/* =================================================================
   Forms & Article pages — Thiên Long: Sơn Hà Vạn Tượng
   Dùng chung design tokens từ styles.css (tông xanh lá rồng).
   ================================================================= */

/* ---------- Hiệu ứng hover cho nút ở các trang phụ (không áp cho index) ----------
   Vòng sáng tròn mờ nhẹ toả quanh nút khi rê chuột. */
.subpage .btn { position: relative; overflow: visible; }
.subpage .btn::after {
  content: ""; position: absolute; left: 50%; top: 50%;
  width: 80%; height: 80%; transform: translate(-60%, -60%) scale(.6);
  border-radius: 999px; pointer-events: none; z-index: -1;
  background: radial-gradient(circle, rgba(247,208,107,.45), transparent 70%);
  opacity: 0; transition: opacity var(--dur-base) var(--ease), transform var(--dur-base) var(--ease);
}
.subpage .btn:hover::after { opacity: 1; transform: translate(-50%, -50%) scale(1.35); }

/* ---------- Auth layout ---------- */
.auth {
  min-height: 100vh;
  min-height: 100dvh; /* dvh: tránh giật khi thanh địa chỉ mobile ẩn/hiện */
  display: grid; place-items: center;
  padding: 104px var(--gutter) var(--sp-9);
  position: relative; isolation: isolate;
}
.auth__bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(90% 70% at 75% 25%, rgba(30,158,87,.35), transparent 55%),
    radial-gradient(80% 70% at 20% 80%, rgba(11,94,51,.45), transparent 60%),
    linear-gradient(160deg, #0c2416 0%, var(--bg-base) 70%);
}
.auth__bg::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(80% 80% at 50% 45%, transparent 40%, rgba(4,14,9,.85) 100%);
}

/* ---------- Auth card ---------- */
.auth-card {
  width: 100%; max-width: 460px;
  background: linear-gradient(180deg, rgba(14,32,23,.92), rgba(7,19,13,.96));
  border: 1px solid var(--border-metal);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--sp-8) var(--sp-7);
}
.auth-card--wide { max-width: 560px; }

.auth-card__head { text-align: center; margin-bottom: var(--sp-7); }
.auth-card__logo { height: 64px; width: auto; margin: 0 auto var(--sp-4); }
.auth-card__title { font-size: 1.5rem; font-weight: 800; color: var(--gold); letter-spacing: .02em; }
/* Tiêu đề đăng nhập: to hơn + sáng màu hơn */
.auth-card__title--lg { font-size: 1.9rem; color: var(--gold-bright); }
.auth-card__sub { color: var(--text-muted); font-size: .9rem; margin-top: var(--sp-2); }

/* ---------- Form fields ---------- */
.form-field { margin-bottom: var(--sp-5); }
.form-field__label {
  display: block; font-size: .85rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: var(--sp-2); letter-spacing: .02em;
}
.form-field__label .req { color: var(--jade); margin-left: 2px; }

.form-field__input {
  width: 100%; font-family: var(--font-body); font-size: 1rem;
  color: var(--text-primary); background: rgba(4,14,9,.6);
  border: 1px solid var(--border-metal); border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-4);
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.form-field__input::placeholder { color: rgba(143,179,156,.6); }
.form-field__input:focus {
  outline: none; border-color: var(--jade);
  box-shadow: 0 0 0 3px rgba(75,227,138,.18);
}
.form-field__hint { font-size: .76rem; color: var(--text-muted); margin-top: var(--sp-2); }

/* Ẩn/hiện mật khẩu: wrapper + nút con mắt (do form-enhance.js chèn) */
.pw-wrap { position: relative; }
.pw-wrap .form-field__input { padding-right: 44px; } /* chừa chỗ cho nút */
.pw-toggle {
  position: absolute; top: 50%; right: 8px; transform: translateY(-50%);
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; padding: 0;
  background: none; border: 0; cursor: pointer;
  color: var(--text-muted); line-height: 1; opacity: .85;
  transition: color var(--dur-fast), opacity var(--dur-fast);
}
.pw-toggle:hover { color: var(--gold); opacity: 1; }
.pw-toggle svg { display: block; }

/* Grid 2 cột cho form đăng ký rộng */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 var(--sp-5); }
.form-grid .form-field--full { grid-column: 1 / -1; }

/* ---------- Actions ---------- */
.auth-card .btn { width: 100%; justify-content: center; margin-top: var(--sp-3); }
.auth-card__foot {
  text-align: center; margin-top: var(--sp-6);
  font-size: .9rem; color: var(--text-muted);
}
.auth-card__foot a { color: var(--jade); font-weight: 700; }
.auth-card__foot a:hover { color: var(--gold-bright); }

.form-row-between {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--sp-3); margin-bottom: var(--sp-5); font-size: .85rem;
}
.form-check { display: inline-flex; align-items: center; gap: var(--sp-2); color: var(--text-muted); cursor: pointer; }
.form-check input { accent-color: var(--emerald); width: 16px; height: 16px; }
/* Dòng đồng ý điều khoản: giữ trên 1 hàng, không xuống dòng */
.form-check--agree { flex-wrap: nowrap; white-space: nowrap; font-size: .85rem; }
.form-check--agree input { flex-shrink: 0; }
.form-link { color: var(--jade); font-weight: 700; }
.form-link:hover { color: var(--gold-bright); }

/* ---------- Nạp Bạc: lưới chọn gói ---------- */
.topup-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-3); }
.topup-option { cursor: pointer; }
.topup-option input { position: absolute; opacity: 0; pointer-events: none; }
.topup-option__box {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: var(--sp-4) var(--sp-2); border-radius: var(--radius-md);
  border: 1px solid var(--border-metal); background: rgba(4,14,9,.5);
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast), background var(--dur-fast);
}
.topup-option__box b { color: var(--gold-bright); font-size: 1rem; }
.topup-option__box em { color: var(--text-muted); font-style: normal; font-size: .76rem; }
.topup-option:hover .topup-option__box { border-color: var(--jade); }
.topup-option input:checked + .topup-option__box {
  border-color: var(--jade); background: rgba(30,158,87,.14);
  box-shadow: 0 0 0 2px rgba(75,227,138,.3);
}
.topup-option input:checked + .topup-option__box b { color: var(--jade); }
@media (max-width: 560px) { .topup-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- Content page: sidebar + nội dung ---------- */
.content-page { padding: 104px 0 var(--sp-9); }
.content-layout { display: grid; grid-template-columns: 280px 1fr; gap: var(--sp-7); align-items: start; }

/* Sidebar panels (dùng chung cho content page) */
.content-sidebar { display: flex; flex-direction: column; gap: var(--sp-5); }
.side-panel {
  background: linear-gradient(180deg, rgba(14,32,23,.92), rgba(7,19,13,.96));
  border: 1px solid var(--border-metal); border-radius: var(--radius-md);
  overflow: hidden;
}
.side-panel--download { padding: var(--sp-5); text-align: center; }
.side-panel__brand { display: flex; flex-direction: column; align-items: center; gap: var(--sp-2); margin-bottom: var(--sp-4); }
.side-panel__brand img { height: 52px; width: auto; filter: drop-shadow(0 2px 8px rgba(0,0,0,.5)); }
.side-panel__brand span { font-size: .7rem; font-weight: 800; letter-spacing: .12em; color: var(--text-muted); }
.side-panel__cta { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-2); }
/* 3 nút riêng biệt: xếp dọc, mỗi nút 1 hàng */
.side-panel__cta--triple { grid-template-columns: 1fr; }
.side-panel__cta--triple .side-cta { padding: var(--sp-3) var(--sp-4); }
.side-cta {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-1);
  padding: var(--sp-3) var(--sp-2); border-radius: var(--radius-sm);
  font-weight: 800; font-size: .9rem; letter-spacing: .02em;
  border: 1px solid var(--border-metal); color: var(--text-primary);
  background: rgba(4,14,9,.5); transition: all var(--dur-fast);
}
.side-cta span { color: var(--jade); }
.side-cta:hover { border-color: var(--jade); color: var(--jade); }
.side-cta--primary { color: #04140A; background: linear-gradient(180deg, var(--gold-bright), var(--gold)); border-color: #fff3cf; }
.side-cta--primary span { color: #04140A; }
.side-cta--primary:hover { color: #04140A; transform: translateY(-1px); box-shadow: var(--glow-gold); }

.side-panel__head {
  background: linear-gradient(180deg, var(--emerald-deep), rgba(11,94,51,.6));
  color: var(--gold-bright); font-weight: 800; font-size: 1.1rem; letter-spacing: .03em;
  text-align: center; padding: var(--sp-4); border-bottom: 1px solid var(--border-metal);
}
.side-panel__menu { padding: var(--sp-3) var(--sp-5); }
.side-panel__menu li { border-bottom: 1px dashed rgba(44,90,62,.5); }
.side-panel__menu li:last-child { border-bottom: 0; }
.side-panel__menu a {
  display: block; padding: var(--sp-3) 0; color: var(--text-primary); font-weight: 700; font-size: .9rem; line-height: 1.4;
  transition: color var(--dur-fast), padding var(--dur-fast);
}
.side-panel__menu a::before { content: "› "; color: var(--jade); font-weight: 800; }
.side-panel__menu a:hover { color: var(--jade); padding-left: var(--sp-2); }

/* Cột nội dung */
.content-main {
  background: linear-gradient(180deg, rgba(14,32,23,.5), rgba(7,19,13,.5));
  border: 1px solid var(--border-metal); border-radius: var(--radius-md);
  padding: 0 var(--sp-7) var(--sp-7);
}
.content-main__head {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--sp-2) var(--sp-4); flex-wrap: wrap;
  margin: 0 calc(-1 * var(--sp-7)) var(--sp-6);
  padding: var(--sp-5) var(--sp-7);
  background: linear-gradient(180deg, var(--emerald-deep), rgba(11,94,51,.4));
  border-bottom: 1px solid var(--border-metal);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.content-main__cat { font-size: 1.3rem; font-weight: 800; color: var(--gold-bright); letter-spacing: .02em; }
.content-main__crumb { font-size: .82rem; color: var(--text-muted); }

/* ---------- Article body ---------- */
.article__head { margin-bottom: var(--sp-6); text-align: center; border-bottom: 1px dashed rgba(44,90,62,.5); padding-bottom: var(--sp-5); }
.article__meta { color: var(--text-muted); font-size: .85rem; margin-top: var(--sp-3); letter-spacing: .04em; }
.article__title { font-size: clamp(1.4rem, 2.6vw, 2rem); font-weight: 800; color: var(--gold); line-height: 1.25; }
.article__hero {
  margin: 0 0 var(--sp-6); aspect-ratio: 16/7;
  border-radius: var(--radius-lg); border: 1px solid var(--border-metal);
  background:
    radial-gradient(circle at 50% 40%, rgba(30,158,87,.3), transparent 60%),
    linear-gradient(160deg, #0e2417, var(--bg-base));
  display: grid; place-items: center;
}
.article__hero span { color: var(--text-muted); font-weight: 700; letter-spacing: .1em; }
.article__body { margin: 0; }
.article__body h2 { font-size: 1.4rem; color: var(--gold); margin: var(--sp-7) 0 var(--sp-4); }
.article__body p { color: var(--text-primary); opacity: .92; margin-bottom: var(--sp-4); line-height: 1.8; }
.article__body ul { margin: 0 0 var(--sp-4) var(--sp-5); list-style: disc; }
.article__body li { color: var(--text-primary); opacity: .92; margin-bottom: var(--sp-2); }
.article__back { display: inline-block; margin: var(--sp-2) 0 var(--sp-5); color: var(--jade); font-weight: 700; }
.article__back:hover { color: var(--gold-bright); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .content-layout { grid-template-columns: 1fr; }
  .content-sidebar { order: 2; }
  .content-main { order: 1; }
}
@media (max-width: 560px) {
  .form-grid { grid-template-columns: 1fr; }
  .auth-card { padding: var(--sp-7) var(--sp-5); }
  .content-main { padding: 0 var(--sp-5) var(--sp-5); }
  .content-main__head { margin-inline: calc(-1 * var(--sp-5)); padding-inline: var(--sp-5); }
}

/* ---------- Popup đăng ký (trang chủ, hiện khi vào trang) ---------- */
.reg-modal {
  position: fixed; inset: 0; z-index: var(--z-modal);
  display: flex; align-items: center; justify-content: center;
  padding: var(--gutter); overflow-y: auto;
  opacity: 0; visibility: hidden;
  transition: opacity var(--dur-base) var(--ease), visibility var(--dur-base);
}
.reg-modal.is-open { opacity: 1; visibility: visible; }
.reg-modal__backdrop { position: absolute; inset: 0; background: rgba(4,10,7,.78); }
.reg-modal__card {
  position: relative; margin: auto;
  transform: translateY(14px) scale(.97);
  transition: transform var(--dur-base) var(--ease);
}
.reg-modal.is-open .reg-modal__card { transform: none; }
.reg-modal__close {
  position: absolute; top: 10px; right: 14px;
  width: 36px; height: 36px; padding: 0;
  background: none; border: 0; cursor: pointer;
  font-size: 1.8rem; line-height: 1; color: var(--text-muted);
  transition: color var(--dur-fast);
}
.reg-modal__close:hover { color: var(--gold); }

/* ---------- Input báo lỗi (khi thông tin sai) ---------- */
.form-field__input.is-error,
.pw-wrap.is-error .form-field__input {
  border-color: #e11d1d;
  box-shadow: 0 0 0 3px rgba(225,29,29,.22);
}

/* ---------- Popup thông báo (dùng chung, do form-alert.js điều khiển) ---------- */
.alert-overlay {
  position: fixed; inset: 0; z-index: var(--z-modal);
  display: flex; align-items: center; justify-content: center;
  padding: var(--gutter);
  background: rgba(4,10,7,.72);
  opacity: 0; visibility: hidden;
  transition: opacity var(--dur-base) var(--ease), visibility var(--dur-base);
}
.alert-overlay.is-open { opacity: 1; visibility: visible; }

.alert-box {
  width: 100%; max-width: 380px; text-align: center;
  background: linear-gradient(180deg, var(--bg-surface), var(--bg-base));
  border: 1px solid var(--border-metal); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--sp-7) var(--sp-6) var(--sp-6);
  transform: translateY(12px) scale(.96);
  transition: transform var(--dur-base) var(--ease);
}
.alert-overlay.is-open .alert-box { transform: none; }

.alert-box__icon {
  width: 56px; height: 56px; margin: 0 auto var(--sp-4);
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%; font-size: 1.8rem; font-weight: 800;
}
/* Màu icon theo loại popup */
.alert-box--error .alert-box__icon { color: #e11d1d; border: 2px solid #e11d1d; background: rgba(225,29,29,.1); }
.alert-box--success .alert-box__icon { color: var(--jade); border: 2px solid var(--jade); background: rgba(75,227,138,.12); }
.alert-box__title { font-family: var(--font-heading); font-size: 1.35rem; color: var(--gold-bright); margin-bottom: var(--sp-2); }
.alert-box__msg { color: var(--text-primary); opacity: .9; font-size: .95rem; margin-bottom: var(--sp-4); }
.alert-box__extra { margin-bottom: var(--sp-6); }
.alert-box .btn { width: 100%; justify-content: center; }

/* Khối mã đăng ký trong popup thành công (bấm để sao chép) */
.reg-code {
  width: 100%;
  display: flex; flex-direction: column; align-items: center; gap: var(--sp-1);
  padding: var(--sp-4); margin-bottom: var(--sp-2);
  border: 1px dashed var(--jade); border-radius: var(--radius-md);
  background: rgba(75,227,138,.08); cursor: pointer;
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.reg-code:hover { background: rgba(75,227,138,.14); }
.reg-code__value {
  font-family: var(--font-body); font-weight: 800; font-size: 1.3rem;
  letter-spacing: .12em; color: var(--jade);
}
.reg-code__hint { font-size: .74rem; color: var(--text-muted); }
.reg-code.is-copied { border-color: var(--gold-bright); }
.reg-code.is-copied .reg-code__hint { color: var(--gold-bright); }
.reg-code__note { font-size: .78rem; color: var(--text-muted); }