/* ==========================================================================
   ctrl + Q Academy — Shared Stylesheet
   ========================================================================== */
:root {
    --transition-speed: 0.2s;
    --bg-color: #ffffff;
    --card-bg: #f8fafc;
    --accent-color: #1e40af;
    --accent-hover: #1e3a8a;
    --text-main: #0f172a;
    --text-muted: #475569;
    --border-color: #cbd5e1;
    --code-bg: #f1f5f9;
    --panel-bg: #e2e8f0;
    --footer-bg: #f1f5f9;
    --success: #0284c7;
    --input-bg: #ffffff;
    --premium-color: #0369a1;
    --premium-hover: #075985;
    --green: #16a34a;
    --red: #dc2626;
    --gold: #b45309;
}

[data-theme="contrast"] {
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --accent-color: #0f172a;
    --accent-hover: #1e293b;
    --text-main: #000000;
    --text-muted: #334155;
    --border-color: #94a3b8;
    --code-bg: #e2e8f0;
    --panel-bg: #cbd5e1;
    --footer-bg: #cbd5e1;
    --success: #0369a1;
    --input-bg: #ffffff;
    --premium-color: #0f172a;
    --premium-hover: #1e293b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    position: relative;
}

.page-center-watermark {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 42px;
    font-weight: 900;
    font-family: monospace;
    color: var(--border-color);
    opacity: 0.1;
    letter-spacing: 6px;
    white-space: nowrap;
    pointer-events: none;
    z-index: 0;
    text-transform: uppercase;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 5%;
    background-color: var(--bg-color);
    border-bottom: 2px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    flex-wrap: wrap;
    gap: 12px;
}

.logo {
    font-family: 'SFMono-Regular', Consolas, Menlo, monospace;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-main);
    white-space: nowrap;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo img { width: 28px; height: 28px; border-radius: 6px; }
.logo span { color: var(--accent-color); }

nav { display: flex; align-items: center; flex-wrap: wrap; z-index: 10; }

nav a {
    color: var(--text-muted);
    text-decoration: none;
    margin: 0 5px;
    font-size: 13.5px;
    font-weight: 600;
    padding: 6px 10px;
    border-radius: 4px;
    white-space: nowrap;
}
nav a:hover, nav a.active { color: var(--accent-color); background: rgba(30, 64, 175, 0.06); }
nav a.premium-nav-item { color: var(--premium-color); border: 1px dashed var(--premium-color); }
nav a.premium-nav-item:hover, nav a.premium-nav-item.active { color: #ffffff; background: var(--premium-color); border-style: solid; }

.header-actions { display: flex; align-items: center; gap: 12px; z-index: 10; }

button {
    cursor: pointer; border: none; border-radius: 4px;
    font-weight: 600; font-size: 14px; padding: 10px 20px;
    font-family: inherit;
}

.btn-theme { background: transparent; border: 1px solid var(--border-color); color: var(--text-main); }
.btn-theme:hover { background: var(--panel-bg); }

.btn-search { background: rgba(30, 64, 175, 0.04); color: var(--accent-color); border: 1px solid var(--accent-color); letter-spacing: 0.3px; display: flex; align-items: center; gap: 8px; }
.btn-search:hover { background: var(--accent-color); color: #ffffff; box-shadow: 0 4px 12px rgba(30, 64, 175, 0.15); }
.kbd-hint { background: rgba(255,255,255,0.18); border: 1px solid rgba(255,255,255,0.3); border-radius: 4px; padding: 1px 6px; font-size: 10.5px; font-family: monospace; font-weight: 700; }
.btn-search .kbd-hint { background: var(--panel-bg); border-color: var(--border-color); color: var(--text-muted); }
.btn-search:hover .kbd-hint { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.35); color: #ffffff; }

/* Courses dropdown (native <details>, no extra JS needed for open/close) */
.nav-dropdown { position: relative; }
.nav-dropdown summary { list-style: none; cursor: pointer; display: inline-flex; align-items: center; gap: 4px; }
.nav-dropdown summary::-webkit-details-marker { display: none; }
.nav-dropdown .dd-caret { font-size: 10px; transition: transform 0.15s ease; }
.nav-dropdown[open] .dd-caret { transform: rotate(180deg); }
.nav-dropdown .dropdown-panel {
    position: absolute; top: calc(100% + 8px); left: 0; min-width: 260px;
    background: var(--bg-color); border: 1px solid var(--border-color); border-radius: 8px;
    box-shadow: 0 12px 28px rgba(15,23,42,0.12); padding: 8px; z-index: 200;
    display: grid; grid-template-columns: 1fr; gap: 2px;
}
.dropdown-link {
    display: block; padding: 9px 12px; border-radius: 6px; text-decoration: none;
    color: var(--text-main); font-size: 13.5px; font-weight: 600;
}
.dropdown-link:hover { background: var(--panel-bg); }
.dropdown-link.active { color: var(--accent-color); background: rgba(30,64,175,0.06); }
.dropdown-link.premium-dropdown-link { border-top: 1px solid var(--border-color); margin-top: 6px; padding-top: 12px; color: var(--premium-color); }

.btn-primary { background: var(--accent-color); color: #ffffff; padding: 14px 32px; }
.btn-primary:hover { background: var(--accent-hover); }

.btn-premium { background: var(--premium-color); color: #ffffff; font-weight: 700; }
.btn-premium:hover { background: var(--premium-hover); }

.btn-gold { background: var(--gold); color: #ffffff; font-weight: 700; }
.btn-gold:hover { background: #92400e; }

a.link-btn { text-decoration: none; display: inline-block; }

.container { max-width: 1180px; margin: 40px auto; padding: 0 20px; flex: 1; position: relative; z-index: 5; width: 100%; }

.hero { text-align: center; max-width: 820px; margin: 60px auto 40px; }
.hero h1 { font-size: 50px; font-weight: 800; line-height: 1.15; margin-bottom: 22px; letter-spacing: -1px; color: var(--accent-color); }
.hero p { color: var(--text-muted); font-size: 18px; margin-bottom: 32px; }

.hidden { display: none !important; }

.stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 900px; margin: 0 auto 50px; }
.stat-item { text-align: center; padding: 18px 10px; border: 1px solid var(--border-color); border-radius: 8px; background: var(--card-bg); }
.stat-number { font-size: 28px; font-weight: 800; color: var(--accent-color); }
.stat-label { font-size: 12.5px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; margin-top: 4px; }

.module-header { margin-bottom: 40px; border-bottom: 2px solid var(--border-color); padding-bottom: 24px; }
.module-header h2 { font-size: 32px; font-weight: 800; color: var(--accent-color); }
.subtitle { color: var(--text-muted); font-size: 16px; margin-top: 6px; }

.breadcrumb { font-size: 13px; color: var(--text-muted); margin-bottom: 18px; }
.breadcrumb a { color: var(--accent-color); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

.section-heading { font-size: 24px; font-weight: 800; margin: 60px 0 20px; color: var(--accent-color); text-align: center; }

.curriculum-tier-title { font-size: 18px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--accent-color); margin: 30px 0 15px 0; padding-left: 10px; border-left: 4px solid var(--accent-color); }

.learning-stack { display: grid; grid-template-columns: 1fr; gap: 26px; margin-bottom: 50px; }

.concept-card { background: var(--card-bg); border: 1px solid var(--border-color); padding: 28px; border-radius: 8px; position: relative; }

.badge { background: rgba(30, 64, 175, 0.08); color: var(--accent-color); padding: 4px 12px; border-radius: 4px; font-size: 11px; font-weight: 700; text-transform: uppercase; display: inline-block; margin-bottom: 12px; border: 1px solid var(--border-color); margin-right: 6px; }
.badge.critical { background: rgba(239, 68, 68, 0.08); color: #dc2626; border: 1px solid rgba(239, 68, 68, 0.2); }
.badge.premium-badge { background: rgba(3, 105, 161, 0.08); color: var(--premium-color); border: 1px solid rgba(3, 105, 161, 0.2); }
.badge.exam-badge { background: rgba(180, 83, 9, 0.08); color: var(--gold); border: 1px solid rgba(180, 83, 9, 0.25); }

.theory { color: var(--text-main); margin: 12px 0 20px 0; font-size: 15.5px; }
.theory ul, .theory ol { margin: 10px 0 10px 22px; }
.theory li { margin-bottom: 6px; }
.theory code, li code, p code { background: var(--code-bg); padding: 2px 6px; border-radius: 4px; font-family: 'SFMono-Regular', Consolas, Menlo, monospace; font-size: 0.9em; border: 1px solid var(--border-color); }

.comprehension-diagram { background: var(--input-bg); border: 1px solid var(--border-color); border-radius: 6px; padding: 16px; margin: 20px 0; font-family: monospace; font-size: 13px; }
.diagram-title { color: var(--accent-color); font-weight: bold; margin-bottom: 10px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.pipeline-flow { display: flex; align-items: center; justify-content: space-between; gap: 10px; overflow-x: auto; padding: 10px 0; }
.pipeline-step { background: var(--panel-bg); border: 1px solid var(--border-color); padding: 8px 14px; border-radius: 4px; text-align: center; min-width: 130px; font-weight: bold; font-size: 13px; text-decoration: none; color: var(--text-main); }
.pipeline-arrow { color: var(--accent-color); font-weight: 900; }

.premium-resource-grid, .catalog-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 25px; margin-top: 20px; }
.premium-card { border: 1px solid var(--border-color); background: var(--card-bg); }

.catalog-card { border: 1px solid var(--border-color); background: var(--card-bg); border-radius: 10px; padding: 26px; text-align: left; cursor: pointer; display: block; width: 100%; text-decoration: none; color: inherit; }
.catalog-card:hover { border-color: var(--accent-color); box-shadow: 0 6px 18px rgba(30,64,175,0.08); }
.catalog-icon { font-size: 30px; margin-bottom: 10px; display: block; }
.catalog-card h3 { font-size: 18px; margin-bottom: 6px; color: var(--text-main); }
.catalog-card p { font-size: 13.5px; color: var(--text-muted); margin-bottom: 12px; }
.catalog-meta { font-size: 11.5px; color: var(--accent-color); font-weight: 700; text-transform: uppercase; letter-spacing: 0.4px; }

.premium-gateway-panel { background: var(--card-bg); border: 2px solid var(--border-color); border-radius: 12px; padding: 45px; text-align: center; max-width: 680px; margin: 40px auto; }
.premium-input-group { display: flex; gap: 12px; max-width: 480px; margin: 25px auto 10px; }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-bottom: 40px; }
.value-pill { background: var(--panel-bg); padding: 15px 20px; border-radius: 6px; margin-top: 15px; border-left: 4px solid var(--accent-color); }

.code-window { background: var(--code-bg); border-radius: 6px; border: 1px solid var(--border-color); overflow: hidden; margin: 20px 0; }
.code-header { background: var(--panel-bg); padding: 10px 18px; font-size: 12px; color: var(--text-muted); font-family: monospace; border-bottom: 1px solid var(--border-color); }
pre { padding: 20px; overflow-x: auto; color: var(--text-main); }
code { font-family: 'SFMono-Regular', Consolas, Menlo, monospace; font-size: 13.5px; }

.sandbox-area { margin-top: 25px; background: var(--code-bg); padding: 24px; border-radius: 6px; border: 1px solid var(--border-color); }
.sandbox-area h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); margin-bottom: 12px; }

textarea, select, input[type="text"], input[type="email"], input[type="password"] {
    width: 100%; background: var(--input-bg); color: var(--text-main); border: 1px solid var(--border-color);
    padding: 14px; border-radius: 6px; font-size: 14px;
}
textarea { height: 120px; font-family: monospace; resize: vertical; }
textarea.tall { height: 180px; }
textarea:focus, select:focus, input:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.15); }

.sandbox-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 12px; }

.output-box { background: var(--input-bg); color: var(--success); padding: 14px; font-family: monospace; border-radius: 4px; margin-top: 14px; min-height: 48px; font-size: 13.5px; border: 1px solid var(--border-color); border-left: 4px solid var(--success); white-space: pre-wrap; word-break: break-word; }

/* Quiz / Exam */
.quiz-box { margin-top: 22px; padding: 22px; background: var(--input-bg); border: 1px solid var(--border-color); border-radius: 6px; }
.quiz-question { font-weight: 700; margin-bottom: 14px; font-size: 14.5px; }
.quiz-option { display: block; width: 100%; text-align: left; margin-bottom: 8px; padding: 10px 14px; background: var(--card-bg); border: 1px solid var(--border-color); border-radius: 4px; cursor: pointer; font-weight: 600; font-size: 13.5px; color: var(--text-main); }
.quiz-option:hover { background: var(--panel-bg); border-color: var(--accent-color); }
.quiz-option.correct-answer { background: rgba(22,163,74,0.12); border-color: var(--green); color: var(--green); }
.quiz-option.wrong-answer { background: rgba(220,38,38,0.1); border-color: var(--red); color: var(--red); }
.quiz-feedback { margin-top: 10px; font-size: 13px; font-weight: 600; display: none; }

.exam-intro-panel { background: var(--card-bg); border: 2px solid var(--border-color); border-radius: 12px; padding: 40px; text-align: center; max-width: 720px; margin: 0 auto 40px; }
.exam-progress-track { background: var(--panel-bg); border-radius: 6px; height: 10px; width: 100%; overflow: hidden; margin: 20px 0; }
.exam-progress-fill { background: var(--gold); height: 100%; width: 0%; transition: width 0.3s ease; }
.exam-question-card { background: var(--card-bg); border: 1px solid var(--border-color); padding: 30px; border-radius: 10px; margin-bottom: 22px; }
.exam-question-number { font-size: 12px; color: var(--gold); font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 10px; }
.exam-question-text { font-size: 17px; font-weight: 700; margin-bottom: 18px; }
.exam-option { display: flex; align-items: center; gap: 12px; width: 100%; text-align: left; padding: 13px 16px; margin-bottom: 10px; background: var(--input-bg); border: 1px solid var(--border-color); border-radius: 6px; cursor: pointer; font-size: 14.5px; color: var(--text-main); }
.exam-option:hover { border-color: var(--accent-color); }
.exam-option.selected { border-color: var(--accent-color); background: rgba(30,64,175,0.06); font-weight: 700; }
.exam-option .opt-letter { display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%; background: var(--panel-bg); font-size: 12px; font-weight: 800; flex-shrink: 0; }

.exam-result-panel { text-align: center; padding: 50px 30px; border-radius: 12px; border: 2px solid var(--border-color); background: var(--card-bg); max-width: 640px; margin: 0 auto; }
.exam-result-panel.pass { border-color: var(--green); }
.exam-result-panel.fail { border-color: var(--red); }
.exam-score-number { font-size: 64px; font-weight: 900; margin: 10px 0; }
.exam-result-panel.pass .exam-score-number { color: var(--green); }
.exam-result-panel.fail .exam-score-number { color: var(--red); }

.cert-claim-form { max-width: 420px; margin: 26px auto 0; text-align: left; }
.cert-claim-form label { display: block; font-size: 13px; font-weight: 700; color: var(--text-muted); margin-bottom: 6px; }

/* Certificate page */
.certificate-stage { display: flex; justify-content: center; margin: 20px 0 30px; }
#certificateCanvas { max-width: 100%; height: auto; border: 1px solid var(--border-color); border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,0.08); }
.cert-controls { max-width: 520px; margin: 0 auto; text-align: center; }
.cert-controls .form-row { text-align: left; margin-bottom: 16px; }
.cert-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 10px; }
.cert-locked-panel { text-align: center; padding: 60px 30px; }

/* Profile Dashboard */
.profile-wrapper { display: grid; grid-template-columns: 320px 1fr; gap: 35px; margin-top: 20px; }
.profile-sidebar { background: var(--card-bg); border: 1px solid var(--border-color); padding: 35px 25px; border-radius: 12px; text-align: center; }
.avatar-container { position: relative; width: 105px; height: 105px; margin: 0 auto 20px auto; }
.avatar { width: 100%; height: 100%; background: linear-gradient(135deg, var(--accent-color), var(--premium-color)); color: #ffffff; font-size: 36px; font-weight: bold; display: flex; align-items: center; justify-content: center; border-radius: 50%; }
.user-status-tag { background: var(--panel-bg); border: 1px solid var(--border-color); padding: 4px 14px; border-radius: 20px; font-size: 11px; font-weight: 700; text-transform: uppercase; display: inline-block; margin-bottom: 20px; letter-spacing: 0.5px; }
.user-status-tag.premium-active-tag { background: rgba(3, 105, 161, 0.08); border-color: var(--premium-color); color: var(--premium-color); }
.profile-input { margin-bottom: 14px; text-align: left; }
.profile-sidebar label { display: block; text-align: left; font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 4px; padding-left: 4px; }

.progress-container { background: var(--panel-bg); border-radius: 6px; height: 16px; width: 100%; overflow: hidden; margin: 15px 0; border: 1px solid var(--border-color); }
.progress-bar { background: var(--accent-color); height: 100%; width: 0%; transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1); }
.track-progress-row { display:flex; justify-content:space-between; align-items:center; margin-bottom:10px; font-size:13.5px; gap: 10px; }
.track-progress-row .mini-bar-track { flex:1; height:8px; background:var(--panel-bg); border-radius:4px; overflow:hidden; }
.track-progress-row .mini-bar-fill { height:100%; background:var(--accent-color); }
.track-progress-row.certified .mini-bar-fill { background: var(--gold); }
.cert-mini-badge { font-size: 10.5px; font-weight: 800; color: var(--gold); text-transform: uppercase; }

.cert-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 16px; }
.cert-list-item { border: 1px solid var(--border-color); border-radius: 8px; padding: 18px; background: var(--input-bg); text-align: center; }
.cert-list-item .cert-icon { font-size: 26px; }
.cert-list-item a { font-size: 12.5px; font-weight: 700; color: var(--accent-color); text-decoration: none; }

.support-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: start; }
.form-row { margin-bottom: 20px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--text-muted); }

.log-stream { background: var(--code-bg); border: 1px solid var(--border-color); border-radius: 6px; height: 340px; overflow-y: auto; padding: 15px; font-family: monospace; font-size: 13px; }
.log-entry { border-bottom: 1px solid var(--border-color); padding-bottom: 10px; margin-bottom: 10px; }
.log-entry:last-child { border-bottom: none; }
.log-timestamp { color: var(--accent-color); font-weight: bold; }
.log-tag { background: var(--panel-bg); padding: 2px 6px; border-radius: 3px; font-size: 11px; color: var(--text-main); }

.faq-item { border: 1px solid var(--border-color); border-radius: 8px; margin-bottom: 12px; overflow: hidden; background: var(--card-bg); }
.faq-question { padding: 16px 20px; font-weight: 700; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-size: 14.5px; }
.faq-answer { padding: 0 20px; max-height: 0; overflow: hidden; transition: all 0.25s ease; color: var(--text-muted); font-size: 14px; }
.faq-answer.open { padding: 0 20px 18px; max-height: 400px; }

footer { background-color: var(--footer-bg); border-top: 2px solid var(--border-color); padding: 50px 8% 0; font-size: 13px; color: var(--text-muted); margin-top: auto; position: relative; z-index: 10; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; max-width: 1180px; margin: 0 auto; padding-bottom: 36px; }
.footer-col h4 { color: var(--text-main); font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 14px; }
.footer-col a { display: block; color: var(--text-muted); text-decoration: none; font-size: 13.5px; margin-bottom: 10px; }
.footer-col a:hover { color: var(--accent-color); }
.footer-brand-col p { font-size: 13px; line-height: 1.6; max-width: 260px; }
.footer-search-btn { background: var(--input-bg); border: 1px solid var(--border-color); color: var(--text-main); padding: 9px 14px; border-radius: 6px; font-size: 13px; font-weight: 600; cursor: pointer; }
.footer-search-btn:hover { background: var(--panel-bg); }
.footer-bottom { border-top: 1px solid var(--border-color); padding: 20px 0; text-align: center; max-width: 1180px; margin: 0 auto; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }

.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(15, 23, 42, 0.6); backdrop-filter: blur(4px); display: flex; justify-content: center; align-items: center; opacity: 0; pointer-events: none; z-index: 1000; transition: opacity 0.25s ease; }
.modal.show { opacity: 1; pointer-events: auto; }
.modal-content { background: var(--bg-color); padding: 40px; border-radius: 12px; width: 100%; max-width: 440px; position: relative; border: 2px solid var(--border-color); box-shadow: 0 20px 40px rgba(0,0,0,0.1); }
.close-btn { position: absolute; top: 20px; right: 22px; font-size: 24px; cursor: pointer; color: var(--text-muted); line-height: 1; }
.close-btn:hover { color: var(--text-main); }
.modal .form-group { margin: 18px 0; }
.modal .form-group label { display: block; font-size: 13px; margin-bottom: 6px; color: var(--text-muted); font-weight: 600; }

/* Command Palette */
.command-palette-content { max-width: 560px; padding: 0; overflow: hidden; }
.cp-input-row { display: flex; align-items: center; gap: 10px; padding: 18px 20px; border-bottom: 1px solid var(--border-color); }
.cp-icon { font-size: 16px; }
#commandPaletteInput { border: none; padding: 4px 0; font-size: 16px; box-shadow: none !important; }
#commandPaletteInput:focus { outline: none; box-shadow: none !important; }
.cp-esc-hint { font-size: 10.5px; font-weight: 700; color: var(--text-muted); background: var(--panel-bg); border: 1px solid var(--border-color); border-radius: 4px; padding: 2px 6px; font-family: monospace; }
.command-palette-results { max-height: 380px; overflow-y: auto; padding: 10px; }
.cp-group-label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); padding: 10px 10px 4px; }
.cp-result-link { display: flex; align-items: center; gap: 10px; padding: 11px 12px; border-radius: 6px; text-decoration: none; color: var(--text-main); font-size: 14px; font-weight: 600; }
.cp-result-link:hover, .cp-result-link:first-of-type { background: var(--panel-bg); }
.cp-empty { padding: 30px 20px; text-align: center; color: var(--text-muted); font-size: 14px; }

/* In-page Table of Contents */
.toc-panel { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: -14px 0 40px; }
.toc-label { font-size: 12px; font-weight: 700; color: var(--text-muted); margin-right: 4px; }
.toc-panel a { font-size: 12.5px; font-weight: 600; color: var(--accent-color); background: var(--card-bg); border: 1px solid var(--border-color); padding: 6px 13px; border-radius: 20px; text-decoration: none; }
.toc-panel a:hover { background: var(--panel-bg); }
.toc-panel a.toc-exam-link { color: var(--gold); border-color: rgba(180,83,9,0.3); }

/* Syntax highlighting blend */
.hljs { background: transparent !important; padding: 0 !important; }
pre .hljs { display: block; }

table.data-table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 13.5px; }
table.data-table th, table.data-table td { border: 1px solid var(--border-color); padding: 8px 10px; text-align: left; }
table.data-table th { background: var(--panel-bg); }

.cert-share-toast { position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--accent-color); color: #fff; padding: 12px 22px; border-radius: 8px; font-size: 13.5px; font-weight: 600; box-shadow: 0 10px 24px rgba(0,0,0,0.18); opacity: 0; pointer-events: none; transition: all 0.25s ease; z-index: 500; }
.cert-share-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 900px) {
    .profile-wrapper, .about-grid, .support-grid { grid-template-columns: 1fr; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); }
    .hero h1 { font-size: 36px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .nav-dropdown .dropdown-panel { left: auto; right: 0; }
    .btn-search .kbd-hint { display: none; }
}