/* ================================================================
   Derid Support Chat — Dubai 2026 Black & White Edition
   Elegantní, futuristický a plynulý vzhled s mikrointerakcemi
=================================================================*/

:root {
  --ui-bg:#0a0a0a;
  --ui-surface:#111;
  --ui-surface-strong:#181818;
  --ui-text:#f8f8f8;
  --ui-subtext:rgba(255,255,255,.6);
  --ui-border:rgba(255,255,255,.08);
  --ui-accent:#ffffff;
  --ui-accent-glow:rgba(255,255,255,.15);
  --ui-accent-bg:linear-gradient(135deg,#fff 0%,#dcdcdc 100%);
  --ui-radius:20px;
  --ui-blur:20px;
  --ui-shadow:0 12px 40px rgba(0,0,0,.55);
  --ui-font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}

/* ====== ROOT CONTAINER ====== */
.derid-chat {
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:9999;
  font-family:var(--ui-font);
  color:var(--ui-text);
  perspective:800px;
}

/* ====== BUBBLE ====== */
.derid-bubble {
  width:64px;height:64px;border-radius:50%;
  display:grid;place-items:center;
  background:linear-gradient(145deg,#141414,#1e1e1e);
  border:1px solid var(--ui-border);
  box-shadow:var(--ui-shadow);
  cursor:pointer;
  backdrop-filter:blur(var(--ui-blur));
  transition:all .3s cubic-bezier(.25,.8,.25,1);
}
.derid-bubble:hover {
  transform:translateY(-5px) scale(1.07);
  box-shadow:0 0 25px var(--ui-accent-glow);
}

/* ====== PANEL ====== */
.derid-panel {
  position:fixed;
  right:24px;
  bottom:calc(24px + 64px);
  width:min(92vw,400px);
  height:500px;
  max-height:calc(100vh - 140px);
  background:rgba(17,17,17,.98);
  border:1px solid var(--ui-border);
  border-radius:var(--ui-radius);
  box-shadow:var(--ui-shadow);
  overflow:hidden;
  backdrop-filter:blur(var(--ui-blur));
  display:none;
  flex-direction:column;
  transform-origin:bottom right;
  opacity:0;
  transform:translateY(20px) scale(0.96);
}
.derid-panel.open {
  display:flex;
  animation:panelOpen .45s cubic-bezier(.3,.7,.3,1.1) forwards;
}
@keyframes panelOpen {
  to {opacity:1;transform:translateY(0) scale(1);}
}

/* ====== HEADER ====== */
.derid-head {
  padding:16px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-bottom:1px solid var(--ui-border);
  background:linear-gradient(180deg,rgba(255,255,255,.06),transparent);
}
.derid-title {font-weight:700;font-size:16px;letter-spacing:.3px;}
.derid-sub {color:var(--ui-subtext);font-size:12px;}

/* HEADER BUTTONS */
#userActions button {
  background:#fff;color:#000;border:none;
  border-radius:10px;padding:6px 14px;
  font-weight:600;margin-left:8px;
  cursor:pointer;transition:all .25s ease;
  font-size:13px;
}
#userActions button:hover {
  background:#f2f2f2;
  transform:translateY(-1px);
  box-shadow:0 0 16px rgba(255,255,255,.15);
}

/* ====== BODY ====== */
.derid-body {
  flex:1;overflow-y:auto;padding:16px;
  scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.2) transparent;
}
.derid-body::-webkit-scrollbar{width:6px;}
.derid-body::-webkit-scrollbar-thumb{
  background:rgba(255,255,255,.2);
  border-radius:10px;
}

/* ====== MESSAGES ====== */
.msg {
  padding:10px 14px;
  margin:8px 0;
  border-radius:16px;
  max-width:86%;
  line-height:1.35;
  word-break:break-word;
  animation:msgIn .3s ease both;
}
@keyframes msgIn {
  from{opacity:0;transform:translateY(6px) scale(.96)}
  to{opacity:1;transform:none}
}
.msg.user {
  background:linear-gradient(135deg,#f8f8f8,#dcdcdc);
  color:#000;margin-left:auto;
  border:1px solid rgba(255,255,255,.15);
  box-shadow:inset 0 0 10px rgba(0,0,0,.1);
}
.msg.bot {
  background:#1a1a1a;
  border:1px solid var(--ui-border);
}

/* === AI typing === */
.msg.bot.typing::after {
  content:'•••';
  display:inline-block;
  animation:typingDots 1.4s infinite;
}
@keyframes typingDots {
  0%,20%{content:'•'}
  40%{content:'••'}
  60%,100%{content:'•••'}
}

/* ====== INPUT AREA ====== */
.derid-input {
  display:flex;gap:8px;align-items:center;
  border-top:1px solid var(--ui-border);
  padding:12px;
  background:linear-gradient(180deg,rgba(255,255,255,.03),transparent);
}
.derid-input input {
  flex:1;
  background:rgba(255,255,255,.08);
  border:1px solid var(--ui-border);
  border-radius:12px;
  padding:12px;
  color:var(--ui-text);
  font-size:14px;
  outline:none;
  transition:all .25s ease;
}
.derid-input input:focus {
  border-color:#fff;
  background:rgba(255,255,255,.12);
  flex:1.1;
}
.derid-input button {
  background:linear-gradient(135deg,#fff,#dcdcdc);
  color:#000;border:none;
  border-radius:10px;padding:12px 16px;
  font-weight:600;cursor:pointer;
  transition:all .25s ease;
}
.derid-input button:hover {
  background:#fff;
  transform:translateY(-1px);
}

/* ====== LOGIN PANEL ====== */
.login-panel {
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:22px 10px;
}
.login-panel input {
  background:rgba(255,255,255,.08);
  border:1px solid var(--ui-border);
  color:#fff;
  border-radius:12px;
  padding:12px 14px;
  font-size:14px;
  outline:none;
  transition:all .25s ease;
}
.login-panel input:focus {
  border-color:#fff;
  background:rgba(255,255,255,.14);
  box-shadow:0 0 10px rgba(255,255,255,.2);
}
.login-panel button {
  padding:12px 16px;
  border:none;
  border-radius:12px;
  cursor:pointer;
  font-weight:600;
  font-size:15px;
  background:linear-gradient(180deg,#ffffff 0%,#dcdcdc 100%);
  color:#000;
  box-shadow:0 2px 6px rgba(255,255,255,.08), inset 0 1px 0 rgba(255,255,255,.4);
  transition:all .25s ease;
}
.login-panel button:hover {
  background:linear-gradient(180deg,#ffffff 15%,#f3f3f3 100%);
  transform:translateY(-1px);
  box-shadow:0 4px 12px rgba(255,255,255,.2);
}
.login-panel a {
  color:#fff;
  opacity:.7;
  font-size:13px;
  text-decoration:none;
  text-align:center;
  transition:opacity .25s ease;
}
.login-panel a:hover {opacity:1;text-decoration:underline;}

/* ====== TICKETS ====== */
.ticket-list {display:flex;flex-direction:column;gap:8px;}
.ticket-item {
  padding:10px 12px;
  border-radius:10px;
  background:#1a1a1a;
  border:1px solid var(--ui-border);
  cursor:pointer;
  transition:all .25s ease;
}
.ticket-item:hover {
  background:#222;
  border-color:#fff;
  transform:translateY(-2px);
}
.ticket-item strong {color:#fff;font-weight:600;}
.ticket-item em {font-size:11px;color:rgba(255,255,255,.45);margin-left:6px;}
.ticket-item[style*="opacity:.6;"] {filter:grayscale(.8);}
#btnNewTicket {
  margin-top:10px;
  background:#fff;
  color:#000;
  font-weight:600;
  border:none;
  border-radius:10px;
  padding:10px 14px;
  cursor:pointer;
  transition:all .25s ease;
}
#btnNewTicket:hover {
  background:#f2f2f2;
  transform:translateY(-1px);
}

/* ====== TICKET HEADER ====== */
.ticket-head {
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:14px;
}
.btn-close-ticket {
  background:linear-gradient(145deg,#222,#333);
  color:#fff;
  border:none;
  padding:8px 16px;
  border-radius:8px;
  cursor:pointer;
  transition:.25s;
}
.btn-close-ticket:hover {
  background:linear-gradient(145deg,#333,#444);
  box-shadow:0 0 10px rgba(255,255,255,.15);
}

/* ====== BACK LINKS ====== */
a.back-link,
#backToChat,
#backToChat2 {
  display:inline-block;
  margin-top:10px;
  color:#fff;
  font-size:13px;
  text-decoration:none;
  font-weight:600;
  letter-spacing:.2px;
  transition:all .3s ease;
}
a.back-link:hover,
#backToChat:hover,
#backToChat2:hover {
  color:#fff;
  text-shadow:0 0 6px rgba(255,255,255,.6);
  transform:translateY(-1px);
}

/* Jemný svítící gradient linku */
#backToChat2 {
  background:linear-gradient(90deg,#fff,#dcdcdc,#fff);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  font-weight:700;
}
#backToChat2:hover {
  text-shadow:0 0 10px rgba(255,255,255,.8);
  transform:translateY(-1px) scale(1.02);
}