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18px}.stat-label{font-family:var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--gray-3);font-size:10px;font-weight:500}.stat-value{font-family:var(--sans);letter-spacing:-.035em;color:var(--ink);font-variant-numeric:tabular-nums;margin-top:6px;font-size:28px;font-weight:500;line-height:1.1}.stat-delta{font-size:11px;font-family:var(--mono);font-variant-numeric:tabular-nums;margin-top:6px}.stat-delta.up{color:var(--success)}.stat-delta.down{color:var(--danger)}.course-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);cursor:pointer;flex-direction:column;text-decoration:none;transition:border-color .12s,transform .15s;display:flex;overflow:hidden}.course-card:hover{border-color:var(--line-2);transform:translateY(-1px)}.course-card-cover{align-items:center;height:72px;padding:14px 16px;display:flex;position:relative;overflow:hidden}.course-card-cover-inner{font-family:var(--mono);letter-spacing:.1em;color:var(--gray-4);text-transform:uppercase;font-size:11px;font-weight:500}.course-card-texture{background-image:linear-gradient(90deg,#ffffff08 1px,#0000 1px);background-size:8px 100%;position:absolute;inset:0}.course-card-body{padding:14px 16px 16px}.course-code{font-family:var(--mono);letter-spacing:.06em;color:var(--gray-3);text-transform:uppercase;font-size:10.5px;font-weight:500}.course-name{font-family:var(--sans);letter-spacing:-.015em;color:var(--ink);margin-top:3px;font-size:14.5px;font-weight:500;line-height:1.3}.course-meta{color:var(--gray-3);font-size:11px;font-family:var(--mono);gap:12px;margin-top:10px;display:flex}.course-hero{background:var(--ink);color:#fafafa;border-radius:var(--r-lg);justify-content:space-between;align-items:flex-end;gap:40px;padding:28px 32px;display:flex;position:relative;overflow:hidden}.course-hero-bg{font-family:var(--mono);color:var(--gray-4);pointer-events:none;letter-spacing:.12em;text-transform:uppercase;font-size:11px;font-weight:500;position:absolute;top:24px;right:32px}.course-hero-content{z-index:1;position:relative}.course-hero-code{font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--gray-4);font-size:10.5px;font-weight:500}.course-hero-name{font-family:var(--sans);letter-spacing:-.035em;color:#fff;margin-top:8px;font-size:32px;font-weight:500;line-height:1.1}.course-hero-meta{color:var(--gray-4);font-size:12.5px;font-family:var(--mono);margin-top:10px}.course-hero-stats{z-index:1;align-items:flex-end;gap:32px;display:flex;position:relative}.course-hero-stat-label{font-family:var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--gray-4);font-size:10px;font-weight:500}.course-hero-stat-val{font-family:var(--sans);color:#fff;letter-spacing:-.03em;font-variant-numeric:tabular-nums;margin-top:4px;font-size:22px;font-weight:500}.tool-card{border-radius:var(--r-lg);cursor:pointer;border:1px solid var(--line);background:var(--surface);min-height:130px;color:inherit;flex-direction:column;gap:12px;padding:18px 20px;text-decoration:none;transition:all .12s;display:flex}.tool-card:hover{border-color:var(--line-2);transform:translateY(-1px)}.tool-card-ink{background:var(--ink);color:#fafafa;border-color:var(--ink)}.tool-card-ink:hover{background:var(--ink-2);border-color:var(--ink-2)}.tool-icon{background:var(--surface-2);width:30px;height:30px;color:var(--ink);border-radius:4px;justify-content:center;align-items:center;display:flex}.tool-card-ink .tool-icon{background:var(--ink-3);color:#fff}.tool-title{font-family:var(--sans);letter-spacing:-.015em;color:var(--ink);font-size:14.5px;font-weight:500}.tool-card-ink .tool-title{color:#fff}.tool-desc{color:var(--gray-2);font-size:12px;line-height:1.5}.tool-card-ink .tool-desc{color:var(--gray-4)}.tabs{border-bottom:1px solid var(--line);gap:2px;margin-bottom:24px;display:flex}.tab{color:var(--gray-2);cursor:pointer;border-bottom:1.5px solid #0000;margin-bottom:-1px;padding:10px 14px;font-size:12.5px;font-weight:500;transition:color .1s,border-color .1s}.tab:hover{color:var(--ink)}.tab.active{color:var(--ink);border-bottom-color:var(--ink)}.tab-count{font-family:var(--mono);color:var(--gray-4);margin-left:4px;font-size:10.5px}.module-item{align-items:flex-start;gap:14px;padding:12px 0;display:flex}.module-item+.module-item{border-top:1px solid var(--line)}.module-num{font-family:var(--mono);color:var(--gray-3);letter-spacing:.04em;min-width:28px;padding-top:3px;font-size:11px;font-weight:500;line-height:1.3}.module-title{color:var(--ink);font-size:13.5px;font-weight:500}.module-sub{color:var(--gray-3);font-size:11px;font-family:var(--mono);margin-top:3px}.progress{background:var(--surface-2);border-radius:2px;height:3px;overflow:hidden}.progress-fill{background:var(--ink);border-radius:2px;height:100%}.file-item{align-items:center;gap:12px;padding:9px 0;display:flex}.file-item+.file-item{border-top:1px solid var(--line)}.file-ext{background:var(--surface-2);width:30px;height:30px;color:var(--gray-2);font-family:var(--mono);text-transform:uppercase;border:1px solid var(--line);border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;font-size:9.5px;font-weight:600;display:flex}.file-name{color:var(--ink);font-size:12.5px;font-weight:500}.file-meta{color:var(--gray-3);font-size:10.5px;font-family:var(--mono);margin-top:2px}.tutor-layout{grid-template-columns:240px 1fr;gap:16px;height:calc(100vh - 80px);min-height:560px;display:grid}.tutor-sidebar{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:14px;overflow-y:auto}.tutor-sidebar-label{font-family:var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--gray-3);padding:6px 10px;font-size:10px;font-weight:500}.tutor-sidebar-item{cursor:pointer;color:var(--gray-1);border-radius:4px;align-items:center;gap:8px;padding:6px 10px;font-size:12.5px;display:flex}.tutor-sidebar-item:hover{background:var(--surface-2);color:var(--ink)}.tutor-sidebar-item.active{background:var(--surface-2);color:var(--ink);font-weight:500}.tutor-main{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);flex-direction:column;display:flex;overflow:hidden}.tutor-header{border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:14px 20px;display:flex}.tutor-messages{flex-direction:column;flex:1;gap:18px;padding:22px 26px;display:flex;overflow-y:auto}.msg{gap:14px;max-width:100%;display:flex}.msg-avatar{width:24px;height:24px;font-family:var(--mono);border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;margin-top:2px;font-size:10px;font-weight:600;display:flex}.msg-avatar.tutor{background:var(--ink);color:var(--bg)}.msg-avatar.user{background:var(--surface-2);color:var(--ink);border:1px solid var(--line)}.msg-body{color:var(--ink-2);font-size:13.5px;line-height:1.6}.tutor-input-bar{border-top:1px solid var(--line);background:var(--surface);align-items:flex-end;gap:8px;padding:12px 16px;display:flex}.tutor-input{border:1px solid var(--line-2);background:var(--surface);resize:none;min-height:38px;max-height:160px;color:var(--ink);border-radius:4px;flex:1;padding:9px 12px;font-size:13.5px;line-height:1.4;transition:border-color .1s,box-shadow .1s}.tutor-input:focus{border-color:var(--ink);box-shadow:0 0 0 3px var(--accent-glow);outline:none}.streaming-cursor{background:var(--ink);vertical-align:middle;width:6px;height:12px;margin-left:2px;animation:1s step-end infinite blink;display:inline-block}@keyframes blink{50%{opacity:0}}.flashcard-stage{max-width:660px;margin:0 auto}.flashcard-progress{font-family:var(--mono);color:var(--gray-3);justify-content:space-between;align-items:center;margin-bottom:18px;padding:0 4px;font-size:11px;display:flex}.flashcard-container{perspective:1600px;height:340px}.flashcard-inner{width:100%;height:100%;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,0,.2,1);position:relative}.flashcard-inner.flipped{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;border-radius:var(--r-xl);text-align:center;border:1px solid var(--line);flex-direction:column;justify-content:center;align-items:center;padding:36px 48px;display:flex;position:absolute;inset:0}.flashcard-face.front{background:var(--surface)}.flashcard-face.back{background:var(--ink);color:#fafafa;border-color:var(--ink);transform:rotateY(180deg)}.flashcard-face-label{font-family:var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--gray-3);font-size:10px;font-weight:500}.flashcard-face.back .flashcard-face-label{color:var(--gray-4)}.flashcard-front-term{font-family:var(--sans);letter-spacing:-.035em;max-width:90%;color:var(--ink);margin-top:14px;font-size:30px;font-weight:500;line-height:1.2}.flashcard-back-def{color:#fafafa;max-width:90%;margin-top:14px;font-size:15px;line-height:1.6}.flashcard-hook{background:var(--ink-3);border:1px solid var(--ink-2);color:var(--gray-4);border-radius:4px;max-width:90%;margin-top:20px;padding:10px 14px;font-size:12.5px}.flashcard-ratings{grid-template-columns:repeat(4,1fr);gap:8px;margin-top:22px;display:grid}.rating-btn{border:1px solid var(--line);background:var(--surface);border-radius:4px;flex-direction:column;align-items:center;gap:4px;padding:12px 8px;font-size:12px;font-weight:500;transition:all .1s;display:flex}.rating-btn:hover{border-color:var(--ink)}.rating-btn .key{font-family:var(--mono);color:var(--gray-3);margin-top:3px;font-size:10px}.rating-btn.again{color:var(--danger)}.rating-btn.hard{color:var(--warn)}.rating-btn.good{color:var(--info)}.rating-btn.easy{color:var(--success)}.quiz-stage{max-width:760px;margin:0 auto}.quiz-progress-bar{background:var(--line);border-radius:2px;height:2px;margin-bottom:24px;overflow:hidden}.quiz-progress-bar-fill{background:var(--ink);height:100%;transition:width .4s cubic-bezier(.4,0,.2,1)}.quiz-question-num{font-family:var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--gray-3);font-size:10.5px;font-weight:500}.quiz-question{font-family:var(--sans);letter-spacing:-.03em;color:var(--ink);margin-top:10px;font-size:22px;font-weight:500;line-height:1.25}.quiz-options{flex-direction:column;gap:8px;margin-top:24px;display:flex}.quiz-option{border:1px solid var(--line);background:var(--surface);cursor:pointer;text-align:left;border-radius:4px;align-items:flex-start;gap:12px;width:100%;padding:12px 16px;transition:all .1s;display:flex}.quiz-option:hover{border-color:var(--ink)}.quiz-option.selected{border-color:var(--ink);background:var(--surface-2)}.quiz-option.correct{border-color:var(--success);background:var(--success-wash)}.quiz-option.wrong{border-color:var(--danger);background:var(--danger-wash)}.quiz-option.disabled{cursor:default}.quiz-option-letter{background:var(--surface-2);width:22px;height:22px;color:var(--gray-2);font-family:var(--mono);border:1px solid var(--line);border-radius:3px;flex-shrink:0;justify-content:center;align-items:center;font-size:11px;font-weight:500;display:flex}.quiz-option.selected .quiz-option-letter{background:var(--ink);color:var(--bg);border-color:var(--ink)}.quiz-option.correct .quiz-option-letter{background:var(--success);color:#fff;border-color:var(--success)}.quiz-option.wrong .quiz-option-letter{background:var(--danger);color:#fff;border-color:var(--danger)}.quiz-option-text{color:var(--ink);padding-top:2px;font-size:13.5px;line-height:1.5}.quiz-explanation{background:var(--surface-2);border:1px solid var(--line);border-left:2px solid var(--ink);border-radius:4px;margin-top:18px;padding:14px 16px;font-size:13px;line-height:1.55}.quiz-explanation-label{font-family:var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--gray-3);margin-bottom:6px;font-size:10px;font-weight:500}.upcoming-item{grid-template-columns:44px 1fr auto;align-items:center;gap:14px;padding:12px 0;display:grid}.upcoming-item+.upcoming-item{border-top:1px solid var(--line)}.stack{flex-direction:column;display:flex}.row{align-items:center;display:flex}.between{justify-content:space-between}.gap-4{gap:4px}.gap-6{gap:6px}.gap-8{gap:8px}.gap-10{gap:10px}.gap-12{gap:12px}.gap-16{gap:16px}.gap-20{gap:20px}.gap-24{gap:24px}.gap-32{gap:32px}.mt-4{margin-top:4px}.mt-8{margin-top:8px}.mt-12{margin-top:12px}.mt-16{margin-top:16px}.mt-20{margin-top:20px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}.mt-40{margin-top:40px}.grow{flex-grow:1}.muted{color:var(--gray-3)}.muted-2{color:var(--gray-2)}.mono{font-family:var(--mono)}.tiny{font-size:10.5px}.small{font-size:12px}.h1{font-family:var(--sans);letter-spacing:-.03em;color:var(--ink);font-size:30px;font-weight:500;line-height:1.1}.h2{font-family:var(--sans);letter-spacing:-.025em;color:var(--ink);font-size:22px;font-weight:500;line-height:1.15}.h3{font-family:var(--sans);letter-spacing:-.015em;color:var(--ink);font-size:17px;font-weight:500;line-height:1.2}.h4{letter-spacing:-.005em;color:var(--ink);font-size:13.5px;font-weight:600}.divider{background:var(--line);height:1px;margin:20px 0}.text-center{text-align:center}.grid-2{gap:var(--gap);grid-template-columns:repeat(2,1fr);display:grid}.grid-3{gap:var(--gap);grid-template-columns:repeat(3,1fr);display:grid}.grid-4{gap:var(--gap);grid-template-columns:repeat(4,1fr);display:grid}.gradient-text{color:var(--ink);font-weight:500}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--surface-3);border:2px solid var(--bg);border-radius:10px}::-webkit-scrollbar-thumb:hover{background:var(--gray-4)}.course-dot{border-radius:50%;flex-shrink:0;width:6px;height:6px}.signed-out-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:16px 32px;display:flex}body:has(.onboard-shell) .signed-out-header{display:none}:root{--gold:#b4975b;--gold-soft:#d4c49a;--gold-deep:#9a7f4a;--gold-wash:#b4975b14;--ivory:#faf9f5}.onboard-shell{grid-template-columns:1fr 1fr;min-height:100vh;display:grid}.onboard-brand{background:var(--ink);color:#fafafa;flex-direction:column;padding:48px 56px;display:flex;position:relative;overflow:hidden}.onboard-brand-top{justify-content:space-between;align-items:center;display:flex}.onboard-brand-top .wordmark{color:#fff}.onboard-brand-top .monogram{background:var(--gold);color:var(--ink)}.onboard-brand-content{max-width:460px;margin-top:auto;margin-bottom:auto}.onboard-hero-title{font-family:var(--sans);letter-spacing:-.04em;color:#fff;margin-top:14px;font-size:46px;font-weight:500;line-height:1.08}.onboard-hero-title em{color:var(--gold-soft);font-style:normal}.onboard-hero-sub{color:var(--gray-4);max-width:420px;margin-top:20px;font-size:14.5px;line-height:1.65}.onboard-quote{border-left:2px solid var(--gold);border-radius:0 var(--r-md) var(--r-md) 0;background:#ffffff08;margin-top:40px;padding:20px 22px}.onboard-quote p{color:#ffffffd9;font-size:14px;font-style:italic;line-height:1.55}.onboard-quote cite{color:var(--gray-4);margin-top:10px;font-size:12px;font-style:normal;display:block}.onboard-trust{font-size:11.5px;font-family:var(--mono);letter-spacing:.04em;text-transform:uppercase;color:var(--gray-4);flex-wrap:wrap;gap:18px;display:flex}.onboard-trust span{align-items:center;gap:7px;display:inline-flex}.onboard-trust .dot{background:var(--gold);border-radius:50%;flex-shrink:0;width:5px;height:5px}.onboard-brand-mark{font-family:var(--sans);color:#ffffff06;letter-spacing:-.06em;pointer-events:none;-webkit-user-select:none;user-select:none;font-size:280px;font-weight:600;line-height:1;position:absolute;bottom:-40px;right:-20px}.onboard-form-panel{background:var(--ivory);justify-content:center;align-items:center;padding:48px 56px;display:flex}.onboard-form-inner{width:100%;max-width:420px}.stepper{align-items:center;gap:0;margin-bottom:36px;display:flex}.stepper-item{flex-direction:column;align-items:center;gap:6px;display:flex}.stepper-num{border:1.5px solid var(--line-2);width:28px;height:28px;font-family:var(--mono);color:var(--gray-3);background:var(--ivory);border-radius:50%;justify-content:center;align-items:center;font-size:11px;font-weight:500;transition:all .2s;display:flex}.stepper-label{font-size:10.5px;font-family:var(--mono);letter-spacing:.04em;text-transform:uppercase;color:var(--gray-3);font-weight:500}.stepper-line{background:var(--line);flex:1;height:1.5px;margin:0 8px 22px;transition:background .2s}.stepper-item.current .stepper-num{border-color:var(--gold);color:var(--gold);box-shadow:0 0 0 3px var(--gold-wash)}.stepper-item.current .stepper-label{color:var(--ink)}.stepper-item.done .stepper-num{background:var(--gold);border-color:var(--gold);color:#fff}.stepper-item.done .stepper-label{color:var(--gold-deep)}.stepper-line.done{background:var(--gold)}.onboard-step{font-family:var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--gray-3);margin-bottom:10px;font-size:10.5px;font-weight:500}.onboard-title{font-family:var(--sans);letter-spacing:-.025em;color:var(--ink);margin-bottom:8px;font-size:24px;font-weight:500}.onboard-desc{color:var(--gray-2);font-size:13.5px;line-height:1.55}.field{flex-direction:column;display:flex}.field-label{color:var(--ink);margin-bottom:6px;font-size:12px;font-weight:500}.field-hint{color:var(--gray-3);font-size:11px;font-family:var(--mono);margin-top:5px}.institution-btn{border:1px solid var(--line);border-radius:var(--r-lg);cursor:pointer;text-align:left;background:#fff;align-items:center;gap:14px;width:100%;padding:12px 16px;transition:all .12s;display:flex}.institution-btn:hover{border-color:var(--line-2);background:#fff}.institution-btn.selected{border-color:var(--gold);background:var(--gold-wash);box-shadow:0 0 0 3px var(--gold-wash)}.institution-btn .crest{background:var(--ink);color:#fff;width:36px;height:36px;font-family:var(--sans);border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;font-size:16px;font-weight:600;display:flex}.institution-btn .name{color:var(--ink);font-size:13.5px;font-weight:500}.institution-btn .sub{color:var(--gray-3);font-size:11px;font-family:var(--mono);margin-top:2px}.permissions-list{flex-direction:column;gap:12px;display:flex}.permission-item{align-items:flex-start;gap:12px;display:flex}.permission-check{background:var(--success-wash);width:22px;height:22px;color:var(--success);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;margin-top:2px;display:flex}.permission-text{color:var(--ink);font-size:13px;line-height:1.45}.permission-text strong{font-weight:500}.permission-text .muted{color:var(--gray-3);font-size:11.5px}.btn-gold{background:var(--gold);color:#fff;border-color:var(--gold)}.btn-gold:hover:not(:disabled){background:var(--gold-deep);border-color:var(--gold-deep)}.pill-gold{background:var(--gold-wash);color:var(--gold);border-color:#b4975b33}@media (max-width:768px){.sidebar-layout{grid-template-columns:1fr}.sidebar{display:none}.main{padding:20px 16px 60px}.grid-2,.grid-3,.grid-4,.onboard-shell{grid-template-columns:1fr}.onboard-brand{min-height:auto;padding:32px 24px}.onboard-hero-title{font-size:32px}.onboard-brand-mark{display:none}.onboard-form-panel{padding:32px 24px}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}