/*
Theme Name: BioInfoT Q&A
Theme URI: https://bioinformaticsindia.com
Author: Bioinformatics India
Author URI: https://bioinformaticsindia.com
Description: A Reddit-style Q&A community theme for bioinformatics professionals and students.
Version: 1.5.0
Requires at least: 6.0
Tested up to: 6.5
Requires PHP: 8.0
License: GPL v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: bioinfot
*/

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --color-primary:    #0066cc;
    --color-primary-dk: #004fa3;
    --color-primary-lt: #e8f1fb;
    --color-accent:     #e8440a;
    --color-accent-dk:  #c23508;
    --color-bg:         #f0f2f5;
    --color-card:       #ffffff;
    --color-border:     #e4e6eb;
    --color-text:       #1a1a2e;
    --color-muted:      #6c737a;
    --color-vote-up:    #e8440a;
    --color-vote-dn:    #6478ff;
    --color-accepted:   #2ecc71;
    --color-tag-bg:     #eef3fd;
    --color-tag-txt:    #0055bb;
    --radius:           10px;
    --radius-sm:        6px;
    --shadow:           0 2px 8px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md:        0 6px 20px rgba(0,0,0,.1), 0 2px 6px rgba(0,0,0,.06);
    --transition:       0.18s ease;
    --font-sans:        'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono:        "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

/* ── Layout ── */
.site-wrapper { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.content-area { display: grid; grid-template-columns: 1fr 312px; gap: 24px; padding: 20px 0; }
@media (max-width: 860px) { .content-area { grid-template-columns: 1fr; } .sidebar { display: none; } }

/* ── Header ── */
.site-header {
    background: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    position: sticky; top: 0; z-index: 100;
    box-shadow: 0 1px 4px rgba(0,0,0,.08);
}
.header-inner {
    display: flex; align-items: center; gap: 16px;
    height: 56px; max-width: 1200px; margin: 0 auto; padding: 0 20px;
}
.site-logo {
    display: flex; align-items: center; gap: 10px;
    font-weight: 800; font-size: 20px;
    color: var(--color-primary);
    letter-spacing: -.3px; flex-shrink: 0;
}
.site-logo svg { width: 34px; height: 34px; flex-shrink: 0; }
.site-logo:hover { text-decoration: none; color: var(--color-primary-dk); }

.header-nav { display: flex; align-items: center; gap: 2px; flex-shrink: 0; }
.header-nav a {
    padding: 6px 12px; border-radius: 20px;
    font-size: 13px; font-weight: 600; color: var(--color-muted);
    transition: background var(--transition), color var(--transition);
}
.header-nav a:hover { background: var(--color-bg); color: var(--color-text); text-decoration: none; }
.header-nav a.active { color: var(--color-primary); }

.header-search { flex: 1; max-width: 560px; position: relative; }
.header-search input {
    width: 100%; height: 38px; padding: 0 18px;
    border: 1.5px solid var(--color-border); border-radius: 24px;
    background: var(--color-bg); font-size: 14px; font-family: var(--font-sans);
    transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}
.header-search input:focus {
    outline: none; border-color: var(--color-primary);
    background: #fff; box-shadow: 0 0 0 3px rgba(0,102,204,.12);
}

.header-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }

.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 7px 18px; border-radius: 24px; font-size: 14px;
    font-weight: 600; cursor: pointer; border: 1.5px solid transparent;
    transition: background var(--transition), color var(--transition),
                box-shadow var(--transition), transform var(--transition);
    font-family: var(--font-sans); letter-spacing: .01em;
}
.btn:active { transform: scale(.97); }
.btn-outline { border-color: var(--color-primary); color: var(--color-primary); background: transparent; }
.btn-outline:hover { background: var(--color-primary-lt); text-decoration: none; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dk); text-decoration: none; box-shadow: 0 3px 10px rgba(0,102,204,.3); }
.btn-ask { background: var(--color-accent); color: #fff; }
.btn-ask:hover { background: var(--color-accent-dk); text-decoration: none; box-shadow: 0 3px 10px rgba(232,68,10,.3); }

/* ── Hero bar ── */
.hero-bar {
    background: linear-gradient(135deg, #003d99 0%, #0066cc 55%, #0096e6 100%);
    color: #fff;
    border-radius: var(--radius);
    padding: 32px 36px;
    display: flex; align-items: center; justify-content: space-between;
    gap: 20px; margin-bottom: 16px; flex-wrap: wrap;
    box-shadow: var(--shadow-md);
    position: relative; overflow: hidden;
}
.hero-bar::after {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(circle at 78% 50%, rgba(255,255,255,.1) 0%, transparent 55%);
    pointer-events: none;
}
.hero-text h1 { font-size: 28px; font-weight: 800; margin-bottom: 6px; letter-spacing: -.4px; }
.hero-text p  { font-size: 15px; opacity: .88; line-height: 1.5; }
.hero-bar .btn-ask {
    background: #ff4500; color: #fff; border-color: transparent;
    white-space: nowrap; box-shadow: 0 3px 12px rgba(0,0,0,.25); font-size: 15px; padding: 10px 22px;
}
.hero-bar .btn-ask:hover { background: #cc3700; }

/* ── Sort bar ── */
.sort-bar {
    background: var(--color-card);
    border: 1px solid var(--color-border); border-radius: var(--radius);
    padding: 8px 12px;
    display: flex; align-items: center; gap: 4px;
    margin-bottom: 12px; box-shadow: var(--shadow);
}
.sort-bar a {
    display: flex; align-items: center; gap: 4px;
    padding: 7px 14px; border-radius: 20px;
    color: var(--color-muted); font-weight: 600; font-size: 14px;
    transition: background var(--transition), color var(--transition);
}
.sort-bar a:hover { background: var(--color-bg); color: var(--color-text); text-decoration: none; }
.sort-bar a.active { background: var(--color-primary-lt); color: var(--color-primary); text-decoration: none; }

/* ── Question Card ── */
.question-card {
    background: var(--color-card);
    border: 1px solid var(--color-border); border-radius: var(--radius);
    display: flex; gap: 0; margin-bottom: 10px;
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.question-card:hover {
    box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: #c8d0da;
}

.vote-col {
    width: 44px; min-width: 44px;
    display: flex; flex-direction: column; align-items: center;
    padding: 10px 4px; gap: 4px;
    background: #f8f9fb;
    border-radius: var(--radius) 0 0 var(--radius);
    border-right: 1px solid var(--color-border);
}
.vote-btn {
    background: none; border: none; cursor: pointer;
    color: var(--color-muted); padding: 5px; border-radius: var(--radius-sm);
    line-height: 1; font-size: 18px;
    transition: color var(--transition), background var(--transition);
}
.vote-btn:hover { color: var(--color-accent); background: rgba(232,68,10,.08); }
.vote-btn.voted-up { color: var(--color-vote-up); }
.vote-btn.voted-down { color: var(--color-vote-dn); }
.vote-count { font-size: 13px; font-weight: 700; color: var(--color-text); line-height: 1; }

.card-body { flex: 1; padding: 12px 14px; min-width: 0; }
.card-stats { display: flex; gap: 12px; font-size: 12px; color: var(--color-muted); margin-bottom: 7px; align-items: center; }
.stat-answers { color: var(--color-primary); font-weight: 700; }
.stat-answers.has-accepted {
    color: var(--color-accepted); background: rgba(46,204,113,.1);
    padding: 2px 8px; border-radius: 20px;
}

.question-title { font-size: 17px; font-weight: 600; line-height: 1.35; margin-bottom: 6px; letter-spacing: -.1px; }
.question-title a { color: var(--color-text); transition: color var(--transition); }
.question-title a:hover { color: var(--color-primary); text-decoration: none; }

.question-excerpt {
    color: var(--color-muted); font-size: 13px; margin-bottom: 10px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.5;
}

.card-footer { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.tag {
    background: var(--color-tag-bg); color: var(--color-tag-txt);
    border: 1px solid rgba(0,85,187,.15); border-radius: 20px;
    padding: 3px 10px; font-size: 12px; font-weight: 500; cursor: pointer;
    transition: background var(--transition);
}
.tag:hover { background: #d8e8fb; text-decoration: none; }
.card-meta { margin-left: auto; font-size: 12px; color: var(--color-muted); }
.card-meta a { color: var(--color-primary); }

/* ── Accepted badge ── */
.badge-accepted {
    display: inline-flex; align-items: center; gap: 4px;
    background: var(--color-accepted); color: #fff;
    border-radius: 20px; padding: 2px 10px; font-size: 12px; font-weight: 700;
}

/* ── Single Question ── */
.question-thread { display: flex; flex-direction: column; gap: 16px; }

.question-full {
    background: var(--color-card); border: 1px solid var(--color-border);
    border-radius: var(--radius); display: flex; gap: 0; box-shadow: var(--shadow);
}
.question-full .vote-col { width: 52px; min-width: 52px; }
.question-full .card-body { padding: 20px; }

.question-body-content { font-size: 15px; line-height: 1.8; margin: 14px 0; }
.question-body-content pre {
    background: #f6f8fa; border: 1px solid var(--color-border);
    border-radius: var(--radius-sm); padding: 14px 18px; overflow-x: auto; margin: 14px 0;
}
.question-body-content code {
    font-family: var(--font-mono); font-size: 13px;
    background: #f0f2f5; padding: 2px 6px; border-radius: 4px; color: #c7254e;
}
.question-body-content pre code { background: none; padding: 0; color: inherit; }

.question-actions {
    display: flex; gap: 12px; align-items: center;
    padding: 10px 0; border-top: 1px solid var(--color-border);
    font-size: 13px; color: var(--color-muted); margin-top: 14px;
}
.action-btn {
    background: none; border: none; cursor: pointer;
    color: var(--color-muted); font-size: 13px; padding: 4px 8px; border-radius: var(--radius-sm);
    transition: background var(--transition), color var(--transition);
    font-family: var(--font-sans);
}
.action-btn:hover { background: var(--color-bg); color: var(--color-text); }

/* ── Answers section ── */
.answers-section {
    background: var(--color-card); border: 1px solid var(--color-border);
    border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
}
.answers-header {
    padding: 14px 20px; border-bottom: 1px solid var(--color-border);
    font-size: 18px; font-weight: 700; color: var(--color-text); background: #fafbfc;
}
.answer-item {
    display: flex; border-bottom: 1px solid var(--color-border);
    transition: background var(--transition);
}
.answer-item:last-child { border-bottom: none; }
.answer-item:hover { background: #fafbfc; }
.answer-item .vote-col { width: 52px; min-width: 52px; }
.answer-body { flex: 1; padding: 20px; }
.answer-body-content { font-size: 15px; line-height: 1.8; }
.answer-body-content pre {
    background: #f6f8fa; border: 1px solid var(--color-border);
    border-radius: var(--radius-sm); padding: 14px 18px; overflow-x: auto; margin: 14px 0;
}
.answer-body-content code {
    font-family: var(--font-mono); font-size: 13px;
    background: #f0f2f5; padding: 2px 6px; border-radius: 4px; color: #c7254e;
}
.answer-body-content pre code { background: none; padding: 0; color: inherit; }
.answer-accepted { border-left: 3px solid var(--color-accepted); }
.accepted-marker {
    color: var(--color-accepted); font-weight: 700; font-size: 13px;
    display: inline-flex; align-items: center; gap: 6px; margin-bottom: 10px;
    background: rgba(46,204,113,.1); padding: 4px 12px; border-radius: 20px;
}

/* ── Post Answer Form ── */
.post-answer {
    background: var(--color-card); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow);
}
.post-answer h3 { font-size: 18px; font-weight: 700; margin-bottom: 14px; }
.post-answer textarea {
    width: 100%; min-height: 200px; padding: 14px;
    border: 1.5px solid var(--color-border); border-radius: var(--radius-sm);
    font-family: var(--font-sans); font-size: 14px; resize: vertical; line-height: 1.6;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.post-answer textarea:focus {
    outline: none; border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0,102,204,.1);
}
.post-answer .btn { margin-top: 12px; }

/* ── Ask Question Form ── */
.ask-form {
    background: var(--color-card); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 28px; max-width: 860px; box-shadow: var(--shadow);
}
.ask-form h1 { font-size: 26px; font-weight: 800; margin-bottom: 22px; letter-spacing: -.3px; }
.form-group { margin-bottom: 22px; }
.form-group label { display: block; font-weight: 700; margin-bottom: 6px; font-size: 15px; }
.form-group .hint { font-size: 13px; color: var(--color-muted); margin-bottom: 8px; }
.form-group input[type="text"],
.form-group textarea,
.form-group select {
    width: 100%; padding: 11px 14px;
    border: 1.5px solid var(--color-border); border-radius: var(--radius-sm);
    font-family: var(--font-sans); font-size: 14px;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none; border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0,102,204,.1);
}
.form-group textarea { min-height: 250px; resize: vertical; line-height: 1.6; }

/* ── Sidebar ── */
.sidebar { display: flex; flex-direction: column; gap: 16px; }
.sidebar-widget {
    background: var(--color-card); border: 1px solid var(--color-border);
    border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
}
.widget-header {
    background: linear-gradient(135deg, var(--color-primary-dk) 0%, var(--color-primary) 100%);
    color: #fff; padding: 11px 16px; font-weight: 700; font-size: 14px;
    letter-spacing: .03em;
}
.widget-body { padding: 14px 16px; }
.widget-body p { font-size: 14px; line-height: 1.6; margin-bottom: 14px; color: var(--color-muted); }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; }

.top-users-list { list-style: none; }
.top-users-list li {
    display: flex; align-items: center; gap: 8px;
    padding: 7px 0; border-bottom: 1px solid var(--color-border); font-size: 13px;
}
.top-users-list li:last-child { border-bottom: none; }
.user-rank { font-weight: 700; color: var(--color-muted); width: 16px; }
.user-rep { margin-left: auto; color: var(--color-primary); font-size: 12px; font-weight: 600; }

/* ── Pagination ── */
.pagination { display: flex; justify-content: center; gap: 6px; padding: 20px 0; }
.pagination a, .pagination span {
    display: flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm); font-size: 14px; font-weight: 600;
    transition: all var(--transition);
}
.pagination a { background: var(--color-card); }
.pagination a:hover { border-color: var(--color-primary); color: var(--color-primary); text-decoration: none; box-shadow: 0 0 0 3px rgba(0,102,204,.1); }
.pagination .current { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* ── Notice / Alert ── */
.notice { padding: 13px 18px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: 14px; }
.notice-info { background: var(--color-primary-lt); border-left: 4px solid var(--color-primary); }
.notice-login { background: #fff8e6; border-left: 4px solid #f59e0b; }

/* ── 404 / Empty states ── */
.empty-state { text-align: center; padding: 56px 20px; color: var(--color-muted); }
.empty-state h2 { font-size: 26px; margin-bottom: 10px; color: var(--color-text); font-weight: 800; }
.empty-state p { font-size: 16px; margin-bottom: 24px; }

/* ── Breadcrumbs ── */
.breadcrumbs { padding: 12px 0 4px; font-size: 13px; color: var(--color-muted); }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.breadcrumbs li + li::before { content: '›'; margin-right: 4px; color: var(--color-muted); }
.breadcrumbs a { color: var(--color-primary); }
.breadcrumbs [aria-current="page"] { color: var(--color-muted); }

/* ── Screen reader only ── */
.screen-reader-text {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
    white-space: nowrap; border: 0;
}

/* ── Footer ── */
.site-footer { background: #12122a; margin-top: 48px; }
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 48px 20px 24px; }
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px; margin-bottom: 40px;
}
.footer-logo {
    font-size: 20px; font-weight: 800; color: #fff;
    display: flex; align-items: center; gap: 10px; margin-bottom: 12px; text-decoration: none;
}
.footer-logo:hover { text-decoration: none; color: #fff; }
.footer-logo svg { width: 30px; height: 30px; }
.footer-brand p { font-size: 13px; line-height: 1.7; color: rgba(255,255,255,.5); max-width: 260px; }
.footer-col h4 {
    color: rgba(255,255,255,.9); font-size: 12px; font-weight: 700;
    text-transform: uppercase; letter-spacing: .1em; margin-bottom: 16px;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
    color: rgba(255,255,255,.5); font-size: 13px;
    transition: color var(--transition);
}
.footer-col ul a:hover { color: rgba(255,255,255,.9); text-decoration: none; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.08); padding-top: 20px;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 12px; font-size: 12px; color: rgba(255,255,255,.35);
}
.footer-bottom a { color: rgba(255,255,255,.35); }
.footer-bottom a:hover { color: rgba(255,255,255,.7); text-decoration: none; }

@media (max-width: 700px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

/* ── Responsive ── */
@media (max-width: 600px) {
    .question-title { font-size: 15px; }
    .header-search { display: none; }
    .header-nav { display: none; }
    .card-stats { display: none; }
    .hero-bar { padding: 22px; }
    .hero-text h1 { font-size: 22px; }
}