@layer theme{:root,:host{--font-sans:ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";--font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier 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optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab,currentcolor 50%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.block{display:block}}:root{--bg:#f3f6fb;--surface:#fffffff0;--surface-solid:#fff;--ink:#111827;--muted:#667085;--border:#e4e9f2;--primary:#3157d5;--primary-dark:#2442aa;--primary-soft:#eaf0ff;--success:#16845b;--danger:#c33c4a;--shadow:0 18px 50px #1523461a}*{box-sizing:border-box}html{background:var(--bg)}body{background:radial-gradient(circle at 10% -10%,#4563dd1c,transparent 30rem),radial-gradient(circle at 100% 10%,#50aeff14,transparent 26rem),var(--bg);min-height:100vh;color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:Arial,Helvetica,sans-serif}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.58}.login-shell{background:linear-gradient(145deg,#eef3ff 0%,#f8fbff 45%,#eff5fb 100%);place-items:center;min-height:100vh;padding:28px;display:grid;position:relative;overflow:hidden}.login-orb{filter:blur(2px);opacity:.75;border-radius:999px;position:absolute}.login-orb-one{background:#4866dc1f;width:420px;height:420px;top:-130px;left:-150px}.login-orb-two{background:#59c0ff1a;width:360px;height:360px;bottom:-100px;right:-110px}.login-card{z-index:1;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#ffffffe0;border:1px solid #ffffffe6;border-radius:28px;width:min(100%,440px);padding:38px;position:relative;box-shadow:0 30px 90px #2d417824}.brand-mark{color:#fff;letter-spacing:-.04em;background:linear-gradient(145deg,#3e64df,#2748bb);border-radius:16px;place-items:center;width:52px;height:52px;margin-bottom:24px;font-weight:800;display:grid;box-shadow:0 12px 25px #3157d53d}.brand-mark.small{border-radius:13px;width:42px;height:42px;margin:0;font-size:14px}.eyebrow{color:var(--primary);letter-spacing:.16em;margin-bottom:9px;font-size:12px;font-weight:800}.login-card h1,.hero-copy h1,.editor-heading h1{letter-spacing:-.045em;margin:0}.login-card h1{font-size:34px}.muted-copy,.hero-copy p,.editor-heading p{color:var(--muted);line-height:1.65}.muted-copy{margin:10px 0 28px}.login-form{gap:17px;display:grid}.login-form label,.field-label{color:#344054;gap:8px;font-size:13px;font-weight:700;display:grid}input,textarea,select{border:1px solid var(--border);width:100%;color:var(--ink);background:#fff;border-radius:12px;outline:none;transition:border-color .18s,box-shadow .18s}input,select{min-height:44px;padding:0 13px}textarea{resize:vertical;padding:12px 13px;line-height:1.55}input:focus,textarea:focus,select:focus{border-color:#8da5ef;box-shadow:0 0 0 4px #3157d517}.error-box,.notice-box{border-radius:12px;padding:12px 14px;font-size:13px;line-height:1.45}.error-box,.notice-box.error{color:#a22d3a;background:#fff0f2;border:1px solid #ffd4da}.notice-box.success{color:#126548;background:#ebfbf4;border:1px solid #c9efdf}.security-note{color:#7a8497;text-align:center;margin-top:24px;font-size:12px}.security-note span{color:#31a36f;font-size:10px}.primary-button,.secondary-button,.ghost-button,.icon-button,.text-button{border:0;border-radius:11px;font-weight:750;transition:transform .15s,background .15s,box-shadow .15s}.primary-button{background:var(--primary);color:#fff;padding:12px 17px;box-shadow:0 9px 20px #3157d52e}.primary-button:hover:not(:disabled){background:var(--primary-dark);transform:translateY(-1px)}.secondary-button{color:#344054;border:1px solid var(--border);background:#fff;padding:11px 16px}.secondary-button:hover:not(:disabled),.ghost-button:hover{background:#f8faff}.ghost-button{color:#475467;border:1px solid var(--border);background:0 0;padding:10px 13px}.icon-button{border:1px solid var(--border);color:#475467;background:#fff;width:39px;height:39px}.text-button{color:var(--primary);text-align:left;background:0 0;padding:6px 0}.full-width{width:100%}.app-shell{min-height:100vh}.topbar{-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);z-index:20;background:#ffffffc2;border-bottom:1px solid #dce2ede6;justify-content:space-between;align-items:center;gap:18px;height:76px;padding:0 clamp(20px,4vw,56px);display:flex;position:sticky;top:0}.brand-row,.top-actions{align-items:center;gap:12px;display:flex}.topbar-title{letter-spacing:-.02em;font-weight:800}.topbar-subtitle{color:var(--muted);margin-top:2px;font-size:12px}.user-chip{background:var(--primary-soft);color:#2b4ebb;border-radius:999px;padding:8px 12px;font-size:12px;font-weight:800}.dashboard-wrap{max-width:1180px;margin:0 auto;padding:58px 24px 80px}.hero-copy{max-width:690px;margin-bottom:34px}.hero-copy h1{font-size:clamp(38px,5vw,62px);line-height:.98}.hero-copy 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small{color:#7a8497}.mini-stats{grid-template-columns:1fr 1fr;gap:8px;display:grid}.mini-stats div{border-top:1px solid var(--border);gap:2px;padding-top:13px;display:grid}.mini-stats strong{font-size:19px}.mini-stats span{color:var(--muted);font-size:11px}.card-stage{min-width:0}.empty-card{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:475px;padding:38px;display:flex}.empty-card h2{letter-spacing:-.025em;margin:12px 0 4px}.empty-card p{color:var(--muted);max-width:430px;margin:4px 0 20px;line-height:1.6}.empty-icon{background:var(--primary-soft);width:66px;height:66px;color:var(--primary);border-radius:20px;place-items:center;font-size:28px;display:grid}.error-text{color:var(--danger)}.flip-card{perspective:1300px;cursor:pointer;min-height:475px}.flip-card-inner{width:100%;min-height:475px;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.2,.7,.2,1);position:relative}.flip-card.is-flipped .flip-card-inner{transform:rotateY(180deg)}.flip-face{backface-visibility:hidden;background:var(--surface-solid);border:1px solid var(--border);min-height:475px;box-shadow:var(--shadow);border-radius:22px;flex-direction:column;display:flex;position:absolute;inset:0;overflow:hidden}.flip-back{transform:rotateY(180deg)}.card-media{border-bottom:1px solid var(--border);background:#f6f8fc;height:190px;padding:14px}.card-media img{object-fit:contain;border-radius:11px;width:100%;height:100%}.card-content{flex-direction:column;flex:1;padding:clamp(24px,4vw,42px);display:flex}.category-pill{background:var(--primary-soft);color:#3455bf;border-radius:999px;align-self:flex-start;padding:7px 10px;font-size:11px;font-weight:800}.category-pill.answer{color:#167554;background:#eaf9f3}.card-kicker{color:#98a2b3;letter-spacing:.18em;margin:24px 0 9px;font-size:11px;font-weight:800}.card-content h2{letter-spacing:-.035em;max-width:800px;margin:0;font-size:clamp(24px,3vw,36px);line-height:1.25}.answer-copy{color:#155d46;font-size:clamp(18px,2vw,23px);font-weight:650;line-height:1.5}.answer-copy p{margin:0 0 9px}.flip-hint{color:#8a94a6;justify-content:space-between;gap:10px;margin-top:auto;padding-top:24px;font-size:12px;display:flex}.flip-hint span{color:var(--primary);font-weight:800}.card-controls{justify-content:flex-end;gap:10px;margin-top:14px;display:flex}.editor-wrap{max-width:1120px;margin:0 auto;padding:48px 24px 110px}.editor-heading{justify-content:space-between;align-items:flex-end;gap:22px;margin-bottom:26px;display:flex}.editor-heading h1{font-size:clamp(34px,4vw,50px)}.editor-heading p{margin:8px 0 0}.editor-actions{flex-shrink:0;gap:10px;display:flex}.editor-toolbar{z-index:10;grid-template-columns:1fr 250px auto;align-items:center;gap:10px;padding:13px;display:grid;position:sticky;top:88px}.result-count{text-align:center;min-width:72px;color:var(--muted);font-size:13px}.result-count strong{color:var(--ink)}.notice-box{margin-top:14px}.editor-loading{text-align:center;color:var(--muted);margin-top:18px;padding:32px}.question-list{gap:16px;margin-top:18px;display:grid}.question-editor-card{padding:20px}.editor-card-topline{align-items:center;gap:10px;margin-bottom:17px;display:flex}.question-number{background:var(--primary-soft);width:36px;height:30px;color:var(--primary);border-radius:9px;place-items:center;font-size:12px;font-weight:800;display:grid}.id-label{color:#98a2b3;font-size:11px}.danger-link{color:var(--danger);background:0 0;border:0;margin-left:auto;font-size:12px;font-weight:700}.field-grid{grid-template-columns:210px 1fr;gap:15px;display:grid}.question-field{grid-area:1/2/span 2}.answer-field{grid-column:1/-1}.field-label small{color:#98a2b3;font-weight:500}.image-editor{border-top:1px solid var(--border);grid-template-columns:150px 1fr;align-items:center;gap:16px;margin-top:16px;padding-top:16px;display:grid}.image-preview{background:#f8fafc;border:1px dashed #cfd6e3;border-radius:13px;height:100px;overflow:hidden}.image-preview img{object-fit:contain;width:100%;height:100%}.image-placeholder{color:#98a2b3;place-items:center;width:100%;height:100%;font-size:12px;display:grid}.image-actions{flex-wrap:wrap;align-items:center;gap:9px;display:flex}.image-actions strong{width:100%;font-size:13px}.image-actions span{width:100%;color:var(--muted);font-size:11px}.file-button{align-items:center;display:inline-flex}.file-button input{display:none}.save-dock{color:#fff;opacity:0;pointer-events:none;z-index:30;background:#171d2c;border-radius:16px;align-items:center;gap:22px;padding:10px 10px 10px 18px;font-size:13px;transition:all .25s;display:flex;position:fixed;bottom:22px;left:50%;transform:translate(-50%,120px);box-shadow:0 20px 45px #0d142447}.save-dock.visible{opacity:1;pointer-events:auto;transform:translate(-50%)}@media (max-width:820px){.topbar{height:auto;min-height:70px;padding:11px 16px}.topbar-subtitle,.user-chip{display:none}.dashboard-wrap,.editor-wrap{padding-left:15px;padding-right:15px}.dashboard-wrap{padding-top:36px}.study-grid{grid-template-columns:1fr}.study-sidebar{position:static}.editor-heading{flex-direction:column;align-items:stretch}.editor-actions{width:100%}.editor-actions button{flex:1}.editor-toolbar{grid-template-columns:1fr;position:static}.result-count{text-align:left;padding:4px 3px}.field-grid{grid-template-columns:1fr}.question-field,.answer-field{grid-area:auto/1}.image-editor{grid-template-columns:1fr}.image-preview{height:170px}.save-dock{justify-content:space-between;gap:10px;width:calc(100% - 24px)}.save-dock span{font-size:11px}}@media (max-width:560px){.login-card{border-radius:22px;padding:28px 22px}.login-card h1{font-size:30px}.top-actions{gap:7px}.top-actions .ghost-button{padding:9px;font-size:11px}.hero-copy h1{font-size:40px}.flip-card,.flip-card-inner,.flip-face{min-height:430px}.card-controls{grid-template-columns:1fr 1fr;display:grid}.card-controls button{padding-left:8px;padding-right:8px}.editor-actions{grid-template-columns:1fr;display:grid}.image-actions{align-items:stretch}.image-actions .secondary-button{justify-content:center}.save-dock span{display:none}.save-dock button{width:100%}}html{-webkit-text-size-adjust:100%;min-height:100%}body{overscroll-behavior-y:none;-webkit-tap-highlight-color:transparent;min-height:100dvh}button,a,select,input,textarea{touch-action:manipulation}.flip-card{touch-action:pan-y}.learning-hero{margin-bottom:24px}.learning-hero h1{font-size:clamp(32px,4.5vw,50px);line-height:1}@media (max-width:820px){.app-shell{min-height:100dvh}.topbar{padding-top:max(11px,env(safe-area-inset-top))}.dashboard-wrap{padding-top:24px;padding-bottom:calc(96px + env(safe-area-inset-bottom))}.editor-wrap{padding-bottom:calc(118px + env(safe-area-inset-bottom))}.learning-hero{margin-bottom:16px}.learning-hero h1{font-size:32px}.study-grid{gap:16px}.study-sidebar{border-radius:18px;gap:12px;padding:16px}.study-sidebar select,.study-sidebar button,.editor-toolbar input,.editor-toolbar select,.login-form input{min-height:48px}.primary-button,.secondary-button,.ghost-button,.icon-button{min-height:44px}.card-stage{width:100%}.flip-card,.flip-card-inner{height:clamp(430px,62dvh,620px);min-height:430px}.flip-face{overscroll-behavior:auto;-webkit-overflow-scrolling:touch;touch-action:pan-y;height:100%;min-height:0;overflow-y:visible}.card-content{padding:24px 22px}.card-media{flex:none;height:clamp(150px,26dvh,205px)}.card-content h2{font-size:clamp(23px,6vw,32px);line-height:1.25}.answer-copy{font-size:clamp(18px,4.8vw,22px);line-height:1.48}.card-controls{z-index:12;padding:10px 4px calc(10px + env(safe-area-inset-bottom));background:linear-gradient(to top,var(--bg)72%,#f3f6fb00);margin:12px -4px 0;position:sticky;bottom:0}.card-controls button{min-height:50px}.question-editor-card{padding:16px}.editor-card-topline{margin-bottom:14px}.field-label input,.field-label textarea{font-size:16px}.save-dock{bottom:calc(12px + env(safe-area-inset-bottom))}}@media (max-width:560px){.login-shell{min-height:100dvh;padding:max(16px,env(safe-area-inset-top))14px max(16px,env(safe-area-inset-bottom));align-items:center}.login-card{width:100%;padding:26px 20px}.login-form input,input,select,textarea{font-size:16px}.brand-mark.small{width:40px;height:40px}.topbar{gap:10px;padding-left:12px;padding-right:12px}.topbar-title{font-size:15px}.top-actions .ghost-button{min-height:40px;padding:8px 10px}.icon-button{width:40px;min-width:40px;height:40px}.dashboard-wrap,.editor-wrap{padding-left:12px;padding-right:12px}.dashboard-wrap{padding-top:18px}.learning-hero{margin-bottom:13px}.learning-hero h1{letter-spacing:-.035em;font-size:28px}.study-sidebar{border-radius:16px;padding:14px}.stat-card{padding:13px}.mini-stats{gap:12px}.flip-card,.flip-card-inner{height:clamp(400px,60dvh,560px);min-height:400px}.flip-face{border-radius:18px}.card-media{height:clamp(135px,23dvh,180px);padding:10px}.card-content{padding:20px 18px}.card-kicker{margin-top:18px}.flip-hint{padding-top:18px}.empty-card{border-radius:18px;min-height:390px;padding:28px 20px}.card-controls{grid-template-columns:1fr 1fr;gap:8px}.card-controls .primary-button,.card-controls .secondary-button{padding:11px 8px;font-size:14px}.editor-heading{margin-bottom:18px}.editor-heading h1{font-size:32px}.editor-toolbar{border-radius:16px;padding:10px}.question-editor-card{border-radius:16px}.image-preview{height:150px}}@media (display-mode:standalone){.topbar{padding-top:max(11px,env(safe-area-inset-top))}}