/* ==========================================
   VTB WELCOME MODAL - FULL RESPONSIVE CSS
   ========================================== */

#vtb-welcome {
  position: fixed;
  inset: 0;
  z-index: 2147483646;
  background: var(--bg, #111827) center / cover no-repeat;
  display: grid;
  place-items: center;
  padding: clamp(5px, 1vw, 5px);
  box-sizing: border-box;
  height: 100vh;
  height: 100svh;
  overflow-y: auto;
  transition: opacity 0.4s ease;
}

#vtb-welcome.closing {
  opacity: 0;
  pointer-events: none;
}

.vtb-welcome-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, var(--overlay, 0.55));
  backdrop-filter: blur(var(--bgblur, 8px));
  -webkit-backdrop-filter: blur(var(--bgblur, 8px));
}

.vtb-welcome-card {
  position: relative;
  z-index: 1;
  width: min(580px, calc(100vw - 24px));
  max-height: calc(100svh - 32px);
  overflow-y: auto;
  padding: clamp(5px, 1vw, 5px);
  text-align: center;
  color: #fff;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: rgba(12, 18, 30, 0.42);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: clamp(16px, 4vw, 24px);
  backdrop-filter: blur(var(--cardblur, 12px));
  -webkit-backdrop-filter: blur(var(--cardblur, 12px));
}

/* Logo co giãn linh hoạt */
.vtb-welcome-logo {
  display: block;
  width: clamp(400px, 15vw, var(--logo-desktop-w, 500px));
  height: auto;
  max-height: clamp(200px, 5vw, var(--logo-desktop-h, 350px));
  object-fit: contain;
  margin: 0 auto clamp(10px, 5vw, 10px);
  align: center;
}

/* Tiêu đề & Mô tả tự động chỉnh kích thước */
.vtb-welcome-card h1 {
  font-size: var(--title, clamp(20px, 5vw, 25px));
  line-height: 1.2;
  margin: 0 0 clamp(8px, 2vw, 16px);
}

.vtb-welcome-card p {
  font-size: var(--subtitle, clamp(14px, 2.5vw, 18px));
  line-height: 1.4;
  margin: 0 0 clamp(5px, 1vw, 5px);
  opacity: 0.9;
}

/* Chọn ngôn ngữ */
.vtb-welcome-language {
  display: flex;
  justify-content: center;
  gap: clamp(6px, 1.5vw, 10px);
  flex-wrap: wrap;
  margin: 0 auto clamp(14px, 3vw, 20px);
}

.vtb-welcome-language button {
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-radius: 999px;
  padding: clamp(5px, 1.2vw, 8px) clamp(10px, 2vw, 14px);
  min-width: clamp(38px, 8vw, 48px);
  font-size: clamp(12px, 1.8vw, 14px);
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.vtb-welcome-language button.active {
  background: #fff;
  color: #111827;
  border-color: #fff;
}

/* Nút bấm hành động (Sound On / Sound Off) */
.vtb-welcome-actions {
  display: var(--audio-actions-display, flex);
  justify-content: center;
  gap: clamp(8px, 2vw, 12px);
  flex-wrap: wrap;
}

.vtb-welcome-actions button {
  flex: 1 1 200px;
  min-width: min(100%, 200px);
  min-height: 48px;
  border: 0;
  border-radius: 999px;
  padding: 12px 20px;
  font-size: clamp(14px, 2vw, 16px);
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.vtb-welcome-actions button:active {
  transform: scale(0.98);
}

.sound-on {
  background: #fff;
  color: #111827;
}

.sound-off {
  background: rgba(255, 255, 255, 0.13);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25) !important;
}

body.vtb-welcome-open #vtb-language-switcher {
  display: none !important;
}

/* Điều chỉnh riêng cho màn hình nhỏ (Mobile portrait & xoay ngang ngắn) */
@media (max-width: 500px) {
  .vtb-welcome-actions {
    display: grid;
    grid-template-columns: 1fr;
  }
  
  .vtb-welcome-actions button {
    width: 100%;
    min-width: 0;
  }
}