/* Clinical Luminary tokens — adaptado pra plataforma de ensino */
:root {
  --teal: #1A999C;
  --teal-dark: #0f6b6e;
  --green: #10b981;
  --green-soft: #d1fae5;
  --bege: #f7f3ec;
  --bege-2: #efe9dd;
  --ink: #0f1f24;
  --muted: #6b7d83;
  --line: #e5dfd2;
  --card: #ffffff;
  --warn: #d97706;
  --r: 12px;
  --r-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(15,31,36,.06);
  --shadow: 0 6px 20px -6px rgba(26,153,156,.18), 0 2px 6px rgba(15,31,36,.06);
  --shadow-lg: 0 24px 48px -16px rgba(26,153,156,.25);
  --t: .25s cubic-bezier(.2,.6,.2,1);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Inter','SF Pro Text',system-ui,sans-serif;
  background:var(--bege);
  color:var(--ink);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(1200px 600px at 10% -10%, rgba(26,153,156,.08), transparent 60%),
    radial-gradient(900px 500px at 110% 10%, rgba(16,185,129,.07), transparent 60%);
  background-attachment:fixed;
  min-height:100vh;
}
h1,h2,h3,h4{font-family:'Fraunces','Georgia',serif;font-weight:500;letter-spacing:-.01em;margin:0}
h1{font-size:clamp(28px,4vw,44px);line-height:1.1}
h2{font-size:clamp(22px,2.6vw,30px);line-height:1.2}
h3{font-size:18px;line-height:1.3}
a{color:var(--teal);text-decoration:none}
a:hover{color:var(--teal-dark)}
.container{max-width:1100px;margin:0 auto;padding:24px}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 24px;background:rgba(247,243,236,.8);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;
}
.brand{font-family:'Fraunces',serif;font-size:22px;font-weight:600;color:var(--ink);display:flex;gap:10px;align-items:center}
.brand .dot{width:10px;height:10px;border-radius:999px;background:var(--teal);box-shadow:0 0 0 4px rgba(26,153,156,.18)}
.nav-links{display:flex;gap:18px;align-items:center}
.nav-links a{color:var(--muted);font-size:14px;font-weight:500}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:var(--r-pill);
  font-weight:600;font-size:14px;cursor:pointer;
  border:1px solid transparent;transition:transform var(--t), box-shadow var(--t), background var(--t);
}
.btn-primary{background:var(--teal);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{background:var(--teal-dark);transform:translateY(-1px);box-shadow:var(--shadow-lg)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}
.btn-success{background:var(--green);color:#fff}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:24px;box-shadow:var(--shadow-sm);transition:box-shadow var(--t), transform var(--t);
}
.card:hover{box-shadow:var(--shadow)}
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.tag{
  display:inline-block;padding:4px 10px;border-radius:var(--r-pill);
  background:var(--green-soft);color:var(--teal-dark);font-size:12px;font-weight:600;
}
.tag-amber{background:#fef3c7;color:var(--warn)}
.muted{color:var(--muted)}
.kbd{font-family:'JetBrains Mono',monospace;font-size:13px;background:var(--bege-2);padding:2px 6px;border-radius:6px}
.input,.textarea,.select{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r);
  background:#fff;font:inherit;color:var(--ink);transition:border-color var(--t), box-shadow var(--t);
}
.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 4px rgba(26,153,156,.12)}
.label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin-bottom:6px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.between{justify-content:space-between}

/* Cards de conteúdo */
.phrase-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:18px;display:flex;justify-content:space-between;gap:16px;align-items:flex-start;
  transition:transform var(--t), box-shadow var(--t), border-color var(--t);
}
.phrase-card:hover{border-color:var(--teal);transform:translateY(-2px);box-shadow:var(--shadow)}
.phrase-en{font-family:'Fraunces',serif;font-size:18px;color:var(--ink);margin:0 0 4px}
.phrase-pt{color:var(--muted);font-size:14px}
.speak-btn{
  width:38px;height:38px;border-radius:999px;border:1px solid var(--line);
  background:#fff;cursor:pointer;display:grid;place-items:center;flex-shrink:0;
  transition:all var(--t);
}
.speak-btn:hover{background:var(--teal);color:#fff;border-color:var(--teal)}
.speak-btn svg{width:18px;height:18px}

/* Estrutura pivot */
.pivot{
  background:linear-gradient(135deg, rgba(26,153,156,.06), rgba(16,185,129,.04));
  border:1px solid var(--line);border-radius:var(--r);padding:24px;margin-bottom:18px;
}
.pivot-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:12px}
.pivot-en{font-family:'Fraunces',serif;font-size:28px;color:var(--teal-dark)}
.pivot-pt{color:var(--muted);font-size:15px}

/* Verbo card */
.verb-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:20px;cursor:pointer;transition:all var(--t);position:relative;
}
.verb-card:hover{border-color:var(--teal);transform:translateY(-3px);box-shadow:var(--shadow)}
.verb-card.done{background:linear-gradient(135deg,#fff,var(--green-soft))}
.verb-card.done::after{content:'✓';position:absolute;top:12px;right:14px;color:var(--green);font-weight:700;font-size:18px}
.verb-en{font-family:'Fraunces',serif;font-size:24px;color:var(--ink);margin-bottom:2px}
.verb-pt{color:var(--muted);font-size:13px}
.verb-past{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--teal);margin-top:4px}

/* Progress bar */
.progress-bar{height:8px;background:var(--bege-2);border-radius:999px;overflow:hidden}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--teal),var(--green));border-radius:999px;transition:width .6s ease}

/* Streak */
.streak-badge{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;
  background:linear-gradient(135deg,#fef3c7,#fde68a);color:var(--warn);font-weight:700;font-size:14px;
}

/* Hero */
.hero{padding:60px 0 30px;text-align:center}
.hero h1{margin-bottom:18px}
.hero p{font-size:18px;color:var(--muted);max-width:640px;margin:0 auto}

/* Day grid */
.day-grid{display:grid;grid-template-columns:repeat(10,1fr);gap:6px;margin-top:14px}
.day-cell{aspect-ratio:1;border-radius:6px;background:var(--bege-2);display:grid;place-items:center;font-size:11px;font-weight:600;color:var(--muted)}
.day-cell.done{background:var(--teal);color:#fff}
.day-cell.today{outline:2px solid var(--teal);outline-offset:2px}

/* Auth pages */
.auth-wrap{min-height:80vh;display:grid;place-items:center;padding:24px}
.auth-card{max-width:420px;width:100%}

/* Mobile */
@media(max-width:640px){
  .nav{padding:14px 18px}
  .nav-links a{display:none}
  .nav-links a.btn{display:inline-flex}
  .container{padding:18px}
  .day-grid{grid-template-columns:repeat(7,1fr)}
}