/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── FONTS ── */
@import url('https://fonts.googleapis.com/css2?family=Rajdhani:wght@400;500;600;700&family=Barlow+Condensed:wght@400;600;700;800;900&family=Share+Tech+Mono&display=swap');

/* ── VARIABLES ── */
:root {
  --bg:        #05080f;
  --panel:     #080d18;
  --surface:   #0c1220;
  --border:    rgba(0,210,255,0.18);
  --border-h:  rgba(0,210,255,0.55);
  --cyan:      #00d2ff;
  --cyan-dim:  #00a0c0;
  --red:       #ff2d55;
  --gold:      #ffcc00;
  --gold-dim:  #cc9900;
  --green:     #00ff88;
  --text:      #c8dff0;
  --text-dim:  #5a7a94;
  --font-hud:  'Share Tech Mono', monospace;
  --font-ui:   'Rajdhani', sans-serif;
  --font-hero: 'Barlow Condensed', sans-serif;
}

/* ── BODY ── */
body {
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  overflow-x: hidden;
  cursor: crosshair;
  position: relative;
}

/* Scanline overlay for CRT feel */
body::before {
  content: '';
  position: fixed; inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.025) 2px,
    rgba(0,0,0,0.025) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* Tactical grid background */
body::after {
  content: '';
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(0,210,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,210,255,0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ── TITLE ── */
h1 {
  font-family: var(--font-hero);
  font-size: 3.8rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin: 40px 0 2px;
  position: relative;
  z-index: 1;
  line-height: 1;
  color: #fff;
  text-shadow: 0 0 20px var(--cyan), 0 0 60px rgba(0,210,255,0.25);
}
h1::after {
  content: '';
  display: block;
  width: 80px;
  height: 2px;
  background: var(--cyan);
  margin: 8px auto 0;
  box-shadow: 0 0 12px var(--cyan);
}

.subtitle {
  font-family: var(--font-hud);
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

/* ── PANEL (clipped corners — tactical shape) ── */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  position: relative;
  z-index: 1;
  clip-path: polygon(20px 0%, 100% 0%, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0% 100%, 0% 20px);
}
.panel::after {
  content: '';
  position: absolute;
  top: 7px; right: 7px;
  width: 5px; height: 5px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--cyan);
  animation: blink 2.2s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.15} }

/* ── MENU CARD ── */
#menu-card {
  width: min(520px, 95vw);
  padding: 36px 32px 32px;
  margin-top: 4px;
  animation: slideDown 0.45s cubic-bezier(0.22,1,0.36,1);
}
#menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.menu-hint {
  font-family: var(--font-hud);
  font-size: 0.68rem;
  letter-spacing: 0.25em;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* ── DIFFICULTY BUTTONS ── */
.diff-row { display: flex; gap: 10px; width: 100%; }

.diff-btn {
  flex: 1;
  padding: 14px 12px;
  font-family: var(--font-hero);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  background: var(--surface);
  border: 1px solid rgba(0,210,255,0.18);
  color: var(--text-dim);
  clip-path: polygon(4px 0%, 100% 0%, calc(100% - 4px) 100%, 0% 100%);
  transition: all 0.18s ease;
  position: relative;
}
.diff-btn:hover { color: var(--cyan); border-color: var(--cyan-dim); background: rgba(0,210,255,0.07); transform: translateY(-2px); }
.diff-btn[onclick*="easy"].active   { background: var(--green); border-color: var(--green); color: #001a0a; box-shadow: 0 0 20px rgba(0,255,136,0.5); }
.diff-btn[onclick*="medium"].active { background: var(--cyan);  border-color: var(--cyan);  color: #000d14; box-shadow: 0 0 20px rgba(0,210,255,0.5); }
.diff-btn[onclick*="hard"].active   { background: var(--red);   border-color: var(--red);   color: #1a000a; box-shadow: 0 0 20px rgba(255,45,85,0.5); }

/* ── START BUTTON ── */
#start-btn {
  width: 100%;
  padding: 16px 20px;
  font-family: var(--font-hero);
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  cursor: pointer;
  background: transparent;
  border: 1px solid rgba(255,204,0,0.2);
  color: rgba(255,204,0,0.25);
  clip-path: polygon(6px 0%, 100% 0%, calc(100% - 6px) 100%, 0% 100%);
  transition: all 0.22s ease;
  pointer-events: none;
}
#start-btn.ready {
  pointer-events: all;
  color: #0a0800;
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 28px rgba(255,204,0,0.45);
  animation: pulseGold 1.8s ease-in-out infinite;
}
@keyframes pulseGold {
  0%,100% { box-shadow: 0 0 22px rgba(255,204,0,0.4); }
  50%      { box-shadow: 0 0 48px rgba(255,204,0,0.75), 0 0 80px rgba(255,204,0,0.15); }
}
#start-btn.ready:hover { transform: translateY(-2px); animation: none; box-shadow: 0 0 55px rgba(255,204,0,0.85); }

/* ── STATS BAR ── */
#stats-bar {
  display: none;
  align-items: stretch;
  gap: 2px;
  margin: 10px 0 0;
  width: min(960px, 95vw);
  position: relative;
  z-index: 1;
}
.stat-cell {
  flex: 1;
  background: var(--panel);
  border: 1px solid var(--border);
  border-bottom: 2px solid var(--cyan);
  padding: 10px 16px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stat-cell:first-child { border-left: 2px solid var(--cyan); }
.stat-cell:last-child  { border-right: 2px solid var(--cyan); }
.stat-lbl { font-family: var(--font-hud); font-size: 0.58rem; letter-spacing: 0.2em; color: var(--text-dim); text-transform: uppercase; }
.stat-val { font-family: var(--font-hud); font-size: 1.3rem; color: var(--cyan); line-height: 1; }
#s-time { color: var(--gold); }
#s-time.danger { color: var(--red); animation: flashRed 0.5s ease-in-out infinite; }
@keyframes flashRed { 0%,100%{opacity:1} 50%{opacity:0.35} }

/* ── STREAK BAR ── */
#streak-row {
  display: none;
  align-items: center;
  gap: 10px;
  font-family: var(--font-hud);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  margin: 4px 0;
  position: relative;
  z-index: 1;
  text-transform: uppercase;
}
#streak-track {
  width: 180px;
  height: 4px;
  background: rgba(255,255,255,0.05);
  border-radius: 2px;
  overflow: visible;
  position: relative;
}
#streak-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--gold));
  border-radius: 2px;
  transition: width 0.14s ease;
  box-shadow: 0 0 8px rgba(0,210,255,0.6);
  position: relative;
}
#streak-fill::after {
  content: '';
  position: absolute;
  right: -4px; top: -4px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 10px var(--gold);
  opacity: 0;
  transition: opacity 0.15s;
}
#streak-fill.has-progress::after { opacity: 1; }

/* ── GAME AREA ── */
#game-area {
  width: min(960px, 95vw);
  min-height: 52vh;
  max-height: 76vh;
  position: relative;
  overflow: hidden;
  display: none;
  cursor: crosshair;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(0,210,255,0.05) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 100%, rgba(255,45,85,0.04) 0%, transparent 50%),
    var(--panel);
  border: 1px solid var(--border);
  border-top: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  z-index: 1;
}
#game-area.active { display: block; }

/* Corner bracket decorations */
#game-area::before, #game-area::after {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  z-index: 2;
  pointer-events: none;
}
#game-area::before { top: 8px; left: 8px; border-top: 2px solid rgba(0,210,255,0.6); border-left: 2px solid rgba(0,210,255,0.6); }
#game-area::after  { bottom: 8px; right: 8px; border-bottom: 2px solid rgba(0,210,255,0.6); border-right: 2px solid rgba(0,210,255,0.6); }

/* ── TARGET ── */
.game-target {
  position: absolute;
  border-radius: 50%;
  cursor: crosshair;
  background: radial-gradient(circle at 38% 38%, #a8e8ff 0%, var(--cyan) 45%, #0058a0 100%);
  box-shadow:
    0 0 0 2px rgba(0,210,255,0.7),
    0 0 0 5px rgba(0,210,255,0.15),
    0 0 20px rgba(0,210,255,0.45),
    inset 0 0 8px rgba(0,210,255,0.3);
  animation: targetPulse 0.95s ease-in-out infinite;
  z-index: 2;
}
.game-target::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  transform: translate(-50%, -50%);
}
@keyframes targetPulse {
  0%,100% { box-shadow: 0 0 0 2px rgba(0,210,255,0.7), 0 0 0 5px rgba(0,210,255,0.15), 0 0 18px rgba(0,210,255,0.4); }
  50%      { box-shadow: 0 0 0 2px rgba(0,210,255,1),   0 0 0 8px rgba(0,210,255,0.2), 0 0 32px rgba(0,210,255,0.65); }
}

/* 2x target state */
.game-target.x2-active {
  background: radial-gradient(circle at 38% 38%, #ffe082, var(--gold) 45%, #b04000 100%);
  animation: targetPulseGold 0.6s ease-in-out infinite;
}
.game-target.x2-active::after {
  content: '2×';
  position: absolute;
  top: -22px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-hero);
  font-size: 0.72rem;
  font-weight: 900;
  color: var(--gold);
  letter-spacing: 0.04em;
  text-shadow: 0 0 8px var(--gold);
  white-space: nowrap;
}
@keyframes targetPulseGold {
  0%,100% { box-shadow: 0 0 0 2px var(--gold), 0 0 0 5px rgba(255,204,0,0.2), 0 0 22px rgba(255,204,0,0.5); }
  50%      { box-shadow: 0 0 0 3px var(--gold), 0 0 0 10px rgba(255,204,0,0.25), 0 0 40px rgba(255,204,0,0.8); }
}

/* ── RIPPLE / POP EFFECTS ── */
.ripple {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0);
  animation: rippleOut 0.38s ease-out forwards;
}
@keyframes rippleOut {
  0%   { transform: translate(-50%,-50%) scale(0); opacity: 0.85; }
  100% { transform: translate(-50%,-50%) scale(1); opacity: 0; width: 70px !important; height: 70px !important; }
}

.pop {
  position: absolute;
  font-family: var(--font-hud);
  font-size: 0.82rem;
  font-weight: 700;
  pointer-events: none;
  transform: translateX(-50%);
  animation: popUp 0.58s cubic-bezier(0.22,1,0.36,1) forwards;
  letter-spacing: 0.04em;
}
@keyframes popUp {
  0%   { opacity: 1; transform: translateX(-50%) translateY(0) scale(1.2); }
  20%  { transform: translateX(-50%) translateY(-10px) scale(1); }
  100% { opacity: 0; transform: translateX(-50%) translateY(-50px) scale(0.85); }
}

/* ── RESET BUTTON ── */
#reset-btn {
  display: none;
  padding: 9px 28px;
  font-family: var(--font-hero);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  cursor: pointer;
  background: transparent;
  border: 1px solid rgba(255,45,85,0.28);
  color: rgba(255,45,85,0.5);
  clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
  transition: all 0.18s ease;
  margin: 8px 0;
  position: relative;
  z-index: 1;
}
#reset-btn:hover { background: rgba(255,45,85,0.1); border-color: var(--red); color: var(--red); box-shadow: 0 0 18px rgba(255,45,85,0.28); }

/* ── RESULTS SCREEN ── */
#results {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
  margin: 16px auto;
  padding: 32px 24px;
  width: min(520px, 92vw);
  animation: slideUp 0.48s cubic-bezier(0.22,1,0.36,1);
}
#results h2 {
  font-family: var(--font-hero);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--text-dim);
}
#grade {
  font-family: var(--font-hero);
  font-size: 6rem;
  font-weight: 900;
  line-height: 1;
}
#feedback {
  font-family: var(--font-hud);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* ── RESULTS GRID ── */
.res-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
  width: 100%;
}
.res-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom: 2px solid rgba(0,210,255,0.25);
  padding: 14px 10px;
  text-align: center;
  position: relative;
  transition: all 0.18s ease;
}
.res-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,210,255,0.35), transparent);
}
.res-box:hover { background: rgba(0,210,255,0.05); border-bottom-color: var(--cyan); }
.res-box .val { font-family: var(--font-hud); font-size: 1.55rem; color: var(--cyan); line-height: 1; display: block; }
.res-box .lbl { font-family: var(--font-hud); font-size: 0.55rem; letter-spacing: 0.15em; color: var(--text-dim); margin-top: 5px; text-transform: uppercase; display: block; }

/* ── RESULTS BUTTONS ── */
.res-btns { display: flex; gap: 10px; width: 100%; }
.res-btns button {
  flex: 1;
  padding: 14px 0;
  font-family: var(--font-hero);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  clip-path: polygon(10px 0%, 100% 0%, calc(100% - 10px) 100%, 0% 100%);
  transition: all 0.18s ease;
}
.res-btns button:hover { border-color: var(--border-h); color: var(--cyan); background: rgba(0,210,255,0.06); }
.res-btns button.pri { background: var(--gold); border-color: var(--gold); color: #0a0800; box-shadow: 0 0 22px rgba(255,204,0,0.4); }
.res-btns button.pri:hover { box-shadow: 0 0 42px rgba(255,204,0,0.7); transform: translateY(-1px); }

/* ── ANIMATIONS ── */
@keyframes slideDown { from{opacity:0;transform:translateY(-22px)} to{opacity:1;transform:translateY(0)} }
@keyframes slideUp   { from{opacity:0;transform:translateY(22px)}  to{opacity:1;transform:translateY(0)} }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  h1 { font-size: 2.5rem; margin: 26px 0 2px; }
  #menu-card { padding: 26px 18px 22px; }
  .stat-lbl { font-size: 0.52rem; }
  .stat-val { font-size: 1.05rem; }
  .res-grid { grid-template-columns: repeat(2, 1fr); }
  #grade { font-size: 4.5rem; }
}
@media (max-width: 480px) {
  h1 { font-size: 1.9rem; margin: 18px 0 2px; }
  .diff-row { flex-direction: column; }
  #stats-bar { flex-wrap: wrap; }
  .stat-cell { min-width: 45%; }
  .res-grid { grid-template-columns: repeat(2, 1fr); }
  #grade { font-size: 3.5rem; }
  .res-btns { flex-direction: column; }
}