/* ─── ÁREA DE MEMBROS: ESTUDOS ELIFE ──────────────────────── */

/* Índice */
[hidden] { display: none !important; }

.study-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 1100px; margin: 0 auto; }

.study-card {
  position: relative; display: flex; flex-direction: column; gap: 16px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px; color: var(--navy); text-decoration: none; overflow: hidden;
  transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
}
.study-card::before {
  content: ''; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--grad);
  transform: scaleX(0); transform-origin: left; transition: transform .35s ease;
}
.study-card:hover, .study-card:focus-visible { transform: translateY(-6px); box-shadow: 0 24px 48px -24px rgba(17,32,87,.28); border-color: transparent; }
.study-card:hover::before, .study-card:focus-visible::before { transform: scaleX(1); }

.study-card__top { display: flex; align-items: center; gap: 16px; }
.study-card__num {
  font-size: 44px; font-weight: 900; letter-spacing: -.05em; line-height: 1;
  background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.study-card__meta { display: flex; flex-direction: column; gap: 2px; font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--blue); }
.study-card__meta span + span { color: var(--muted); font-weight: 500; }
.study-card__title { font-size: 22px; font-weight: 800; line-height: 1.3; letter-spacing: -.01em; }
.study-card__lede { font-size: 15px; color: var(--muted); line-height: 1.7; flex: 1; }
.study-card__bottom { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; padding-top: 20px; border-top: 1px solid var(--border); }
.study-card__stat { font-size: 13px; color: var(--muted); line-height: 1.4; max-width: 60%; }
.study-card__stat strong { display: block; font-size: 26px; font-weight: 900; letter-spacing: -.03em; color: var(--navy); }
.study-card__cta { font-size: 15px; font-weight: 700; color: var(--blue); white-space: nowrap; }
.study-card__cta span { display: inline-block; transition: transform var(--trans); }
.study-card:hover .study-card__cta span { transform: translateX(6px); }

/* Estudo em destaque (mais recente) ocupa a largura toda, em fundo escuro */
.study-card--featured {
  grid-column: 1 / -1; padding: 48px; color: #fff; border: 0;
  background:
    radial-gradient(ellipse at 90% 10%, rgba(255,102,196,.30) 0%, transparent 50%),
    radial-gradient(ellipse at 0% 100%, rgba(81,112,255,.40) 0%, transparent 55%),
    linear-gradient(148deg, #08081C 0%, #0D1130 55%, #060E1A 100%);
}
.study-card--featured .study-card__num { font-size: 64px; }
.study-card--featured .study-card__meta span + span,
.study-card--featured .study-card__lede,
.study-card--featured .study-card__stat { color: rgba(255,255,255,.6); }
.study-card--featured .study-card__meta,
.study-card--featured .study-card__cta { color: #ff9ad8; }
.study-card--featured .study-card__title { font-size: clamp(24px, 3vw, 34px); max-width: 26ch; }
.study-card--featured .study-card__lede { max-width: 70ch; font-size: 16px; }
.study-card--featured .study-card__stat strong { color: #fff; font-size: 34px; }
.study-card--featured .study-card__bottom { border-color: rgba(255,255,255,.12); }

.studies-credit { max-width: 760px; margin: 56px auto 0; text-align: center; font-size: 14px; color: var(--muted); line-height: 1.7; }

/* Acesso (email → membro AIHub) */
.access { max-width: 1100px; margin: 0 auto 40px; }
.access__gate { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 44px 48px; box-shadow: 0 12px 32px rgba(20,20,50,.06); position: relative; overflow: hidden; }
.access__gate::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--grad); }
.access__tag { font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--blue); margin-bottom: 10px; }
.access__title { font-size: clamp(22px, 3vw, 30px); font-weight: 900; letter-spacing: -.02em; color: var(--navy); line-height: 1.2; margin-bottom: 10px; }
.access__title em, .access__choice-title em { font-style: italic; }
.access__text { font-size: 16px; color: var(--muted); line-height: 1.7; max-width: 62ch; margin-bottom: 24px; }
.access__row { display: flex; gap: 12px; max-width: 560px; }
.access__row .form-control { flex: 1; min-width: 0; }
.access__row .btn { flex-shrink: 0; }
.access__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 16px; }
.access__choices { display: grid; grid-template-columns: 1.15fr 1fr; gap: 20px; margin-top: 24px; }
.access__choice { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; padding: 28px; border-radius: 16px; background: var(--bg); border: 1px solid var(--border); }
.access__choice--join { background: var(--bg-alt); }
.access__choice-title { font-size: 19px; font-weight: 800; color: var(--navy); letter-spacing: -.01em; }
.access__choice-text { font-size: 15px; color: var(--muted); line-height: 1.6; margin-bottom: 8px; }
.access__choice .access__row { width: 100%; max-width: none; }
.access__choice--join .btn { margin-top: auto; }
.access__notice { width: 100%; margin-top: 4px; padding: 14px 16px; border-radius: 12px; background: #fff; border: 1px solid rgba(81,112,255,.25); font-size: 14px; color: var(--navy); line-height: 1.5; }
.access__notice p { margin-bottom: 6px; }
.access__back { font-size: 14px; margin-bottom: 18px; text-decoration: none; font-weight: 700; }
.access__pills { display: flex; flex-wrap: wrap; gap: 8px; }
.access__submit { margin-top: 12px; padding: 16px 28px; }
.access__error { font-size: 14px; color: #d6336c; margin-top: 12px; min-height: 1em; }
.access__error:empty { display: none; }
.access__legal { font-size: 13px; color: var(--stone); margin-top: 16px; }
.access__link { background: none; border: 0; padding: 0; font: inherit; color: var(--blue); text-decoration: underline; cursor: pointer; }
.access__granted { background: var(--bg-alt); border-radius: 14px; padding: 16px 24px; font-size: 15px; color: var(--navy); line-height: 1.6; }

/* Cartões bloqueados para quem ainda não tem acesso */
.study-grid.is-locked .study-card__cta::before { content: "🔒 "; }

/* Página de estudo: capa */
.read-progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 1000; pointer-events: none; }
.read-progress span { display: block; height: 100%; width: 0; background: var(--grad); }

.study-hero {
  padding: calc(var(--nav-h) + 56px) 0 64px; color: #fff; position: relative; overflow: hidden;
  background:
    radial-gradient(ellipse at 10% 60%, rgba(81,112,255,.38) 0%, transparent 50%),
    radial-gradient(ellipse at 88% 18%, rgba(255,102,196,.22) 0%, transparent 44%),
    linear-gradient(148deg, #08081C 0%, #0D1130 55%, #060E1A 100%);
}
.study-hero__back { display: inline-block; font-size: 14px; font-weight: 600; color: rgba(255,255,255,.6); text-decoration: none; margin-bottom: 36px; transition: color var(--trans); }
.study-hero__back:hover { color: #fff; }
.study-hero__meta { display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 20px; }
.study-hero__meta span:first-child { background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.study-hero__meta span + span { color: rgba(255,255,255,.55); }
.study-hero__title { font-size: clamp(32px, 5vw, 60px); font-weight: 900; letter-spacing: -.04em; line-height: 1.06; max-width: 20ch; margin-bottom: 24px; }
.study-hero__lede { font-size: 18px; color: rgba(255,255,255,.62); line-height: 1.7; max-width: 64ch; }
.study-hero__stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 48px; }
.study-hero__stat { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.10); border-radius: 16px; padding: 22px 24px; backdrop-filter: blur(6px); }
.study-hero__stat strong {
  display: block; font-size: clamp(26px, 3vw, 38px); font-weight: 900; letter-spacing: -.04em; line-height: 1.1; margin-bottom: 6px;
  background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.study-hero__stat span { font-size: 14px; color: rgba(255,255,255,.6); line-height: 1.5; }

/* Página de estudo: artigo */
.study-article { max-width: 720px; margin: 0 auto; }
.study-article > p:first-child { font-size: 20px; line-height: 1.75; color: var(--navy); }
.study-article p, .study-article li { font-size: 17px; color: var(--text); line-height: 1.85; }
.study-article p { margin-top: 18px; }
.study-article h3 { font-size: 24px; font-weight: 800; letter-spacing: -.02em; color: var(--navy); margin: 48px 0 4px; padding-left: 18px; border-left: 4px solid; border-image: var(--grad-v) 1; }
.study-article ul { margin: 20px 0 0; padding: 20px 24px 20px 44px; background: var(--bg-alt); border-radius: 14px; }
.study-article li + li { margin-top: 8px; }
.study-article figure { margin: 32px 0 0; }
.study-article figure img { width: 100%; height: auto; border: 1px solid var(--border); border-radius: 16px; background: #fff; }
.study-article figcaption { font-size: 14px; color: var(--muted); margin-top: 10px; text-align: center; }
.study-article .study__note, .study-article__source { font-size: 14px !important; color: var(--muted) !important; border-top: 1px solid var(--border); padding-top: 20px; margin-top: 40px !important; line-height: 1.7 !important; }
.study-article .study__note + .study-article__source { border-top: 0; padding-top: 0; margin-top: 12px !important; }

/* Preview do estudo (quem ainda não é membro) */
.study-hero__stat--locked { display: flex; flex-direction: column; justify-content: center; border-style: dashed; }
.study-hero__stat--locked strong { -webkit-text-fill-color: initial; background: none; font-size: 26px; }
.study-article__teaser {
  position: relative; max-height: 3.7em; overflow: hidden; user-select: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 100%); mask-image: linear-gradient(180deg, #000 0%, transparent 100%);
}
.study-outline { max-width: 720px; margin: 32px auto 0; padding: 24px 28px; border-radius: 16px; background: var(--bg-alt); }
.study-outline__title { font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--blue); margin-bottom: 12px; }
.study-outline ul { list-style: none; margin: 0; padding: 0; }
.study-outline li { position: relative; padding: 8px 0 8px 30px; font-size: 16px; font-weight: 700; color: var(--navy); line-height: 1.45; border-top: 1px solid var(--border); }
.study-outline li:first-child { border-top: 0; }
.study-outline li::before { content: "🔒"; position: absolute; left: 0; top: 8px; font-size: 14px; }
.study-preview-gate { padding: 40px 0 0; }
.study-preview-gate .access { max-width: 900px; }

/* Navegação entre estudos */
.study-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 900px; margin: 72px auto 0; }
.study-nav__card { display: flex; flex-direction: column; gap: 8px; padding: 24px 28px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); text-decoration: none; transition: transform var(--trans), box-shadow var(--trans); }
.study-nav__card:hover { transform: translateY(-4px); box-shadow: 0 18px 36px -20px rgba(17,32,87,.28); }
.study-nav__card--next { text-align: right; }
.study-nav__label { font-size: 12px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--blue); }
.study-nav__title { font-size: 16px; font-weight: 700; color: var(--navy); line-height: 1.4; }
.study-nav__all { text-align: center; margin-top: 40px; }

@media (max-width: 900px) {
  .study-hero__stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .access__gate { padding: 32px 24px; }
  .access__grid, .access__choices { grid-template-columns: 1fr; }
  .access__choice { padding: 22px 20px; }
  .study-grid, .study-nav { grid-template-columns: 1fr; }
  .study-card, .study-card--featured { padding: 28px 24px; }
  .study-card--featured .study-card__num { font-size: 48px; }
  .study-nav__card--next { text-align: left; }
  .study-article > p:first-child { font-size: 18px; }
  .study-article h3 { font-size: 21px; }
}
@media (max-width: 420px) {
  .access__row { flex-direction: column; }
  .study-hero__stats { grid-template-columns: 1fr; }
  .study-card__bottom { flex-direction: column; align-items: flex-start; }
  .study-card__stat { max-width: none; }
}