/* 頁面：報名相關Q&A（theme/petfoodies/qa.php） */
.qa-container { max-width: 1000px; margin: 0 auto; }

/* ====== 搜尋區 ====== */
.qa-search {
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    text-align: center;
}
.qa-search h3 {
    font-family: var(--font-serif);
    color: var(--primary);
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: 1px;
    font-size: 1.25rem;
}
.qa-search h3 i { color: var(--accent); }
.search-box { max-width: 540px; margin: 0 auto; }
.search-box input {
    border-radius: 4px;
    border: 1px solid var(--border);
    padding: .65rem 1.25rem;
    font-size: 1rem;
    background: var(--bg-card);
    transition: border-color .2s, box-shadow .2s;
}
.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 .2rem rgba(30,74,94,.12);
    outline: none;
}

/* ====== 統計資訊條 ====== */
.qa-stats {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    color: var(--text);
    padding: 1rem 1.5rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
}
.qa-stats h4 {
    margin: 0;
    font-family: var(--font-serif);
    font-size: 1.05rem;
    color: var(--primary);
    font-weight: 600;
    letter-spacing: .5px;
}
.qa-stats h4 i { color: var(--accent); margin-right: .25rem; }

/* ====== 篩選 ====== */
.filter-buttons {
    text-align: center;
    margin-bottom: 1.75rem;
}
.filter-btn {
    background: var(--bg-card);
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: .4rem 1.25rem;
    margin: .2rem;
    border-radius: 4px;
    font-size: .9rem;
    font-weight: 500;
    letter-spacing: .5px;
    transition: background-color .15s, color .15s;
    cursor: pointer;
}
.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: #fff;
}

/* ====== QA 項目（手風琴） ====== */
.qa-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: border-color .15s, box-shadow .15s;
}
.qa-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}
.qa-question {
    background: var(--bg);
    padding: 1.1rem 3rem 1.1rem 1.5rem;
    font-weight: 600;
    color: var(--primary);
    margin: 0;
    font-size: 1rem;
    line-height: 1.6;
    letter-spacing: .5px;
    position: relative;
    cursor: pointer;
    transition: background-color .15s;
}
.qa-question:hover { background: var(--primary-light); }
.qa-question.active {
    background: var(--primary);
    color: #fff;
}
.qa-question::after {
    content: '+';
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.4rem;
    font-weight: 300;
    transition: transform .25s;
}
.qa-question.active::after {
    transform: translateY(-50%) rotate(45deg);
    color: var(--accent);
}
.qa-answer {
    padding: 0 1.5rem;
    background: var(--bg-card);
    margin: 0;
    line-height: 1.85;
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s, padding .3s;
}
.qa-answer.active {
    padding: 1.5rem;
    max-height: 1000px;
}
.qa-answer p {
    margin: 0;
    font-size: .98rem;
    color: var(--text);
}

/* ====== 浮動按鈕：回頂部 ====== */
.back-to-top {
    position: fixed;
    bottom: 7rem;
    right: 2rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 4px;
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s, visibility .2s, background-color .15s;
    cursor: pointer;
    z-index: 1000;
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-dark); }

/* ====== 浮動按鈕：我要發問 ====== */
.ask-question-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--accent);
    color: #fff;
    border: 1px solid var(--accent);
    border-radius: 4px;
    padding: .85rem 1.5rem;
    font-size: .95rem;
    font-weight: 600;
    letter-spacing: 1px;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    z-index: 1001;
    transition: background-color .15s;
    display: flex;
    align-items: center;
    gap: .5rem;
}
.ask-question-btn:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    color: #fff;
}
.ask-question-btn i { font-size: 1.1rem; }

/* ====== Modal 自訂樣式（去掉漸層、改新色） ====== */
.modal-header-success {
    background: var(--primary);
    color: #fff;
    border-bottom: 3px solid var(--accent);
}
.modal-header-success .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* 表單驗證樣式 */
.is-invalid { border-color: var(--danger); }
.invalid-feedback {
    display: block; width: 100%;
    margin-top: .25rem; font-size: .875em;
    color: var(--danger);
}

@media (max-width: 768px) {
    .qa-question { padding: 1rem 2.5rem 1rem 1.25rem; font-size: .95rem; }
    .qa-question::after { right: 1.2rem; }
    .qa-answer.active { padding: 1.25rem; }
    .qa-search { padding: 1.5rem 1rem; }
    .ask-question-btn { padding: .65rem 1.1rem; font-size: .88rem; }
}