/* ========================================
   ปุ่มภาษา / ตั้งค่า + แผงตั้งค่า — ธีมห้องฉาย
   ปุ่มอยู่ในแถบหัวของหน้า (.ds-bar / .reader-topbar) ไม่ลอยมุมจอ — ไม่ทับเมนูบนของ thunder
   ======================================== */

.ds-tools { display: flex; align-items: center; gap: 8px; margin-left: auto; flex: none; }

.action-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  width: 44px; height: 44px; border-radius: 12px; cursor: pointer;
  background: rgba(var(--ui-tint), .07); border: 1px solid var(--ds-line2); color: var(--ui-ink2);
  font-family: inherit; transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.action-btn:hover { background: rgba(var(--ui-tint), .14); color: var(--ui-strong); }
.action-btn.active { background: var(--ds-gold-fill, var(--ds-gold)); border-color: var(--ds-gold); color: var(--ds-gold-ink); }
.action-btn svg { pointer-events: none; flex: none; }

/* ── ภาษา ── */
.lang-picker { position: relative; }
.lang-btn { width: auto; min-width: 44px; padding: 0 12px; }
.lang-btn-code { font-size: 14px; font-weight: 800; letter-spacing: .02em; }
.lang-menu {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: 60; min-width: 168px; padding: 6px;
  display: flex; flex-direction: column; gap: 2px;
  background: var(--ds-bg2); border: 1px solid var(--ds-line2); border-radius: 14px;
  box-shadow: 0 24px 50px -18px rgba(0, 0, 0, .9);
  opacity: 0; visibility: hidden; transform: translateY(-6px); transition: opacity .18s ease, transform .18s ease, visibility .18s;
}
.lang-menu.open { opacity: 1; visibility: visible; transform: none; }
.lang-item {
  display: flex; align-items: center; gap: 10px; width: 100%; min-height: 44px; padding: 0 12px;
  background: none; border: 0; border-radius: 10px; cursor: pointer;
  color: var(--ui-ink2); font-family: inherit; font-size: 15px; font-weight: 700; text-align: left;
  transition: background-color .15s ease, color .15s ease;
}
.lang-item:hover { background: rgba(var(--ui-tint), .08); color: var(--ui-strong); }
.lang-item.active { background: #fff; color: var(--ds-bg); }
.lang-flag { font-size: 18px; line-height: 1; }

/* ── แผงตั้งค่า (เลื่อนจากขวา) ── */
.settings-overlay { position: fixed; inset: 0; z-index: 9998; background: rgba(var(--ui-lpanel-rgb, 4, 7, 16), .6); backdrop-filter: blur(2px); opacity: 0; visibility: hidden; transition: opacity .25s ease, visibility .25s; }
.settings-overlay.show { opacity: 1; visibility: visible; }
.settings-panel {
  position: fixed; top: 0; right: 0; z-index: 9999; width: 320px; max-width: 88vw; height: 100%; overflow-y: auto;
  background: var(--ds-bg2); border-left: 1px solid var(--ds-line2); color: var(--ds-ink);
  box-shadow: -30px 0 60px -30px rgba(0, 0, 0, .9);
  transform: translateX(100%); visibility: hidden; transition: transform .3s cubic-bezier(.25, 1, .5, 1), visibility .3s;
}
.settings-panel.open { transform: none; visibility: visible; }
.settings-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 14px 14px 20px; border-bottom: 1px solid var(--ds-line); }
.settings-header h3 { font-size: 18px; font-weight: 800; color: var(--ui-strong); }
.settings-close {
  width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; cursor: pointer;
  background: rgba(var(--ui-tint), .07); border: 1px solid var(--ds-line2); color: var(--ui-ink2); font-size: 24px; line-height: 1;
}
.settings-close:hover { background: rgba(var(--ui-tint), .14); color: var(--ui-strong); }
.settings-section { padding: 18px 20px; border-bottom: 1px solid var(--ds-line); }
.settings-label { margin-bottom: 12px; font-size: 13px; font-weight: 800; letter-spacing: .04em; color: var(--ds-muted); }
.settings-row { display: flex; align-items: center; gap: 8px; }
.settings-row-center { justify-content: center; }
.settings-row select {
  flex: 1; min-height: 46px; padding: 0 38px 0 14px; border-radius: 12px; cursor: pointer;
  background-color: rgba(var(--ui-tint), .07); border: 1px solid var(--ds-line2); color: var(--ui-strong);
  font-family: 'Sarabun', sans-serif; font-size: 15px; font-weight: 700;
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23f5bf45' stroke-width='2.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center;
}
.settings-row select option { color: #111827; background: #fff; }
.font-size-btn {
  width: 46px; height: 46px; display: grid; place-items: center; flex: none; border-radius: 12px; cursor: pointer;
  background: rgba(var(--ui-tint), .07); border: 1px solid var(--ds-line2); color: var(--ui-strong); font-size: 20px; font-weight: 700; font-family: inherit;
  transition: background-color .15s ease;
}
.font-size-btn:hover { background: rgba(var(--ui-tint), .14); }
.font-size-reset { width: auto; padding: 0 14px; font-size: 14px; }
.font-size-display { min-width: 56px; text-align: center; font-size: 17px; font-weight: 800; color: var(--ds-gold); }
.theme-switch { display: flex; gap: 4px; padding: 4px; border-radius: 14px; background: rgba(var(--ui-tint), .06); border: 1px solid var(--ds-line); }
.theme-switch button {
  flex: 1; min-height: 44px; padding: 0 12px; border: 0; border-radius: 10px; cursor: pointer;
  background: transparent; color: var(--ds-muted); font-family: inherit; font-size: 15px; font-weight: 800;
  transition: background-color .15s ease, color .15s ease;
}
.theme-switch button:hover { color: var(--ui-strong); }
.theme-switch button.active { background: #fff; color: var(--ds-bg); }