/* ==========================================================================
   🎪 品牌企劃活動大廳 - 科技極簡亮色系樣式表 (Light Mode Lobby Style)
   ========================================================================== */

* { 
    box-sizing: border-box; 
    margin: 0; 
    padding: 0; 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; 
}

body { 
    background: #f8fafc; /* 💡 亮色系：極簡高質感灰白背景 */
    color: #334155; /* 💡 深灰文字，確保絕佳的閱讀對比度，符合 WCAG AAA 規範 */
    padding-bottom: 0; 
    line-height: 1.5;
}

.lobby-container { 
    max-width: 1140px; 
    margin: 0 auto; 
    padding: 0 20px; 
}

/* 頁首與 Logo 樣式 */
.lobby-header { 
    background: #ffffff; /* 💡 純白亮色頁首 */
    padding: 15px 0; 
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03); 
    border-bottom: 3px solid #ff5722; /* 品牌橘色主線條 */
    position: sticky; 
    top: 0; 
    z-index: 100; 
}

.lobby-header .lobby-container { 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
}

.lobby-logo-link { 
    display: flex; 
    align-items: center; 
    gap: 12px; 
    text-decoration: none; 
    color: #0f172a; 
    font-size: 1.4rem; 
    font-weight: 800; 
    letter-spacing: 1px; 
}

.lobby-logo-img { 
    height: 40px; 
    width: auto; 
    object-fit: contain; 
}

.lobby-logo-text {
    margin-top: 5px;
    background: linear-gradient(45deg, #ff5722, #ff9800); 
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
}

@media (max-width: 768px) { 
    .lobby-logo-text { font-size: 18px; } 
}

.lobby-logo-svg {
    height: 36px;
    width: auto;
    color: #ff5722; 
    filter: drop-shadow(0 2px 4px rgba(255,87,34,0.15));
    display: inline-block;
    vertical-align: middle;
}

/* 主視覺區 */
.lobby-hero { 
    text-align: center; 
    padding: 60px 0 40px; 
    background: radial-gradient(circle at top, #f1f5f9 0%, #f8fafc 70%); /* 💡 亮色漸層層次感 */
}

.lobby-hero h1 { 
    font-size: 2.6rem; 
    color: #0f172a; 
    margin-bottom: 15px; 
    text-shadow: 0 2px 8px rgba(0,0,0,0.05); 
}

.lobby-hero p { 
    color: #64748b; 
    font-size: 1.1rem; 
}

/* 區塊標題 */
.lobby-section-title { 
    font-size: 1.5rem; 
    color: #0f172a; 
    margin: 50px 0 25px; 
    border-left: 5px solid #ff5722; 
    padding-left: 15px; 
    display: flex; 
    align-items: center; 
    gap: 10px; 
}

/* 卡片網格 */
.lobby-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); 
    gap: 25px; 
}

.lobby-card { 
    background: #ffffff; /* 💡 純白亮色活動卡片 */
    border-radius: 12px; 
    padding: 30px; 
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05); 
    position: relative; 
    border: 1px solid #e2e8f0; 
    display: flex; 
    flex-direction: column; 
    justify-content: space-between; 
    min-height: 220px; 
    transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s; 
}

.lobby-card:hover { 
    transform: translateY(-5px); 
    border-color: #ff5722; 
    box-shadow: 0 20px 25px -5px rgba(255, 87, 34, 0.1);
}

.lobby-card h3 { 
    color: #0f172a; 
    margin-bottom: 12px; 
    font-size: 1.3rem; 
    padding-right: 75px; 
}

.lobby-card p { 
    color: #64748b; 
    font-size: 0.95rem; 
    line-height: 1.6; 
    margin-bottom: 25px; 
    flex-grow: 1; 
}

/* 狀態標籤 */
.lobby-card-tag { 
    position: absolute; 
    top: 25px; 
    right: 25px; 
    font-size: 0.75rem; 
    padding: 4px 10px; 
    border-radius: 20px; 
    font-weight: bold; 
}

.tag-active { 
    background: #e8f5e9; 
    color: #2e7d32; 
    border: 1px solid #c8e6c9; 
}

.tag-expired { 
    background: #f1f5f9; 
    color: #64748b; 
    border: 1px solid #cbd5e1; 
}

/* 按鈕樣式 */
.lobby-btn { 
    display: block; 
    width: 100%; 
    text-align: center; 
    padding: 14px; 
    border-radius: 8px; 
    text-decoration: none; 
    font-weight: bold; 
    font-size: 1rem; 
    transition: background 0.2s, box-shadow 0.2s; 
}

.lobby-btn-primary { 
    background: #ff5722; 
    color: #fff; 
    box-shadow: 0 4px 12px rgba(255,87,34,0.2); 
}

.lobby-btn-primary:hover { 
    background: #f4511e; 
    box-shadow: 0 6px 16px rgba(255,87,34,0.4); 
}

.lobby-btn-expired { 
    background: #f8fafc; 
    color: #64748b; 
    border: 1px solid #e2e8f0; 
}

.lobby-btn-expired:hover { 
    background: #f1f5f9; 
    color: #0f172a; 
    border-color: #cbd5e1;
}

.lobby-card-expired { 
    background: #f8fafc; 
    border-color: #e2e8f0;
}

/* 💡 亮色系專屬：高細節 Footer */
.lobby-footer { 
    background: #0f172a; /* 💡 頁尾維持沉穩深色（標準國際設計常規，有利於錨定網頁視覺結尾） */
    color: #94a3b8; 
    padding: 60px 0 30px; 
    margin-top: 80px; 
    border-top: 1px solid #1e293b; 
    font-size: 0.9rem; 
}

.lobby-footer-cols { 
    display: grid; 
    grid-template-columns: 2fr 1fr 1fr; 
    gap: 40px; 
    margin-bottom: 40px; 
}

@media (max-width: 768px) { 
    .lobby-footer-cols { grid-template-columns: 1fr; gap: 30px; } 
}

.lobby-footer-title { 
    color: #ffffff; 
    font-size: 1.1rem; 
    font-weight: bold; 
    margin-bottom: 20px; 
}

.lobby-footer-about { 
    line-height: 1.7; 
    padding-right: 20px; 
}

.lobby-footer-links { 
    list-style: none; 
}

.lobby-footer-links li { 
    margin-bottom: 12px; 
}

.lobby-footer-links a { 
    color: #94a3b8; 
    text-decoration: none; 
    transition: color 0.2s; 
}

.lobby-footer-links a:hover { 
    color: #ff5722; 
}

.lobby-footer-bottom { 
    border-top: 1px solid #1e293b; 
    padding-top: 30px; 
    text-align: center; 
    color: #475569; 
}