:root{--violet: #7c83db;--violet-dark: #5b62b8;--violet-soft: #e8eaff;--pink: #e8a0c4;--pink-soft: #fdeef6;--amber: #e8b866;--amber-soft: #fdf4e3;--green: #7cc4a4;--green-soft: #e6f6ef;--sky: #86b9dd;--sky-soft: #e8f3fa;--red: #dd8f8f;--red-soft: #fbecec;--ink: #33385c;--ink-soft: #5f6588;--muted: #9096b3;--line: #e9eaf4;--card: #ffffff;--card-soft: #f6f7fd;--radius-lg: 28px;--radius-md: 20px;--radius-sm: 14px;--shadow-sm: 0 6px 18px rgba(52, 58, 122, .08);--shadow-md: 0 14px 36px rgba(52, 58, 122, .14);--shadow-lg: 0 26px 60px rgba(52, 58, 122, .2);--font: "Vazirmatn", "IRANSans", "Segoe UI", Tahoma, sans-serif}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;font-family:var(--font);color:var(--ink);background-color:#f0f2fb;-webkit-font-smoothing:antialiased}button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.2px}p{margin:0;line-height:1.9}a{color:inherit;text-decoration:none}.background{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;overflow:hidden;pointer-events:none;background:linear-gradient(160deg,#f0f2fb,#fdf4f9 45%,#eefaf9)}.blob{position:absolute;border-radius:50%;opacity:.55;animation:drift 18s ease-in-out infinite}.floater{position:absolute;font-size:2.2rem;opacity:.35;-webkit-user-select:none;user-select:none;animation:bob 8s ease-in-out infinite}@keyframes drift{0%,to{transform:translateZ(0) scale(1)}50%{transform:translate3d(18px,-26px,0) scale(1.07)}}@keyframes bob{0%,to{transform:translateZ(0) rotate(-8deg)}50%{transform:translate3d(0,-20px,0) 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ease}.btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-sm)}.btn:active:not(:disabled){transform:translateY(0) scale(.98)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--violet),var(--pink));color:#fff;box-shadow:0 12px 26px #6366f159}.btn-ghost{background:#ffffffbf;border:1px solid var(--line)}.btn-danger{background:#fff1f2;color:var(--red)}.btn-lg{padding:16px 30px;font-size:1.05rem}.btn-icon{padding:10px 14px;border-radius:14px}.chip{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;background:var(--card-soft);color:var(--ink-soft);font-size:.85rem;font-weight:600}.chip-open{background:#ecfdf5;color:#047857}.chip-lock{background:#f1f2f9;color:var(--muted)}.chip-past{background:#fff7ed;color:#b45309}.login-card{width:min(460px,100%);padding:34px 30px 30px;border-radius:34px;box-shadow:var(--shadow-lg);background:#ffffffeb;text-align:center}.login-badge{width:96px;height:96px;margin:0 auto 14px;border-radius:32px;display:grid;place-items:center;font-size:3rem;background:linear-gradient(135deg,#f0f2fb,#fce7f3);box-shadow:inset 0 0 0 2px #fffc,var(--shadow-sm)}.field{text-align:right;margin-bottom:14px}.field label{display:block;font-size:.9rem;font-weight:700;color:var(--ink-soft);margin:0 6px 6px}.field input,.field textarea,.field select{width:100%;padding:14px 16px;border-radius:var(--radius-sm);border:2px solid var(--line);background:#fff;outline:none;transition:border-color .2s ease,box-shadow .2s ease}.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--violet);box-shadow:0 0 0 4px #6366f124}.field-ltr input{direction:ltr;text-align:center;letter-spacing:3px;font-weight:700}.alert{border-radius:var(--radius-sm);padding:12px 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p{font-size:.85rem;color:var(--muted);min-height:42px}.course-meta{display:flex;gap:8px;margin-top:10px;font-size:.78rem;color:var(--ink-soft);flex-wrap:wrap}.session-panel{margin-top:26px}.session-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}.session-card{position:relative;border-radius:var(--radius-md);padding:18px;background:#fff;border:2px solid var(--line);box-shadow:var(--shadow-sm);text-align:right}.session-card.locked{background:#f8f9fc;color:var(--muted);cursor:not-allowed;box-shadow:none;filter:saturate(.4)}.session-card.open{cursor:pointer;border-color:var(--green);background:linear-gradient(180deg,#fff,#f2fdf8);box-shadow:0 16px 34px 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320px;gap:18px;align-items:start}@media (max-width: 900px){.ai-layout{grid-template-columns:1fr}}.chat-card{display:flex;flex-direction:column;height:calc(100vh - 210px);min-height:460px;padding:0;overflow:hidden}.chat-scroll{flex:1;overflow-y:auto;padding:22px;display:flex;flex-direction:column;gap:14px;scroll-behavior:smooth}.chat-scroll::-webkit-scrollbar{width:8px}.chat-scroll::-webkit-scrollbar-thumb{background:#dfe2f2;border-radius:999px}.bubble{max-width:78%;padding:14px 18px;border-radius:22px;box-shadow:var(--shadow-sm);font-size:.95rem;line-height:1.95;white-space:pre-wrap;word-break:break-word}.bubble-student{align-self:flex-start;background:linear-gradient(135deg,var(--violet),#818cf8);color:#fff;border-bottom-right-radius:8px}.bubble-ai{align-self:flex-end;background:#fff;border:1px solid var(--line);border-bottom-left-radius:8px}.bubble-error{align-self:flex-end;background:#fff1f2;color:#be123c;border:1px solid #fecdd3}.bubble img{display:block;width:100%;max-width:340px;border-radius:16px;margin-top:10px}.bubble audio{margin-top:10px;width:260px}.bubble-meta{margin-top:8px;font-size:.72rem;opacity:.7;display:flex;gap:10px;align-items:center}.composer{border-top:1px solid var(--line);padding:14px 18px 18px;background:var(--card-soft)}.composer-row{display:flex;align-items:flex-end;gap:10px}.composer textarea{flex:1;resize:none;min-height:52px;max-height:150px;padding:14px 16px;border-radius:18px;border:2px solid var(--line);background:#fff;outline:none;line-height:1.8}.composer textarea:focus{border-color:var(--violet)}.attach{display:inline-grid;place-items:center;width:52px;height:52px;border-radius:18px;background:#fff;border:2px solid var(--line);cursor:pointer;font-size:1.3rem;transition:border-color .2s ease,transform .15s ease}.attach:hover{border-color:var(--violet);transform:translateY(-2px)}.preview-strip{display:flex;align-items:center;gap:10px;margin-bottom:10px;padding:8px 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rgba(255,255,255,.45);border-top-color:#fff;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.support-fab{position:fixed;inset-inline-start:22px;bottom:22px;z-index:60;width:62px;height:62px;border:none;border-radius:50%;cursor:pointer;background:linear-gradient(135deg,var(--violet),var(--pink));color:#fff;box-shadow:0 16px 34px #6366f16b;display:grid;place-items:center}.support-fab-icon{font-size:1.6rem;line-height:1}.support-badge{position:absolute;top:-4px;inset-inline-end:-4px;min-width:24px;height:24px;padding:0 6px;border-radius:999px;background:var(--red);color:#fff;font-size:.78rem;font-weight:800;display:grid;place-items:center;box-shadow:0 4px 10px #ef444480}.support-dot{position:absolute;bottom:4px;inset-inline-end:6px;width:12px;height:12px;border-radius:50%;border:2px solid #fff}.support-dot.on{background:var(--green);animation:pulse 2s infinite}.support-dot.off{background:#94a3b8}.support-panel{position:fixed;inset-inline-start:22px;bottom:96px;z-index:60;width:min(370px,calc(100vw - 44px));max-height:min(560px,calc(100vh - 140px));padding:16px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow-lg)}.support-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;border-bottom:1px solid var(--line);padding-bottom:10px}.support-head h3{font-size:1rem}.support-head span{display:block;font-size:.75rem;margin-top:4px}.state-on{color:#047857}.state-off{color:var(--muted)}.support-intro{text-align:center;padding:16px 6px 10px}.support-intro p{font-size:.88rem;color:var(--ink-soft);margin:12px 0 16px}.support-hero{font-size:2.8rem}.support-foot{border-top:1px solid var(--line);padding-top:10px;text-align:center}.support-composer{display:flex;gap:8px;align-items:center}.support-composer input{flex:1;padding:12px 14px;border-radius:16px;border:2px solid var(--line);background:#fff;outline:none}.support-composer input:focus{border-color:var(--violet)}.thread{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding:6px 2px;min-height:220px;max-height:46vh}.thread-compact{min-height:190px;max-height:300px}.thread::-webkit-scrollbar{width:6px}.thread::-webkit-scrollbar-thumb{background:#dfe2f2;border-radius:999px}.chat-line{max-width:86%;padding:10px 14px;border-radius:18px;font-size:.89rem;line-height:1.85;white-space:pre-wrap;word-break:break-word;display:flex;flex-direction:column;gap:2px}.chat-mine{align-self:flex-start;background:linear-gradient(135deg,var(--violet),#818cf8);color:#fff;border-bottom-right-radius:6px}.chat-theirs{align-self:flex-end;background:#fff;border:1px solid var(--line);border-bottom-left-radius:6px}.chat-system{align-self:center;background:#f3f4ff;color:var(--ink-soft);font-size:.8rem;text-align:center;max-width:94%;border-radius:14px}.chat-author{font-size:.72rem;font-weight:700;opacity:.75}.chat-time{font-size:.68rem;opacity:.6;align-self:flex-start}.chat-typing{padding:12px 16px}.support-layout{display:grid;grid-template-columns:360px 1fr;gap:18px;align-items:start}@media (max-width: 900px){.support-layout{grid-template-columns:1fr}}.ticket-card{width:100%;text-align:right;border:2px solid var(--line);background:#fff;border-radius:var(--radius-md);padding:14px 16px;cursor:pointer;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:8px;font-family:inherit}.ticket-card b{font-size:.94rem}.ticket-card.active{border-color:var(--violet);box-shadow:var(--shadow-md)}.ticket-card.urgent{border-inline-start:6px solid var(--red)}.ticket-meta{display:flex;gap:6px;flex-wrap:wrap}.ticket-meta .chip{font-size:.75rem;padding:4px 10px}.ticket-date{font-size:.75rem;color:var(--muted)}.chip-answered{background:#eff6ff;color:#1d4ed8}.chip-new{background:#fee2e2;color:#b91c1c}.chat-panel{display:flex;flex-direction:column;min-height:420px;position:sticky;top:20px}.ticket-form{display:grid;grid-template-columns:2fr 1fr 1fr;gap:12px}@media (max-width: 720px){.ticket-form{grid-template-columns:1fr}}.closed-box{text-align:center;padding:14px;background:var(--card-soft);border-radius:var(--radius-sm);display:flex;flex-direction:column;gap:10px;align-items:center}.closed-box p{font-size:.88rem;color:var(--ink-soft)}.star{border:none;background:none;font-size:1.5rem;cursor:pointer;line-height:1;transition:transform .15s ease}.star:hover{transform:scale(1.2)}.hint-active{border-color:var(--violet);background:#f0f2fb;color:var(--violet-dark);font-weight:700}.tab-row,.course-picker{flex-wrap:wrap;margin-bottom:18px}.next-session{display:flex;align-items:center;gap:14px;padding:16px 20px;margin-bottom:18px;border-inline-start:6px solid var(--violet)}.next-icon{font-size:2rem}.next-session p{font-size:.86rem;color:var(--ink-soft);margin-top:4px}.tile-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(165px,1fr));gap:14px}.tile{background:var(--card);border-radius:var(--radius-md);padding:16px;box-shadow:var(--shadow-sm);text-align:center;border:1px solid rgba(255,255,255,.7)}.tile-icon{font-size:1.7rem;display:block;margin-bottom:6px}.tile b{font-size:1.6rem;color:var(--violet-dark);display:block}.tile-label{font-size:.78rem;color:var(--muted)}.spark{display:flex;align-items:flex-end;gap:6px;height:130px;padding-top:8px}.spark-col{flex:1;height:100%;display:flex;align-items:flex-end}.spark-bar{display:block;width:100%;border-radius:8px 8px 4px 4px;background:linear-gradient(180deg,var(--violet),#a5b4fc)}.grid-table{width:100%;border-collapse:collapse;font-size:.87rem}.grid-table th{text-align:right;font-size:.78rem;color:var(--muted);font-weight:700;padding:8px 10px;border-bottom:2px solid var(--line);white-space:nowrap}.grid-table td{padding:10px;border-bottom:1px solid var(--line)}.grid-table tbody tr{cursor:pointer;transition:background .15s ease}.grid-table tbody tr:hover{background:var(--card-soft)}.grid-table tbody tr.active{background:#f0f2fb}.scroll-box{max-height:300px;overflow-y:auto;padding-inline-end:4px}.scroll-box.tall{max-height:60vh}.scroll-box::-webkit-scrollbar{width:6px}.scroll-box::-webkit-scrollbar-thumb{background:#dfe2f2;border-radius:999px}.thumb{width:54px;height:54px;object-fit:cover;border-radius:12px}.mini-select,.mini-input{padding:9px 12px;border-radius:12px;border:2px solid var(--line);background:#fff;outline:none;font-size:.85rem}.mini-select:focus,.mini-input:focus{border-color:var(--violet)}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:70;background:#1f244073;display:grid;place-items:center;padding:20px}.modal{width:min(560px,100%);max-height:88vh;overflow-y:auto;box-shadow:var(--shadow-lg)}.notice-board{margin-bottom:20px;border-inline-start:6px solid var(--amber)}.notice-board h3{font-size:1rem;margin-bottom:12px}.notice-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px}.notice{background:var(--card-soft);border-radius:var(--radius-sm);padding:12px 14px}.notice p{font-size:.85rem;color:var(--ink-soft);margin:6px 0 8px}.float-y{animation:float-y 3s ease-in-out infinite}@keyframes float-y{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.pulse-soft{animation:pulse-soft 1.6s ease-in-out infinite}@keyframes pulse-soft{0%,to{transform:scale(1)}50%{transform:scale(1.04)}}@media (prefers-reduced-motion: reduce){.float-y,.pulse-soft{animation:none}}.avatar{overflow:hidden;flex:none}.avatar img{width:100%;height:100%;object-fit:cover;border-radius:inherit;display:block}.avatar-click{cursor:pointer}.who-button{background:none;border:none;padding:0;cursor:pointer;font:inherit;color:inherit;text-align:right;border-radius:var(--radius-md);transition:transform .15s ease}.who-button:hover{transform:translateY(-2px)}.who-button:hover .who h2{color:var(--violet-dark)}.profile-head{display:flex;gap:18px;align-items:center;flex-wrap:wrap}.password-pill{display:inline-block;direction:ltr;font-family:Courier New,monospace;letter-spacing:2px;background:#f0f2fb;color:var(--violet-dark);border-radius:10px;padding:4px 12px;font-size:1.05rem}.credential-card .credential-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px dashed var(--line)}.family-tile{background:var(--card-soft);border-radius:var(--radius-sm);padding:12px 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