:root{--color-primary: #E65100;--color-on-primary: #FFFFFF;--color-selected-blue: #1976D2;--color-app-background: #FFFFFF;--color-card-background: #FFFFFF;--color-text-primary: #212121;--color-text-secondary: #666666;--color-divider: #DDDDDD;--color-card-stroke: #E0E0E0;--color-nav-background: #FFFFFF;--color-search-background: #E9ECEF;--color-search-title: #212121;--color-search-info: #666666;--color-notification-unread-bg: #E8F0FE;--color-premium-badge-bg: #FFF3E0;--color-premium-badge-text: #FF5722;--color-card-notes: #3949AB;--color-card-tests: #2E7D32;--color-card-papers: #8E24AA;--color-card-video: #F44336;--color-card-current-affairs: #00897B;--color-card-premium: #F9A825;--color-header-navy: #162447;--color-chat-green: #075E54;--color-chat-bg: #ECE5DD;--color-chat-sent: #128C7E;--color-chat-received: #FFFFFF;--color-faq-question: #212121;--color-faq-answer: #9C27B0;--color-download-card-bg: #E5E5E5;--color-download-card-stroke: #D0D0D0;--color-download-card-text: 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#2A2A2A;--color-text-primary: #FFFFFF;--color-text-secondary: #BDBDBD;--color-divider: #383838;--color-card-stroke: #444444;--color-nav-background: #1E1E1E;--color-search-background: #2A2A2A;--color-search-title: #FFFFFF;--color-search-info: #E9ECEF;--color-notification-unread-bg: #26364D;--color-premium-badge-bg: #3A2A1A;--color-premium-badge-text: #FF8A50;--color-faq-question: #FFFFFF;--color-faq-answer: #C77DD8;--color-download-card-bg: #2A2A2A;--color-download-card-stroke: #D6D6D6;--color-chat-received: #1E1E1E;color-scheme:dark}*{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-app-background);color:var(--color-text-primary);transition:background-color .15s ease,color .15s ease}a{color:inherit;text-decoration:none}button{font-family:inherit}.card{background:var(--color-card-background);border:1px solid var(--color-card-stroke);border-radius:var(--radius-card);box-shadow:var(--shadow-card)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:10px;padding:11px 18px;font-size:14px;font-weight:600;cursor:pointer;transition:opacity .15s ease,transform .05s ease}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:var(--color-on-primary)}.btn-outline{background:transparent;color:var(--color-primary);border:1.5px solid var(--color-primary)}.btn-danger{background:var(--color-danger);color:#fff}.page{max-width:960px;margin:0 auto;padding:20px 16px 40px}.section-title{font-size:16px;font-weight:700;color:var(--color-text-primary);margin:4px 0 12px}.text-secondary{color:var(--color-text-secondary)}.form-field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}.form-field label{font-size:13px;font-weight:600;color:var(--color-text-secondary)}.form-field input,.form-field select,.form-field textarea{border:1.5px solid var(--color-card-stroke);border-radius:10px;padding:11px 12px;font-size:14px;background:var(--color-app-background);color:var(--color-text-primary);outline:none}.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--color-primary)}.form-error{color:var(--color-danger);font-size:12px}.empty-state{text-align:center;padding:48px 16px;color:var(--color-text-secondary)}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px;background:linear-gradient(160deg,var(--color-header-navy),#0c1830)}.auth-card{width:100%;max-width:400px;background:var(--color-card-background);border-radius:16px;padding:32px 28px;box-shadow:0 12px 40px #0000004d}.auth-brand{display:flex;flex-direction:column;align-items:center;gap:12px}.auth-brand 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