/* style.css - AppNelly CBT — rebuilt for clarity, accessibility & mobile feel */

/* Theme variables (dark default) */
:root{
  --bg: #000;
  --card: #0f1115;
  --muted: #9aa4b2;
  --text: #e6eef6;
  --accent: #4cc9f0;
  --accent-2: #7ef2a9;
  --danger: #ff6b6b;
  --success: #6ee7b7;
  --glass: rgba(255,255,255,0.03);
  --radius: 14px;
  --shadow: 0 8px 30px rgba(2,6,23,0.7);

  /* option colors */
  --option-bg: rgba(255,255,255,0.02);
  --option-text: var(--text);
  --option-border: rgba(255,255,255,0.03);
  --option-hover: rgba(76,201,240,0.06);

  --select-bg: rgba(255,255,255,0.02);
  --select-text: var(--text);
}

/* Light theme overrides */
:root.light {
  --bg: #f5f8fb;
  --card: #ffffff;
  --muted: #475a6b;
  --text: #05122c;
  --accent: #0072ff;

  --option-bg: #f6f9fb;
  --option-text: var(--text);
  --option-border: rgba(5,18,44,0.06);
  --option-hover: rgba(0,114,255,0.04);

  --select-bg: #ffffff;
  --select-text: var(--text);
}

/* base */
*{box-sizing:border-box;margin:0;padding:0}
html,body,#app{height:100%}
body{
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
  line-height: 1.35;
  transition: background 0.3s ease, color 0.3s ease;
}



/* root app layout */
.app-root{display:flex;flex-direction:column;min-height:100vh;align-items:center;}

/* topbar */
.topbar{
  width:100%;
  max-width:1100px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  padding:12px 18px;
}
.topbar-left{display:flex;align-items:center;gap:12px}
.app-logo{width:52px;height:52px;border-radius:12px;object-fit:cover;box-shadow:var(--shadow)}
.app-title .name{font-weight:700;font-size:18px}
.app-title .subtitle{font-size:12px;color:var(--muted)}

/* top icons */
.topbar-right{display:flex;gap:8px;align-items:center}
.top-icon{
  background:var(--glass);
  border:none;
  padding:8px;
  border-radius:12px;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--accent);
  width:44px;height:44px;
  font-size:18px;
  transition:transform .12s ease, box-shadow .12s;
}
.top-icon:hover{transform:translateY(-3px); box-shadow:0 6px 16px rgba(0,0,0,0.3)}
/* theme toggle (emoji) */
.theme-toggle{
  width:44px;height:44px;border-radius:12px;border:none;background:var(--glass);cursor:pointer;font-size:20px;
  display:inline-flex;align-items:center;justify-content:center;
}
.theme-toggle:hover{transform:translateY(-3px)}

/* container */
.container{width:80%;max-width:980px;margin:12px auto 24px}
@media (max-width:600px){.container{width:95%}}

/* cards */
.card{
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow);
  border:1px solid rgba(255,255,255,0.03);
}
.center-card{text-align:center;padding:26px}
.splash-icon{width:88px;height:88px;border-radius:16px;margin-bottom:8px}

/* headings */
h1{font-size:20px;margin:8px 0 6px}
.lead{color:var(--muted);font-size:14px;margin-bottom:14px}

/* level select */
.level-select{display:flex;flex-direction:column;gap:8px;align-items:center;margin-bottom:14px}
.level-select label{color:var(--muted)}
.level-select select{
  appearance:none;-webkit-appearance:none;
  background:var(--select-bg);
  color:var(--select-text);
  border:1px solid var(--option-border);
  padding:10px 12px;border-radius:12px;width:100%;max-width:420px;font-weight:600;cursor:pointer;
}
.level-select select:hover{border-color:var(--accent)}

/* controls */
.controls{display:flex;gap:10px;justify-content:center;margin-bottom:12px}
.primary-btn,.ghost-btn{
  padding:10px 14px;border-radius:12px;border:none;cursor:pointer;font-weight:600;min-width:120px;
}
.primary-btn{background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#031219;box-shadow:0 8px 30px rgba(76,201,240,0.12)}
.ghost-btn{background:transparent;border:1px solid rgba(255,255,255,0.05);color:var(--muted)}
.primary-btn:hover{transform:scale(1.03)}.ghost-btn:hover{color:var(--accent);border-color:var(--accent)}

/* quiz top */
.quiz-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.timer{font-weight:700;font-size:18px;background:var(--select-bg);padding:8px 12px;border-radius:10px;border:1px solid var(--option-border)}
.progress{color:var(--muted);font-size:13px;margin-left:10px;display:inline-block}
.score-mini{color:var(--muted)}

/* quiz content */
.quiz-content{min-height:220px;display:flex;align-items:center;justify-content:center}
.question-card{width:100%;display:flex;flex-direction:column;gap:12px}
.q-text{font-weight:700;font-size:18px}

/* options grid */
.options{display:grid;gap:10px;grid-template-columns:1fr 1fr}
@media (max-width:520px){.options{grid-template-columns:1fr}}

.option{
  background:var(--option-bg);
  color:var(--option-text);
  padding:12px;border-radius:12px;cursor:pointer;border:1px solid var(--option-border);
  display:flex;align-items:center;gap:12px;transition:transform .12s,background .12s,border-color .12s;
}
.option:hover{transform:translateY(-4px);background:var(--option-hover)}
.option .letter{width:42px;height:42px;border-radius:10px;display:inline-grid;place-items:center;background:rgba(255,255,255,0.02);color:var(--muted);font-weight:700}
.option .opt-text{color:var(--option-text)}
.option.correct{background:linear-gradient(90deg, rgba(110,231,183,0.12), rgba(110,231,183,0.06));border-color:rgba(110,231,183,0.3)}
.option.wrong{background:linear-gradient(90deg, rgba(255,107,107,0.06), rgba(255,107,107,0.03));border-color:rgba(255,107,107,0.18)}

/* ensure previous button visible */
.nav-btn{
  display:inline-flex;align-items:center;gap:8px;padding:10px;border-radius:10px;border:1px solid rgba(255,255,255,0.03);background:transparent;color:var(--text);cursor:pointer;
}
.nav-btn[disabled]{opacity:0.5;cursor:not-allowed}

/* all-screen */
.all-questions{display:flex;flex-direction:column;gap:14px;margin-top:12px}
.all-q{background:var(--option-bg);padding:12px;border-radius:10px;border:1px solid var(--option-border)}
.all-q h4{margin-bottom:8px;font-size:15px}
.all-options{display:grid;gap:10px;grid-template-columns:1fr 1fr}
@media (max-width:520px){.all-options{grid-template-columns:1fr}}

/* result */
.result-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:18px 0;font-size:15px}
.result-msg{padding:12px;border-radius:10px;background:var(--option-bg);color:var(--muted)}

/* footer */
.footer{width:100%;text-align:center;color:var(--muted);padding:18px 8px;font-size:12px}

/* install button */
.install-btn{position:fixed;bottom:20px;right:20px;background:linear-gradient(45deg,var(--accent),var(--accent-2));color:#031219;border:none;padding:12px 18px;border-radius:30px;box-shadow:0 8px 30px rgba(0,0,0,0.4);cursor:pointer;z-index:9999}
.install-btn.hidden{display:none}

/* small helpers */
.hidden{display:none!important}
.fade-in{animation:fadeIn .35s ease both}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.small{font-size:13px;color:var(--muted)}
:focus{outline:3px solid rgba(76,201,240,0.12);outline-offset:2px}

.card {
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.card.hidden {
  opacity: 0;
  transform: scale(0.98);
}