:root {
    --bg-overlay: rgba(10, 10, 15, 0.75);
    --text-color: #f1f2f6;
    --sub-text: #a4b0be;
    --accent-color: #00d4ff;
    --card-bg: rgba(255, 255, 255, 0.08);
    --border-color: rgba(255, 255, 255, 0.2);
    --modal-bg: #111217;
}
[data-theme="light"] {
    --bg-overlay: rgba(255, 255, 255, 0.9);
    --text-color: #2f3542;
    --sub-text: #747d8c;
    --accent-color: #008cb3;
    --card-bg: rgba(0, 0, 0, 0.06);
    --border-color: rgba(0, 0, 0, 0.15);
    --modal-bg: #ffffff;
}
*{ margin:0; padding:0; box-sizing:border-box; font-family:'Segoe UI', system-ui, sans-serif; }

body {
    min-height:100vh; display:flex; flex-direction: column; justify-content:center; align-items:center;
    /* এক্সটার্নাল লিংকের বদলে এখন আপনার লোকাল ফোল্ডারের ইমেজ লোড হবে */
    background: url('../images/bg-space.jpg') center center/cover no-repeat fixed;
    position:relative; padding: 20px;
}
body::before{ content:''; position:absolute; inset:0; background: var(--bg-overlay); backdrop-filter: blur(6px); z-index: 0; }

.top-bar { position: relative; width: 100%; max-width: 1100px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 15px; z-index: 10; margin-bottom: 40px; }
.nav-links, .user-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.top-bar button, .top-bar select { background: var(--card-bg); border: 1px solid var(--border-color); color: var(--text-color); padding: 10px 16px; border-radius: 20px; cursor: pointer; backdrop-filter: blur(10px); font-size: 14px; outline: none; font-weight: 500; }
.top-bar button:hover { border-color: var(--accent-color); color: var(--accent-color); }
.btn-accent { background: var(--accent-color) !important; color: #000 !important; border: none !important; }

.container{ position:relative; z-index:1; width:100%; max-width:850px; text-align:center; }
.logo{ font-size: clamp(45px, 8vw, 75px); font-weight: 800; color: var(--text-color); margin-bottom: 5px; letter-spacing: 2px; }
.logo span{ color: var(--accent-color); }
.tagline{ color: var(--sub-text); font-size: clamp(14px, 4vw, 18px); margin-bottom: 35px; }

.search-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 25px; flex-wrap: wrap; }
.tab-btn { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 20px; color: var(--sub-text); font-size: 14px; cursor: pointer; padding: 8px 16px; }
.tab-btn.active { color: #000; background: var(--accent-color); border-color: var(--accent-color); font-weight: bold; }

.search-form-wrapper { display: flex; flex-direction: row; gap: 12px; width: 100%; }
.search-box-container { flex: 1; display: flex; align-items: center; background: var(--card-bg); border: 2px solid var(--border-color); border-radius: 60px; overflow: hidden; backdrop-filter: blur(15px); }
.search-box-container:focus-within { border-color: var(--accent-color); }
.search-box-container input{ flex: 1; border: none; outline: none; background: transparent; padding: 18px 25px; color: var(--text-color); font-size: 18px; width: 100%; }

.tool-btn { border: none; background: transparent; color: var(--sub-text); cursor: pointer; font-size: 20px; padding-right: 25px; transition: color 0.3s ease; }
.tool-btn.listening { color: #ff4757; animation: pulse 1.2s infinite; }
@keyframes pulse { 0% { transform: scale(1); } 50% { transform: scale(1.15); } 100% { transform: scale(1); } }

.main-search-btn { background: var(--accent-color); color: #111; border: none; border-radius: 60px; padding: 0 35px; font-size: 16px; font-weight: 600; cursor: pointer; box-shadow: 0 4px 15px rgba(0, 212, 255, 0.2); display: flex; align-items: center; gap: 8px; }

.trending-container { margin-top: 30px; color: var(--sub-text); font-size: 14px; }
.trending-tags { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.trend-tag { background: rgba(0, 214, 255, 0.1); border: 1px solid rgba(0, 214, 255, 0.3); color: var(--accent-color); padding: 6px 14px; border-radius: 20px; cursor: pointer; font-size: 13px; }
.trend-tag:hover { background: var(--accent-color); color: #000; }

.results-container { margin-top: 35px; text-align: left; background: var(--card-bg); border-radius: 20px; padding: 25px; backdrop-filter: blur(15px); border: 1px solid var(--border-color); display: none; max-height: 550px; overflow-y: auto; }
.result-item { margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--border-color); }
.result-item:last-child { border: none; }
.result-item h3 a { color: var(--accent-color); text-decoration: none; font-size: 19px; }
.result-item h3 a:hover { text-decoration: underline; }
.result-item p { color: var(--text-color); font-size: 15px; margin-top: 6px; line-height: 1.5; }
.result-meta { display: flex; gap: 10px; margin-top: 10px; font-size: 12px; color: var(--sub-text); flex-wrap: wrap; }
.result-meta span { background: rgba(255,255,255,0.08); padding: 3px 8px; border-radius: 4px; }

.search-actions-footer { margin-top: 25px; padding: 20px; border-top: 1px dashed var(--border-color); text-align: center; }
.search-actions-footer p { font-size: 14px; color: var(--sub-text); margin-bottom: 15px; }
.not-found-box { padding: 20px 10px; text-align: center; color: var(--text-color); }
.not-found-box i { font-size: 40px; color: #ff4757; margin-bottom: 15px; }
.not-found-box h4 { font-size: 18px; margin-bottom: 10px; color: #ff4757; }

.not-found-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.not-found-btn { padding: 10px 20px; border-radius: 25px; border: none; font-size: 14px; font-weight: 600; cursor: pointer; display: flex; align-items: center; gap: 8px; transition: transform 0.2s; }
.nf-add { background: #2ed573; color: white; }
.nf-req { background: rgba(255, 255, 255, 0.1); color: var(--text-color); border: 1px solid var(--border-color); }
.nf-req:hover { border-color: var(--accent-color); color: var(--accent-color); }

.entry-grid, .auth-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin-top: 15px; }
.full-width { grid-column: 1 / -1; }
input, textarea, select { width: 100%; padding: 12px; border-radius: 8px; border: 1px solid var(--border-color); background: var(--modal-bg); color: var(--text-color); outline: none; }

.custom-modal { display: none; position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 95%; max-width: 580px; background: var(--modal-bg); color: var(--text-color); padding: 25px; border-radius: 15px; box-shadow: 0 10px 40px rgba(0,0,0,0.6); z-index: 1000; border: 1px solid var(--border-color); }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; font-weight: bold; font-size: 18px; }
.close-modal { cursor: pointer; font-size: 24px; }
.modal-submit-btn { margin-top: 15px; padding: 12px; background: var(--accent-color); color: black; font-weight: bold; border: none; border-radius: 8px; cursor: pointer; width: 100%; }

.req-list-item { background: rgba(255,255,255,0.04); border: 1px solid var(--border-color); padding: 15px; border-radius: 8px; margin-bottom: 12px; display: flex; justify-content: space-between; align-items: center; text-align: left; }
.req-list-item-details { flex: 1; padding-right: 15px; }
.auth-toggle-text { font-size: 13px; color: var(--sub-text); text-align: center; margin-top: 15px; cursor: pointer; }
.auth-toggle-text span { color: var(--accent-color); font-weight: bold; }
.footer { margin-top: 60px; color: var(--sub-text); font-size: 14px; text-align: center;}

/* --- RESPONSIVE MEDIA QUERIES --- */
@media (max-width: 992px) { .container { max-width: 90%; } }
@media (max-width: 768px) {
    .top-bar { flex-direction: column; align-items: stretch; margin-bottom: 25px; }
    .nav-links, .user-actions { justify-content: center; }
    .search-tabs { gap: 5px; }
    .tab-btn { padding: 6px 12px; font-size: 13px; }
}
@media (max-width: 576px) {
    body { padding: 10px; }
    .logo { font-size: 42px; }
    .tagline { font-size: 13px; margin-bottom: 25px; }
    .search-form-wrapper { flex-direction: column; gap: 10px; }
    .search-box-container input { padding: 14px 18px; font-size: 16px; }
    .main-search-btn { width: 100%; padding: 14px; justify-content: center; border-radius: 30px; }
    .entry-grid, .auth-grid { grid-template-columns: 1fr; }
    .result-item h3 a { font-size: 17px; }
    .result-meta { flex-direction: column; gap: 5px; }
}