/* Nexus eBooks: tokens e componentes compartilhados por todas as páginas */
:root{color-scheme:light;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0}
img{max-width:100%}
[hidden]{display:none!important}
:root{
  --teal:#00E0C6;        /* turquesa da logo: interação, preenchimentos */
  --teal-ink:#0A7F79;    /* turquesa legível como texto sobre branco */
  --petrol:#0B7D7A;
  --deep:#0A3D4A;
  --gold:#C9962C;        /* acento editorial do PDF original: marcadores "?" e barras */
  --bg:#FFFFFF;
  --soft:#F4F7F8;
  --tint:#E9F8F6;
  --line:#DCE6E8;
  --fg:#132A31;
  --muted:#56696F;
  --card:#FFFFFF;
  --warn:#B9502A;
  --warn-tint:#FBEEE8;
  --on-teal:#03302D;
  --nav-bg:#0A3D4A;
  --nav-bg2:#083340;
  --nav-fg:#E4F2F2;
  --nav-muted:#8FB4B8;
  --nav-line:rgba(228,242,242,.12);
  --nav-hover:rgba(228,242,242,.06);
  --nav-active:rgba(0,224,198,.13);
  --scrim:rgba(4,22,28,.5);
  --shadow:0 1px 2px rgba(10,61,74,.06),0 6px 18px rgba(10,61,74,.07);
  --shadow-lg:0 12px 40px rgba(10,61,74,.18);
  --display:'Archivo','Helvetica Neue',Arial,sans-serif;
  --read:'Literata',Georgia,'Times New Roman',serif;
  --ui:'Archivo',system-ui,-apple-system,'Segoe UI',sans-serif;
  --side-w:300px;
  --top-h:64px;
  --r:12px;
  --sa:#0A9E93;          /* etapa A: antecedentes */
  --sb:#2D6F96;          /* etapa B: comportamento */
  --sc:#B8862A;          /* etapa C: consequências */
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --teal:#22E5CD; --teal-ink:#45E2CF; --petrol:#2AA6A0; --deep:#0A3D4A; --gold:#E0B451;
    --bg:#0D1E23; --soft:#12282E; --tint:#0F3432; --line:#223B41; --fg:#E2ECEE; --muted:#97ABB0;
    --card:#132B31; --warn:#EE9270; --warn-tint:#3B231A; --on-teal:#03302D;
    --nav-bg:#081B21; --nav-bg2:#06161B; --nav-fg:#E2EEEF; --nav-muted:#86A6AA;
    --nav-line:rgba(226,238,239,.09); --nav-hover:rgba(226,238,239,.05); --nav-active:rgba(34,229,205,.12);
    --sa:#2EE0CB; --sb:#7DBADD; --sc:#E6BC5C;
    --scrim:rgba(0,0,0,.6);
    --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 18px rgba(0,0,0,.22);
    --shadow-lg:0 14px 44px rgba(0,0,0,.5);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --teal:#22E5CD; --teal-ink:#45E2CF; --petrol:#2AA6A0; --deep:#0A3D4A; --gold:#E0B451;
  --bg:#0D1E23; --soft:#12282E; --tint:#0F3432; --line:#223B41; --fg:#E2ECEE; --muted:#97ABB0;
  --card:#132B31; --warn:#EE9270; --warn-tint:#3B231A; --on-teal:#03302D;
  --nav-bg:#081B21; --nav-bg2:#06161B; --nav-fg:#E2EEEF; --nav-muted:#86A6AA;
  --nav-line:rgba(226,238,239,.09); --nav-hover:rgba(226,238,239,.05); --nav-active:rgba(34,229,205,.12);
  --sa:#2EE0CB; --sb:#7DBADD; --sc:#E6BC5C;
  --scrim:rgba(0,0,0,.6);
  --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 18px rgba(0,0,0,.22);
  --shadow-lg:0 14px 44px rgba(0,0,0,.5);
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--fg);font-family:var(--ui);font-size:15px;line-height:1.5;overflow-x:hidden}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit}
:focus-visible{outline:2px solid var(--teal);outline-offset:2px;border-radius:6px}
svg.i{width:20px;height:20px;flex:none;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.eyebrow{font-family:var(--display);font-weight:700;font-size:.72rem;letter-spacing:.32em;text-transform:uppercase;color:var(--teal-ink);margin:0}

.prog{display:grid;gap:6px;max-width:420px}
.prog-row{display:flex;justify-content:space-between;font-size:.82rem;color:var(--muted);font-variant-numeric:tabular-nums}
.bar{height:6px;background:var(--line);border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;width:0;background:var(--teal);border-radius:99px;transition:width .4s ease}
.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.btn{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 18px;border-radius:999px;font-weight:600;font-size:.95rem;text-decoration:none;transition:background .15s,border-color .15s,transform .15s}
.btn-p{background:var(--deep);color:#fff}
.btn-p:hover{background:var(--petrol)}
:root[data-theme="dark"] .btn-p{background:var(--teal);color:var(--on-teal)}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .btn-p{background:var(--teal);color:var(--on-teal)}}
.btn-s{border:1.5px solid var(--line);color:var(--fg)}
.btn-s:hover{border-color:var(--teal-ink)}
.avatar{width:38px;height:38px;border-radius:50%;background:var(--deep);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;flex:none}

.menu{position:absolute;right:0;top:calc(100% + 8px);width:290px;max-width:calc(100vw - 32px);background:var(--card);color:var(--fg);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-lg);padding:8px;z-index:70;text-align:left}
.menu-h{display:flex;gap:12px;align-items:center;padding:10px 10px 12px;border-bottom:1px solid var(--line);margin-bottom:6px}
.menu-h strong{display:block;font-size:.95rem}
.menu-h span{font-size:.8rem;color:var(--muted)}
.menu-note{font-size:.8rem;color:var(--muted);padding:6px 10px 10px;margin:0;line-height:1.45}
.mi{display:flex;align-items:center;gap:10px;width:100%;padding:10px;border-radius:10px;font-size:.9rem;text-decoration:none;color:var(--fg)}
.mi:hover{background:var(--soft)}
.mi[disabled]{opacity:.55;cursor:default}
.mi[disabled]:hover{background:none}
.mi .tag{margin-left:auto;font-size:.68rem;color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:2px 7px}
.seg{display:flex;gap:4px;padding:4px;margin:4px 10px 8px;background:var(--soft);border-radius:10px}
.seg button{flex:1;padding:7px 0;border-radius:7px;font-size:.8rem;color:var(--muted)}
.seg button[aria-pressed="true"]{background:var(--card);color:var(--fg);box-shadow:0 1px 3px rgba(0,0,0,.12);font-weight:600}
.mi.danger{color:var(--warn)}

@keyframes rise{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--deep);color:#fff;padding:10px 16px;border-radius:999px;font-size:.88rem;z-index:90;box-shadow:var(--shadow-lg);display:flex;gap:8px;align-items:center;animation:rise .2s ease;max-width:calc(100vw - 32px)}
.toast svg{color:var(--teal);width:18px;height:18px}
@media (max-width:719px){.toast{bottom:calc(80px + env(safe-area-inset-bottom,0px))}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
}