/* ═══════════════════════════════════════════════════════════════
   Sudoku — cursor-pointer.com
   Neon estetik. Tüm prefix: sd-
   ═══════════════════════════════════════════════════════════════ */

:root {
  --sd-bg-deep:  #0a0a18;
  --sd-bg-mid:   #0f0f1e;
  --sd-bg-light: #1a1a2e;
  --sd-pink:     #FF006E;
  --sd-orange:   #FF6B35;
  --sd-yellow:   #FFD23F;
  --sd-green:    #06D6A0;
  --sd-cyan:     #00B4D8;
  --sd-blue:     #3A86FF;
  --sd-purple:   #8338EC;
  --sd-red:      #FF073A;
  --sd-text:     #f8fafc;
  --sd-text-dim: rgba(248,250,252,.68);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; margin: 0; padding: 0; }
html, body { margin: 0; min-height: 100%; overscroll-behavior: none; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background:
    radial-gradient(circle at 20% 0%,  rgba(255,0,110,.13)   0%, transparent 40%),
    radial-gradient(circle at 80% 30%, rgba(58,134,255,.12)  0%, transparent 45%),
    radial-gradient(circle at 50% 100%,rgba(131,56,236,.16)  0%, transparent 55%),
    linear-gradient(180deg, var(--sd-bg-deep) 0%, var(--sd-bg-mid) 50%, var(--sd-bg-light) 100%);
  color: var(--sd-text);
  min-height: 100vh; min-height: 100svh; min-height: 100dvh;
  overflow: hidden;
  display: flex; justify-content: center; align-items: center;
}

.sd-shell {
  width: min(100vw, 520px);
  height: 100vh; height: 100svh; height: 100dvh;
  display: flex; flex-direction: column;
  padding: 64px 8px calc(8px + env(safe-area-inset-bottom));
  gap: 7px;
  position: relative;
}
@media (max-width: 480px) { .sd-shell { padding-top: 58px; padding-left: 6px; padding-right: 6px; } }

/* ═══ Status pills ══════════════════════════════════════════ */
.sd-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px;
  flex: 0 0 auto;
}
.sd-stat {
  background: rgba(15,15,30,.85);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 11px;
  padding: 6px 4px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.sd-stat::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--accent, var(--sd-cyan)), transparent 50%);
  opacity: .12; pointer-events: none;
}
.sd-stat-label {
  font-size: 9px; font-weight: 800; letter-spacing: 1px;
  color: var(--sd-text-dim); text-transform: uppercase; margin-bottom: 1px;
}
.sd-stat-value {
  font-size: 15px; font-weight: 900; line-height: 1.1; color: #fff;
}
.sd-stat.sd-time   { --accent: var(--sd-cyan); }
.sd-stat.sd-time .sd-stat-value   { color: var(--sd-cyan); text-shadow: 0 0 8px rgba(0,180,216,.45); }
.sd-stat.sd-diff   { --accent: var(--sd-blue); }
.sd-stat.sd-hearts { --accent: var(--sd-pink); }
.sd-stat.sd-hearts .sd-stat-value { color: var(--sd-pink); text-shadow: 0 0 8px rgba(255,0,110,.55); letter-spacing: 1px; }
.sd-stat.sd-hearts .sd-stat-value.sd-warning { animation: sdHeartPulse .5s ease-in-out infinite; }
.sd-stat.sd-coin { --accent: var(--sd-yellow); }
.sd-stat.sd-coin .sd-stat-value { color: var(--sd-yellow); text-shadow: 0 0 8px rgba(255,210,63,.45); }

/* ═══ Board ═════════════════════════════════════════════════ */
.sd-board-wrap {
  flex: 1 1 auto;
  min-height: 0;
  background: linear-gradient(145deg, rgba(15,15,30,.92), rgba(20,20,45,.88));
  border: 1px solid rgba(0,180,216,.20);
  border-radius: 16px;
  box-shadow: 0 10px 28px rgba(0,0,0,.40), inset 0 0 22px rgba(58,134,255,.06);
  display: flex; align-items: center; justify-content: center;
  padding: 8px;
  position: relative;
  overflow: hidden;
}
.sd-board {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(9, 1fr);
  background: rgba(0,0,0,.4);
  border: 2px solid rgba(0,180,216,.45);
  border-radius: 6px;
  user-select: none;
  /* Width set dynamically via JS */
}
.sd-cell {
  background: rgba(20,20,40,.85);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  color: #fff;
  cursor: pointer;
  position: relative;
  border: 1px solid rgba(255,255,255,.04);
  transition: background .15s, color .15s;
}
.sd-cell.sd-block-r { border-bottom: 2px solid rgba(0,180,216,.45); }
.sd-cell.sd-block-c { border-right:  2px solid rgba(0,180,216,.45); }

/* Sabit (clue) hücreler */
.sd-cell.sd-given {
  color: var(--sd-cyan);
  background: rgba(15,15,30,.95);
  cursor: default;
  text-shadow: 0 0 6px rgba(0,180,216,.30);
}
/* Kullanıcı girişi */
.sd-cell.sd-user {
  color: #fff;
  text-shadow: 0 0 8px rgba(255,255,255,.20);
}
/* Doğru tamamlanan */
.sd-cell.sd-correct.sd-user {
  color: var(--sd-green);
  text-shadow: 0 0 8px rgba(6,214,160,.50);
}

/* Selection states */
.sd-cell.sd-row-hl   { background: rgba(0,180,216,.10); }
.sd-cell.sd-col-hl   { background: rgba(0,180,216,.10); }
.sd-cell.sd-box-hl   { background: rgba(0,180,216,.13); }
.sd-cell.sd-same-num { background: rgba(58,134,255,.22); }
.sd-cell.sd-selected {
  background: rgba(255,210,63,.28);
  box-shadow: inset 0 0 0 2px var(--sd-yellow), 0 0 14px rgba(255,210,63,.35);
  z-index: 2;
}

/* Hata gösterimi (yanlış girilen sayı) */
.sd-cell.sd-error {
  color: var(--sd-red) !important;
  text-shadow: 0 0 10px rgba(255,7,58,.65) !important;
  animation: sdShake .35s ease-in-out;
}

/* Kalem notları (notes) */
.sd-cell .sd-notes {
  position: absolute; inset: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  font-size: 0.32em;
  color: rgba(248,250,252,.55);
  font-weight: 700;
  pointer-events: none;
  padding: 2px;
}
.sd-cell .sd-notes span {
  display: flex; align-items: center; justify-content: center;
}
.sd-cell.sd-has-value .sd-notes { display: none; }

/* ═══ Number pad ════════════════════════════════════════════ */
.sd-numpad {
  display: grid; grid-template-columns: repeat(9, 1fr); gap: 4px;
  flex: 0 0 auto;
}
.sd-num {
  aspect-ratio: 1/1;
  border: 1px solid rgba(0,180,216,.30);
  background: linear-gradient(145deg, rgba(20,20,40,.92), rgba(10,10,25,.92));
  color: #fff;
  border-radius: 10px;
  font-size: 18px;
  font-weight: 900;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  position: relative;
  transition: transform .08s, box-shadow .15s;
}
.sd-num:active {
  transform: scale(.92);
  box-shadow: 0 0 16px rgba(0,180,216,.45);
}
.sd-num.sd-completed {
  opacity: .35;
  border-color: rgba(255,255,255,.08);
}
.sd-num-count {
  position: absolute;
  bottom: 1px; right: 3px;
  font-size: 8px;
  color: var(--sd-text-dim);
  font-weight: 700;
}

/* ═══ Action buttons ════════════════════════════════════════ */
.sd-actions {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px;
  flex: 0 0 auto;
}
.sd-act {
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(15,15,30,.85);
  color: #fff;
  border-radius: 11px;
  padding: 9px 4px;
  font-size: 11px; font-weight: 700;
  cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  transition: transform .08s, background .15s;
  user-select: none;
}
.sd-act-emoji { font-size: 16px; line-height: 1; }
.sd-act:active { transform: scale(.94); background: rgba(58,134,255,.16); }
.sd-act-cost {
  font-size: 9px; color: var(--sd-yellow); font-weight: 800;
}
.sd-act.sd-disabled { opacity: .4; pointer-events: none; }
.sd-act.sd-pencil-active {
  border-color: var(--sd-yellow);
  background: linear-gradient(135deg, rgba(255,210,63,.20), rgba(255,107,53,.10));
  box-shadow: 0 0 12px rgba(255,210,63,.28);
}

/* ═══ Overlays ══════════════════════════════════════════════ */
.sd-overlay {
  position: absolute; inset: 0; z-index: 50;
  display: none; align-items: center; justify-content: center;
  background: rgba(5,8,18,.78);
  backdrop-filter: blur(10px);
  padding: 16px;
}
.sd-overlay.sd-show { display: flex; }
.sd-modal {
  width: min(94%, 380px); max-height: 92%; overflow: auto;
  background: linear-gradient(160deg, rgba(20,20,40,.98), rgba(10,10,25,.96));
  border: 1px solid rgba(0,180,216,.32);
  border-radius: 22px;
  padding: 22px 20px;
  box-shadow: 0 20px 50px rgba(0,0,0,.55), 0 0 32px rgba(0,180,216,.18);
  text-align: center;
}
.sd-modal h1 {
  font-size: 26px; margin-bottom: 6px; font-weight: 900;
  background: linear-gradient(90deg, var(--sd-cyan), var(--sd-pink), var(--sd-yellow));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.sd-modal h1.sd-lose-title {
  background: linear-gradient(90deg, var(--sd-pink), var(--sd-orange));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.sd-modal p { color: var(--sd-text-dim); margin-bottom: 12px; line-height: 1.5; font-size: 14px; }

.sd-info-box {
  background: linear-gradient(135deg, rgba(0,180,216,.10), rgba(58,134,255,.06));
  border: 1px solid rgba(0,180,216,.22);
  border-radius: 12px;
  padding: 9px 12px;
  margin: 6px 0;
  font-weight: 800;
  color: #dffcff;
  font-size: 13px;
}
.sd-info-box.sd-warm {
  background: linear-gradient(135deg, rgba(255,210,63,.12), rgba(255,107,53,.08));
  border-color: rgba(255,210,63,.34);
  color: var(--sd-yellow);
}
.sd-info-box.sd-best {
  background: rgba(6,214,160,.10);
  border-color: rgba(6,214,160,.34);
  color: var(--sd-green);
}

.sd-btn {
  width: 100%;
  padding: 12px 14px;
  font-size: 15px; font-weight: 900;
  border: 0; border-radius: 14px;
  background: linear-gradient(135deg, var(--sd-cyan), var(--sd-blue), var(--sd-purple));
  color: #fff; cursor: pointer;
  margin-top: 10px;
  box-shadow: 0 6px 18px rgba(58,134,255,.30);
  transition: transform .08s, filter .15s;
}
.sd-btn:active { transform: scale(.97); filter: brightness(1.15); }
.sd-btn.sd-btn-warm {
  background: linear-gradient(135deg, var(--sd-pink), var(--sd-orange), var(--sd-yellow));
  box-shadow: 0 6px 18px rgba(255,107,53,.30);
}
.sd-btn.sd-btn-ghost { background: transparent; border: 1px solid rgba(255,255,255,.18); box-shadow: none; }

/* Diff picker */
.sd-grid-2x2 {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px;
  margin: 10px 0;
}
.sd-pick {
  padding: 12px 6px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(15,15,30,.78);
  color: var(--sd-text-dim);
  border-radius: 14px;
  font-size: 13px; font-weight: 800;
  cursor: pointer;
  text-align: center;
  display: flex; flex-direction: column; gap: 2px; align-items: center;
  transition: all .15s;
}
.sd-pick-name { font-size: 14px; color: #fff; }
.sd-pick-meta { font-size: 10px; opacity: .7; font-weight: 600; }
.sd-pick:active { transform: scale(.95); }
.sd-pick.sd-active {
  color: #fff;
  border-color: var(--sd-cyan);
  background: linear-gradient(135deg, rgba(0,180,216,.18), rgba(58,134,255,.10));
  box-shadow: 0 0 14px rgba(0,180,216,.28);
}

/* Settings */
.sd-settings-list { display: flex; flex-direction: column; gap: 8px; margin: 12px 0; }
.sd-settings-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; border-radius: 14px;
  border: 1px solid rgba(0,180,216,.20);
  background: rgba(0,180,216,.05);
  text-align: left; gap: 10px;
}
.sd-settings-row strong { display: block; font-size: 14px; color: #fff; }
.sd-settings-row span { display: block; font-size: 11px; color: var(--sd-text-dim); margin-top: 2px; line-height: 1.3; }
.sd-toggle {
  min-width: 70px; padding: 8px 10px;
  border-radius: 999px; border: 0; cursor: pointer;
  font-size: 12px; font-weight: 800;
  background: linear-gradient(135deg, var(--sd-cyan), var(--sd-blue));
  color: #fff;
}
.sd-toggle.sd-off {
  background: rgba(15,15,30,.85);
  border: 1px solid rgba(255,255,255,.12);
  color: var(--sd-text-dim);
}

/* Loading spinner */
.sd-loading {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.sd-spinner {
  width: 40px; height: 40px;
  border: 3px solid rgba(0,180,216,.18);
  border-top-color: var(--sd-cyan);
  border-radius: 50%;
  animation: sdSpin .9s linear infinite;
}

/* ═══ Animations ═══════════════════════════════════════════ */
@keyframes sdHeartPulse {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.10); }
}
@keyframes sdShake {
  0%, 100% { transform: translateX(0); }
  25%      { transform: translateX(-3px); }
  75%      { transform: translateX(3px); }
}
@keyframes sdSpin {
  to { transform: rotate(360deg); }
}
@keyframes sdBoardGlow {
  0%, 100% { box-shadow: 0 10px 24px rgba(0,0,0,.35), 0 0 22px rgba(0,180,216,.10), inset 0 0 18px rgba(58,134,255,.05); }
  50%      { box-shadow: 0 10px 24px rgba(0,0,0,.35), 0 0 32px rgba(0,180,216,.22), inset 0 0 26px rgba(58,134,255,.12); }
}
.sd-board-wrap { animation: sdBoardGlow 4s ease-in-out infinite; }

@keyframes sdWinFlash {
  0%, 100% { background: rgba(20,20,40,.85); }
  50%      { background: rgba(6,214,160,.30); }
}
.sd-cell.sd-win-flash { animation: sdWinFlash .5s ease-in-out 2; }

/* Compact mobile */
@media (max-height: 700px) {
  .sd-shell { gap: 5px; padding-top: 56px; }
  .sd-stat-value { font-size: 13px; }
  .sd-stat-label { font-size: 8px; }
  .sd-num { font-size: 16px; border-radius: 9px; }
  .sd-act { padding: 7px 4px; font-size: 10px; }
  .sd-act-emoji { font-size: 14px; }
  .sd-modal { padding: 16px 14px; }
  .sd-modal h1 { font-size: 22px; }
}
@media (max-height: 600px) {
  .sd-shell { gap: 3px; padding-top: 50px; }
  .sd-num { font-size: 14px; }
}