/* ==========================================
   XA Digital OS - Giao diện App chuyên nghiệp
   Mobile-First, Tối giản & Hiện đại (Grab/MoMo)
   ========================================== */

/* --- Biến màu sắc và style chung --- */
:root {
  --xa-primary: #00b14f;
  --xa-primary-hover: #009a44;
  --xa-secondary: #0088cc;
  --xa-bg: #f5f5f7;
  --xa-white: #ffffff;
  --xa-text: #1a1a1a;
  --xa-text-light: #666666;
  --xa-border: #e0e0e0;
  --xa-radius: 20px;
  --xa-radius-sm: 14px;
  --xa-radius-xs: 10px;
  --xa-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

/* --- Reset cơ bản --- */
.xa-container * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--xa-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Container chính --- */
.xa-container {
  max-width: 500px;
  margin: 0 auto;
  padding: 16px;
  font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--xa-text);
  line-height: 1.5;
}

/* --- Header --- */
.xa-header {
  text-align: center;
  padding: 30px 0 20px;
}

.xa-app-title {
  font-size: 32px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--xa-primary), var(--xa-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}

.xa-subtitle {
  color: var(--xa-text-light);
  font-size: 15px;
  font-weight: 400;
}

/* --- Card UI --- */
.xa-card {
  background: var(--xa-white);
  border-radius: var(--xa-radius);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--xa-shadow);
  transition: transform 0.2s;
}

.xa-card:active {
  transform: scale(0.99);
}

/* --- Hành động nhanh --- */
.xa-quick-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.xa-action-card {
  background: var(--xa-white);
  border-radius: var(--xa-radius);
  padding: 24px 20px;
  text-align: center;
  text-decoration: none;
  color: var(--xa-text);
  box-shadow: var(--xa-shadow);
  transition: all 0.2s ease;
  display: block;
}

.xa-action-card:active {
  transform: translateY(2px);
  box-shadow: 0 1px 6px rgba(0,0,0,0.06);
}

.xa-action-primary {
  background: linear-gradient(135deg, var(--xa-primary), #00d464);
  color: var(--xa-white);
  box-shadow: 0 4px 12px rgba(0, 177, 79, 0.3);
}

.xa-action-primary:active {
  box-shadow: 0 2px 6px rgba(0, 177, 79, 0.2);
}

.xa-action-icon {
  font-size: 40px;
  display: block;
  margin-bottom: 12px;
}

.xa-action-label {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}

.xa-action-hint {
  font-size: 12px;
  opacity: 0.8;
}

/* --- Nút bấm --- */
.xa-btn {
  display: block;
  width: 100%;
  padding: 16px;
  border-radius: var(--xa-radius-sm);
  border: none;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  font-family: inherit;
}

.xa-btn-primary {
  background: var(--xa-primary);
  color: var(--xa-white);
  box-shadow: 0 4px 12px rgba(0, 177, 79, 0.3);
}

.xa-btn-primary:active {
  background: var(--xa-primary-hover);
  transform: scale(0.97);
}

/* --- Input & Form --- */
.xa-input, select, textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--xa-radius-sm);
  border: 1.5px solid var(--xa-border);
  font-size: 16px;
  font-family: inherit;
  background: #fafafa;
  margin-bottom: 14px;
  transition: border 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
  appearance: none;
}

.xa-input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--xa-primary);
  background: var(--xa-white);
  box-shadow: 0 0 0 3px rgba(0, 177, 79, 0.1);
}

/* --- Camera Box --- */
.xa-camera-box {
  border: 2px dashed var(--xa-border);
  border-radius: var(--xa-radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  margin-bottom: 16px;
  background: #fafafa;
  transition: all 0.2s;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.xa-camera-box:hover, .xa-camera-box:active {
  border-color: var(--xa-primary);
  background: #f0fff4;
}

#xa-placeholder {
  font-size: 16px;
  color: var(--xa-text-light);
}

.xa-thumb {
  width: 70px;
  height: 70px;
  object-fit: cover;
  border-radius: var(--xa-radius-xs);
  margin: 4px;
  border: 2px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

#xa-preview {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  margin-top: 10px;
}

/* --- Thông báo thành công --- */
.xa-success-msg {
  background: #d4edda;
  color: #155724;
  padding: 16px;
  border-radius: var(--xa-radius-sm);
  text-align: center;
  font-weight: 600;
  font-size: 16px;
  margin-top: 16px;
  animation: xaSlideUp 0.3s ease;
}

@keyframes xaSlideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Thành phần khác --- */
/* ... (copy toàn bộ phần còn lại từ câu trả lời trước của tôi, 
       nhưng bổ sung thêm icon, loading, empty state, và responsive) ... */