/* Meteor-Kommando — Einmaleins-Weltraum-Spiel
   Farbwelt: tiefes Weltall, Nebel-Lila, Laser-Türkis, Sternen-Gelb */

:root {
  --bg: #0b1026;
  --bg-2: #141b36;
  --panel: #1b2447;
  --panel-edge: #2a3566;
  --accent: #7b5fff;
  --accent-soft: #a98bff;
  --laser: #4ce0d2;
  --laser-shot: #ff1035;
  --laser-shot-core: #fff2f2;
  --warn: #ff6b6b;
  --star: #ffd166;
  --text: #f4f6fb;
  --text-dim: #9aa3c7;
  --font-display: "Orbitron", "Segoe UI", sans-serif;
  --font-body: "Rubik", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  padding: 0 16px;
  padding-block: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow: hidden;
  position: relative;
}

#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
}

#ambient-ships {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.ambient-ship {
  position: absolute;
  font-size: clamp(1.1rem, 4vw, 1.7rem);
  opacity: 0.5;
  filter: drop-shadow(0 0 8px rgba(123, 95, 255, 0.4));
}

#app {
  position: relative;
  z-index: 1;
  height: 100%;
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.screen {
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding-block: calc(16px + env(safe-area-inset-top, 0px)) calc(16px + env(safe-area-inset-bottom, 0px));
  animation: fade-in 0.35s ease;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Start screen ---------- */

#screen-start {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 28px;
}

.title-wrap h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 9vw, 2.9rem);
  line-height: 1.15;
  letter-spacing: 0.04em;
  margin: 0;
  color: var(--text);
  text-shadow: 0 0 18px rgba(123, 95, 255, 0.55), 0 0 2px var(--accent-soft);
}

.title-wrap h1 span {
  color: var(--laser);
  text-shadow: 0 0 18px rgba(76, 224, 210, 0.6);
}

.subtitle {
  margin: 10px 0 0;
  color: var(--text-dim);
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-ship {
  width: min(55vw, 220px);
  filter: drop-shadow(0 0 24px rgba(123, 95, 255, 0.45));
  animation: hover 3.2s ease-in-out infinite;
}

@keyframes hover {
  0%, 100% { transform: translateY(0px) rotate(-1deg); }
  50% { transform: translateY(-12px) rotate(1deg); }
}

.btn-primary {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: #0b1026;
  background: linear-gradient(135deg, var(--laser), var(--accent-soft));
  border: none;
  border-radius: 999px;
  padding: 16px 36px;
  cursor: pointer;
  box-shadow: 0 0 0 2px rgba(244, 246, 251, 0.08), 0 10px 30px rgba(76, 224, 210, 0.3);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary:active {
  transform: scale(0.96);
}

.btn-secondary {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 999px;
  padding: 12px 24px;
  cursor: pointer;
}

/* ---------- Top bar / HUD ---------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.topbar h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  margin: 0;
  flex: 1;
  text-align: center;
}

.icon-btn {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--panel-edge);
  background: var(--panel);
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hud-info {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-family: var(--font-display);
  font-variant-numeric: tabular-nums;
}

.hud-label {
  font-size: 0.85rem;
  color: var(--accent-soft);
  letter-spacing: 0.04em;
}

.hud-score,
.hud-streak {
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

/* ---------- Planet / level map ---------- */

#screen-map {
  overflow-y: auto;
}

.planet-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding-bottom: 8px;
}

.planet {
  position: relative;
  border: none;
  border-radius: 20px;
  padding: 18px 10px;
  background: radial-gradient(circle at 30% 25%, var(--panel-edge), var(--panel) 70%);
  color: var(--text);
  font-family: var(--font-display);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.planet .num {
  font-size: 1.7rem;
}

.planet .label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

.planet .stars {
  font-size: 0.8rem;
  color: var(--star);
  min-height: 1em;
}

.planet.locked {
  opacity: 0.45;
  cursor: not-allowed;
}

.planet.locked .num::after {
  content: "🔒";
  font-size: 0.9rem;
  margin-left: 6px;
}

.planet:not(.locked) {
  box-shadow: 0 0 0 2px rgba(123, 95, 255, 0.25), 0 8px 20px rgba(76, 224, 210, 0.12);
}

/* ---------- Game stage ---------- */

#screen-game {
  overflow: hidden;
}

#progress-track {
  height: 8px;
  border-radius: 999px;
  background: var(--panel);
  overflow: hidden;
  flex-shrink: 0;
}

#progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--laser));
  transition: width 0.3s ease;
}

.stage {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.asteroid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  animation: ship-hover 2.8s ease-in-out infinite;
}

.enemy-monster {
  font-size: clamp(3.6rem, 20vw, 5.8rem);
  line-height: 1;
  filter: drop-shadow(0 0 22px rgba(255, 16, 53, 0.45)) drop-shadow(0 0 10px rgba(123, 95, 255, 0.35));
}

@keyframes ship-hover {
  0%, 100% { transform: translateY(0) rotate(-3deg); }
  50% { transform: translateY(-14px) rotate(3deg); }
}

@keyframes fly-in {
  from { transform: translateX(130%) rotate(18deg) scale(0.8); opacity: 0; }
  to { transform: translateX(0) rotate(-3deg) scale(1); opacity: 1; }
}

.asteroid.enter {
  animation: fly-in 0.45s cubic-bezier(0.2, 0.7, 0.3, 1.1);
}

.asteroid.hit {
  animation: none;
  transition: transform 0.25s ease, opacity 0.25s ease;
  transform: scale(1.3);
  opacity: 0;
}

.asteroid.shake {
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-10px) rotate(-2deg); }
  40% { transform: translateX(10px) rotate(2deg); }
  60% { transform: translateX(-8px); }
  80% { transform: translateX(8px); }
}

.problem-tag {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 8vw, 2.1rem);
  font-variant-numeric: tabular-nums;
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  padding: 8px 22px;
  border-radius: 999px;
  box-shadow: 0 0 20px rgba(123, 95, 255, 0.25);
  text-shadow: 0 0 14px rgba(244, 246, 251, 0.3);
}

#boss-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: -6px;
}

#boss-sprite {
  font-size: clamp(2.6rem, 14vw, 4rem);
  animation: ship-hover 2.6s ease-in-out infinite, boss-pulse 1.3s ease-in-out infinite;
}

@keyframes boss-pulse {
  0%, 100% { filter: drop-shadow(0 0 18px rgba(255, 16, 53, 0.55)); }
  50% { filter: drop-shadow(0 0 34px rgba(255, 16, 53, 0.95)); }
}

#boss-sprite.shake {
  animation: shake 0.4s ease;
}

#boss-hp-track {
  width: min(70vw, 260px);
  height: 10px;
  border-radius: 999px;
  background: var(--panel);
  overflow: hidden;
  border: 1px solid var(--panel-edge);
}

#boss-hp-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--warn), var(--star));
  transition: width 0.3s ease;
}

.ship-sprite {
  font-size: clamp(3.4rem, 15vw, 4.6rem);
  filter: drop-shadow(0 0 16px rgba(76, 224, 210, 0.5));
  animation: ufo-patrol 4.5s ease-in-out infinite;
}

@keyframes ufo-patrol {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(-16px, -6px) rotate(-5deg); }
  50% { transform: translate(0, -10px) rotate(0deg); }
  75% { transform: translate(16px, -6px) rotate(5deg); }
}

.ship-sprite.shield {
  animation: shield-flash 0.45s ease;
}

@keyframes shield-flash {
  0% { filter: drop-shadow(0 0 0 rgba(255, 107, 107, 0)); }
  40% { filter: drop-shadow(0 0 26px rgba(255, 107, 107, 0.95)); }
  100% { filter: drop-shadow(0 0 16px rgba(76, 224, 210, 0.5)); }
}

.answers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  flex-shrink: 0;
}

.answer-btn {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-variant-numeric: tabular-nums;
  padding: 16px 8px;
  border-radius: 16px;
  border: 1px solid var(--panel-edge);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  transition: transform 0.12s ease, background 0.2s ease, border-color 0.2s ease;
}

.answer-btn:active {
  transform: scale(0.95);
}

.answer-btn.correct {
  background: rgba(76, 224, 210, 0.22);
  border-color: var(--laser);
  color: var(--laser);
}

.answer-btn.wrong {
  background: rgba(255, 107, 107, 0.22);
  border-color: var(--warn);
  color: var(--warn);
}

.answer-btn[disabled] {
  pointer-events: none;
}

/* ---------- Particle layer (lasers / explosions / confetti) ---------- */

#particles-layer {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  will-change: transform, opacity;
}

.laser-beam {
  position: absolute;
  width: 7px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--laser-shot-core) 0%, var(--laser-shot) 35%, rgba(255, 16, 53, 0) 100%);
  box-shadow: 0 0 12px 3px var(--laser-shot), 0 0 28px 8px rgba(255, 16, 53, 0.65);
  transform-origin: top center;
}

/* ---------- Victory screen ---------- */

#screen-victory {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 18px;
}

.victory-stars {
  font-size: 2.6rem;
  letter-spacing: 0.12em;
}

.victory-stars span {
  opacity: 0.25;
  transition: opacity 0.3s ease, transform 0.3s ease;
  display: inline-block;
}

.victory-stars span.earned {
  opacity: 1;
  color: var(--star);
  text-shadow: 0 0 16px rgba(255, 209, 102, 0.7);
}

#victory-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin: 0;
}

#victory-sub {
  color: var(--text-dim);
  margin: 0;
}

.victory-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---------- Utility ---------- */

[hidden] {
  display: none !important;
}

@media (max-width: 380px) {
  .planet .num { font-size: 1.4rem; }
  .btn-primary { padding: 14px 28px; }
}