/* ============================================================
   TokenWise — Learn AI, token by token
   Design system
   ============================================================ */

:root {
  --bg: #0b0e14;
  --bg-soft: #11151f;
  --panel: #161b28;
  --panel-2: #1c2233;
  --border: #313d5c;
  --outline: rgba(255, 255, 255, 0.16);
  --text: #e8ecf5;
  --text-dim: #9aa5bc;
  --text-faint: #67718a;
  --accent: #6c8cff;
  --accent-2: #9d6cff;
  --accent-3: #43d6b5;
  --warn: #ffb454;
  --danger: #ff6b81;
  --grad: linear-gradient(120deg, #6c8cff, #9d6cff 55%, #43d6b5);
  --radius: 14px;
  --sidebar-w: 248px;
  --maxw: 980px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  font-size: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}

::selection { background: rgba(108, 140, 255, 0.35); }

/* ---------- Scrollbars: slim, dark, unobtrusive ---------- */

html { scrollbar-width: thin; scrollbar-color: #2c3650 transparent; }
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #2c3650; border-radius: 99px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: #3c4a6b; }

/* sidebar scrolls, but shows no scrollbar at all */
.sidebar { scrollbar-width: none; }
.sidebar::-webkit-scrollbar { display: none; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Layout ---------- */

.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-soft);
  border-right: 1px solid var(--border);
  padding: 22px 14px;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  overflow-y: auto;
  z-index: 50;
  transition: transform 0.25s ease;
}
body.nosb .sidebar { transform: translateX(-100%); }

.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 18px 40px 90px;
  transition: margin-left 0.25s ease;
}
body.nosb .main { margin-left: 0; }

/* ---------- Top bar ---------- */

.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 12px;
  padding: 12px 0 14px;
  margin-bottom: 16px;
  background: linear-gradient(var(--bg) 78%, transparent);
}
.sb-toggle {
  width: 38px; height: 38px; flex-shrink: 0;
  border-radius: 10px; border: 1px solid var(--outline);
  background: var(--panel); color: var(--text);
  cursor: pointer; font-size: 1rem;
  display: grid; place-items: center;
  transition: border-color 0.15s, background 0.15s;
}
.sb-toggle:hover { border-color: var(--accent); background: var(--panel-2); }
.topbar-chips {
  display: flex; gap: 8px; align-items: center;
  overflow-x: auto; scrollbar-width: none; flex: 1;
}
.topbar-chips::-webkit-scrollbar { display: none; }
.topbar-label {
  font-size: 0.66rem; letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--text-faint); flex-shrink: 0; padding-right: 2px;
}
.tool-chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 4px 12px 4px 5px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--panel);
  font-size: 0.78rem; font-weight: 600; color: var(--text-dim);
  white-space: nowrap; flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s, transform 0.1s;
}
.tool-chip:hover { border-color: var(--accent); color: var(--text); text-decoration: none; transform: translateY(-1px); }
.tc-mark {
  width: 22px; height: 22px; border-radius: 7px;
  display: grid; place-items: center;
  font-size: 0.7rem; font-weight: 800; color: #fff;
  font-family: "Segoe UI", system-ui, sans-serif;
}
.tc-mark svg { width: 13px; height: 13px; display: block; }

.container { max-width: var(--maxw); margin: 0 auto; }

/* ---------- Sidebar ---------- */

.logo {
  display: flex; align-items: center; gap: 10px;
  padding: 4px 10px 18px;
}
.logo-mark {
  width: 34px; height: 34px; flex-shrink: 0;
  display: grid; place-items: center;
  filter: drop-shadow(0 2px 8px rgba(108, 140, 255, 0.35));
}
.logo-mark svg { display: block; }
.logo-name { font-weight: 700; font-size: 1.05rem; letter-spacing: 0.2px; }
.logo-name span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.logo-sub { font-size: 0.66rem; color: var(--text-faint); letter-spacing: 0.8px; text-transform: uppercase; }

.nav-group { margin-top: 16px; }
.nav-label {
  font-size: 0.68rem; letter-spacing: 1.4px; text-transform: uppercase;
  color: var(--text-faint); padding: 0 10px 6px;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px; border-radius: 9px;
  color: var(--text-dim); font-size: 0.92rem;
  cursor: pointer; transition: background 0.15s, color 0.15s;
  text-decoration: none;
}
.nav-item:hover { background: var(--panel); color: var(--text); text-decoration: none; }
.nav-item.active { background: var(--panel-2); color: var(--text); font-weight: 600; }
.nav-item .ico { width: 22px; text-align: center; }

.sidebar-foot {
  margin-top: 26px; padding: 12px 10px; border-top: 1px solid var(--border);
  font-size: 0.75rem; color: var(--text-faint);
}

/* ---------- Generic components ---------- */

.eyebrow {
  font-size: 0.72rem; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent); font-weight: 700; margin-bottom: 8px;
}
h1.page-title { font-size: 2rem; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 8px; }
.page-desc { color: var(--text-dim); max-width: 680px; margin-bottom: 28px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.card + .card { margin-top: 16px; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.pill {
  display: inline-block; padding: 3px 11px; border-radius: 999px;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.4px;
  border: 1px solid var(--border); color: var(--text-dim);
}
.pill.beginner { color: #43d6b5; border-color: rgba(67, 214, 181, 0.4); background: rgba(67, 214, 181, 0.08); }
.pill.intermediate { color: #6c8cff; border-color: rgba(108, 140, 255, 0.4); background: rgba(108, 140, 255, 0.08); }
.pill.advanced { color: #9d6cff; border-color: rgba(157, 108, 255, 0.4); background: rgba(157, 108, 255, 0.08); }
.pill.all { color: var(--warn); border-color: rgba(255, 180, 84, 0.4); background: rgba(255, 180, 84, 0.08); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: #0b0e14;
  border: 1px solid var(--outline); border-radius: 10px;
  padding: 10px 18px; font-size: 0.9rem; font-weight: 700;
  cursor: pointer; transition: filter 0.15s, transform 0.1s;
  font-family: inherit;
}
.btn:hover { filter: brightness(1.12); text-decoration: none; }
.btn:active { transform: scale(0.98); }
.btn.ghost {
  background: transparent; color: var(--text); border: 1px solid var(--outline);
}
.btn.ghost:hover { background: var(--panel-2); }
.btn.small { padding: 6px 13px; font-size: 0.8rem; }
.btn.grad { background: var(--grad); color: #fff; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.progress-track {
  height: 7px; border-radius: 99px; background: var(--panel-2);
  overflow: hidden;
}
.progress-fill { height: 100%; background: var(--grad); border-radius: 99px; transition: width 0.4s ease; }

.tag {
  display: inline-block; font-size: 0.7rem; padding: 2px 9px;
  border-radius: 6px; background: var(--panel-2); color: var(--text-dim);
  margin-right: 6px;
}

hr.sep { border: none; border-top: 1px solid var(--border); margin: 22px 0; }

/* ---------- Daily Brief ---------- */

.brief-hero {
  background: radial-gradient(1200px 400px at 20% -10%, rgba(108, 140, 255, 0.18), transparent 60%),
              radial-gradient(900px 400px at 90% 0%, rgba(67, 214, 181, 0.12), transparent 60%),
              var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 36px 38px;
  margin-bottom: 26px;
  position: relative;
  overflow: hidden;
}
.brief-date {
  font-size: 0.78rem; letter-spacing: 2px; text-transform: uppercase;
  color: var(--accent-3); font-weight: 700; margin-bottom: 10px;
}
.brief-title { font-size: 2.1rem; font-weight: 800; letter-spacing: -0.7px; line-height: 1.2; margin-bottom: 12px; }
.brief-summary { color: var(--text-dim); font-size: 1.02rem; max-width: 720px; }

.story {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 20px;
  margin-bottom: 26px;
}
.story:nth-child(3n+2) { border-left-color: var(--accent-2); }
.story:nth-child(3n) { border-left-color: var(--accent-3); }
.story h3 { font-size: 1.15rem; margin-bottom: 6px; letter-spacing: -0.2px; }
.story .story-body { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 8px; }
.story .why {
  background: var(--panel-2); border-radius: 10px;
  padding: 10px 14px; font-size: 0.88rem; margin: 10px 0;
}
.story .why b { color: var(--accent-3); }
.story .src { font-size: 0.8rem; color: var(--text-faint); }
.story .src a { color: var(--text-faint); text-decoration: underline; }
.story .src a:hover { color: var(--accent); }

.term-box {
  background: linear-gradient(120deg, rgba(108, 140, 255, 0.1), rgba(157, 108, 255, 0.08));
  border: 1px solid rgba(108, 140, 255, 0.3);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.term-box .term { font-size: 1.1rem; font-weight: 800; margin-bottom: 4px; }

.archive-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 13px 4px; border-bottom: 1px solid var(--border);
  cursor: pointer; color: var(--text-dim);
}
.archive-item:hover { color: var(--text); }
.archive-item:last-child { border-bottom: none; }

/* ---------- Courses ---------- */

.course-card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  cursor: pointer; transition: transform 0.15s, border-color 0.15s;
  display: flex; flex-direction: column; gap: 10px;
}
.course-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.course-ico { font-size: 1.9rem; }
.course-card h3 { font-size: 1.08rem; letter-spacing: -0.2px; }
.course-card p { color: var(--text-dim); font-size: 0.87rem; flex: 1; }
.course-meta { display: flex; align-items: center; justify-content: space-between; font-size: 0.78rem; color: var(--text-faint); }

.lesson-row {
  display: flex; align-items: center; gap: 14px;
  padding: 15px 18px; border: 1px solid var(--border);
  border-radius: 12px; margin-bottom: 10px;
  cursor: pointer; transition: border-color 0.15s, background 0.15s;
  background: var(--panel);
}
.lesson-row:hover { border-color: var(--accent); background: var(--panel-2); }
.lesson-num {
  width: 30px; height: 30px; border-radius: 8px; flex-shrink: 0;
  display: grid; place-items: center;
  background: var(--panel-2); font-size: 0.8rem; font-weight: 700; color: var(--text-dim);
}
.lesson-row.done .lesson-num { background: rgba(67, 214, 181, 0.15); color: var(--accent-3); }
.lesson-row .lt { flex: 1; }
.lesson-row .lt b { font-size: 0.95rem; }
.lesson-row .lt small { display: block; color: var(--text-faint); font-size: 0.77rem; }

.lesson-content { font-size: 0.97rem; }
.lesson-content h2 { font-size: 1.35rem; margin: 26px 0 10px; letter-spacing: -0.3px; }
.lesson-content h3 { font-size: 1.08rem; margin: 22px 0 8px; color: var(--accent); }
.lesson-content p { margin-bottom: 14px; color: #c9d2e3; }
.lesson-content ul, .lesson-content ol { margin: 0 0 14px 22px; color: #c9d2e3; }
.lesson-content li { margin-bottom: 6px; }
.lesson-content code {
  background: var(--panel-2); padding: 2px 7px; border-radius: 6px;
  font-family: Consolas, "Cascadia Code", monospace; font-size: 0.85em; color: #a8c3ff;
}
.lesson-content pre {
  background: #0d1119; border: 1px solid var(--border); border-radius: 10px;
  padding: 16px 18px; overflow-x: auto; margin-bottom: 16px;
}
.lesson-content pre code { background: none; padding: 0; font-size: 0.83rem; line-height: 1.6; }
.lesson-content blockquote {
  border-left: 3px solid var(--accent-3); padding: 8px 16px; margin-bottom: 14px;
  background: rgba(67, 214, 181, 0.06); border-radius: 0 10px 10px 0; color: var(--text-dim);
}
.keypoints {
  background: var(--panel-2); border-radius: 12px; padding: 18px 22px; margin: 20px 0;
}
.keypoints .kp-title { font-weight: 800; font-size: 0.8rem; letter-spacing: 1.5px; text-transform: uppercase; color: var(--accent-3); margin-bottom: 8px; }

.resource-link {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; border: 1px solid var(--border); border-radius: 10px;
  margin-bottom: 8px; color: var(--text); background: var(--panel);
}
.resource-link:hover { border-color: var(--accent); text-decoration: none; }
.resource-link .r-ico { font-size: 1.2rem; }
.resource-link .r-type { font-size: 0.7rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 1px; }

.lesson-nav { display: flex; justify-content: space-between; margin-top: 30px; gap: 12px; }

/* ---------- Flashcards ---------- */

.flash-stage { perspective: 1400px; margin: 26px auto; max-width: 620px; }
.flashcard {
  position: relative; width: 100%; height: 320px;
  transform-style: preserve-3d; transition: transform 0.55s cubic-bezier(0.4, 0.1, 0.2, 1);
  cursor: pointer;
}
.flashcard.flipped { transform: rotateY(180deg); }
.flash-face {
  position: absolute; inset: 0; backface-visibility: hidden;
  border-radius: 18px; border: 1px solid var(--border);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 34px; text-align: center; gap: 12px;
}
.flash-front { background: var(--panel); }
.flash-back { background: var(--panel-2); transform: rotateY(180deg); }
.flash-face .f-label { font-size: 0.68rem; letter-spacing: 2px; text-transform: uppercase; color: var(--text-faint); }
.flash-face .f-text { font-size: 1.25rem; font-weight: 600; line-height: 1.5; }
.flash-back .f-text { font-size: 1.02rem; font-weight: 400; color: #c9d2e3; }
.flash-controls { display: flex; justify-content: center; gap: 12px; margin-top: 18px; flex-wrap: wrap; }
.flash-count { text-align: center; color: var(--text-faint); font-size: 0.85rem; margin-top: 14px; }

.deck-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; cursor: pointer; transition: transform 0.15s, border-color 0.15s;
}
.deck-card:hover { transform: translateY(-3px); border-color: var(--accent-2); }

/* ---------- Quizzes ---------- */

.q-option {
  display: block; width: 100%; text-align: left;
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 18px; margin-bottom: 10px; color: var(--text);
  font-size: 0.95rem; cursor: pointer; font-family: inherit;
  transition: border-color 0.15s, background 0.15s;
}
.q-option:hover:not(:disabled) { border-color: var(--accent); background: var(--panel-2); }
.q-option.correct { border-color: var(--accent-3); background: rgba(67, 214, 181, 0.12); }
.q-option.wrong { border-color: var(--danger); background: rgba(255, 107, 129, 0.1); }
.q-option:disabled { cursor: default; }
.q-explain {
  background: var(--panel-2); border-radius: 10px; padding: 14px 18px;
  font-size: 0.9rem; margin: 14px 0; color: #c9d2e3;
}
.q-explain b { color: var(--accent-3); }

.score-ring {
  width: 150px; height: 150px; border-radius: 50%;
  display: grid; place-items: center; margin: 20px auto;
  background: conic-gradient(var(--accent-3) calc(var(--pct) * 1%), var(--panel-2) 0);
}
.score-inner {
  width: 118px; height: 118px; border-radius: 50%; background: var(--panel);
  display: grid; place-items: center; font-size: 1.6rem; font-weight: 800;
}

/* ---------- Timeline ---------- */

.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: ""; position: absolute; left: 9px; top: 6px; bottom: 6px;
  width: 2px; background: var(--border);
}
.tl-item { position: relative; margin-bottom: 28px; }
.tl-item::before {
  content: ""; position: absolute; left: -31px; top: 7px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 4px rgba(108, 140, 255, 0.18);
}
.tl-item.era-golden::before { background: var(--warn); box-shadow: 0 0 0 4px rgba(255, 180, 84, 0.15); }
.tl-item.era-deep::before { background: var(--accent-2); box-shadow: 0 0 0 4px rgba(157, 108, 255, 0.18); }
.tl-item.era-llm::before { background: var(--accent-3); box-shadow: 0 0 0 4px rgba(67, 214, 181, 0.18); }
.tl-year { font-weight: 800; color: var(--accent); font-size: 0.95rem; }
.tl-item.era-golden .tl-year { color: var(--warn); }
.tl-item.era-deep .tl-year { color: var(--accent-2); }
.tl-item.era-llm .tl-year { color: var(--accent-3); }
.tl-item h4 { margin: 2px 0 4px; font-size: 1.03rem; }
.tl-item p { color: var(--text-dim); font-size: 0.89rem; }

/* ---------- Tutor ---------- */

.chat-box {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  display: flex; flex-direction: column; height: 560px; overflow: hidden;
}
.chat-scroll { flex: 1; overflow-y: auto; padding: 22px; }
.msg { max-width: 82%; margin-bottom: 14px; padding: 12px 16px; border-radius: 14px; font-size: 0.93rem; white-space: pre-wrap; }
.msg.user { background: var(--accent); color: #0b0e14; margin-left: auto; border-bottom-right-radius: 4px; font-weight: 500; }
.msg.ai { background: var(--panel-2); border-bottom-left-radius: 4px; color: #dbe2f0; }
.msg.sys { background: transparent; border: 1px dashed var(--border); color: var(--text-faint); font-size: 0.82rem; max-width: 100%; text-align: center; }
.chat-input-row { display: flex; gap: 10px; padding: 14px; border-top: 1px solid var(--border); }
.chat-input-row textarea {
  flex: 1; resize: none; background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 10px; color: var(--text); padding: 11px 14px; font-family: inherit;
  font-size: 0.92rem; height: 48px;
}
.chat-input-row textarea:focus { outline: none; border-color: var(--accent); }

input.text-input {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px;
  color: var(--text); padding: 10px 14px; font-family: inherit; font-size: 0.9rem; width: 100%;
}
input.text-input:focus { outline: none; border-color: var(--accent); }

/* ---------- Paths ---------- */

.path-step { display: flex; gap: 18px; margin-bottom: 6px; }
.path-line { display: flex; flex-direction: column; align-items: center; }
.path-dot {
  width: 34px; height: 34px; border-radius: 50%; flex-shrink: 0;
  display: grid; place-items: center; font-weight: 800; font-size: 0.85rem;
  background: var(--panel-2); border: 1px solid var(--border);
}
.path-rail { width: 2px; flex: 1; background: var(--border); min-height: 22px; }
.path-body { padding-bottom: 24px; flex: 1; }

/* ---------- Misc ---------- */

.empty-note { text-align: center; color: var(--text-faint); padding: 50px 20px; }
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--panel-2); border: 1px solid var(--accent);
  padding: 11px 22px; border-radius: 999px; font-size: 0.88rem;
  z-index: 200; box-shadow: var(--shadow); animation: toastIn 0.25s ease;
}
@keyframes toastIn { from { opacity: 0; transform: translateX(-50%) translateY(12px); } }

/* ---------- Read aloud ---------- */

.tts-bar {
  position: fixed; bottom: 22px; right: 26px; z-index: 150;
  display: flex; align-items: center; gap: 8px;
  background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 8px 10px;
  box-shadow: var(--shadow);
}
.tts-btn {
  width: 42px; height: 42px; border-radius: 50%;
  border: 1px solid var(--outline); cursor: pointer; font-size: 1.15rem;
  background: var(--grad); color: #fff;
  display: grid; place-items: center;
  transition: filter 0.15s, transform 0.1s;
}
.tts-btn:hover { filter: brightness(1.15); }
.tts-btn:active { transform: scale(0.95); }
.tts-btn.secondary { background: var(--panel); border: 1px solid var(--outline); color: var(--text); font-size: 0.95rem; width: 38px; height: 38px; }
.tts-rate {
  background: var(--panel); border: 1px solid var(--outline); border-radius: 999px;
  color: var(--text-dim); font-size: 0.75rem; font-weight: 700;
  padding: 8px 12px; cursor: pointer; font-family: inherit;
}
.tts-rate:hover { color: var(--text); }
.tts-label {
  font-size: 0.78rem; color: var(--text-dim); padding-right: 4px; max-width: 150px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tts-bar.reading .tts-btn.play { background: var(--danger); }

.howto-steps { counter-reset: step; }
.howto-step {
  display: flex; gap: 14px; padding: 10px 0;
  border-bottom: 1px solid var(--border); font-size: 0.9rem; color: var(--text-dim);
}
.howto-step:last-child { border-bottom: none; }
.howto-step .hs-num {
  counter-increment: step; flex-shrink: 0;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--panel-2); border: 1px solid var(--border);
  display: grid; place-items: center;
  font-size: 0.78rem; font-weight: 800; color: var(--accent);
}
.howto-step b { color: var(--text); }

.stat-row { display: flex; gap: 14px; margin-bottom: 26px; flex-wrap: wrap; }
.stat {
  flex: 1; min-width: 150px; background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px 18px;
}
.stat .s-num { font-size: 1.5rem; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .s-label { font-size: 0.75rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 1px; }

@media (max-width: 900px) {
  .sidebar { position: static; width: 100%; height: auto; border-right: none; border-bottom: 1px solid var(--border); transform: none; }
  body.nosb .sidebar { display: none; transform: none; }
  .layout { flex-direction: column; }
  .main { margin-left: 0; padding: 16px 18px 70px; }
  body.nosb .main { margin-left: 0; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .brief-hero { padding: 26px 22px; }
}