/* RESET & ZMIENNE */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
.canvas-container {
  position: relative; /* To sprawi, że przycisk będzie trzymał się obszaru gry */
}
:root {
  --body-bg: #0b120d;
  --panel-bg: rgba(21, 38, 25, 0.65);
  --accent: #19ff69;
  --accent-hover: #0bf550;
  --text-main: #eaffea;
  --text-muted: #a3dfb6;
  --border-glow: rgba(25, 255, 105, 0.2);
  --glow-shadow: 0 0 15px rgba(25, 255, 105, 0.3);
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: radial-gradient(circle at center, #132719 0%, var(--body-bg) 100%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: hidden;
  padding-bottom: 40px;
}

/* EFEKT NEONU */
.text-glow {
  color: var(--accent);
  text-shadow: 0 0 10px rgba(25, 255, 105, 0.6);
}

/* GÓRNY PASEK NAWIGACJI */
.game-header {
  width: 100%;
  max-width: 1200px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  margin-bottom: 20px;
}

.menu-btn {
  background: rgba(25, 255, 105, 0.08);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.menu-btn:hover {
  background: var(--accent);
  color: var(--body-bg);
  box-shadow: var(--glow-shadow);
}

.game-title {
  font-size: 1.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
}

/* UKŁAD ARCHITEKTONICZNY GRY */
.game-layout {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 30px;
  width: 100%;
  max-width: 1200px;
  padding: 0 20px;
}

/* KONTENER CANVAS (CENTRUM) */
.canvas-container {
  position: relative;
  box-shadow: 0 20px 50px rgba(0,0,0,0.8);
  border-radius: 16px;
  overflow: hidden;
}

canvas {
  display: block;
  border: 2px solid var(--border-glow);
  background-color: #000;
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  transition: border-color 0.3s;
}

.canvas-container:hover canvas {
  border-color: rgba(25, 255, 105, 0.5);
}

/* BOCZNE PANELE (STEROWANIE I RANKING) */
.panel-box {
  background: var(--panel-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glow);
  border-radius: 16px;
  padding: 24px;
  width: 280px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

.panel-box h3 {
  color: var(--accent);
  font-size: 1.2rem;
  margin-bottom: 15px;
  border-bottom: 1px solid rgba(25, 255, 105, 0.15);
  padding-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.panel-box p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

kbd {
  background: rgba(25, 255, 105, 0.15);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-weight: bold;
}

/* WYBÓR TRUDNOŚCI */
.difficulty-wrapper {
  margin-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#difficultySelect {
  background: #142418;
  border: 1px solid var(--border-glow);
  color: var(--text-main);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.95rem;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s;
}

#difficultySelect:focus {
  border-color: var(--accent);
}

/* RANKING (LISTA) */
.leaderboard-list {
  list-style: none;
}

.leaderboard-list li {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(25, 255, 105, 0.05);
  font-size: 0.95rem;
}

.leaderboard-list li:last-child {
  border-bottom: none;
}

.leaderboard-list li span:last-child {
  color: var(--accent);
  font-weight: bold;
}

/* FORMULARZ NICKU (NAKŁADKA NA CANVAS) */
#nameForm {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(11, 18, 13, 0.95);
  border: 2px solid var(--accent);
  box-shadow: var(--glow-shadow);
  padding: 30px;
  width: 85%;
  max-width: 320px;
  border-radius: 16px;
  text-align: center;
  z-index: 10;
  backdrop-filter: blur(5px);
}

#nameForm h3 {
  color: var(--accent);
  margin-bottom: 20px;
}

#nameForm input[type="text"] {
  width: 100%;
  background: #16261b;
  border: 1px solid var(--border-glow);
  color: #fff;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 1rem;
  outline: none;
  text-align: center;
}

#nameForm input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 8px rgba(25, 255, 105, 0.2);
}

/* PRZYCISKI STERUJĄCE (START / RESET) */
#startButton, #resetButton {
  background: var(--accent);
  color: var(--body-bg);
  font-weight: 700;
  font-size: 1rem;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
}

#startButton:hover, #resetButton:hover {
  background: var(--accent-hover);
  box-shadow: var(--glow-shadow);
}

#resetButton {
  position: absolute;
  top: 50%; /* Zmieniono z 55% na 50% dla idealnego środka */
  left: 50%;
  transform: translate(-50%, -50%); /* Ta linijka w połączeniu z rodzicem relative idealnie go wyśrodkuje */
  width: auto;
  display: none; 
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  border: 2px solid var(--body-bg);
}

/* WERSJA W ROGU */
#version {
  font-size: 0.85rem;
  color: var(--text-muted);
  position: fixed;
  right: 20px;
  bottom: 20px;
  opacity: 0.5;
}

/* INTERFEJS RESPONSIVNY (MEDIA QUERIES) */
@media screen and (max-width: 950px) {
  .game-layout {
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .panel-box {
    width: 100%;
    max-width: 400px;
  }
  
  .game-header {
    padding: 15px 20px;
  }
}

@media screen and (max-width: 450px) {
  canvas {
    border-radius: 0; /* Na bardzo małych ekranach pełna szerokość bez zaokrągleń wygląda lepiej */
  }
  
  .canvas-container {
    border-radius: 0;
    width: 100%;
  }

  .game-title {
    font-size: 1.4rem;
  }

  .menu-btn {
    padding: 8px 14px;
    font-size: 0.85rem;
  }
}