/* =========================================================
   SkoolPress — Frontend Styles
   ========================================================= */

:root {
  --sp-primary:     #6c63ff;
  --sp-primary-h:   #5a52e0;
  --sp-accent:      #00e5a0;
  --sp-danger:      #ff5757;
  --sp-warn:        #ffd166;
  --sp-text:        #1a1d27;
  --sp-text-2:      #5a6478;
  --sp-text-3:      #9aa3b4;
  --sp-bg:          #f5f6fa;
  --sp-surface:     #ffffff;
  --sp-border:      #e4e6f0;
  --sp-radius:      12px;
  --sp-radius-sm:   8px;
  --sp-shadow:      0 2px 12px rgba(0,0,0,0.06);
  --sp-shadow-md:   0 6px 24px rgba(0,0,0,0.10);
  --sp-font:        -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ─── Base ─────────────────────────────────────────────── */
.sp-wrap { font-family: var(--sp-font); color: var(--sp-text); }
.sp-wrap *, .sp-wrap *::before, .sp-wrap *::after { box-sizing: border-box; }
.sp-wrap p { margin: 0 0 0.75em; line-height: 1.65; }

/* ─── Buttons ──────────────────────────────────────────── */
.sp-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px; border-radius: var(--sp-radius-sm);
  font-size: 14px; font-weight: 600; cursor: pointer;
  border: 2px solid transparent; text-decoration: none;
  transition: all 0.18s ease; line-height: 1; white-space: nowrap;
}
.sp-btn:focus-visible { outline: 3px solid var(--sp-primary); outline-offset: 2px; }
.sp-btn-primary  { background: var(--sp-primary); color: #fff; }
.sp-btn-primary:hover { background: var(--sp-primary-h); color: #fff; text-decoration: none; }
.sp-btn-outline  { background: transparent; border-color: var(--sp-border); color: var(--sp-text); }
.sp-btn-outline:hover { border-color: var(--sp-primary); color: var(--sp-primary); text-decoration: none; }
.sp-btn-ghost    { background: transparent; color: var(--sp-text-2); border: none; padding: 6px 12px; }
.sp-btn-ghost:hover { background: var(--sp-bg); color: var(--sp-text); }
.sp-btn-sm       { padding: 6px 14px; font-size: 13px; }
.sp-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ─── Cards ────────────────────────────────────────────── */
.sp-card {
  background: var(--sp-surface); border: 1px solid var(--sp-border);
  border-radius: var(--sp-radius); padding: 20px;
  box-shadow: var(--sp-shadow);
}
.sp-card-title { font-size: 14px; font-weight: 700; color: var(--sp-text); margin: 0 0 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.sp-card-meta  { font-size: 13px; color: var(--sp-text-3); margin-top: 8px; }

/* ─── Avatars ──────────────────────────────────────────── */
.sp-avatar-xs { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.sp-avatar-sm { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.sp-avatar-md { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; }
.sp-avatar-lg { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; display: block; margin: 0 auto 12px; }

/* ─── Badges / Pills ───────────────────────────────────── */
.sp-badge-member  { display: inline-block; background: rgba(108,99,255,0.1); color: var(--sp-primary); font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 20px; }
.sp-privacy-badge { display: inline-block; font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.sp-privacy-public  { background: rgba(0,229,160,0.12); color: #0fa86e; }
.sp-privacy-private { background: rgba(255,209,102,0.12); color: #9a7c00; }
.sp-privacy-secret  { background: rgba(255,87,87,0.12); color: #cc2222; }
.sp-role-badge { display: inline-block; font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 4px; background: var(--sp-bg); color: var(--sp-text-2); }
.sp-role-admin { background: rgba(108,99,255,0.1); color: var(--sp-primary); }
.sp-role-moderator { background: rgba(0,229,160,0.1); color: #0fa86e; }
.sp-you-tag { display: inline-block; background: var(--sp-primary); color: #fff; font-size: 10px; font-weight: 700; padding: 1px 7px; border-radius: 20px; margin-left: 6px; }

/* ─── Empty States ─────────────────────────────────────── */
.sp-empty-state { text-align: center; padding: 60px 20px; color: var(--sp-text-2); }
.sp-empty-icon  { font-size: 48px; margin-bottom: 16px; }
.sp-empty-state h3 { font-size: 20px; font-weight: 700; color: var(--sp-text); margin-bottom: 8px; }

/* ─── Progress Bars ────────────────────────────────────── */
.sp-level-bar { background: var(--sp-border); border-radius: 20px; height: 6px; overflow: hidden; }
.sp-level-bar-fill { height: 100%; background: linear-gradient(90deg, var(--sp-primary), var(--sp-accent)); border-radius: 20px; transition: width 0.4s ease; }
.sp-level-bar-label { font-size: 12px; color: var(--sp-text-3); margin-top: 5px; }
.sp-level-bar-wrap { margin-top: 12px; }

/* ─── Tabs ─────────────────────────────────────────────── */
.sp-tabs { display: flex; border-bottom: 2px solid var(--sp-border); margin: 0; gap: 0; }
.sp-tab { padding: 14px 20px; font-size: 14px; font-weight: 600; color: var(--sp-text-2); background: none; border: none; border-bottom: 2px solid transparent; cursor: pointer; transition: all 0.18s; margin-bottom: -2px; }
.sp-tab:hover { color: var(--sp-text); }
.sp-tab.active { color: var(--sp-primary); border-bottom-color: var(--sp-primary); }
.sp-tab-panel { display: none; padding: 24px 0; }
.sp-tab-panel.active { display: block; }

/* ─── Group Header ─────────────────────────────────────── */
.sp-group-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background-size: cover; background-position: center;
  border-radius: var(--sp-radius); overflow: hidden; margin-bottom: 0;
  position: relative;
}
.sp-group-header::before { content: ''; position: absolute; inset: 0; background: rgba(0,0,0,0.45); }
.sp-group-header-inner { position: relative; display: flex; align-items: flex-end; gap: 20px; padding: 32px 24px 24px; flex-wrap: wrap; }
.sp-group-avatar { width: 80px; height: 80px; border-radius: var(--sp-radius-sm); border: 3px solid rgba(255,255,255,0.3); object-fit: cover; }
.sp-group-meta { flex: 1; min-width: 200px; }
.sp-group-name { font-size: 28px; font-weight: 800; color: #fff; margin: 0 0 8px; }
.sp-group-stats { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 8px; }
.sp-group-stats span { font-size: 13px; color: rgba(255,255,255,0.85); font-weight: 500; }
.sp-group-desc { font-size: 14px; color: rgba(255,255,255,0.75); margin: 0; }
.sp-group-actions { margin-left: auto; }

/* ─── Feed Layout ──────────────────────────────────────── */
.sp-feed-layout { display: grid; grid-template-columns: 1fr 300px; gap: 24px; align-items: start; }
@media (max-width: 768px) { .sp-feed-layout { grid-template-columns: 1fr; } }
.sp-feed-sidebar { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 24px; }

/* ─── Composer ─────────────────────────────────────────── */
.sp-composer { display: flex; gap: 12px; background: var(--sp-surface); border: 1px solid var(--sp-border); border-radius: var(--sp-radius); padding: 16px; margin-bottom: 16px; box-shadow: var(--sp-shadow); }
.sp-composer-inner { flex: 1; }
.sp-post-textarea { width: 100%; padding: 10px 14px; border: 1px solid var(--sp-border); border-radius: var(--sp-radius-sm); font-family: var(--sp-font); font-size: 14px; color: var(--sp-text); resize: vertical; min-height: 72px; transition: border-color 0.15s; background: var(--sp-bg); }
.sp-post-textarea:focus { outline: none; border-color: var(--sp-primary); background: #fff; }
.sp-composer-actions { display: flex; align-items: center; justify-content: space-between; margin-top: 10px; }
.sp-composer-media { display: flex; gap: 8px; }

/* ─── Post Cards ───────────────────────────────────────── */
.sp-post-card {
  background: var(--sp-surface); border: 1px solid var(--sp-border);
  border-radius: var(--sp-radius); padding: 20px; margin-bottom: 12px;
  box-shadow: var(--sp-shadow); transition: box-shadow 0.2s;
  animation: sp-fadein 0.3s ease;
}
.sp-post-card:hover { box-shadow: var(--sp-shadow-md); }
.sp-post-card.sp-pinned { border-left: 3px solid var(--sp-warn); }
.sp-pin-label { font-size: 11px; font-weight: 700; color: var(--sp-warn); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 12px; }

.sp-post-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.sp-post-author-meta { flex: 1; }
.sp-post-author { display: block; font-weight: 700; font-size: 14px; color: var(--sp-text); }
.sp-post-level  { font-size: 12px; color: var(--sp-text-3); }
.sp-post-time   { font-size: 12px; color: var(--sp-text-3); white-space: nowrap; }

.sp-post-menu { position: relative; margin-left: auto; }
.sp-post-menu-btn { background: none; border: none; font-size: 18px; cursor: pointer; color: var(--sp-text-3); padding: 4px 8px; border-radius: 6px; }
.sp-post-menu-btn:hover { background: var(--sp-bg); color: var(--sp-text); }
.sp-post-dropdown { position: absolute; top: calc(100% + 4px); right: 0; background: #fff; border: 1px solid var(--sp-border); border-radius: var(--sp-radius-sm); box-shadow: var(--sp-shadow-md); min-width: 130px; display: none; z-index: 100; }
.sp-post-dropdown button { display: block; width: 100%; padding: 10px 16px; text-align: left; font-size: 13px; background: none; border: none; cursor: pointer; color: var(--sp-danger); }
.sp-post-dropdown button:hover { background: var(--sp-bg); }
.sp-post-menu:hover .sp-post-dropdown { display: block; }

.sp-post-content { font-size: 15px; line-height: 1.7; color: var(--sp-text); margin-bottom: 14px; }
.sp-post-media { border-radius: var(--sp-radius-sm); overflow: hidden; margin-bottom: 14px; }
.sp-post-media img { width: 100%; display: block; max-height: 400px; object-fit: cover; }

.sp-post-footer { display: flex; gap: 16px; padding-top: 12px; border-top: 1px solid var(--sp-border); }
.sp-like-btn, .sp-comment-toggle-btn {
  display: flex; align-items: center; gap: 6px;
  background: none; border: none; cursor: pointer;
  font-size: 13px; color: var(--sp-text-2); font-weight: 500;
  padding: 5px 10px; border-radius: 6px; transition: all 0.15s;
}
.sp-like-btn:hover { background: rgba(255,87,87,0.08); color: var(--sp-danger); }
.sp-like-btn.liked { color: var(--sp-danger); }
.sp-like-btn.liked .sp-like-icon { transform: scale(1.2); }
.sp-like-icon { transition: transform 0.2s ease; }
.sp-comment-toggle-btn:hover { background: var(--sp-bg); color: var(--sp-text); }

/* ─── Comments ─────────────────────────────────────────── */
.sp-comments-panel { border-top: 1px solid var(--sp-border); margin-top: 12px; padding-top: 16px; }
.sp-comments-list .sp-post-card { background: var(--sp-bg); box-shadow: none; border: none; padding: 14px; margin-bottom: 8px; }
.sp-reply-form { display: flex; gap: 10px; align-items: flex-start; margin-top: 12px; }
.sp-reply-form textarea { flex: 1; padding: 8px 12px; border: 1px solid var(--sp-border); border-radius: var(--sp-radius-sm); font-family: var(--sp-font); font-size: 13px; resize: none; }
.sp-reply-form textarea:focus { outline: none; border-color: var(--sp-primary); }

/* ─── User Sidebar Card ────────────────────────────────── */
.sp-user-card { text-align: center; }
.sp-user-name  { font-size: 16px; font-weight: 700; color: var(--sp-text); margin-bottom: 4px; }
.sp-user-level { font-size: 13px; color: var(--sp-text-2); margin-bottom: 12px; }
.sp-points-wrap { background: var(--sp-bg); border-radius: var(--sp-radius-sm); padding: 12px; margin: 12px 0; }
.sp-points-count { font-size: 28px; font-weight: 800; color: var(--sp-primary); }
.sp-points-label { font-size: 13px; color: var(--sp-text-3); display: block; }

/* ─── Member List ──────────────────────────────────────── */
.sp-member-avatars { display: flex; flex-wrap: wrap; gap: 6px; }
.sp-member-list { display: flex; flex-direction: column; gap: 2px; }
.sp-member-row { display: flex; align-items: center; gap: 12px; padding: 12px; border-radius: var(--sp-radius-sm); transition: background 0.15s; }
.sp-member-row:hover { background: var(--sp-bg); }
.sp-member-info { flex: 1; }
.sp-member-name  { display: block; font-weight: 600; font-size: 14px; color: var(--sp-text); }
.sp-member-level { font-size: 12px; color: var(--sp-text-3); }

/* ─── Group Grid ───────────────────────────────────────── */
.sp-group-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.sp-group-card { background: var(--sp-surface); border: 1px solid var(--sp-border); border-radius: var(--sp-radius); overflow: hidden; box-shadow: var(--sp-shadow); transition: transform 0.2s, box-shadow 0.2s; }
.sp-group-card:hover { transform: translateY(-2px); box-shadow: var(--sp-shadow-md); }
.sp-group-card-cover { height: 120px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); background-size: cover; background-position: center; }
.sp-group-card-cover-default { background: linear-gradient(135deg, var(--sp-primary) 0%, var(--sp-accent) 100%); }
.sp-group-card-body { padding: 16px; }
.sp-group-card-name { font-size: 17px; font-weight: 700; margin: 0 0 6px; color: var(--sp-text); }
.sp-group-card-desc { font-size: 13px; color: var(--sp-text-2); margin-bottom: 10px; }
.sp-group-card-stats { display: flex; gap: 12px; font-size: 13px; color: var(--sp-text-3); margin-bottom: 12px; }
.sp-group-card-actions { display: flex; gap: 8px; }

/* ─── Course Grid ──────────────────────────────────────── */
.sp-course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.sp-course-card { background: var(--sp-surface); border: 1px solid var(--sp-border); border-radius: var(--sp-radius); overflow: hidden; text-decoration: none; box-shadow: var(--sp-shadow); transition: transform 0.2s, box-shadow 0.2s; display: flex; flex-direction: column; }
.sp-course-card:hover { transform: translateY(-2px); box-shadow: var(--sp-shadow-md); text-decoration: none; }
.sp-course-thumb { overflow: hidden; height: 140px; }
.sp-course-thumb img { width: 100%; height: 100%; object-fit: cover; }
.sp-course-body { padding: 16px; flex: 1; display: flex; flex-direction: column; }
.sp-course-title { font-size: 16px; font-weight: 700; color: var(--sp-text); margin: 0 0 6px; }
.sp-course-excerpt { font-size: 13px; color: var(--sp-text-2); flex: 1; margin-bottom: 12px; }
.sp-course-progress { margin-top: auto; }
.sp-course-progress span { font-size: 12px; color: var(--sp-text-3); display: block; margin-top: 4px; }

/* ─── Leaderboard ──────────────────────────────────────── */
.sp-leaderboard { display: flex; flex-direction: column; gap: 4px; }
.sp-lb-row { display: flex; align-items: center; gap: 14px; padding: 12px 16px; border-radius: var(--sp-radius-sm); transition: background 0.15s; }
.sp-lb-row:hover { background: var(--sp-bg); }
.sp-lb-row--me { background: rgba(108,99,255,0.06); border: 1px solid rgba(108,99,255,0.2); }
.sp-lb-row--me:hover { background: rgba(108,99,255,0.09); }
.sp-lb-rank { width: 36px; text-align: center; font-size: 18px; font-weight: 700; color: var(--sp-text); flex-shrink: 0; }
.sp-lb-info { flex: 1; }
.sp-lb-name { display: block; font-weight: 600; font-size: 14px; color: var(--sp-text); }
.sp-lb-level { font-size: 12px; color: var(--sp-text-3); }
.sp-lb-right { text-align: right; }
.sp-lb-points { display: block; font-weight: 700; font-size: 15px; color: var(--sp-primary); }
.sp-lb-badges { font-size: 12px; color: var(--sp-text-3); }

/* ─── Lesson Layout ────────────────────────────────────── */
.sp-lesson-layout { display: grid; grid-template-columns: 300px 1fr; min-height: 80vh; }
@media (max-width: 900px) { .sp-lesson-layout { grid-template-columns: 1fr; } }

.sp-lesson-sidebar { background: var(--sp-surface); border-right: 1px solid var(--sp-border); padding: 0; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.sp-lesson-sidebar-header { padding: 20px; border-bottom: 1px solid var(--sp-border); }
.sp-back-link { font-size: 13px; color: var(--sp-text-2); text-decoration: none; display: block; margin-bottom: 10px; }
.sp-back-link:hover { color: var(--sp-primary); }
.sp-lesson-sidebar-header h3 { font-size: 15px; font-weight: 700; color: var(--sp-text); margin: 0 0 12px; }
.sp-lesson-progress { display: flex; align-items: center; gap: 10px; }
.sp-lesson-progress .sp-level-bar { flex: 1; }
.sp-lesson-progress span { font-size: 12px; color: var(--sp-text-3); white-space: nowrap; }

.sp-curriculum-nav { padding: 12px 0; }
.sp-module { margin-bottom: 8px; }
.sp-module-name { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--sp-text-3); padding: 10px 20px 6px; }
.sp-curriculum-item { display: flex; align-items: center; gap: 10px; padding: 10px 20px; font-size: 13px; color: var(--sp-text-2); text-decoration: none; transition: background 0.15s; }
.sp-curriculum-item:hover { background: var(--sp-bg); color: var(--sp-text); text-decoration: none; }
.sp-curriculum-item.sp-current { background: rgba(108,99,255,0.08); color: var(--sp-primary); font-weight: 600; }
.sp-curriculum-item.sp-completed { color: var(--sp-text-3); }
.sp-lesson-check { font-size: 14px; flex-shrink: 0; color: var(--sp-accent); }
.sp-lesson-duration { margin-left: auto; font-size: 11px; color: var(--sp-text-3); }

.sp-lesson-main { padding: 40px; max-width: 820px; }
.sp-lesson-header { margin-bottom: 28px; }
.sp-lesson-module-label { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--sp-primary); margin-bottom: 8px; }
.sp-lesson-title { font-size: 30px; font-weight: 800; color: var(--sp-text); margin: 0 0 16px; }
.sp-lesson-header-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.sp-complete-btn { background: var(--sp-primary); color: #fff; border: none; padding: 10px 24px; border-radius: var(--sp-radius-sm); font-weight: 600; font-size: 14px; cursor: pointer; transition: all 0.2s; }
.sp-complete-btn:hover:not(:disabled) { background: var(--sp-primary-h); }
.sp-complete-btn.sp-done { background: var(--sp-accent); color: #1a1d27; }
.sp-points-indicator { font-size: 14px; font-weight: 600; color: var(--sp-text-2); background: var(--sp-bg); padding: 8px 14px; border-radius: 20px; }

.sp-lesson-video { margin-bottom: 28px; border-radius: var(--sp-radius); overflow: hidden; }
.sp-lesson-video iframe, .sp-lesson-video video { width: 100%; aspect-ratio: 16/9; display: block; }
.sp-lesson-content { font-size: 16px; line-height: 1.8; color: var(--sp-text); }
.sp-lesson-content h2 { font-size: 22px; font-weight: 700; margin: 1.5em 0 0.6em; }
.sp-lesson-content h3 { font-size: 18px; font-weight: 700; margin: 1.3em 0 0.5em; }
.sp-lesson-content img { max-width: 100%; border-radius: var(--sp-radius-sm); }
.sp-lesson-content blockquote { border-left: 3px solid var(--sp-primary); padding-left: 18px; color: var(--sp-text-2); font-style: italic; margin: 1.5em 0; }
.sp-lesson-content code { background: var(--sp-bg); border: 1px solid var(--sp-border); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
.sp-lesson-content pre { background: #1a1d27; color: #c9d1e0; padding: 20px; border-radius: var(--sp-radius-sm); overflow-x: auto; }

.sp-lesson-nav { display: flex; justify-content: space-between; align-items: center; padding-top: 32px; margin-top: 40px; border-top: 1px solid var(--sp-border); }

/* ─── Locked Content ───────────────────────────────────── */
.sp-locked-content { text-align: center; padding: 80px 24px; }
.sp-lock-icon { font-size: 56px; margin-bottom: 20px; }
.sp-locked-content h3 { font-size: 24px; font-weight: 700; color: var(--sp-text); margin-bottom: 12px; }
.sp-locked-content p { color: var(--sp-text-2); max-width: 400px; margin: 0 auto 24px; }

/* ─── Notifications ────────────────────────────────────── */
.sp-notification-bell { position: relative; display: inline-block; cursor: pointer; }
.sp-notification-badge { position: absolute; top: -6px; right: -6px; background: var(--sp-danger); color: #fff; font-size: 10px; font-weight: 700; min-width: 18px; height: 18px; border-radius: 9px; display: flex; align-items: center; justify-content: center; padding: 0 4px; }
.sp-notification-panel { position: absolute; top: calc(100% + 8px); right: 0; width: 340px; background: var(--sp-surface); border: 1px solid var(--sp-border); border-radius: var(--sp-radius); box-shadow: var(--sp-shadow-md); z-index: 200; }
.sp-notification-item { padding: 14px 16px; border-bottom: 1px solid var(--sp-border); font-size: 13px; color: var(--sp-text-2); }
.sp-notification-item.unread { background: rgba(108,99,255,0.04); color: var(--sp-text); font-weight: 500; }
.sp-notification-item:last-child { border-bottom: none; }
.sp-notification-time { font-size: 11px; color: var(--sp-text-3); display: block; margin-top: 3px; }

/* ─── Page Header ──────────────────────────────────────── */
.sp-page-header { margin-bottom: 28px; }
.sp-page-header h2 { font-size: 28px; font-weight: 800; color: var(--sp-text); margin: 0 0 6px; }
.sp-page-header p { color: var(--sp-text-2); font-size: 15px; margin: 0; }

/* ─── Load More ────────────────────────────────────────── */
.sp-load-more { width: 100%; margin-top: 8px; text-align: center; justify-content: center; }

/* ─── Toast Notifications ──────────────────────────────── */
.sp-toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.sp-toast { background: var(--sp-text); color: #fff; padding: 12px 20px; border-radius: var(--sp-radius-sm); font-size: 14px; font-weight: 500; box-shadow: var(--sp-shadow-md); animation: sp-toast-in 0.3s ease; max-width: 320px; }
.sp-toast.success { background: #1a7a50; }
.sp-toast.error   { background: #b52222; }
.sp-toast.info    { background: var(--sp-primary); }

/* ─── Animations ───────────────────────────────────────── */
@keyframes sp-fadein { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes sp-toast-in { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }

/* ─── Responsive ───────────────────────────────────────── */
@media (max-width: 600px) {
  .sp-group-header-inner { flex-direction: column; align-items: flex-start; }
  .sp-lesson-main { padding: 20px; }
  .sp-lesson-title { font-size: 22px; }
  .sp-tabs { overflow-x: auto; scrollbar-width: none; }
  .sp-tabs::-webkit-scrollbar { display: none; }
}