.iu-quiz{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;max-width:860px;margin:18px auto;padding:0 12px}
.iu-quiz-card{background:#ffffff;border:1px solid rgba(0,0,0,.08);border-radius:14px;box-shadow:0 10px 30px rgba(10,20,60,.06);padding:18px 18px 16px}
.iu-quiz-start{background:linear-gradient(180deg,#ffffff 0%,#f5f7fb 100%)}
.iu-quiz-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
.iu-quiz-title{font-size:20px;font-weight:700;color:#0b1b2b;letter-spacing:.2px}
.iu-audio-toggle{border:1px solid rgba(0,0,0,.12);background:#fff;border-radius:999px;padding:8px 12px;cursor:pointer;font-weight:600;color:#1c2b3a}
.iu-audio-toggle.is-muted{opacity:.75}
.iu-quiz-form label{display:block;margin:10px 0 8px}
.iu-quiz-form span{display:block;font-weight:600;color:#1c2b3a;margin-bottom:6px}
.iu-quiz-form input{width:100%;padding:12px 12px;border-radius:12px;border:1px solid rgba(0,0,0,.14);background:#fff;color:#111;font-size:15px;outline:none}
.iu-quiz-form input:focus{border-color:#0878e0;box-shadow:0 0 0 4px rgba(8,120,224,.12)}
.iu-start-btn{width:100%;margin-top:10px;padding:12px 14px;border:0;border-radius:12px;background:#0878e0;color:#fff;font-size:16px;font-weight:700;cursor:pointer}
.iu-start-btn:hover{filter:brightness(.98)}
.iu-quiz-note{margin-top:10px;color:#516476;font-size:13px}
.iu-quiz-msg{margin-top:10px;font-weight:600;color:#b00020}

.iu-quiz-stage{background:linear-gradient(180deg,#ffffff 0%,#f7f9ff 100%)}
.iu-quiz-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.iu-progress{font-weight:700;color:#0b1b2b}

.iu-timer{flex:1;display:flex;align-items:center;justify-content:flex-end;gap:10px}
.iu-timer-bar{width:260px;max-width:50vw;height:10px;border-radius:999px;background:rgba(8,120,224,.12);overflow:hidden}
.iu-timer-fill{height:100%;width:100%;background:#0878e0;transform-origin:left center}
.iu-timer-text{min-width:56px;text-align:right;color:#0b1b2b;font-weight:700}

.iu-question{font-size:18px;font-weight:800;color:#0b1b2b;line-height:1.35;margin:8px 0 14px}

.iu-options{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:640px){.iu-options{grid-template-columns:1fr}}

.iu-opt{display:flex;align-items:center;gap:10px;width:100%;text-align:left;border:1px solid rgba(0,0,0,.12);border-radius:14px;background:#fff;padding:12px 12px;cursor:pointer;transition:transform .06s ease,box-shadow .12s ease,border-color .12s ease}
.iu-opt:hover{box-shadow:0 10px 18px rgba(10,20,60,.08);transform:translateY(-1px)}
.iu-opt:disabled{cursor:not-allowed;opacity:.75}

.iu-opt-badge{display:inline-flex;align-items:center;justify-content:center;min-width:32px;height:32px;border-radius:10px;background:rgba(8,120,224,.12);color:#0b1b2b;font-weight:900}
.iu-opt-text{color:#0b1b2b;font-weight:700;line-height:1.25}

.iu-opt.is-selected{border-color:#0878e0;box-shadow:0 0 0 4px rgba(8,120,224,.12)}
.iu-opt.is-correct{border-color:rgba(10,122,61,.45);box-shadow:0 0 0 4px rgba(10,122,61,.12);background:linear-gradient(180deg,#ffffff 0%,rgba(10,122,61,.06) 100%)}
.iu-opt.is-wrong{border-color:rgba(176,0,32,.45);box-shadow:0 0 0 4px rgba(176,0,32,.12);background:linear-gradient(180deg,#ffffff 0%,rgba(176,0,32,.06) 100%)}

.iu-actions{display:flex;justify-content:flex-end;margin-top:14px}
.iu-confirm{border:0;border-radius:12px;padding:11px 14px;background:#0b1b2b;color:#fff;font-weight:800;cursor:pointer}
.iu-confirm:disabled{opacity:.45;cursor:not-allowed}

.iu-reveal{margin-top:12px;padding:12px 12px;border-radius:12px;background:rgba(11,27,43,.04);color:#0b1b2b;font-weight:700}

/* Next question countdown */
.iu-next{margin-top:10px;padding:10px 12px;border-radius:12px;background:rgba(8,120,224,.06);border:1px solid rgba(8,120,224,.18);color:#0b1b2b;font-weight:800}
.iu-next-row{display:flex;align-items:center;justify-content:center;gap:6px;margin-bottom:8px}
.iu-next-label{color:#1c2b3a;font-weight:900}
.iu-next-sec{font-variant-numeric:tabular-nums;font-size:18px}
.iu-next-bar{height:10px;border-radius:999px;background:rgba(8,120,224,.12);overflow:hidden}
.iu-next-fill{height:100%;width:100%;background:#0878e0;transform-origin:left center}

/* Transition animation (visual) */
@keyframes iuSlideOut{from{opacity:1;transform:translateX(0)}to{opacity:0;transform:translateX(-12px)}}
@keyframes iuSlideIn{from{opacity:0;transform:translateX(12px)}to{opacity:1;transform:translateX(0)}}
.iu-swap-out{animation:iuSlideOut .18s ease forwards}
.iu-swap-in{animation:iuSlideIn .22s ease forwards}

.iu-quiz-result{background:linear-gradient(180deg,#ffffff 0%,#f5f7fb 100%)}
.iu-result-title{font-size:20px;font-weight:900;color:#0b1b2b;margin-bottom:8px}
.iu-result-summary{font-size:16px;font-weight:800;color:#0b1b2b}
.iu-result-extra{margin-top:10px;color:#516476;font-weight:600}

.iu-quiz-error{background:#fff;border:1px solid rgba(176,0,32,.35);padding:14px;border-radius:12px;color:#b00020;font-weight:700}

/* Winners */
.iu-winners{max-width:860px;margin:18px auto;padding:0 12px;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}
.iu-winners-title{font-size:18px;font-weight:900;color:#0b1b2b;margin-bottom:10px}
.iu-winners-list{list-style:none;padding:0;margin:0;background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:14px;overflow:hidden}
.iu-winners-list li{display:flex;justify-content:space-between;gap:10px;padding:12px 14px;border-top:1px solid rgba(0,0,0,.06)}
.iu-winners-list li:first-child{border-top:0}
.iu-w-name{font-weight:800;color:#0b1b2b}
.iu-w-phone{font-weight:800;color:#516476}
.iu-winners-empty{background:#fff;border:1px solid rgba(0,0,0,.08);padding:12px 14px;border-radius:14px;color:#516476;font-weight:700}

/* Invite / Referans (Arkadaşına öner) */
.iu-invite{background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:14px;padding:14px 14px 12px;margin:0 0 12px;box-shadow:0 10px 22px rgba(0,0,0,.05)}
.iu-invite-title{font-size:16px;font-weight:900;color:#0b1b2b;margin-bottom:6px}
.iu-invite-desc{color:#516476;font-weight:700;line-height:1.35;margin-bottom:10px}
.iu-invite-form{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap}
.iu-invite-form label{flex:1;min-width:220px}
.iu-invite-form label span{display:block;font-size:12px;font-weight:800;color:#3d556a;margin:0 0 6px}
.iu-invite-form input{width:100%;padding:12px 12px;border-radius:12px;border:1px solid rgba(0,0,0,.12);outline:none;font-weight:800}
.iu-invite-add{padding:12px 14px;border-radius:12px;border:0;background:#0878e0;color:#fff;font-weight:900;cursor:pointer}
.iu-invite-add:disabled{opacity:.65;cursor:not-allowed}
.iu-invite-msg{margin-top:10px;font-weight:800}
.iu-invite-msg.is-ok{color:#0a7a3d}
.iu-invite-msg.is-err{color:#b42318}
.iu-invite-subtitle{margin-top:12px;font-weight:900;color:#0b1b2b}
.iu-invite-list{list-style:none;margin:8px 0 0;padding:0;border-top:1px dashed rgba(0,0,0,.12)}
.iu-invite-empty{padding:10px 2px;color:#516476;font-weight:700}
.iu-invite-item{display:flex;justify-content:space-between;gap:10px;padding:10px 2px;border-top:1px dashed rgba(0,0,0,.12);align-items:center;flex-wrap:wrap}
.iu-invite-item:first-child{border-top:0}
.iu-invite-name{font-weight:900;color:#0b1b2b}
.iu-invite-code-wrap{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.iu-invite .iu-invite-code{padding:9px 10px;border-radius:10px;border:1px solid rgba(0,0,0,.12);font-weight:900;letter-spacing:.04em;min-width:140px;text-align:center}
.iu-invite .iu-invite-copy{padding:9px 10px;border-radius:10px;border:1px solid rgba(0,0,0,.12);background:#f5f8ff;font-weight:900;cursor:pointer}
.iu-invite .iu-invite-copy:disabled{opacity:.65;cursor:not-allowed}
.iu-invite .iu-invite-status{padding:7px 10px;border-radius:999px;font-weight:900;font-size:12px;border:1px solid rgba(0,0,0,.08)}
.iu-invite .iu-invite-status.st-won{background:#ecfdf3;color:#0a7a3d}
.iu-invite .iu-invite-status.st-notwon{background:#fff7ed;color:#9a3412}
.iu-invite .iu-invite-status.st-notjoined{background:#f2f4f7;color:#344054}

/* Referral kartı (yarışma bittiğinde görünür) */
.iu-result-text{margin-top:8px;color:#516476;font-weight:650}
.iu-ref-card{margin-top:12px;border-radius:16px;padding:14px;border:1px solid rgba(8,120,224,.20);background:linear-gradient(180deg,rgba(8,120,224,.06) 0%,rgba(255,255,255,1) 65%);box-shadow:0 14px 28px rgba(8,120,224,.10)}
.iu-ref-head{margin-bottom:12px}
.iu-ref-title{font-size:16px;font-weight:900;color:#0b1b2b;margin-bottom:4px}
.iu-ref-sub{color:#3d556a;font-weight:750;line-height:1.35}
.iu-ref-codebox{display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:14px;padding:12px}
.iu-ref-label{font-size:12px;font-weight:900;color:#3d556a;text-transform:uppercase;letter-spacing:.06em}
.iu-ref-code{flex:1;text-align:center;font-weight:950;font-size:20px;letter-spacing:.12em;color:#0878e0;padding:6px 8px;border-radius:12px;background:rgba(8,120,224,.08);border:1px dashed rgba(8,120,224,.35)}
.iu-ref-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.iu-ref-btn{appearance:none;-webkit-appearance:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;padding:11px 12px;font-weight:900;text-decoration:none;border:1px solid rgba(0,0,0,.12);background:#fff;color:#0b1b2b;cursor:pointer}
.iu-ref-btn:hover{filter:brightness(.98)}
.iu-ref-copy-code{background:#0878e0;border-color:rgba(8,120,224,.45);color:#fff}
.iu-ref-wa{background:#0a7a3d;border-color:rgba(10,122,61,.45);color:#fff}
.iu-ref-share{background:#0b1b2b;border-color:rgba(11,27,43,.55);color:#fff}
.iu-ref-meta{margin-top:10px;color:#516476;font-weight:800}
@media (max-width:640px){
  .iu-ref-codebox{flex-direction:column;align-items:stretch}
  .iu-ref-code{text-align:center}
  .iu-ref-actions{flex-direction:column}
  .iu-ref-btn{width:100%}
}