;
  font-size: 11px; color: var(--text2); margin-top: 14px;
}

.chd {
  padding: 14px 22px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px; background: var(--bg2);
}
.chav {
  width: 42px; height: 42px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; background: var(--bg3);
}
.chi { flex: 1; }
.chn { font-size: 15px; font-weight: 700; }
.chs { font-size: 11px; color: var(--text2); }
.chs.on { color: var(--online); }

/* ── MESSAGES ── */
.ma { flex: 1; overflow-y: auto; padding: 18px 20px; display: flex; flex-direction: column; gap: 4px; }
.ma::-webkit-scrollbar { width: 3px; }
.ma::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.dl {
  text-align: center; font-size: 10px; color: var(--text3);
  font-weight: 600; letter-spacing: 0.5px;
  margin: 10px 0 4px;
  display: flex; align-items: center; gap: 8px;
}
.dl::before, .dl::after { content: ''; flex: 1; height: 1px; background: var(--border); }

.mr { display: flex; gap: 8px; margin-bottom: 1px; animation: mI 0.22s ease; }
@keyframes mI { from{opacity:0;transform:translateY(8px)} to{opacity:1;transform:translateY(0)} }
.mr.me { flex-direction: row-reverse; }

.mav {
  width: 30px; height: 30px; border-radius: 50%;
  font-size: 15px; display: flex; align-items: center; justify-content: center;
  background: var(--bg3); align-self: flex-end; flex-shrink: 0;
}
.mr.me .mav { display: none; }

.mc { max-width: 70%; display: flex; flex-direction: column; gap: 2px; }
.mr.me .mc { align-items: flex-end; }

.msn { font-size: 10px; color: var(--text3); font-weight: 500; margin-bottom: 2px; }

.bw { position: relative; }
.bub {
  padding: 9px 14px; border-radius: 16px;
  font-size: 13px; line-height: 1.55;
  cursor: pointer; max-width: 100%; word-break: break-word;
  transition: filter 0.15s;
}
.bub:hover { filter: brightness(1.08); }
.mr.me .bub {
  background: var(--bubble-me); color: #fff;
  border-bottom-right-radius: 4px;
}
.mr.them .bub {
  background: var(--bubble-them); color: var(--text);
  border-bottom-left-radius: 4px; border: 1px solid var(--border);
}
.mr.me.con .bub { border-top-right-radius: 5px; }
.mr.them.con .bub { border-top-left-radius: 5px; }

.mm {
  display: flex; align-items: center; gap: 4px;
  font-size: 10px; color: var(--text3); margin-top: 1px;
}
.mr.me .mm { flex-direction: row-reverse; }
.mck { color: var(--accent3); }

/* Reactions */
.rcts { display: flex; gap: 3px; flex-wrap: wrap; margin-top: 2px; }
.rch {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 20px; padding: 2px 7px; font-size: 11px;
  cursor: pointer; transition: var(--tr);
  display: flex; align-items: center; gap: 3px;
}
.rch:hover { border-color: var(--accent); }
.rch.mine { border-color: var(--accent); background: rgba(108,99,255,0.1); }

.rpk {
  position: absolute; z-index: 50;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 14px; padding: 9px 12px;
  display: flex; gap: 7px; font-size: 20px;
  box-shadow: var(--shadow);
  bottom: calc(100% + 6px); left: 0;
  animation: pI 0.18s ease;
}
.mr.me .rpk { left: auto; right: 0; }
@keyframes pI { from{opacity:0;transform:scale(0.88)} to{opacity:1;transform:scale(1)} }
.rpk span { cursor: pointer; transition: transform 0.12s; }
.rpk span:hover { transform: scale(1.3); }

/* ── INPUT AREA ── */
.ia { padding: 14px 18px; border-top: 1px solid var(--border); background: var(--bg2); }
.ir { display: flex; align-items: flex-end; gap: 8px; position: relative; }

.iw {
  flex: 1; background: var(--bg3); border: 1px solid var(--border);
  border-radius: 15px; display: flex; align-items: flex-end;
  padding: 8px 10px; gap: 7px; transition: var(--tr); max-height: 110px;
}
.iw:focus-within { border-color: var(--accent); }

#msgi {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--text); font-family: 'Sora', sans-serif;
  font-size: 13px; resize: none;
  max-height: 85px; min-height: 22px; line-height: 1.5;
}
#msgi::placeholder { color: var(--text3); }

.eb {
  background: none; border: none; color: var(--text2);
  cursor: pointer; font-size: 17px; transition: var(--tr); padding: 0 1px;
}
.eb:hover { color: var(--accent); transform: scale(1.2); }

.snd {
  width: 44px; height: 44px; border-radius: 13px; border: none;
  background: var(--bubble-me); color: #fff; cursor: pointer;
  font-size: 15px; display: flex; align-items: center; justify-content: center;
  transition: var(--tr); flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(108,99,255,0.35);
}
.snd:hover { transform: scale(1.08); }

/* ── EMOJI PICKER ── */
.epnl {
  position: absolute; bottom: calc(100% + 10px); left: 0;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 16px; padding: 14px;
  box-shadow: var(--shadow); z-index: 50; width: 300px;
  animation: pI 0.2s ease;
}
.ecats { display: flex; gap: 5px; margin-bottom: 10px; flex-wrap: wrap; }
.ecb {
  padding: 4px 9px; border-radius: 7px; border: none;
  background: var(--bg3); color: var(--text2);
  font-size: 11px; cursor: pointer; transition: var(--tr);
}
.ecb.act { background: var(--accent); color: #fff; }
.egr {
  display: grid; grid-template-columns: repeat(8,1fr);
  gap: 3px; max-height: 180px; overflow-y: auto;
}
.eo {
  font-size: 20px; cursor: pointer; text-align: center;
  padding: 3px; border-radius: 5px; transition: transform 0.1s;
}
.eo:hover { background: var(--bg3); transform: scale(1.2); }

/* ── TOAST ── */
.toast {
  position: fixed; bottom: 28px; left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 11px; padding: 10px 18px;
  font-size: 13px; z-index: 400;
  transition: transform 0.28s ease; box-shadow: var(--shadow);
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .sidebar {
    position: fixed; inset: 0; z-index: 50;
    width: 100%; transform: translateX(0); transition: var(--tr);
  }
  .sidebar.hidden-mob { transform: translateX(-100%); }
  .ca { position: absolute; inset: 0; }
}