:root{
    --bg:#0b0f14;
    --panel:#121821;
    --panel-2:#171f2b;
    --line:#222b38;
    --line-soft:#1b2330;
    --text:#eef2f7;
    --muted:#98a2b3;
    --blue:#4f8cff;
    --gold:#f0a52b;
    --hover:#1b2430;
    --success:#10b981;
    --danger:#ef4444;
    --shadow:0 8px 24px rgba(0,0,0,.24);
    --radius:18px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Inter, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.modern-shell {
    display: flex;
    min-height: 100vh;
    background: var(--bg);
}

.mini-sidebar {
    width: 78px;
    background: #0d131b;
    border-right: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 0;
    position: sticky;
    top: 0;
    height: 100vh;
    z-index: 10;
}

.mini-sidebar__brand {
    text-decoration: none;
    margin-bottom: 22px;
}

.brand-box {
    display:flex;
    align-items:center;
    justify-content:center;
    width:40px;
    height:40px;
    border-radius:14px;
    background:#c62828;
    color:#fff;
    font-size:18px;
    font-weight:800;
    box-shadow: var(--shadow);
}

.mini-sidebar__nav,
.mini-sidebar__footer {
    display:flex;
    flex-direction:column;
    gap:12px;
    width:100%;
    align-items:center;
}

.mini-sidebar__footer {
    margin-top:auto;
    padding-top:16px;
}

.mini-sidebar__item {
    width:46px;
    height:46px;
    border-radius:14px;
    display:flex;
    align-items:center;
    justify-content:center;
    position:relative;
    text-decoration:none;
    color:#a9b4c2;
    background:transparent;
    transition:.2s ease;
}

.mini-sidebar__item:hover,
.mini-sidebar__item.is-active {
    background: var(--hover);
    color: #fff;
}

.mini-sidebar__icon {
    font-size: 18px;
    line-height: 1;
}

.mini-sidebar__tooltip {
    position: absolute;
    left: 58px;
    top: 50%;
    transform: translateY(-50%);
    background: #121821;
    border: 1px solid var(--line);
    color: #fff;
    padding: 6px 10px;
    border-radius: 10px;
    font-size: 12px;
    opacity: 0;
    pointer-events: none;
    white-space: nowrap;
}

.mini-sidebar__item:hover .mini-sidebar__tooltip {
    opacity: 1;
}

.modern-content {
    flex: 1;
    min-width: 0;
    padding: 22px 28px 32px;
}

.app-topbar {
    display:flex;
    align-items:center;
    gap:14px;
    margin-bottom:18px;
}

.app-topbar__menu {
    width:46px;
    height:46px;
    border-radius:14px;
    border:1px solid var(--line);
    background:var(--panel);
    color:#dbe3ee;
    cursor:pointer;
}

.app-topbar__spacer {
    flex:1;
}

.app-topbar__meta {
    display:flex;
    align-items:center;
    gap:10px;
}

.topbar-chip {
    display:inline-flex;
    align-items:center;
    padding:8px 12px;
    border-radius:999px;
    background:#121821;
    border:1px solid var(--line);
    color:#dbe3ee;
    font-size:13px;
    font-weight:700;
}

.topbar-avatar {
    width:42px;
    height:42px;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    background:#6d28d9;
    color:#fff;
    font-weight:700;
}

.page-breadcrumbs{
    display:flex;
    align-items:center;
    gap:10px;
    color:var(--muted);
    font-size:14px;
    margin-bottom:18px;
}

.crumb-link{color:var(--muted);text-decoration:none;}
.crumb-link:hover{color:#fff;}
.crumb-current{color:#c6ced8;}
.crumb-sep{color:#5d6673;}

.page-header-card{
    background:transparent;
    border-bottom:1px solid var(--line);
    padding-bottom:20px;
    margin-bottom:24px;
}

.page-header-top{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:18px;
    margin-bottom:18px;
}

.page-title-wrap{
    display:flex;
    align-items:center;
    gap:14px;
    min-width: 0;
}

.page-title-icon{
    width:44px;
    height:44px;
    border-radius:14px;
    background:rgba(79,140,255,.08);
    color:var(--blue);
    display:flex;
    align-items:center;
    justify-content:center;
    flex-shrink:0;
}

.page-title-icon svg{width:24px;height:24px;}

.page-title{
    margin:0;
    font-size:40px;
    line-height:1.05;
    font-weight:800;
    letter-spacing:-.02em;
}

.page-subtitle {
    margin: 8px 0 0;
    color: var(--muted);
    max-width: 760px;
}

.page-badges{
    display:flex;
    gap:8px;
    margin-top:12px;
    flex-wrap:wrap;
}

.page-badge,
.badge{
    display:inline-flex;
    align-items:center;
    padding:6px 10px;
    border-radius:10px;
    font-size:12px;
    font-weight:700;
    letter-spacing:.02em;
    border:1px solid transparent;
}

.page-badge--dark,
.badge{
    background:#1a2230;
    border-color:#273244;
    color:#dce3ec;
}

.page-badge--gold{
    background:rgba(240,165,43,.12);
    border-color:rgba(240,165,43,.28);
    color:#ffc861;
}

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

.icon-toggle{
    width:42px;
    height:42px;
    border-radius:12px;
    border:1px solid var(--line);
    background:var(--panel);
    color:#c8d0da;
    cursor:pointer;
    font-size:18px;
}

.icon-toggle.is-active,
.icon-toggle:hover{background:#fff;color:#111827;}

.page-header-toolbar{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
}

.header-search-form{
    position:relative;
    flex:1;
    min-width:280px;
    max-width:920px;
}

.search-icon{
    position:absolute;
    left:16px;
    top:50%;
    transform:translateY(-50%);
    color:#7f8a98;
    font-size:17px;
    pointer-events:none;
}

.header-search-input{
    width:100%;
    height:52px;
    border-radius:14px;
    border:1px solid var(--line);
    background:#0f151e;
    color:#fff;
    padding:0 16px 0 44px;
    outline:none;
    font-size:15px;
}

.header-search-input::placeholder{color:#7f8a98;}
.header-search-input:focus{border-color:#355b9d;box-shadow:0 0 0 3px rgba(79,140,255,.12);}

.toolbar-tabs{display:flex;gap:8px;align-items:center;}
.toolbar-tab{
    height:44px;
    padding:0 16px;
    border-radius:12px;
    border:1px solid var(--line);
    background:var(--panel);
    color:#c8d0da;
    font-weight:700;
    cursor:pointer;
    text-decoration:none;
    display:inline-flex;
    align-items:center;
}
.toolbar-tab.is-active,.toolbar-tab:hover{background:#161e2a;color:#fff;}

.card, .subcard, .question-box, .review-box {
    background: linear-gradient(180deg, rgba(19,24,33,0.98), rgba(16,22,31,0.96));
    border: 1px solid #1f2937;
    border-radius: 20px;
    padding: 20px;
    margin-bottom: 18px;
    box-shadow: var(--shadow);
}

.narrow { max-width: 520px; }

.grid { display: grid; gap: 18px; }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid.four { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

label { display:block; margin-top:12px; margin-bottom:6px; color:#cbd5e1; }
input, textarea, select, button {
    width:100%;
    padding:12px 14px;
    border-radius:12px;
    border:1px solid #334155;
    background:#111827;
    color:#f3f4f6;
}
textarea { min-height: 120px; }

button, .button-link {
    margin-top: 12px;
    background: #2563eb;
    color: white;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
    border: none;
    width: auto;
    min-width: 120px;
}

.button-link { padding: 10px 14px; border-radius: 12px; }
.button-link.secondary, button.secondary { background:#334155; }

.flash {
    padding: 12px 14px;
    border-radius: 12px;
    margin-bottom: 14px;
}

.flash.success { background: rgba(6,78,59,.95); border:1px solid var(--success); }
.flash.error { background: rgba(127,29,29,.95); border:1px solid var(--danger); }
.flash.info { background: rgba(23,37,84,.95); border:1px solid #60a5fa; }

.modern-flash { box-shadow: var(--shadow); }

table { width:100%; border-collapse: collapse; }
th, td {
    padding: 12px 10px;
    border-bottom: 1px solid #253042;
    text-align: left;
    vertical-align: top;
}
table tr:hover td { background: rgba(255,255,255,0.02); }

.inline-form { display:grid; gap:8px; }
.muted { color:#94a3b8; }
.option-list label {
    display:flex;
    gap:8px;
    align-items:center;
    border:1px solid #334155;
    border-radius:12px;
    padding:10px;
    margin-bottom:10px;
    cursor:pointer;
}
.option-list input[type="radio"] { width:auto; margin:0; }
.reading-passage { white-space: pre-wrap; line-height:1.7; }
.code-note {
    background:#111827;
    border-left:4px solid #60a5fa;
    padding:12px;
    color:#cbd5e1;
    border-radius: 10px;
}
.small{font-size:13px;}
.review-box,.subcard{border:1px solid #2d3b55;}
p{line-height:1.6;}
.card h1,.card h2,.card h3{margin-top:0;}
.inline-form button{width:auto;}
.sidebar-meta{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap;}
.transaction-positive{color:#34d399;font-weight:700;}
.transaction-negative{color:#f87171;font-weight:700;}
.success { border-color: rgba(16,185,129,.45); }

@media (max-width: 900px){
    .page-title{font-size:30px;}
    .page-header-top{flex-direction:column;align-items:flex-start;}
    .header-actions{align-self:flex-end;}
}

@media (max-width: 760px) {
    .modern-content { padding: 18px 14px 22px; }
    .mini-sidebar { width: 64px; }
    .page-title { font-size: 26px; }
    .page-header-toolbar { align-items: stretch; }
    .header-search-form { min-width: 100%; }
    .mini-sidebar__tooltip { display:none; }
}


/* header stabilization patch */
.mini-sidebar__tooltip{display:none !important;}
.page-title-icon{width:56px; height:56px; min-width:56px; min-height:56px;}
.page-title-icon__glyph{font-size:28px; line-height:1;}
.app-topbar{justify-content:flex-end; margin-bottom:14px;}
.app-topbar__menu{display:none !important;}
.topbar-role-chip{display:inline-flex; align-items:center; padding:8px 12px; border-radius:999px; background:#121821; border:1px solid var(--line); color:#dbe3ee; font-size:13px; font-weight:700;}
.icon-toggle, .toolbar-tab, .app-topbar__menu{width:auto; min-width:42px; padding:0 14px;}
.icon-toggle{padding:0; width:42px;}
.header-actions .icon-toggle{flex:0 0 auto;}
.page-header-card .header-search-input{width:100%;}
@media (max-width: 900px){
  .mini-sidebar{display:none;}
  .modern-content{padding:18px 14px 24px;}
  .page-title{font-size:24px;}
  .page-subtitle{font-size:14px;}
  .page-header-card{padding-bottom:16px;}
}


.topbar-avatar--image{width:36px;height:36px;border-radius:999px;object-fit:cover;border:1px solid var(--line);background:#111827;}
.profile-layout-grid{align-items:start;}
.profile-summary-top{display:flex;gap:18px;align-items:center;flex-wrap:wrap;}
.profile-avatar-wrap{flex:0 0 auto;}
.profile-avatar-image,.profile-avatar-placeholder{width:96px;height:96px;border-radius:24px;display:flex;align-items:center;justify-content:center;overflow:hidden;background:#152033;border:1px solid #2a3650;color:#fff;font-size:36px;font-weight:800;}
.profile-avatar-image{object-fit:cover;}
.profile-meta-stack{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px;}
.profile-form-grid{align-items:start;}
@media (max-width: 760px){.profile-avatar-image,.profile-avatar-placeholder{width:82px;height:82px;border-radius:20px;font-size:30px;}}