/* ========================================
   RESET & VARIABLES
   ======================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg:          #05090d;
  --bg-card:     #0f1319;
  --bg-card2:    #141a23;
  --bg-input:    #0b0f15;

  --green:       #00ff88;
  --green-soft:  rgba(0, 255, 136, 0.12);
  --blue:        #3b9eff;
  --blue-soft:   rgba(59, 158, 255, 0.12);
  --red:         #ff3b5c;
  --red-soft:    rgba(255, 59, 92, 0.12);

  --text:        #d0d7e2;
  --text-muted:  #5c6a7e;
  --border:      #1e2738;
  --border-light:#2a3548;

  --radius:    6px;
  --radius-lg: 10px;
  --shadow:    0 2px 8px rgba(0, 0, 0, 0.4);
  --ease:      all .2s ease;
}

/* ========================================
   BASE
   ======================================== */

body {
  color: var(--text);
  font-family:
    'SF Mono', 'Fira Code', 'Cascadia Code',
    'JetBrains Mono', 'Courier New', monospace;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;

  background:
    radial-gradient(circle at 50% 0%, rgba(0, 255, 150, 0.12), transparent 35%),
    linear-gradient(rgba(0, 255, 150, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 150, 0.035) 1px, transparent 1px),
    var(--bg);
  background-size:
    100% 100%,
    42px 42px,
    42px 42px,
    auto;
}

/* scanline overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background: repeating-linear-gradient(
    0deg,
    transparent, transparent 3px,
    rgba(0, 255, 136, 0.008) 3px,
    rgba(0, 255, 136, 0.008) 4px
  );
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 40px;
}

/* ========================================
   BADGE
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .8px;
  text-transform: uppercase;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
}

.badge-green {
  background: var(--green-soft);
  color: var(--green);
  border-color: rgba(0, 255, 136, 0.2);
}

.badge-red {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .8px;
  text-transform: uppercase;
  border: 1px solid var(--border);
  background: var(--red-soft);
  color: var(--red);
  border-color: rgba(255, 59, 92, 0.3);
}

/* ========================================
   CARD
   ======================================== */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

/* ========================================
   HEADER
   ======================================== */

header {
  text-align: center;
  margin-bottom: 20px;
  padding-bottom: 18px;
}

.sys-label {
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
  opacity: .7;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.logo {
  width: 72px;
  height: 72px;
  filter: drop-shadow(0 0 14px rgba(255, 59, 92, 0.3));
}

.logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

header h1 {
  font-size: clamp(22px, 4.5vw, 40px);
  font-weight: 800;
  color: var(--green);
  text-shadow: 0 0 30px rgba(0, 255, 136, 0.3);
  letter-spacing: 1px;
  line-height: 1.15;
}

.subtitle {
  font-size: clamp(16px, 2.8vw, 24px);
  color: var(--text);
  margin-top: 14px;
  letter-spacing: 2px;
  font-weight: 700;
  text-transform: uppercase;
}

.status-bar {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

/* ========================================
   TASK PANEL
   ======================================== */

.task-panel {
  border-left: 3px solid var(--green);
  margin-bottom: 16px;
}

.task-row {
  display: flex;
  gap: 24px;
  padding: 22px 26px;
  align-items: flex-start;
}

.task-text {
  flex: 1;
  min-width: 0;
}

.task-text h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--green);
  margin-bottom: 14px;
  letter-spacing: .5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.task-text h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 15px;
  background: var(--green);
  border-radius: 2px;
}

.task-desc {
  font-size: 19px;
  line-height: 1.65;
  color: var(--text);
  margin-bottom: 8px;
}

.task-text ol {
  padding-left: 24px;
  font-size: 19px;
  line-height: 1.8;
  color: var(--text);
}

.task-text ol strong {
  color: var(--green);
  font-weight: 600;
}

.task-text ol li {
  margin-bottom: 2px;
}

/* ========================================
   SIDE INPUT (inside task panel)
   ======================================== */

.side-input {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 180px;
  padding-top: 44px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  font-family: inherit;
  font-size: 18px;
  font-weight: 700;
  background: var(--bg-input);
  color: var(--green);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  outline: none;
  -moz-appearance: textfield;
  transition: var(--ease);
}

.form-control::-webkit-inner-spin-button,
.form-control::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.form-control:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px var(--green-soft), 0 0 20px rgba(0, 255, 136, 0.1);
}

.form-control::placeholder {
  color: var(--text-muted);
  opacity: .5;
  font-size: 13px;
}

.form-control:disabled {
  opacity: .35;
  cursor: not-allowed;
}

.btn {
  width: 100%;
  padding: 10px 20px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: 1px solid var(--green);
  border-radius: var(--radius);
  background: var(--green-soft);
  color: var(--green);
  cursor: pointer;
  transition: var(--ease);
}

.btn:hover {
  background: rgba(0, 255, 136, 0.2);
  box-shadow: 0 0 20px rgba(0, 255, 136, 0.15);
}

.btn:active {
  transform: scale(.97);
}

.btn:disabled {
  opacity: .35;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ========================================
   GRID
   ======================================== */

.grid-card {
  padding: 14px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(14, 1fr);
  gap: 5px;
}

.cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  font-size: clamp(12px, 1.5vw, 16px);
  font-weight: 700;
  color: var(--text);
  user-select: none;
  transition: var(--ease);
  aspect-ratio: 1 / 1;
}

/* border colors */
.cell.green-border { border-color: var(--green); }
.cell.blue-border  { border-color: var(--blue); }
.cell.red-border   { border-color: var(--red); }

/* marks */
.cell .mark {
  position: absolute;
  top: 2px;
  right: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cell .mark-circle {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
}

.cell .mark-square {
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--blue);
}

/* visual effects */
.cell.tilted { transform: rotate(var(--tilt-deg, 3deg)); }
.cell.dim    { opacity: .4; }

.cell:hover {
  background: var(--bg-card2);
  cursor: crosshair;
  border-color: var(--border-light);
}

/* ========================================
   RESULT
   ======================================== */

.result {
  padding: 16px 26px;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  font-size: 17px;
  line-height: 1.8;
  white-space: pre-line;
  display: none;
  text-align: left;
  border-top: 1px solid var(--border);
}

.result.success {
  display: block;
  background: var(--green-soft);
  border: 1px solid rgba(0, 255, 136, 0.25);
  color: var(--green);
}

.result.failure {
  display: block;
  background: var(--red-soft);
  border: 1px solid rgba(255, 59, 92, 0.25);
  color: var(--red);
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 768px) {
  .grid {
    grid-template-columns: repeat(10, 1fr);
  }

  .container {
    padding: 16px 12px 32px;
  }

  .task-row {
    flex-direction: column;
  }

  .side-input {
    flex-direction: row;
    flex-wrap: wrap;
    min-width: 0;
    padding-top: 0;
    align-items: stretch;
  }

  .form-control,
  .btn {
    flex: 1;
    min-width: 0;
    width: auto;
  }
}