@import"https://fonts.googleapis.com/css2?family=Manrope:wght@500;600;700;800&family=Noto+Sans+SC:wght@400;500;600;700&display=swap";._layout_43c8p_1{min-height:100vh;background:radial-gradient(circle at top left,var(--accent-soft) 0%,transparent 25%),radial-gradient(circle at top right,var(--brand-soft) 0%,transparent 24%),var(--bg-base)}._header_43c8p_9{position:sticky;top:0;z-index:30;display:grid;grid-template-columns:260px 1fr auto;align-items:center;gap:20px;padding:18px 28px;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:color-mix(in srgb,var(--bg-elevated) 82%,transparent);border-bottom:1px solid var(--border-subtle)}._brandBlock_43c8p_23{display:flex;align-items:center;gap:14px}._brandMark_43c8p_29{width:46px;height:46px;display:flex;align-items:center;justify-content:center;border-radius:16px;font-size:20px;color:var(--brand-strong);background:linear-gradient(145deg,var(--brand-soft),transparent);border:1px solid var(--border-default);box-shadow:var(--shadow-md)}._brandTitle_43c8p_43{font-family:var(--font-heading);font-size:18px;font-weight:700;letter-spacing:-.03em;color:var(--text-primary)}._brandMeta_43c8p_51{color:var(--text-tertiary);font-size:12px;letter-spacing:.18em;text-transform:uppercase}._topNav_43c8p_58{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}._topNavItem_43c8p_65{min-height:44px;padding:10px 14px;display:inline-flex;align-items:center;gap:8px;border:1px solid transparent;border-radius:14px;background:transparent;color:var(--text-secondary);cursor:pointer;font:inherit;transition:all .2s ease}._topNavItem_43c8p_65:hover{color:var(--text-primary);background:var(--bg-surface-hover);border-color:var(--border-subtle)}._topNavItemActive_43c8p_86{color:var(--brand-strong);background:linear-gradient(135deg,var(--brand-soft),transparent);border-color:color-mix(in srgb,var(--brand-strong) 25%,transparent)}._headerActions_43c8p_92{display:flex;align-items:center;gap:12px}._headerButton_43c8p_98{color:var(--text-secondary)!important;border-radius:12px!important}._userButton_43c8p_103{display:flex;align-items:center;gap:12px;padding:6px 8px;border:1px solid var(--border-subtle);border-radius:16px;background:var(--bg-surface);cursor:pointer}._userAvatar_43c8p_114{background:linear-gradient(135deg,var(--brand-strong),var(--accent-strong))!important}._userMeta_43c8p_118{display:flex;flex-direction:column;align-items:flex-start;min-width:0}._userName_43c8p_125{color:var(--text-primary)!important;font-weight:600}._userSubtle_43c8p_130{color:var(--text-tertiary)!important;font-size:12px}._body_43c8p_135{display:grid;grid-template-columns:312px minmax(0,1fr);gap:24px;padding:24px 28px 32px}._outlinePanel_43c8p_142{position:sticky;top:98px;align-self:start;height:950px;padding:20px;overflow:auto;border:1px solid var(--border-subtle);border-radius:24px;background:color-mix(in srgb,var(--bg-surface) 92%,transparent);box-shadow:var(--shadow-lg);scrollbar-width:none;-ms-overflow-style:none;-webkit-mask-image:linear-gradient(to bottom,transparent 0,black 18px,black calc(100% - 18px),transparent 100%);mask-image:linear-gradient(to bottom,transparent 0,black 18px,black calc(100% - 18px),transparent 100%)}._outlinePanel_43c8p_142::-webkit-scrollbar{width:0;height:0}._outlineHeader_43c8p_164{display:flex;flex-direction:column;gap:12px;margin-bottom:16px}._outlineEyebrow_43c8p_171{color:var(--text-tertiary)!important;font-size:12px;letter-spacing:.14em;text-transform:uppercase}._courseSelect_43c8p_178 .ant-select-selector{min-height:48px!important;border-radius:14px!important}._chapterList_43c8p_183{display:flex;flex-direction:column;gap:12px}._chapterCard_43c8p_189{padding:8px 2px 10px;border-radius:18px;background:linear-gradient(180deg,color-mix(in srgb,var(--bg-elevated) 38%,transparent),transparent)}._chapterHeading_43c8p_195{display:flex;align-items:center;gap:10px;margin-bottom:8px;padding:10px 12px;border-radius:14px;background:linear-gradient(135deg,color-mix(in srgb,var(--brand-soft) 18%,transparent),transparent)}._chapterIndex_43c8p_205,._lessonIndex_43c8p_206{width:28px;height:28px;flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;background:color-mix(in srgb,var(--bg-surface-hover) 90%,transparent);font-size:12px;color:var(--text-secondary)}._chapterIndex_43c8p_205{width:32px;height:32px;border-radius:12px;background:linear-gradient(180deg,color-mix(in srgb,var(--brand-strong) 26%,transparent),color-mix(in srgb,var(--brand-soft) 62%,transparent));color:color-mix(in srgb,var(--brand-strong) 92%,white 12%);font-weight:700;box-shadow:inset 0 1px #ffffff14}._lessonIndex_43c8p_206{background:color-mix(in srgb,var(--bg-surface-hover) 90%,transparent);color:var(--text-tertiary)}._chapterTitle_43c8p_234{color:var(--text-primary);font-weight:600;line-height:1.45}._lessonList_43c8p_240{display:flex;flex-direction:column;gap:6px;padding:0 0 0 6px}._lessonButton_43c8p_247{width:100%;display:flex;align-items:flex-start;gap:10px;padding:9px 12px;border:none;border-radius:12px;background:transparent;color:var(--text-secondary);cursor:pointer;font:inherit;text-align:left;transition:all .2s ease}._lessonButton_43c8p_247:hover{color:var(--text-primary);background:var(--bg-surface-hover)}._lessonButton_43c8p_247 span:last-child{min-width:0;line-height:1.45;white-space:normal}._lessonButtonActive_43c8p_274{color:var(--text-primary);background:color-mix(in srgb,var(--accent-soft) 90%,transparent)}._main_43c8p_279{min-width:0}@media(max-width:1280px){._header_43c8p_9{grid-template-columns:1fr;justify-items:start}._topNav_43c8p_58{justify-content:flex-start}._body_43c8p_135{grid-template-columns:1fr}._outlinePanel_43c8p_142{position:static;max-height:none}}@media(max-width:768px){._header_43c8p_9,._body_43c8p_135{padding-left:16px;padding-right:16px}._outlinePanel_43c8p_142{padding:16px}}:root{--font-heading: "Manrope", "Noto Sans SC", sans-serif;--font-body: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--brand-strong: #4f6bff;--accent-strong: #14b8a6;--brand-soft: rgba(79, 107, 255, .18);--accent-soft: rgba(20, 184, 166, .16);--bg-base: #f4f7fb;--bg-elevated: rgba(255, 255, 255, .92);--bg-surface: rgba(255, 255, 255, .86);--bg-surface-hover: rgba(232, 238, 248, .9);--bg-card: #ffffff;--bg-card-gradient: linear-gradient(145deg, rgba(255, 255, 255, .95) 0%, rgba(244, 247, 251, .92) 100%);--bg-assistant-gradient: linear-gradient(180deg, rgba(255, 255, 255, .95) 0%, rgba(239, 244, 255, .95) 100%);--text-primary: #102033;--text-secondary: rgba(16, 32, 51, .74);--text-tertiary: rgba(16, 32, 51, .48);--border-subtle: rgba(103, 120, 148, .16);--border-default: rgba(103, 120, 148, .24);--shadow-md: 0 14px 40px rgba(21, 33, 59, .08);--shadow-lg: 0 30px 80px rgba(21, 33, 59, .14)}:root[data-theme=dark],.dark-theme{--bg-base: #09111f;--bg-elevated: rgba(12, 22, 39, .9);--bg-surface: rgba(17, 29, 49, .82);--bg-surface-hover: rgba(31, 48, 76, .84);--bg-card: #101c31;--bg-card-gradient: linear-gradient(145deg, rgba(18, 30, 49, .95) 0%, rgba(10, 18, 31, .96) 100%);--bg-assistant-gradient: linear-gradient(180deg, rgba(18, 30, 49, .95) 0%, rgba(10, 18, 31, .96) 100%);--text-primary: rgba(245, 248, 255, .96);--text-secondary: rgba(218, 229, 247, .74);--text-tertiary: rgba(218, 229, 247, .48);--border-subtle: rgba(126, 154, 198, .16);--border-default: rgba(126, 154, 198, .24);--shadow-md: 0 18px 46px rgba(0, 0, 0, .28);--shadow-lg: 0 32px 90px rgba(0, 0, 0, .36)}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100%}html{color-scheme:light}html[data-theme=dark]{color-scheme:dark}body{font-family:var(--font-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--bg-base);color:var(--text-primary)}button,input,select,textarea{font:inherit}a{color:var(--brand-strong);text-decoration:none}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:color-mix(in srgb,var(--text-tertiary) 50%,transparent);border-radius:999px}