/* ╔════════════════════════════════════════════════════════════╗
   ║  Home / Tử Vi Page — AI Chat, Modals & Utilities           ║
   ╚════════════════════════════════════════════════════════════╝ */

/* ── Spinner ── */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ── Scrollbar (AI Modal + Chat) ── */
#aiModal .modal-content::-webkit-scrollbar {
    width: 8px;
}
#aiModal .modal-content::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}
#aiModal .modal-content::-webkit-scrollbar-thumb {
    background: var(--accent-blue);
    border-radius: 4px;
}

#aiChatMessages::-webkit-scrollbar {
    width: 6px;
}
#aiChatMessages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

/* ── Home Link Buttons ── */
.home-button-container {
    text-align: center;
    margin-bottom: 20px;
}

.btn-home-link {
    text-decoration: none;
    display: inline-block;
    width: auto;
    padding: 10px 20px;
}

.btn-gradient-blue {
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.btn-gradient-orange {
    background: linear-gradient(135deg, #ff9800, #f57c00);
    margin-left: 10px;
}

.btn-gradient-green {
    background: linear-gradient(135deg, #11998e, #38ef7d);
    margin-left: 10px;
}

/* ── Reverse Lookup Modal ── */
.reverse-modal-content {
    max-width: 900px;
}

.reverse-container {
    display: flex;
    gap: 20px;
}

.reverse-col {
    flex: 1;
}

.reverse-col h3 {
    color: var(--text-primary);
    margin-bottom: 10px;
}

.constraint-list {
    min-height: 100px;
    border: 1px solid var(--border-color);
    padding: 10px;
    border-radius: var(--radius);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    list-style: none;
}

.btn-search-dates {
    width: 100%;
    margin-top: 10px;
    background: var(--accent-green);
    color: #fff;
    border: none;
}

.btn-search-dates:hover {
    background-color: #43A047;
}

.search-results-box {
    height: 400px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    padding: 10px;
    border-radius: var(--radius);
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.search-results-placeholder {
    color: var(--text-muted);
    text-align: center;
    padding-top: 50px;
}

/* ── AI Master Modal ── */
.ai-modal-content {
    max-width: 700px;
    height: 85vh;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
    border-radius: 16px;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.ai-header {
    background: linear-gradient(135deg, #667eea, #764ba2);
    padding: 20px;
    color: #fff;
    position: relative;
}

.ai-close-btn {
    position: absolute;
    right: 15px;
    top: 15px;
    font-size: 28px;
    cursor: pointer;
    color: #fff;
}

.ai-header-flex {
    display: flex;
    align-items: center;
    gap: 15px;
}

.ai-avatar {
    font-size: 48px;
}

.ai-title {
    margin: 0;
    font-size: 22px;
}

.ai-subtitle {
    margin: 5px 0 0;
    opacity: 0.9;
    font-size: 13px;
}

.ai-quick-action {
    padding: 15px 20px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.ai-btn-full {
    width: 100%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    border: none;
    padding: 12px;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    font-size: 14px;
    transition: opacity .2s;
}
.ai-btn-full:hover {
    opacity: .9;
}

.ai-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: var(--bg-primary);
}

.ai-welcome-box {
    text-align: center;
    padding: 30px;
    color: var(--text-muted);
}

.ai-welcome-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.ai-welcome-hint {
    font-size: 13px;
}

.ai-input-area {
    padding: 15px 20px;
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 10px;
}

.ai-chat-input {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 25px;
    font-size: 14px;
    outline: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: var(--font-body);
}

.ai-chat-input::placeholder {
    color: var(--text-muted);
}

.ai-chat-input:focus {
    border-color: var(--accent-blue);
}

.ai-send-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    border: none;
    padding: 12px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: bold;
    transition: opacity .2s;
}
.ai-send-btn:hover {
    opacity: .9;
}

/* ── Reverse Lookup Form Controls ── */
.form-control {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    width: 100%;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-blue);
}

/* ── Responsive ── */
@media (max-width: 768px) {
    .reverse-container {
        flex-direction: column;
    }
    .ai-modal-content {
        height: 95vh;
    }
}