/* ===== 全局 ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --space: #0a0e1a;
  --deep: #0d1b2a;
  --panel: #111827;
  --border: #1e3a5f;
  --cyan: #00e5ff;
  --purple: #a855f7;
  --yellow: #fbbf24;
  --green: #22c55e;
  --red: #ef4444;
  --orange: #f97316;
  --text: #e2e8f0;
  --muted: #64748b;
}
html, body { height: 100%; }
body {
  background: var(--space);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  overflow: hidden;
  height: 100vh;
}

/* ===== 星空背景 ===== */
#stars-canvas {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
}

/* ===== 屏幕管理 ===== */
.screen {
  position: fixed; inset: 0; z-index: 10;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .4s;
}
.screen.active { opacity: 1; pointer-events: all; }

/* ===== 通用卡片 ===== */
.card {
  background: linear-gradient(135deg, #0d1b2a 0%, #111827 100%);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px 40px;
  box-shadow: 0 0 60px rgba(0,229,255,.08), 0 0 120px rgba(168,85,247,.06);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-block; cursor: pointer; border: none; border-radius: 12px;
  padding: 14px 28px; font-size: 1rem; font-weight: 700;
  transition: transform .15s, box-shadow .15s, filter .15s;
  user-select: none;
}
.btn:hover  { transform: translateY(-2px); filter: brightness(1.15); }
.btn:active { transform: translateY(0);    filter: brightness(.9); }
.btn-cyan   { background: linear-gradient(135deg, #0891b2, #00e5ff); color: #000; box-shadow: 0 0 20px rgba(0,229,255,.35); }
.btn-purple { background: linear-gradient(135deg, #7c3aed, #a855f7); color: #fff; box-shadow: 0 0 20px rgba(168,85,247,.35); }
.btn-green  { background: linear-gradient(135deg, #15803d, #22c55e); color: #fff; box-shadow: 0 0 20px rgba(34,197,94,.35); }
.btn-yellow { background: linear-gradient(135deg, #b45309, #fbbf24); color: #000; box-shadow: 0 0 20px rgba(251,191,36,.35); }
.btn-red    { background: linear-gradient(135deg, #b91c1c, #ef4444); color: #fff; }
.btn-ghost  { background: transparent; border: 1px solid var(--border); color: var(--muted); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ===== TITLE SCREEN ===== */
#screen-title .card { text-align: center; max-width: 580px; width: 90vw; }
.title-ship { font-size: 5rem; animation: float 3s ease-in-out infinite; display: block; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-14px)} }
.title-h1 {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 900;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  margin: 12px 0 6px;
}
.title-sub { color: var(--muted); font-size: .95rem; margin-bottom: 28px; }
.title-badges { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 32px; }
.badge {
  background: rgba(255,255,255,.06); border: 1px solid var(--border);
  border-radius: 99px; padding: 5px 14px; font-size: .8rem; color: var(--muted);
}

/* ===== MAP SCREEN ===== */
#screen-map {
  align-items: flex-start;
  overflow-y: auto;
  padding: 40px 0;
}
#screen-map .inner {
  max-width: 760px; width: 92vw;
}
.map-header { text-align: center; margin-bottom: 28px; }
.map-header h2 { font-size: 1.6rem; font-weight: 800; color: var(--cyan); }
.map-header p  { color: var(--muted); font-size: .9rem; margin-top: 4px; }

.planets-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.planet-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 22px; cursor: pointer; transition: all .2s; position: relative; overflow: hidden;
}
.planet-card::before {
  content:''; position:absolute; inset:0;
  background: radial-gradient(circle at 50% 0%, rgba(0,229,255,.06), transparent 70%);
  opacity:0; transition: opacity .3s;
}
.planet-card:hover::before { opacity: 1; }
.planet-card:hover { border-color: var(--cyan); transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,229,255,.12); }
.planet-card.locked { opacity: .45; cursor: not-allowed; }
.planet-card.locked:hover { transform: none; border-color: var(--border); box-shadow: none; }
.planet-card.locked::before { display: none; }
.planet-card.done { border-color: var(--green); }
.planet-card.done::before { background: radial-gradient(circle at 50% 0%, rgba(34,197,94,.06), transparent 70%); opacity:1; }
.planet-icon { font-size: 2.8rem; margin-bottom: 10px; display: block; }
.planet-num  { font-size: .7rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.planet-name { font-size: 1rem; font-weight: 700; margin: 4px 0 8px; }
.planet-desc { font-size: .8rem; color: var(--muted); line-height: 1.5; }
.planet-status {
  position: absolute; top: 12px; right: 12px;
  font-size: .72rem; font-weight: 700; padding: 3px 10px; border-radius: 99px;
}
.status-locked { background: rgba(100,116,139,.2); color: var(--muted); }
.status-open   { background: rgba(0,229,255,.15); color: var(--cyan); }
.status-done   { background: rgba(34,197,94,.15); color: var(--green); }

/* Stars earned display */
.hud {
  display: flex; align-items: center; gap: 16px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 99px; padding: 8px 20px; margin-bottom: 20px;
  width: fit-content; margin-left: auto;
}
.hud-item { font-size: .85rem; display: flex; align-items: center; gap: 6px; }
.hud-item .val { font-weight: 700; color: var(--yellow); }

/* ===== LEVEL SCREEN ===== */
#screen-level {
  align-items: flex-start;
  overflow-y: auto;
  padding: 20px;
}
#screen-level .inner {
  max-width: 820px; width: 100%; margin: auto;
}
.level-header {
  display: flex; align-items: center; gap: 14px; margin-bottom: 24px;
}
.level-header .back-btn {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px;
  padding: 8px 14px; cursor: pointer; color: var(--muted); font-size: .85rem;
  transition: all .2s;
}
.level-header .back-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.level-header h2 { font-size: 1.4rem; font-weight: 800; }
.level-header .planet-emoji { font-size: 1.8rem; }

/* ===== DIFFICULTY SWITCHER ===== */
.difficulty-switcher {
  display: flex; gap: 8px; justify-content: center; align-items: center;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 6px; margin-bottom: 20px;
  width: fit-content; margin-left: auto; margin-right: auto;
}
.diff-btn {
  padding: 8px 16px; border-radius: 8px; cursor: pointer;
  font-size: .85rem; font-weight: 600; transition: all .2s;
  border: 1px solid transparent; user-select: none;
}
.diff-btn:hover { transform: translateY(-1px); }
.diff-btn.active { border-color: currentColor; }
.diff-btn.easy { color: var(--green); }
.diff-btn.easy.active { background: rgba(34,197,94,.15); }
.diff-btn.hard { color: var(--yellow); }
.diff-btn.hard.active { background: rgba(251,191,36,.15); }
.diff-btn.hell { color: var(--red); }
.diff-btn.hell.active {
  background: rgba(239,68,68,.15);
  border-color: var(--red);
  box-shadow: 0 0 20px rgba(239,68,68,.3);
}
.diff-btn.hell.locked { opacity: .4; cursor: not-allowed; }
.diff-btn.hell.locked::after { content: ' 🔒'; }

/* Story box */
.story-box {
  background: linear-gradient(135deg, #0d1b2a, #111827);
  border: 1px solid var(--border); border-radius: 16px;
  padding: 24px; margin-bottom: 20px;
}
.story-box p { line-height: 1.8; font-size: .95rem; }
.story-box .speaker {
  font-size: .75rem; color: var(--cyan); font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em; margin-bottom: 6px;
}
.chat-bubble {
  background: rgba(0,229,255,.06); border-left: 3px solid var(--cyan);
  border-radius: 0 12px 12px 0; padding: 12px 16px; margin: 12px 0;
  font-size: .9rem; line-height: 1.7;
}
.chat-bubble.robot { border-color: var(--purple); background: rgba(168,85,247,.06); }

/* Concept highlight */
.concept-box {
  background: rgba(251,191,36,.06); border: 1px solid rgba(251,191,36,.25);
  border-radius: 14px; padding: 18px 20px; margin: 16px 0;
}
.concept-box .concept-title {
  font-size: .75rem; color: var(--yellow); font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px;
}
.concept-box p { font-size: .9rem; line-height: 1.7; }

/* Code examples */
.code-example {
  background: #060d18; border: 1px solid var(--border); border-radius: 12px;
  padding: 20px; margin: 16px 0;
}
.code-example .code-title {
  font-size: .8rem; color: var(--cyan); font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em; margin-bottom: 10px;
}
.code-example pre {
  background: #000; border-radius: 8px; padding: 14px;
  overflow-x: auto; font-family: 'Cascadia Code', monospace;
  font-size: .82rem; line-height: 1.6; margin-bottom: 12px;
  color: var(--text);
}
.code-example .code-explain {
  font-size: .85rem; color: var(--muted); line-height: 1.7;
  padding: 12px 14px; background: rgba(0,229,255,.04);
  border-left: 3px solid var(--cyan); border-radius: 0 8px 8px 0;
}

/* Pitfalls box */
.pitfalls-box {
  background: rgba(239,68,68,.06); border: 1px solid rgba(239,68,68,.25);
  border-radius: 12px; padding: 18px 20px; margin: 16px 0;
}
.pitfalls-box .pitfall-title {
  font-size: .75rem; color: var(--red); font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em; margin-bottom: 10px;
}
.pitfalls-box ul {
  list-style: none; padding: 0;
}
.pitfalls-box li {
  padding: 8px 0; border-bottom: 1px solid rgba(239,68,68,.1);
  font-size: .85rem; line-height: 1.6;
}
.pitfalls-box li:last-child { border-bottom: none; }
.pitfalls-box li::before {
  content: '⚠️ '; margin-right: 6px;
}

/* Quiz */
.quiz-box {
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 24px; margin-top: 20px;
}
.quiz-box h3 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
.quiz-question { font-size: .95rem; line-height: 1.7; margin-bottom: 18px; color: var(--text); }
.quiz-options { display: flex; flex-direction: column; gap: 10px; }
.quiz-opt {
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px 18px; cursor: pointer; font-size: .9rem;
  transition: all .2s; display: flex; align-items: center; gap: 10px;
}
.quiz-opt:hover { border-color: var(--cyan); background: rgba(0,229,255,.06); }
.quiz-opt.correct { border-color: var(--green) !important; background: rgba(34,197,94,.1) !important; }
.quiz-opt.wrong   { border-color: var(--red)   !important; background: rgba(239,68,68,.1)  !important; }
.quiz-opt .opt-letter {
  width: 28px; height: 28px; border-radius: 8px; background: var(--border);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .8rem; flex-shrink: 0;
}
.quiz-feedback {
  margin-top: 16px; padding: 14px 16px; border-radius: 12px;
  font-size: .9rem; line-height: 1.6; display: none;
}
.quiz-feedback.show { display: block; }
.quiz-feedback.ok  { background: rgba(34,197,94,.1); border: 1px solid rgba(34,197,94,.3); color: var(--green); }
.quiz-feedback.err { background: rgba(239,68,68,.1);  border: 1px solid rgba(239,68,68,.3);  color: #fca5a5; }

/* Progress bar */
.progress-wrap { margin-top: 24px; }
.progress-label { display: flex; justify-content: space-between; font-size: .8rem; color: var(--muted); margin-bottom: 6px; }
.progress-bar { height: 6px; background: var(--border); border-radius: 99px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--cyan), var(--purple)); border-radius: 99px; transition: width .5s ease; }

/* Next btn */
.level-nav { display: flex; justify-content: flex-end; gap: 12px; margin-top: 24px; padding-bottom: 40px; }

/* ===== WIN SCREEN ===== */
#screen-win .card { text-align: center; max-width: 500px; width: 90vw; }
.win-emoji { font-size: 5rem; animation: spin 2s linear infinite; display: block; }
@keyframes spin { from{transform:rotate(0)} to{transform:rotate(360deg)} }
.win-title { font-size: 2rem; font-weight: 900; color: var(--yellow); margin: 16px 0 8px; }
.win-sub { color: var(--muted); margin-bottom: 24px; line-height: 1.6; }
.win-stars { font-size: 2.5rem; margin-bottom: 20px; }

/* Pipe animation */
.pipe-demo {
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
  background: #060d18; border-radius: 12px; padding: 16px; margin: 16px 0;
  font-size: .85rem;
}
.pipe-node {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 14px; text-align: center; min-width: 90px;
  transition: all .4s; position: relative;
}
.pipe-node.active { border-color: var(--cyan); box-shadow: 0 0 16px rgba(0,229,255,.3); color: var(--cyan); }
.pipe-node.done   { border-color: var(--green); color: var(--green); }
.pipe-arrow { color: var(--muted); font-size: 1.2rem; }
.pipe-node .node-icon { font-size: 1.4rem; display: block; margin-bottom: 4px; }
.pipe-node .node-label{ font-size: .72rem; }

/* ===== INTERACTIVE SECTIONS ===== */

/* Challenge Box */
.challenge-box, .debug-box, .sandbox-box {
  background: linear-gradient(135deg, rgba(0,229,255,.03), rgba(168,85,247,.03));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin: 20px 0;
}

.challenge-header, .debug-header, .sandbox-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.challenge-icon, .debug-icon, .sandbox-icon {
  font-size: 2rem;
}

.challenge-header h3, .debug-header h3, .sandbox-header h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan);
  margin: 0;
}

.challenge-task, .debug-scenario, .sandbox-description {
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 16px;
  padding: 12px;
  background: rgba(0,0,0,.2);
  border-left: 3px solid var(--cyan);
  border-radius: 6px;
}

/* Code Editor */
.code-editor-wrapper {
  margin: 16px 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.editor-toolbar {
  background: rgba(0,0,0,.3);
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.code-editor {
  width: 100%;
  min-height: 200px;
  padding: 16px;
  background: #0a0e1a;
  color: var(--text);
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: .9rem;
  line-height: 1.6;
  border: none;
  resize: vertical;
  outline: none;
}

.code-editor.buggy-code {
  border-left: 3px solid var(--red);
}

.btn-small {
  padding: 6px 14px;
  font-size: .85rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  transition: all .2s;
}

.btn-small.btn-purple {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
  color: #fff;
}

.btn-small.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
}

.btn-small:hover {
  transform: translateY(-1px);
  filter: brightness(1.15);
}

/* Challenge Output */
.challenge-output, .error-log {
  margin: 16px 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.output-label, .error-label {
  background: rgba(0,0,0,.3);
  padding: 8px 14px;
  font-size: .85rem;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

.challenge-output pre, .error-log pre {
  padding: 14px;
  margin: 0;
  background: #0a0e1a;
  color: var(--text);
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: .85rem;
  line-height: 1.6;
  overflow-x: auto;
}

.error-log {
  border-color: var(--red);
}

.error-log .error-label {
  color: var(--red);
}

.error-log pre {
  color: var(--red);
}

/* Hints */
.challenge-hints, .debug-actions {
  margin: 16px 0;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.hints-content {
  width: 100%;
  margin-top: 12px;
}

.hint-item {
  background: rgba(251,191,36,.08);
  border-left: 3px solid var(--yellow);
  padding: 10px 14px;
  margin-bottom: 8px;
  border-radius: 6px;
  font-size: .9rem;
  color: var(--text);
  line-height: 1.6;
}

/* Feedback */
.challenge-feedback, .debug-feedback {
  margin-top: 16px;
  padding: 14px;
  border-radius: 10px;
  font-size: .95rem;
  line-height: 1.7;
  display: none;
}

.challenge-feedback.success, .debug-feedback.success {
  display: block;
  background: rgba(34,197,94,.1);
  border: 1px solid var(--green);
  color: var(--green);
}

.challenge-feedback.error, .debug-feedback.error {
  display: block;
  background: rgba(239,68,68,.1);
  border: 1px solid var(--red);
  color: var(--red);
}

/* Sandbox Controls */
.sandbox-controls {
  margin: 20px 0;
  padding: 20px;
  background: rgba(0,0,0,.2);
  border-radius: 12px;
}

.param-control {
  margin-bottom: 20px;
}

.param-control:last-child {
  margin-bottom: 0;
}

.param-control label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: .9rem;
}

.param-name {
  color: var(--text);
  font-weight: 600;
}

.param-value {
  color: var(--cyan);
  font-weight: 700;
  font-family: 'Consolas', monospace;
}

.param-control input[type="range"] {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255,255,255,.1);
  outline: none;
  -webkit-appearance: none;
}

.param-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--cyan);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0,229,255,.5);
}

.param-control input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--cyan);
  cursor: pointer;
  border: none;
  box-shadow: 0 0 10px rgba(0,229,255,.5);
}

.param-range {
  display: flex;
  justify-content: space-between;
  font-size: .75rem;
  color: var(--muted);
  margin-top: 4px;
}

/* Sandbox Visualization */
.sandbox-visualization {
  min-height: 300px;
  background: #0a0e1a;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.viz-placeholder {
  color: var(--muted);
  font-size: .95rem;
  text-align: center;
}

.sandbox-goal {
  background: rgba(251,191,36,.08);
  border-left: 3px solid var(--yellow);
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 6px;
  font-size: .9rem;
  line-height: 1.6;
}

.sandbox-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.sandbox-result {
  margin-top: 16px;
  padding: 14px;
  border-radius: 10px;
  font-size: .95rem;
  line-height: 1.7;
  display: none;
}

.sandbox-result.show {
  display: block;
  background: rgba(0,229,255,.08);
  border: 1px solid var(--cyan);
}

/* Responsive */
@media(max-width:600px){
  .card { padding: 24px 20px; }
  .planets-grid { grid-template-columns: 1fr 1fr; }
  .difficulty-switcher { width: 100%; }
}

/* ===== MILESTONE ===== */
.milestone-box {
  background: linear-gradient(135deg, rgba(251,191,36,.1), rgba(0,229,255,.1));
  border: 2px solid var(--yellow);
  border-radius: 20px;
  padding: 40px;
  margin: 30px 0;
  box-shadow: 0 0 40px rgba(251,191,36,.2);
}

.milestone-header {
  text-align: center;
  margin-bottom: 30px;
}

.milestone-icon {
  font-size: 5rem;
  animation: bounce 2s ease-in-out infinite;
  display: block;
  margin-bottom: 16px;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.milestone-title {
  font-size: 2rem;
  font-weight: 900;
  background: linear-gradient(90deg, var(--yellow), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.milestone-subtitle {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0;
}

.milestone-message {
  background: rgba(0,0,0,.3);
  border-left: 4px solid var(--yellow);
  padding: 16px 20px;
  border-radius: 10px;
  margin-bottom: 30px;
  line-height: 1.8;
  font-size: .95rem;
}

.milestone-section {
  margin: 30px 0;
}

.section-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 16px;
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.achievement-item {
  display: flex;
  gap: 12px;
  background: rgba(0,0,0,.2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  transition: all .3s;
}

.achievement-item:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,229,255,.15);
}

.achievement-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.achievement-content {
  flex: 1;
}

.achievement-title {
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.achievement-desc {
  font-size: .85rem;
  color: var(--muted);
  line-height: 1.6;
}

.skills-container {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.skill-badge {
  background: linear-gradient(135deg, rgba(0,229,255,.2), rgba(168,85,247,.2));
  border: 1px solid var(--cyan);
  border-radius: 20px;
  padding: 8px 16px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--cyan);
}

.milestone-project {
  background: rgba(0,229,255,.05);
  border: 1px solid var(--cyan);
  border-radius: 16px;
  padding: 24px;
}

.project-card {
  background: rgba(0,0,0,.2);
  border-radius: 12px;
  padding: 20px;
}

.project-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.project-icon {
  font-size: 2rem;
}

.project-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--cyan);
}

.project-desc {
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 16px;
}

.project-requirements,
.project-hints {
  margin-top: 16px;
  padding: 12px;
  background: rgba(0,0,0,.2);
  border-radius: 8px;
  font-size: .9rem;
}

.project-requirements ul,
.project-hints ul {
  margin: 8px 0 0 20px;
  padding: 0;
}

.project-requirements li,
.project-hints li {
  margin: 6px 0;
  line-height: 1.6;
}

.next-steps-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.next-step-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: rgba(0,0,0,.2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}

.step-number {
  background: var(--cyan);
  color: #000;
  font-weight: 700;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: .9rem;
}

.step-content {
  flex: 1;
  line-height: 1.7;
  padding-top: 2px;
}

.milestone-footer {
  text-align: center;
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
}

/* ===== ACHIEVEMENTS ===== */
.achievement-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: linear-gradient(135deg, rgba(251,191,36,.95), rgba(0,229,255,.95));
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,.4);
  z-index: 10000;
  transform: translateX(400px);
  opacity: 0;
  transition: all .3s ease-out;
  max-width: 350px;
}

.achievement-notification.show {
  transform: translateX(0);
  opacity: 1;
}

.achievement-notification-content {
  display: flex;
  gap: 16px;
  align-items: center;
}

.achievement-notification-icon {
  font-size: 3rem;
  flex-shrink: 0;
  animation: bounce 1s ease-in-out infinite;
}

.achievement-notification-text {
  flex: 1;
}

.achievement-notification-title {
  font-size: .85rem;
  font-weight: 700;
  color: rgba(0,0,0,.7);
  margin-bottom: 4px;
}

.achievement-notification-name {
  font-size: 1.2rem;
  font-weight: 900;
  color: #000;
  margin-bottom: 4px;
}

.achievement-notification-desc {
  font-size: .85rem;
  color: rgba(0,0,0,.6);
  line-height: 1.4;
}


.achievements-panel {
  background: rgba(0,0,0,.2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 30px;
  width: 100%;
}

.achievements-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.achievements-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--yellow);
}

.achievements-progress {
  font-size: .9rem;
  color: var(--muted);
}

.achievements-grid {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 10px;
}

.achievements-grid::-webkit-scrollbar {
  height: 8px;
}

.achievements-grid::-webkit-scrollbar-track {
  background: rgba(0,0,0,.2);
  border-radius: 4px;
}

.achievements-grid::-webkit-scrollbar-thumb {
  background: var(--cyan);
  border-radius: 4px;
}

.achievement-card {
  background: rgba(0,0,0,.3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  transition: all .3s;
  min-width: 140px;
  flex-shrink: 0;
}
.achievement-card.unlocked {
  border-color: var(--yellow);
  background: rgba(251,191,36,.1);
}

.achievement-card.locked {
  opacity: 0.4;
  filter: grayscale(1);
}

.achievement-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,0,0,.2);
}

.achievement-card-icon {
  font-size: 2.5rem;
  margin-bottom: 8px;
  display: block;
}

.achievement-card-name {
  font-weight: 700;
  font-size: .9rem;
  color: var(--text);
  margin-bottom: 4px;
}

.achievement-card-desc {
  font-size: .75rem;
  color: var(--muted);
  line-height: 1.4;
}

.achievement-card-locked {
  font-size: .75rem;
  color: var(--muted);
  margin-top: 8px;
}