@import"https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Inter:wght@400;500;600&family=Cormorant+Garamond:ital,wght@0,400;0,500;1,400;1,500;1,600&family=JetBrains+Mono:wght@400;500&display=swap";.aurora-bg{position:fixed;top:0;right:0;bottom:0;left:0;z-index:0;pointer-events:none;background:var(--aurora-bg);background-size:200% 200%;animation:aurora-drift var(--duration-aurora) linear infinite}.aurora-bg__bloom{position:absolute;border-radius:50%;filter:blur(100px);pointer-events:none}.aurora-bg__bloom--one{width:60%;height:60%;top:10%;left:55%;background:var(--aurora-bloom-1)}.aurora-bg__bloom--two{width:50%;height:50%;top:55%;left:5%;background:var(--aurora-bloom-2)}@keyframes aurora-drift{0%{background-position:0% 0%}50%{background-position:100% 100%}to{background-position:0% 0%}}.glass-card{background-color:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);padding:var(--sp-6);animation:glass-card-mount var(--duration-mount) var(--ease-out) both;transition:transform var(--duration-normal) var(--ease-out),box-shadow var(--duration-normal) var(--ease-out)}.glass-card--radius-sm{border-radius:var(--radius-sm)}.glass-card--radius-md{border-radius:var(--radius-md)}.glass-card--radius-lg{border-radius:var(--radius-lg)}.glass-card--radius-xl{border-radius:var(--radius-xl)}.glass-card--subject-physics{background-color:color-mix(in srgb,var(--subject-physics) 5%,var(--glass-bg))}.glass-card--subject-chemistry{background-color:color-mix(in srgb,var(--subject-chemistry) 5%,var(--glass-bg))}.glass-card--subject-maths{background-color:color-mix(in srgb,var(--subject-maths) 5%,var(--glass-bg))}.glass-card--subject-biology{background-color:color-mix(in srgb,var(--subject-biology) 5%,var(--glass-bg))}.glass-card--hoverable:hover{transform:translateY(-2px);box-shadow:var(--glass-shadow),var(--glass-shadow)}.glass-card--as-button{-moz-appearance:none;appearance:none;-webkit-appearance:none;font:inherit;color:inherit;text-align:inherit;width:100%;margin:0;cursor:pointer}@keyframes glass-card-mount{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.glass-button{display:inline-flex;align-items:center;justify-content:center;gap:var(--sp-2);font-family:var(--font-body);font-weight:var(--fw-medium);color:var(--ink);line-height:1;border-radius:var(--radius-sm);cursor:pointer;-webkit-user-select:none;user-select:none;transition:transform var(--duration-fast) var(--ease-out),background-color var(--duration-normal) var(--ease-out),border-color var(--duration-normal) var(--ease-out),box-shadow var(--duration-normal) var(--ease-out),opacity var(--duration-normal) var(--ease-out)}.glass-button--size-sm{padding:var(--sp-2) 14px;font-size:13px;min-height:36px}.glass-button--size-md{padding:10px var(--sp-5);font-size:14px;min-height:44px}.glass-button--variant-primary{background-color:var(--btn-primary-bg);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--gold);box-shadow:var(--glass-shadow)}.glass-button--variant-secondary{background-color:transparent;border:1px solid var(--glass-border)}.glass-button--variant-tertiary{background-color:transparent;border:1px solid transparent}.glass-button--variant-tertiary:hover:not(:disabled){background-color:var(--glass-bg);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-color:var(--glass-border)}.glass-button--variant-gold{background-color:var(--gold);color:var(--ink);border:1px solid var(--gold)}.glass-button:active:not(:disabled){transform:scale(.98)}.glass-button:disabled,.glass-button[aria-busy=true]{opacity:.5;cursor:not-allowed}.glass-button__spinner{display:inline-block;width:1em;height:1em;flex-shrink:0;animation:glass-button-spin .8s linear infinite}.glass-button__spinner-track{opacity:.25}.glass-button__spinner-arc{opacity:.85}@keyframes glass-button-spin{to{transform:rotate(360deg)}}.glass-chip{display:inline-flex;align-items:center;justify-content:center;gap:var(--sp-1);padding:0 12px;white-space:nowrap;font-family:var(--font-body);font-weight:var(--fw-medium);color:var(--fg-primary);line-height:1;background-color:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-pill);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:background-color var(--duration-normal) var(--ease-out),border-color var(--duration-normal) var(--ease-out),color var(--duration-normal) var(--ease-out)}button.glass-chip{cursor:pointer;margin:0;-moz-appearance:none;appearance:none;-webkit-appearance:none}.glass-chip--interactive{cursor:pointer}.glass-chip--size-sm{height:24px;font-size:11px}.glass-chip--size-md{height:28px;font-size:12px}.glass-chip--size-lg{height:32px;font-size:13px}.glass-chip--subject-physics{background-color:color-mix(in srgb,var(--subject-physics) 8%,var(--glass-bg))}.glass-chip--subject-chemistry{background-color:color-mix(in srgb,var(--subject-chemistry) 8%,var(--glass-bg))}.glass-chip--subject-maths{background-color:color-mix(in srgb,var(--subject-maths) 8%,var(--glass-bg))}.glass-chip--subject-biology{background-color:color-mix(in srgb,var(--subject-biology) 8%,var(--glass-bg))}.glass-chip--active.glass-chip--subject-physics{background-color:color-mix(in srgb,var(--subject-physics) 18%,var(--glass-bg));border-color:var(--subject-physics)}.glass-chip--active.glass-chip--subject-chemistry{background-color:color-mix(in srgb,var(--subject-chemistry) 18%,var(--glass-bg));border-color:var(--subject-chemistry)}.glass-chip--active.glass-chip--subject-maths{background-color:color-mix(in srgb,var(--subject-maths) 18%,var(--glass-bg));border-color:var(--subject-maths)}.glass-chip--active.glass-chip--subject-biology{background-color:color-mix(in srgb,var(--subject-biology) 18%,var(--glass-bg));border-color:var(--subject-biology)}.glass-chip--active-gold{background-color:color-mix(in srgb,var(--gold) 18%,var(--glass-bg));border-color:var(--gold)}.glass-chip--quota{font-family:var(--font-mono)}.glass-chip--quota-error{background-color:color-mix(in srgb,var(--color-error) 12%,var(--glass-bg));border-color:var(--color-error);color:var(--color-error)}.glass-input-field{display:flex;flex-direction:column;gap:var(--sp-2);width:100%}.glass-input-field__label{font-family:var(--font-body);font-size:var(--text-caption);font-weight:var(--fw-medium);color:var(--fg-secondary);line-height:1}.glass-input{display:flex;align-items:center;gap:var(--sp-2);background-color:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-sm);padding:var(--sp-3) var(--sp-4);-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));transition:border-color var(--duration-normal) var(--ease-out),background-color var(--duration-normal) var(--ease-out)}.glass-input--focused,.glass-input:focus-within{border-color:var(--gold)}.glass-input--error,.glass-input--error:focus-within,.glass-input--error.glass-input--focused{border-color:var(--color-error)}.glass-input__input{flex:1 1 auto;min-width:0;background:transparent;border:0;outline:0;padding:0;margin:0;font-family:var(--font-body);font-size:var(--text-body);font-weight:var(--fw-regular);color:var(--fg-primary);line-height:1.5}.glass-input__input::placeholder{color:var(--fg-secondary);opacity:1}.glass-input__left,.glass-input__right{display:inline-flex;align-items:center;flex:0 0 auto;color:var(--fg-secondary)}.glass-input__error{font-family:var(--font-body);font-size:var(--text-caption);color:var(--color-error);line-height:1.4}.otp-grid{display:flex;flex-direction:column;gap:var(--sp-3)}.otp-grid__row{display:flex;gap:var(--sp-2)}.otp-box{flex:0 0 auto;width:48px;height:56px;text-align:center;background-color:var(--glass-bg);border:1px solid var(--glass-border);border-radius:var(--radius-sm);padding:0;margin:0;-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));font-family:var(--font-mono);font-size:20px;font-weight:var(--fw-medium);color:var(--fg-primary);transition:border-color var(--duration-normal) var(--ease-out),background-color var(--duration-normal) var(--ease-out);outline:0}.otp-box:focus,.otp-box--focused{border-color:var(--gold)}.otp-box--error,.otp-box--error:focus{border-color:var(--color-error)}.otp-grid__resend{font-family:var(--font-body);font-size:var(--text-caption);color:var(--fg-secondary);line-height:1.4}.otp-grid__resend-button{-moz-appearance:none;appearance:none;-webkit-appearance:none;background:transparent;border:0;padding:0;margin:0;cursor:pointer;font-family:var(--font-body);font-size:var(--text-caption);font-weight:var(--fw-medium);color:var(--gold);text-decoration:underline;text-underline-offset:2px}.glass-modal__backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:var(--sp-6);background-color:color-mix(in srgb,var(--ink) 40%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);animation:glass-modal-backdrop-mount var(--duration-mount) var(--ease-out) both}.glass-modal__card{position:relative;width:100%;background-color:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);border-radius:var(--radius-lg);padding:var(--sp-6);color:var(--fg-primary);animation:glass-modal-card-mount var(--duration-mount) var(--ease-out) both;outline:none}.glass-modal__card--sm{max-width:320px}.glass-modal__card--md{max-width:480px}.glass-modal__card--lg{max-width:640px}.glass-modal__title{margin:0 0 var(--sp-2) 0;font-family:var(--font-display);font-weight:var(--fw-medium);font-size:var(--text-h2);line-height:var(--leading-display);color:var(--fg-primary)}.glass-modal__description{margin:0 0 var(--sp-3) 0;font-family:var(--font-body);font-size:var(--text-body);line-height:var(--leading-body);color:var(--fg-secondary)}.glass-modal__body{font-family:var(--font-body);font-size:var(--text-body);line-height:var(--leading-body);color:var(--fg-primary)}@media(max-width:768px){.glass-modal__backdrop{align-items:flex-end;padding:0}.glass-modal__card,.glass-modal__card--sm,.glass-modal__card--md,.glass-modal__card--lg{max-width:100%;border-radius:var(--radius-lg) var(--radius-lg) 0 0;animation:glass-modal-sheet-mount var(--duration-mount) var(--ease-out) both}}@keyframes glass-modal-backdrop-mount{0%{opacity:0}to{opacity:1}}@keyframes glass-modal-card-mount{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes glass-modal-sheet-mount{0%{opacity:0;transform:translateY(100%)}to{opacity:1;transform:translateY(0)}}.avatar{position:relative;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;border-radius:50%;background-color:var(--glass-bg);border:1px solid var(--glass-border);-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));overflow:hidden;font-family:var(--font-body);font-weight:var(--fw-medium);color:var(--ink);line-height:1;-webkit-user-select:none;user-select:none}.avatar--size-sm{width:24px;height:24px;font-size:11px}.avatar--size-md{width:32px;height:32px;font-size:13px}.avatar--size-lg{width:40px;height:40px;font-size:16px}.avatar__image{width:100%;height:100%;object-fit:cover;display:block}.avatar__initials{display:inline-block;text-transform:uppercase;letter-spacing:.5px}.avatar__status{position:absolute;bottom:0;right:0;border-radius:50%;border:2px solid var(--bg-surface);box-sizing:border-box}.avatar--size-sm .avatar__status{width:6px;height:6px;border-width:1px}.avatar--size-md .avatar__status{width:8px;height:8px}.avatar--size-lg .avatar__status{width:10px;height:10px}.avatar__status--online{background-color:var(--color-success)}.avatar__status--away{background-color:var(--gold)}.avatar__status--offline{background-color:var(--ink-soft)}.glass-nav{position:sticky;top:0;z-index:40;width:100%}.glass-nav__bar{height:64px;display:flex;align-items:center;padding:0 var(--sp-5);gap:var(--sp-3);background-color:var(--glass-bg-faint);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid var(--glass-border);transition:background-color var(--duration-normal) var(--ease-out),box-shadow var(--duration-normal) var(--ease-out),border-color var(--duration-normal) var(--ease-out)}.glass-nav__bar[data-scrolled=true]{background-color:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));box-shadow:var(--glass-shadow)}.glass-nav__bar[data-subject=physics]{border-bottom-color:color-mix(in srgb,var(--subject-physics) 30%,transparent)}.glass-nav__bar[data-subject=chemistry]{border-bottom-color:color-mix(in srgb,var(--subject-chemistry) 30%,transparent)}.glass-nav__bar[data-subject=maths]{border-bottom-color:color-mix(in srgb,var(--subject-maths) 30%,transparent)}.glass-nav__bar[data-subject=biology]{border-bottom-color:color-mix(in srgb,var(--subject-biology) 30%,transparent)}.glass-nav__brand{display:flex;flex-direction:column;justify-content:center;min-width:0}.glass-nav__wordmark{font-family:var(--font-accent);font-style:italic;font-size:20px;font-weight:var(--fw-medium);color:var(--fg-primary);cursor:pointer;line-height:1.2;background:none;border:none;padding:0;text-align:left}.glass-nav__subject-tag{font-size:10px;font-family:var(--font-mono);line-height:1;margin-top:2px;display:flex;align-items:center;gap:3px}.glass-nav__subject-tag[data-subject=physics]{color:var(--subject-physics)}.glass-nav__subject-tag[data-subject=chemistry]{color:var(--subject-chemistry)}.glass-nav__subject-tag[data-subject=maths]{color:var(--subject-maths)}.glass-nav__subject-tag[data-subject=biology]{color:var(--subject-biology)}.glass-nav__center{flex:1;display:none;justify-content:center;gap:var(--sp-6)}@media(min-width:768px){.glass-nav__center{display:flex}}.glass-nav__link{font-size:14px;font-family:var(--font-body);color:var(--fg-secondary);text-decoration:none;font-weight:var(--fw-regular);position:relative;padding:4px 0;border-bottom:2px solid transparent;background:none;border-left:none;border-right:none;border-top:none;cursor:pointer;transition:color var(--duration-normal) var(--ease-out),border-color var(--duration-normal) var(--ease-out)}.glass-nav__link:hover{color:var(--fg-primary)}.glass-nav__link[aria-current=page]{color:var(--fg-primary);font-weight:var(--fw-medium);border-bottom-color:var(--nav-accent, var(--gold))}.glass-nav__right{display:flex;align-items:center;gap:var(--sp-2);margin-left:auto}.glass-nav__theme-toggle{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;background-color:var(--glass-bg-opaque);border:1.5px solid color-mix(in srgb,var(--ink) 18%,var(--glass-border));box-shadow:var(--glass-shadow);cursor:pointer;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);transition:background-color var(--duration-normal) var(--ease-out),border-color var(--duration-normal) var(--ease-out),transform var(--duration-fast) var(--ease-out);color:var(--ink)}.glass-nav__theme-toggle:hover{border-color:color-mix(in srgb,var(--gold) 40%,var(--glass-border))}.glass-nav__theme-toggle:active{transform:scale(.95)}.glass-nav__theme-icon{width:18px;height:18px;display:block}.glass-nav__theme-icon--sun{color:var(--gold)}.glass-nav__theme-icon--moon{color:var(--subject-physics)}.glass-nav__quota-text--over{color:var(--color-error);font-weight:var(--fw-semibold)}.glass-nav__mobile-quota-text{font-family:var(--font-mono);font-size:var(--text-mono);color:var(--fg-secondary)}.glass-nav__cmdk-chip{display:none}@media(min-width:1024px){.glass-nav__cmdk-chip{display:inline-flex}}.glass-nav__avatar-wrap{position:relative}.glass-nav__avatar-button{background:none;border:none;padding:0;border-radius:50%;cursor:pointer;display:inline-flex}.glass-nav__avatar-menu{position:absolute;top:100%;right:0;margin-top:6px;z-index:50;background-color:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);border-radius:var(--radius-md);padding:var(--sp-2);min-width:180px}.glass-nav__menu-item{display:block;width:100%;padding:10px 12px;border-radius:10px;font-size:14px;background:transparent;border:none;cursor:pointer;font-family:var(--font-body);color:var(--fg-primary);text-align:left;text-decoration:none}.glass-nav__menu-item:hover{background-color:color-mix(in srgb,var(--ink) 6%,transparent)}.glass-nav__menu-divider{height:1px;background-color:var(--glass-border);margin:var(--sp-1) 0}.glass-nav__menu-item--danger{color:var(--color-error)}.glass-nav__signin{display:none;padding:8px 14px;border-radius:12px;font-size:13px;font-weight:var(--fw-medium);cursor:pointer;background:transparent;border:1px solid transparent;color:var(--fg-secondary);font-family:var(--font-body)}@media(min-width:768px){.glass-nav__signin{display:inline-flex}}.glass-nav__mobile-trigger{width:32px;height:32px;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:transparent;border:1px solid transparent;cursor:pointer;padding:6px}.glass-nav__mobile-trigger>span{display:block;height:1.5px;background-color:var(--fg-secondary);border-radius:1px}.glass-nav__mobile-trigger>span:nth-child(1){width:16px}.glass-nav__mobile-trigger>span:nth-child(2){width:12px}@media(min-width:768px){.glass-nav__mobile-trigger{display:none}}.glass-nav__crisis{padding:var(--sp-3) var(--sp-5);display:flex;align-items:center;justify-content:space-between;gap:var(--sp-3);flex-wrap:wrap;background-color:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));border-bottom:1px solid var(--glass-border)}.glass-nav__crisis-label{font-size:10px;font-family:var(--font-mono);letter-spacing:1px;color:var(--fg-secondary);text-transform:uppercase;margin-bottom:var(--sp-1)}.glass-nav__crisis-list{font-size:13px;color:var(--fg-primary);line-height:1.6}.glass-nav__crisis-dismiss{background:none;border:none;cursor:pointer;font-size:16px;color:var(--fg-secondary);padding:4px;flex-shrink:0;line-height:1}.glass-nav__mobile-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:45;background-color:color-mix(in srgb,var(--ink) 50%,transparent);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:none;cursor:pointer}.glass-nav__mobile-sheet{position:fixed;top:0;left:0;right:0;z-index:46;max-height:70vh;overflow-y:auto;background-color:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);border-radius:0 0 var(--radius-xl) var(--radius-xl);padding:var(--sp-4) var(--sp-5);animation:glass-nav-sheet-down var(--duration-mount) var(--ease-out) both}.glass-nav__mobile-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--sp-4)}.glass-nav__mobile-link{display:block;padding:12px 0;font-size:16px;color:var(--fg-secondary);text-decoration:none;border-bottom:1px solid var(--glass-border);background:none;border-top:none;border-left:none;border-right:none;width:100%;text-align:left;cursor:pointer;font-family:var(--font-body)}.glass-nav__mobile-link[aria-current=page]{color:var(--fg-primary);font-weight:var(--fw-medium)}.glass-nav__mobile-link--danger{color:var(--color-error)}.glass-nav__mobile-quota{margin-top:var(--sp-3);padding:var(--sp-3);border-radius:14px;background-color:color-mix(in srgb,var(--gold) 6%,transparent);border:1px solid var(--glass-border);font-size:13px}.glass-nav__mobile-cta-wrap{margin-top:var(--sp-4)}.glass-nav__mobile-cta-wrap .glass-button{width:100%}.glass-nav__cmdk-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;background-color:color-mix(in srgb,var(--ink) 20%,transparent);border:none;cursor:pointer}.glass-nav__cmdk-dialog{position:fixed;top:20%;left:50%;transform:translate(-50%);z-index:51;width:90%;max-width:560px;border:none;padding:0;border-radius:var(--radius-lg);background-color:var(--glass-bg);-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));box-shadow:var(--glass-shadow);animation:glass-nav-sheet-down var(--duration-mount) var(--ease-out) both;color:var(--fg-primary)}.glass-nav__cmdk-input-wrap{padding:var(--sp-4) var(--sp-5);border-bottom:1px solid var(--glass-border)}.glass-nav__cmdk-input{width:100%;padding:10px 0;border:none;background:transparent;font-family:var(--font-body);font-size:15px;color:var(--fg-primary);outline:none}.glass-nav__cmdk-results{padding:var(--sp-2) var(--sp-3);max-height:340px;overflow-y:auto}.glass-nav__cmdk-section{font-size:10px;font-family:var(--font-mono);letter-spacing:1px;color:var(--fg-secondary);padding:var(--sp-2) var(--sp-2) 4px;text-transform:uppercase}.glass-nav__cmdk-result{padding:8px;border-radius:8px;font-size:14px;cursor:pointer;color:var(--fg-primary);background:none;border:none;width:100%;text-align:left;font-family:var(--font-body)}.glass-nav__cmdk-result:hover{background-color:color-mix(in srgb,var(--ink) 6%,transparent)}@keyframes glass-nav-sheet-down{0%{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}.glass-nav__cmdk-dialog{animation-name:glass-nav-cmdk-down}@keyframes glass-nav-cmdk-down{0%{opacity:0;transform:translate(-50%,-12px)}to{opacity:1;transform:translate(-50%)}}.eyebrow{display:block;margin:0 0 var(--sp-2);font-family:var(--font-body);font-size:var(--text-mono);font-weight:var(--fw-medium);letter-spacing:1.5px;text-transform:uppercase;color:var(--ink-soft);line-height:1}.eyebrow--mono{font-family:var(--font-mono)}.brand-loader{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--sp-10);padding:var(--sp-8);overflow:hidden;font-family:var(--font-body);color:var(--fg-primary)}.brand-loader__aurora{position:absolute;top:0;right:0;bottom:0;left:0;z-index:0;background:var(--aurora-bg);background-size:200% 200%;animation:brand-loader-aurora var(--duration-aurora) linear infinite}.brand-loader__aurora:before,.brand-loader__aurora:after{content:"";position:absolute;border-radius:50%;filter:blur(100px);pointer-events:none}.brand-loader__aurora:before{width:60%;height:60%;top:10%;left:55%;background:var(--aurora-bloom-1)}.brand-loader__aurora:after{width:50%;height:50%;top:55%;left:5%;background:var(--aurora-bloom-2)}@keyframes brand-loader-aurora{0%{background-position:0% 0%}50%{background-position:100% 100%}to{background-position:0% 0%}}.brand-loader__stage{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--sp-10);animation:brand-loader-rise var(--duration-mount) var(--ease-out) both}@keyframes brand-loader-rise{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.brand-loader__mark{position:relative;font-family:var(--font-accent);font-style:italic;font-weight:var(--fw-medium);font-size:clamp(40px,9vw,72px);letter-spacing:-.5px;line-height:1;color:var(--fg-primary)}.brand-loader__mark:after{content:"SimTutor";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(105deg,transparent 38%,color-mix(in srgb,var(--gold) 55%,transparent) 50%,transparent 62%);background-size:250% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:brand-loader-sheen 3.6s var(--ease-out) infinite}@keyframes brand-loader-sheen{0%{background-position:140% 0}55%,to{background-position:-40% 0}}.brand-loader__pulse{display:flex;align-items:center;gap:var(--sp-5)}.brand-loader__dot{width:11px;height:11px;border-radius:50%;background:var(--c);box-shadow:0 0 0 6px color-mix(in srgb,var(--c) 14%,transparent);opacity:.28;transform:scale(.78);animation:brand-loader-bob 1.5s var(--ease-out) infinite}.brand-loader__dot:nth-child(1){--c: var(--subject-physics);animation-delay:0s}.brand-loader__dot:nth-child(2){--c: var(--subject-chemistry);animation-delay:.18s}.brand-loader__dot:nth-child(3){--c: var(--subject-maths);animation-delay:.36s}.brand-loader__dot:nth-child(4){--c: var(--subject-biology);animation-delay:.54s}@keyframes brand-loader-bob{0%,75%,to{opacity:.28;transform:scale(.78)}32%{opacity:1;transform:scale(1.12)}}.brand-loader__caption{min-height:1.2em;font-family:var(--font-mono);font-size:var(--text-mono);letter-spacing:1.5px;text-transform:uppercase;text-align:center;color:var(--fg-secondary);opacity:1;transition:opacity .32s var(--ease-out)}.brand-loader__caption--hidden{opacity:0}@media(prefers-reduced-motion:reduce){.brand-loader__aurora,.brand-loader__stage,.brand-loader__mark:after,.brand-loader__dot{animation:none}.brand-loader__mark:after{display:none}.brand-loader__dot{opacity:.7;transform:none}.brand-loader__caption{transition:none}}@property --ring-progress{syntax: "<number>"; initial-value: 0; inherits: false;}.progress-ring{position:relative;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;isolation:isolate;border-radius:50%;background:conic-gradient(var(--ring-color, var(--gold)) 0%,var(--ring-color, var(--gold)) calc(var(--ring-progress) * 1%),var(--ring-track, var(--glass-border)) calc(var(--ring-progress) * 1%),var(--ring-track, var(--glass-border)) 100%);-webkit-mask:radial-gradient(circle,transparent calc(50% - var(--ring-thickness, 8px) - .5px),black calc(50% - var(--ring-thickness, 8px)));mask:radial-gradient(circle,transparent calc(50% - var(--ring-thickness, 8px) - .5px),black calc(50% - var(--ring-thickness, 8px)));transition:--ring-progress .6s var(--ease-out)}.progress-ring__label{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-family:var(--font-body);font-weight:var(--fw-medium);color:var(--ink);line-height:1;-webkit-user-select:none;user-select:none;pointer-events:none}.progress-ring-wrapper{position:relative;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}@media(prefers-reduced-motion:reduce){.progress-ring{transition:none}}.activity-heatmap{display:inline-grid;grid-auto-flow:column}.activity-heatmap__cell{border-radius:2px;background-color:var(--cell-color, var(--gold))}.toast-stack{position:fixed;top:var(--sp-4);right:var(--sp-4);z-index:1000;display:flex;flex-direction:column;gap:var(--sp-2);pointer-events:none}.toast-stack>*{pointer-events:auto}.toast{display:inline-flex;align-items:center;gap:var(--sp-3);min-width:240px;max-width:360px;padding:var(--sp-3) var(--sp-4);background-color:var(--glass-bg);border:1px solid var(--glass-border);-webkit-backdrop-filter:blur(var(--glass-blur));backdrop-filter:blur(var(--glass-blur));box-shadow:var(--glass-shadow);border-radius:var(--radius-md);font-family:var(--font-body);font-weight:var(--fw-medium);color:var(--ink);line-height:1.4;animation:toast-mount var(--duration-normal) var(--ease-out)}.toast__icon{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:16px;height:16px;color:var(--toast-accent, var(--ink-soft))}.toast__message{flex:1 1 auto;font-size:var(--text-body)}.toast--info{border-left:3px solid var(--ink-soft);--toast-accent: var(--ink-soft)}.toast--success{border-left:3px solid var(--color-success);--toast-accent: var(--color-success)}.toast--warning{border-left:3px solid var(--color-warning);--toast-accent: var(--color-warning)}.toast--error{border-left:3px solid var(--color-error);--toast-accent: var(--color-error)}@keyframes toast-mount{0%{transform:translate(16px);opacity:0}to{transform:translate(0);opacity:1}}@media(prefers-reduced-motion:reduce){.toast{animation:none}}.error-boundary{position:relative;min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:1.5rem;background:var(--aurora-bg)}.error-boundary__card{position:relative;z-index:1;max-width:30rem;width:100%;text-align:center;display:flex;flex-direction:column;align-items:center;gap:.75rem;padding:2.5rem 2rem}.error-boundary__eyebrow{font-family:JetBrains Mono,monospace;font-size:var(--text-mono, .75rem);color:var(--ink-soft);letter-spacing:.08em;text-transform:uppercase;margin:0}.error-boundary__title{font-family:DM Sans,sans-serif;font-size:var(--text-h2, 1.375rem);font-weight:500;color:var(--ink);letter-spacing:-.02em;margin:0}.error-boundary__body{font-family:Inter,sans-serif;font-size:var(--text-body, 1rem);color:var(--ink-soft);line-height:1.5;margin:0 0 .5rem}.error-boundary__detail{font-family:JetBrains Mono,monospace;font-size:var(--text-mono, .75rem);color:var(--ink-soft);background:color-mix(in srgb,var(--ink) 6%,transparent);border-radius:.5rem;padding:.75rem 1rem;max-width:100%;overflow-x:auto;white-space:pre-wrap;word-break:break-word;text-align:left;margin:0 0 .5rem}.error-boundary__actions{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center}.home{position:relative;z-index:1;max-width:960px;margin:0 auto;padding:0 16px 48px;color:var(--ink);font-family:var(--font-body);--home-section-gap: 48px}@media(min-width:768px){.home{padding-left:40px;padding-right:40px}}@media(min-width:1280px){.home{padding-left:0;padding-right:0}}.home__section{margin-bottom:var(--home-section-gap)}.home__heading{font-family:var(--font-display);font-size:var(--text-h2);font-weight:500;letter-spacing:-.3px;margin:0 0 24px;color:var(--ink)}.home-hero{padding-top:40px;padding-bottom:16px}.home-hero__grid{display:grid;gap:32px;align-items:center}@media(min-width:768px){.home-hero__grid{grid-template-columns:1fr 1fr;gap:40px}}.home-hero__title{font-family:var(--font-display);font-size:var(--text-display);font-weight:500;letter-spacing:var(--tracking-display);line-height:var(--leading-display);margin:0 0 12px;text-wrap:pretty;color:var(--ink)}.home-hero__title-accent{font-family:var(--font-accent);font-style:italic;font-weight:400}.home-hero__subtitle{font-size:var(--text-h3);color:var(--ink-soft);line-height:1.5;margin:0 0 24px;max-width:380px}.home-hero__cta-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.home-hero__pricing-link{font-size:var(--text-body);color:var(--ink-soft);text-decoration:none;border-bottom:1px solid var(--glass-border);padding-bottom:2px;transition:color var(--duration-normal) var(--ease-out)}.home-hero__pricing-link:hover,.home-hero__pricing-link:focus-visible{color:var(--ink)}.home-hero__pricing-link:focus-visible{outline:2px solid var(--gold);outline-offset:4px;border-radius:2px}.home-hero__visual-card{padding:0;overflow:hidden}.home-hero__svg-wrap{padding:20px 20px 0}.home-hero__chips{padding:12px 16px 16px;display:flex;gap:8px;flex-wrap:wrap}.home-proof{overflow:hidden;position:relative;mask-image:linear-gradient(90deg,transparent 0,#000 32px,#000 calc(100% - 32px),transparent 100%);-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 32px,#000 calc(100% - 32px),transparent 100%)}.home-proof__track{display:flex;gap:10px;width:max-content;padding-bottom:4px;animation:home-proof-scroll 32s linear infinite}.home-proof:hover .home-proof__track,.home-proof:focus-within .home-proof__track{animation-play-state:paused}@keyframes home-proof-scroll{0%{transform:translate(0)}to{transform:translate(-50%)}}@media(prefers-reduced-motion:reduce){.home-proof__track{animation:none;width:100%;flex-wrap:wrap;justify-content:center}}.home-steps__grid{display:grid;gap:16px}@media(min-width:768px){.home-steps__grid{grid-template-columns:repeat(3,1fr)}}.home-step__label{font-family:var(--font-mono);font-size:var(--text-mono);letter-spacing:1.5px;color:var(--gold);margin:0 0 8px}.home-step__title{font-size:var(--text-h3);font-weight:500;margin:0 0 6px;color:var(--ink)}.home-step__desc{font-size:var(--text-body);color:var(--ink-soft);line-height:1.5;margin:0}.home-subjects__grid{display:grid;gap:16px}@media(min-width:600px){.home-subjects__grid{grid-template-columns:repeat(2,1fr)}}@media(min-width:1024px){.home-subjects__grid{grid-template-columns:repeat(4,1fr)}}.home-subject__head{display:flex;align-items:center;gap:10px;margin:0 0 10px}.home-subject__name{font-size:var(--text-body);font-weight:500;color:var(--ink)}.home-subject__example{font-size:var(--text-caption);color:var(--ink-soft);line-height:1.5;font-style:italic;margin:0}.home-bento__card{padding:0;overflow:hidden}.home-bento__grid{display:grid}.home-bento__cell{padding:24px;border-bottom:1px solid var(--glass-border)}.home-bento__cell:last-child{border-bottom:none}@media(min-width:600px)and (max-width:767px){.home-bento__grid{grid-template-columns:repeat(2,1fr)}.home-bento__cell{border-right:1px solid var(--glass-border)}.home-bento__cell:nth-child(2n){border-right:none}.home-bento__cell:nth-last-child(-n+2){border-bottom:none}}@media(min-width:768px){.home-bento__grid{grid-template-columns:repeat(3,1fr)}.home-bento__cell{border-right:1px solid var(--glass-border)}.home-bento__cell:nth-child(3n){border-right:none}.home-bento__cell:nth-child(n+4){border-bottom:none}}.home-bento__title{font-size:var(--text-body);font-weight:500;margin:0 0 4px;color:var(--ink)}.home-bento__desc{font-size:var(--text-caption);color:var(--ink-soft);line-height:1.5;margin:0}.home-comparison{text-align:center;padding:28px 24px}.home-comparison__lead{font-size:var(--text-h3);font-weight:500;font-family:var(--font-display);line-height:1.4;text-wrap:pretty;margin:0;color:var(--ink)}.home-comparison__accent{font-family:var(--font-accent);font-style:italic;color:var(--gold)}.home-testimonials__grid{display:grid;gap:16px}@media(min-width:768px){.home-testimonials__grid{grid-template-columns:repeat(2,1fr)}}.home-testimonial__quote{font-size:var(--text-body);line-height:1.6;margin:0 0 12px;font-style:italic;color:var(--ink)}.home-testimonial__attribution{font-size:var(--text-caption);color:var(--ink-soft);font-weight:500;margin:0}.home-closing{text-align:center;padding:40px 24px}.home-closing__title{font-family:var(--font-display);font-size:var(--text-h1);font-weight:500;letter-spacing:-.3px;line-height:1.2;margin:0 0 8px;text-wrap:pretty;color:var(--ink)}.home-closing__title-accent{font-family:var(--font-accent);font-style:italic;font-weight:400}.home-closing__subtitle{font-size:var(--text-body);color:var(--ink-soft);margin:0 0 24px}.home-footer{padding:24px 16px;display:flex;justify-content:center;gap:24px;flex-wrap:wrap;font-size:var(--text-caption);color:var(--ink-soft)}.home-footer__link{color:var(--ink-soft);text-decoration:none;border-bottom:1px solid transparent;transition:border-color var(--duration-normal) var(--ease-out),color var(--duration-normal) var(--ease-out)}.home-footer__link:hover{border-bottom-color:var(--ink-soft)}.home-footer__link:focus-visible{outline:2px solid var(--gold);outline-offset:4px;border-radius:2px}.home-footer__copy{opacity:.5}.login-page{position:relative;z-index:1;min-height:100vh;display:flex;flex-direction:column;color:var(--ink);font-family:var(--font-body)}.login-main{flex:1;display:flex;align-items:center;justify-content:center;padding:var(--sp-6) var(--sp-3) var(--sp-12)}.login-container{width:100%;max-width:420px}.login-card{width:100%;padding:var(--sp-8) var(--sp-6);animation:login-mount var(--duration-mount) var(--ease-out) both}@media(min-width:480px){.login-card{padding:var(--sp-8) var(--sp-8)}}@keyframes login-mount{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){.login-card{animation:none}}.login-header{text-align:center;margin-bottom:var(--sp-6)}.login-header__wordmark{font-family:var(--font-accent);font-style:italic;font-size:var(--text-h2);font-weight:500;color:var(--ink);margin-bottom:var(--sp-3)}.login-header__title{font-family:var(--font-display);font-size:var(--text-h2);font-weight:500;letter-spacing:-.3px;margin:0 0 var(--sp-1);color:var(--ink)}.login-header__subtitle{font-size:var(--text-body);color:var(--fg-secondary);line-height:1.4;margin:0}.login-tab-body{display:flex;flex-direction:column;gap:var(--sp-4)}.login-google-button{display:flex;align-items:center;justify-content:center;gap:var(--sp-2);width:100%}.login-google-icon{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}.login-microsoft-button{display:flex;align-items:center;justify-content:center;gap:var(--sp-2);width:100%}.login-microsoft-icon{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}.login-age16{display:flex;align-items:flex-start;gap:var(--sp-2);font-size:var(--text-body);color:var(--fg-primary);cursor:pointer;-webkit-user-select:none;user-select:none}.login-age16__input{width:18px;height:18px;accent-color:var(--gold);cursor:pointer;flex:0 0 auto;margin-top:2px}.login-age16__text{line-height:1.4}.login-age16__error{font-size:var(--text-caption);color:var(--color-error);margin:var(--sp-1) 0 0}.login-age16__helper{font-size:var(--text-caption);color:var(--fg-secondary);margin:var(--sp-1) 0 0 26px;line-height:1.4}.login-footer{font-family:var(--font-mono);font-size:var(--text-mono);color:var(--fg-secondary);text-align:center;margin-top:var(--sp-5);line-height:1.5}.login-footer--dpdp{margin-top:var(--sp-3);opacity:.85}.login-footer__link{color:var(--fg-secondary);text-decoration:underline;text-underline-offset:2px}.login-footer__link:hover,.login-footer__link:focus-visible{color:var(--ink)}.login-toast{margin-top:.75rem;padding:.625rem 1rem;background:#dc3c3c1a;border:1px solid rgba(220,60,60,.2);border-radius:.5rem;color:var(--ink);font-size:var(--text-body);text-align:center;animation:login-toast-mount .24s var(--ease-out, cubic-bezier(.16, 1, .3, 1)) both}@keyframes login-toast-mount{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.not-found{position:relative;min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:1.5rem}.not-found__card{position:relative;z-index:1;max-width:28rem;width:100%;text-align:center;display:flex;flex-direction:column;align-items:center;gap:.75rem;padding:2.5rem 2rem}.not-found__eyebrow{font-family:JetBrains Mono,monospace;font-size:var(--text-mono, .75rem);color:var(--ink-soft);letter-spacing:.08em;margin:0}.not-found__title{font-family:DM Sans,sans-serif;font-size:var(--text-h2, 1.375rem);font-weight:500;color:var(--ink);margin:0;letter-spacing:-.02em}.not-found__body{font-family:Inter,sans-serif;font-size:var(--text-body, 1rem);color:var(--ink-soft);line-height:1.5;margin:0 0 .5rem}:root{color-scheme:light dark}:root{--font-display: "DM Sans", sans-serif;--font-body: "Inter", sans-serif;--font-accent: "Cormorant Garamond", serif;--font-mono: "JetBrains Mono", monospace;--fw-regular: 400;--fw-medium: 500;--fw-semibold: 600;--fw-bold: 700;--text-display: 32px;--text-h1: 28px;--text-h2: 22px;--text-h3: 18px;--text-body: 16px;--text-caption: 12px;--text-mono: 11px;--leading-body: 1.5;--leading-display: 1.15;--tracking-display: -.4px;--color-error: #C95C5C;--color-success: #2E8B57;--color-warning: #C9A45C;--gold: #C9A45C;--subject-physics: #6BB8FF;--subject-chemistry: #FF9DC9;--subject-maths: #6FE3B8;--subject-biology: #FFB890;--sp-1: 4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-5: 20px;--sp-6: 24px;--sp-8: 32px;--sp-10: 40px;--sp-12: 48px;--sp-16: 64px;--radius-sm: 12px;--radius-md: 18px;--radius-lg: 24px;--radius-xl: 28px;--radius-pill: 9999px;--duration-fast: .1s;--duration-normal: .18s;--duration-mount: .24s;--duration-page: .3s;--duration-aurora: 60s;--ease-out: cubic-bezier(.16, 1, .3, 1)}:root,[data-theme=light]{--aurora-bg: linear-gradient(135deg, #FFE4F1 0%, #E0E7FF 35%, #D6F5FF 70%, #E8FFE0 100%);--aurora-bloom-1: rgba(255, 180, 250, .6);--aurora-bloom-2: rgba(180, 220, 255, .6);--glass-bg: rgba(255, 255, 255, .55);--glass-bg-faint: rgba(255, 255, 255, .15);--glass-bg-opaque: rgba(255, 255, 255, .85);--glass-border: rgba(255, 255, 255, .7);--glass-shadow: 0 8px 24px rgba(26, 26, 46, .08);--glass-blur: 28px;--ink: #1A1A2E;--ink-soft: #4A4A6E;--fg-primary: var(--ink);--fg-secondary: var(--ink-soft);--bg-surface: var(--glass-bg);--border-surface: var(--glass-border);--shadow-surface: var(--glass-shadow);--btn-primary-bg: rgba(255, 255, 255, .7);--btn-secondary-bg: transparent}[data-theme=dark]{--aurora-bg: linear-gradient(135deg, #161616 0%, #1A1A1A 35%, #181818 70%, #141414 100%);--aurora-bloom-1: rgba(200, 160, 100, .1);--aurora-bloom-2: rgba(180, 150, 130, .08);--glass-bg: rgba(255, 250, 240, .04);--glass-bg-faint: rgba(255, 250, 240, .02);--glass-bg-opaque: rgba(30, 25, 50, .9);--glass-border: rgba(255, 250, 240, .08);--glass-shadow: 0 8px 24px rgba(0, 0, 0, .35);--ink: #EDEBE8;--ink-soft: #918B82;--fg-primary: var(--ink);--fg-secondary: var(--ink-soft);--bg-surface: var(--glass-bg);--border-surface: var(--glass-border);--shadow-surface: var(--glass-shadow);--btn-primary-bg: rgba(255, 255, 255, .12);--btn-secondary-bg: transparent}@media(prefers-reduced-transparency:reduce){:root,[data-theme=light],[data-theme=dark]{--glass-bg: var(--glass-bg-opaque);--glass-bg-faint: var(--glass-bg-opaque);--glass-blur: 0px}}@media(prefers-reduced-motion:reduce){*{animation-duration:0s!important;transition-duration:0s!important}}@media(min-width:768px){:root{--text-display: 48px;--text-h1: 36px;--text-h2: 28px;--text-h3: 22px;--text-caption: 13px;--text-mono: 12px}}html{background:var(--aurora-bg);color:var(--fg-primary);font-family:var(--font-body)}body,#root{min-height:100%;margin:0;background:transparent}