/* === WaktuKu Design System === */
:root{
  --bg:#0b0f1a;
  --bg-2:#0f1424;
  --surface:rgba(255,255,255,0.06);
  --surface-2:rgba(255,255,255,0.10);
  --border:rgba(255,255,255,0.12);
  --text:#e9ecf5;
  --muted:#9aa3b8;
  --primary:#7df9ff;
  --primary-2:#b388ff;
  --accent:#ff8a65;
  --success:#81c784;
  --warn:#ffb74d;
  --danger:#ef5350;
  --radius:16px;
  --shadow:0 10px 40px rgba(0,0,0,0.35);
  --gradient:linear-gradient(135deg,var(--primary),var(--primary-2));
  --font-display:'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--font-body);
  background:radial-gradient(1200px 800px at 10% -10%, #1a2244 0%, transparent 60%),
             radial-gradient(900px 700px at 110% 10%, #2a1a44 0%, transparent 60%),
             var(--bg);
  color:var(--text);
  min-height:100vh;
  overflow-x:hidden;
}

/* aurora */
.aurora{position:fixed;inset:0;overflow:hidden;z-index:-1;pointer-events:none}
.aurora span{
  position:absolute;width:520px;height:520px;border-radius:50%;
  filter:blur(120px);opacity:.35;animation:float 18s infinite ease-in-out;
}
.aurora span:nth-child(1){background:#7df9ff;top:-120px;left:-100px}
.aurora span:nth-child(2){background:#b388ff;bottom:-150px;right:-80px;animation-delay:-6s}
.aurora span:nth-child(3){background:#ff8a65;top:40%;left:50%;animation-delay:-12s;opacity:.22}
@keyframes float{
  0%,100%{transform:translate(0,0) scale(1)}
  50%{transform:translate(40px,-30px) scale(1.1)}
}

/* topbar */
.topbar{
  display:flex;align-items:center;gap:16px;padding:18px 28px;
  background:rgba(11,15,26,0.6);backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50;
  flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:12px}
.brand h1{margin:0;font-size:22px;font-weight:700;background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:.5px}
.tag{margin:2px 0 0;font-size:12px;color:var(--muted)}
.logo{filter:drop-shadow(0 4px 10px rgba(125,249,255,.4))}
.nav{display:flex;gap:6px;flex:1;justify-content:center;flex-wrap:wrap}
.nav-btn{
  background:transparent;border:1px solid transparent;color:var(--muted);
  padding:9px 16px;border-radius:999px;cursor:pointer;font-size:14px;
  transition:.25s;
}
.nav-btn:hover{color:var(--text);background:var(--surface)}
.nav-btn.active{
  color:#0b0f1a;background:var(--gradient);font-weight:600;
  box-shadow:0 6px 20px rgba(125,249,255,.3);
}
.topbar-right{display:flex;gap:8px}
.icon-btn{
  display:flex;align-items:center;gap:6px;background:var(--surface);
  border:1px solid var(--border);color:var(--text);
  padding:9px 14px;border-radius:999px;cursor:pointer;transition:.25s;font-size:13px;
}
.icon-btn:hover{background:var(--surface-2);transform:translateY(-1px)}
.icon-btn.playing{background:var(--gradient);color:#0b0f1a;border-color:transparent}
.icon-btn .ic{font-size:16px}

/* main layout */
main{max-width:1200px;margin:0 auto;padding:28px 20px 80px}
.tab{display:none;animation:fadeIn .4s ease}
.tab.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* cards */
.card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:22px;margin-bottom:20px;
  backdrop-filter:blur(14px);box-shadow:var(--shadow);
  transition:.3s;
}
.card:hover{border-color:rgba(125,249,255,.25)}
.card h3{margin:0 0 12px;font-size:16px;letter-spacing:.3px}
.muted{color:var(--muted)}
.small{font-size:12px}

.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-bottom:20px}

/* clock cards */
.clock-card{position:relative;overflow:hidden}
.clock-card::before{content:"";position:absolute;inset:0;background:var(--gradient);opacity:.08;pointer-events:none}
.clock-card.alt::before{background:linear-gradient(135deg,#ff8a65,#b388ff)}
.clock-card.alt2::before{background:linear-gradient(135deg,#81c784,#7df9ff)}
.clock-time{font-size:38px;font-weight:700;letter-spacing:2px;font-variant-numeric:tabular-nums;background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent}
.clock-card.alt .clock-time{background:linear-gradient(135deg,#ff8a65,#b388ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.clock-card.alt2 .clock-time{background:linear-gradient(135deg,#81c784,#7df9ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.clock-date{color:var(--muted);font-size:13px;margin:4px 0 8px}
.clock-card small{color:var(--muted);font-size:11px;letter-spacing:1px;text-transform:uppercase}

/* next holiday */
.next-holiday{font-size:18px;font-weight:600}
.next-holiday small{display:block;color:var(--muted);font-weight:400;margin-top:4px;font-size:13px}
.mini-list{list-style:none;padding:0;margin:0}
.mini-list li{padding:8px 0;border-bottom:1px solid var(--border);font-size:14px;display:flex;justify-content:space-between;gap:12px}
.mini-list li:last-child{border-bottom:none}
.mini-list .when{color:var(--muted);font-size:12px}

/* calendar */
.cal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.cal-header h2{margin:0;font-size:20px}
.ghost-btn{background:var(--surface);border:1px solid var(--border);color:var(--text);width:38px;height:38px;border-radius:50%;cursor:pointer;font-size:18px;transition:.2s}
.ghost-btn:hover{background:var(--gradient);color:#0b0f1a;border-color:transparent}
.cal-weekdays{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;margin-bottom:8px;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:1px}
.cal-weekdays span{text-align:center;padding:6px 0}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}
.cal-day{
  aspect-ratio:1;background:var(--surface);border:1px solid var(--border);
  border-radius:10px;display:flex;flex-direction:column;align-items:center;
  justify-content:center;font-size:14px;cursor:pointer;transition:.2s;position:relative;
}
.cal-day:hover{transform:translateY(-2px);border-color:var(--primary)}
.cal-day.muted{opacity:.3}
.cal-day.today{background:var(--gradient);color:#0b0f1a;font-weight:700;border-color:transparent}
.cal-day.has-holiday{border-color:var(--danger)}
.cal-day.has-reminder::after{content:"";position:absolute;bottom:5px;width:5px;height:5px;border-radius:50%;background:var(--accent)}
.cal-day .label{font-size:9px;color:var(--danger);margin-top:2px;line-height:1;text-align:center;padding:0 2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}
.cal-day.today .label{color:#0b0f1a}
.legend{display:flex;gap:18px;margin-top:14px;font-size:12px;color:var(--muted);flex-wrap:wrap}
.legend .dot{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px;vertical-align:middle}
.legend .today{background:var(--gradient)}
.legend .holiday{background:var(--danger)}
.legend .reminder{background:var(--accent)}

.holiday-list{list-style:none;padding:0;margin:0;max-height:380px;overflow:auto}
.holiday-list li{padding:10px 0;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;gap:12px;font-size:14px}
.holiday-list li:last-child{border-bottom:none}
.holiday-list .date{color:var(--primary);font-weight:600;min-width:120px}

/* forms */
.form-row{display:flex;gap:10px;flex-wrap:wrap}
.form-row input,.form-row select{
  flex:1;min-width:160px;background:var(--bg-2);border:1px solid var(--border);
  color:var(--text);padding:10px 14px;border-radius:10px;font-size:14px;outline:none;
}
.form-row input:focus,.form-row select:focus{border-color:var(--primary)}
.primary-btn{
  background:var(--gradient);border:none;color:#0b0f1a;padding:10px 20px;
  border-radius:10px;font-weight:600;cursor:pointer;font-size:14px;transition:.25s;
  box-shadow:0 6px 18px rgba(125,249,255,.25);
}
.primary-btn:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(125,249,255,.4)}

/* reminders */
.reminder-list{list-style:none;padding:0;margin:0}
.reminder-item{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:14px;background:var(--bg-2);border:1px solid var(--border);
  border-radius:12px;margin-bottom:10px;
}
.reminder-item .info{flex:1}
.reminder-item .info b{display:block;font-size:15px;margin-bottom:4px}
.reminder-item .info .when{color:var(--muted);font-size:12px}
.reminder-item .badge{padding:3px 10px;border-radius:999px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}
.badge.low{background:rgba(129,199,132,.2);color:var(--success)}
.badge.med{background:rgba(255,183,77,.2);color:var(--warn)}
.badge.high{background:rgba(239,83,80,.2);color:var(--danger)}
.del-btn{background:transparent;border:none;color:var(--muted);cursor:pointer;font-size:18px;padding:4px 10px}
.del-btn:hover{color:var(--danger)}

/* games */
.game-card{text-align:center;cursor:pointer;transition:.3s}
.game-card:hover{transform:translateY(-4px)}
.game-emoji{font-size:48px;margin-bottom:8px}
.game-area{min-height:300px}
.game-area.hidden{display:none}

.memory-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;max-width:480px;margin:20px auto}
.memory-cell{aspect-ratio:1;background:var(--gradient);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:32px;cursor:pointer;color:transparent;transition:.3s;user-select:none}
.memory-cell.flipped{background:var(--surface-2);color:var(--text)}
.memory-cell.matched{background:rgba(129,199,132,.3);color:var(--success);cursor:default}

.math-area{text-align:center;padding:20px}
.math-q{font-size:40px;margin:20px 0;font-weight:700;background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent}
.math-area input{font-size:24px;padding:12px 20px;text-align:center;width:160px;background:var(--bg-2);border:2px solid var(--border);border-radius:12px;color:var(--text);outline:none}
.math-area input:focus{border-color:var(--primary)}
.score-row{display:flex;justify-content:center;gap:30px;font-size:14px;color:var(--muted);margin-bottom:14px}
.score-row b{color:var(--primary);font-size:18px}

.word-area{padding:20px;text-align:center}
.word-clue{font-size:18px;margin:14px 0;color:var(--muted)}
.word-blanks{font-size:32px;letter-spacing:14px;margin:20px 0;font-weight:700;font-family:monospace}
.word-letters{display:flex;flex-wrap:wrap;justify-content:center;gap:6px;max-width:520px;margin:20px auto}
.word-letters button{
  width:38px;height:38px;border-radius:8px;border:1px solid var(--border);
  background:var(--surface);color:var(--text);cursor:pointer;font-weight:600;transition:.2s
}
.word-letters button:hover:not(:disabled){background:var(--gradient);color:#0b0f1a}
.word-letters button:disabled{opacity:.3;cursor:not-allowed}

/* avatar */
.avatar-stage{display:flex;flex-direction:column;align-items:center;gap:14px}
.avatar-preview{width:240px;height:240px;background:radial-gradient(circle at 50% 30%,var(--surface-2),var(--bg-2));border-radius:50%;display:flex;align-items:center;justify-content:center;border:2px solid var(--border)}
.avatar-preview svg{width:200px;height:200px}
.avatar-stage input{
  background:var(--bg-2);border:1px solid var(--border);color:var(--text);
  padding:10px 14px;border-radius:10px;font-size:14px;width:100%;max-width:280px;text-align:center;outline:none;
}
.avatar-controls{display:flex;flex-direction:column;gap:14px}
.avatar-controls label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.swatches{display:flex;gap:8px;margin-top:6px;flex-wrap:wrap}
.swatches span{width:36px;height:36px;border-radius:50%;cursor:pointer;border:2px solid transparent;transition:.2s}
.swatches span:hover{transform:scale(1.1)}
.swatches span.active{border-color:var(--primary);box-shadow:0 0 0 2px var(--bg)}
.chips{display:flex;gap:6px;margin-top:6px;flex-wrap:wrap}
.chip{
  background:var(--surface);border:1px solid var(--border);color:var(--text);
  padding:6px 14px;border-radius:999px;cursor:pointer;font-size:13px;transition:.2s
}
.chip:hover{background:var(--surface-2)}
.chip.active{background:var(--gradient);color:#0b0f1a;font-weight:600;border-color:transparent}

/* footer */
footer{text-align:center;padding:20px;color:var(--muted);font-size:13px;border-top:1px solid var(--border);margin-top:40px}

/* toast */
.toast{
  position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(80px);
  background:var(--surface-2);backdrop-filter:blur(20px);border:1px solid var(--border);
  padding:12px 22px;border-radius:999px;font-size:14px;z-index:200;
  transition:.4s cubic-bezier(.2,.9,.3,1.4);opacity:0;
}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1}

@media(max-width:640px){
  .topbar{padding:14px}
  .nav{order:3;width:100%;justify-content:flex-start;overflow-x:auto;flex-wrap:nowrap}
  .clock-time{font-size:30px}
  .memory-grid{grid-template-columns:repeat(4,1fr)}
}