@font-face{font-family:"SF Pro Rounded Local";src:url("./assets/fonts/SF-Pro-Rounded-Semibold.otf") format("opentype");font-weight:600;font-style:normal;font-display:swap}
:root{--bg:#141313;--panel:#1d1d1d;--field:#3c3c3c;--line:#383838;--field-line:#636363;--white:#fff;--muted:#798686;--error:#ac5b5b}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--bg)}
body{color:var(--white);font-family:"SF Pro Rounded Local",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
.portal-shell{width:min(836px,calc(125% - 34px));margin:0 auto;padding-top:52px;transform:scale(.8);transform-origin:top center}
.portal-hero{display:block;width:423px;height:257px;object-fit:cover;margin:0 auto}
.login-form{width:368px;margin:62px auto 0;display:grid;grid-template-columns:262px 84px;gap:22px}
.login-form input,.login-form button{height:66px;border-radius:18px;font:600 20px "SF Pro Rounded Local",system-ui,sans-serif}
.login-form input{width:262px;padding:0 24px;border:1px solid var(--field-line);outline:0;background:var(--field);color:#fff}
input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}
.question-composer textarea::placeholder{color:#6B7575;font-size:18px;opacity:.5}
input:focus::placeholder,textarea:focus::placeholder{color:transparent;opacity:0}
.login-form input.invalid{border-color:var(--error)}
.login-form button{width:84px;padding:0;border:1px solid #373737;background:#fff;display:grid;place-items:center;cursor:pointer}
.login-form button img{width:32px;height:32px}
.login-form button:active,.post-button:active{transform:scale(.96)}
input:focus-visible,textarea:focus-visible,button:focus-visible,.upload-button:focus-within{outline:2px solid #7c7c7c;outline-offset:2px}
.login-form input:focus-visible,.question-composer textarea:focus-visible{outline:0}
.login-error{grid-column:1/-1;margin:2px 0 0;color:var(--error);font-size:18px;line-height:25px}
.student-profile{display:flex;align-items:center;gap:24px;margin:35px 0 52px;padding-left:28px;color:var(--muted);font-size:18px;line-height:25px;font-variant-numeric:tabular-nums}
.student-profile span{white-space:nowrap}
.student-profile .student-name{font-size:19px}
.logout-button{padding:0;border:0;background:transparent;color:var(--error);font:600 18px "SF Pro Rounded Local",system-ui,sans-serif;cursor:pointer}
.logout-button:hover{color:#cc7474}
.question-composer{position:relative;min-height:249px;border:1px solid var(--line);border-radius:30px;background:var(--panel);padding:28px;display:flex;flex-direction:column}
.question-composer textarea{width:100%;min-height:130px;resize:none;padding:0;border:0;outline:0;background:transparent;color:#fff;font:600 16px/30px "SF Pro Rounded Local",system-ui,sans-serif}
.question-composer.invalid{border-color:var(--error)}
.composer-actions{display:flex;align-items:center;justify-content:space-between;margin-top:auto}
.upload-button{width:50px;height:50px;border:1px solid var(--field-line);border-radius:18px;background:var(--field);display:grid;place-items:center;overflow:hidden;cursor:pointer}
.upload-button.has-preview{border-color:transparent;background:transparent}
.upload-button>img:first-child{width:24px;height:24px}
.image-preview{width:50px;height:50px;object-fit:cover}
.post-button{width:66px;height:50px;padding:0;border:1px solid #373737;border-radius:18px;background:#fff;display:grid;place-items:center;cursor:pointer}
.post-button img{width:36px;height:36px;transition:opacity 150ms ease}
.composer-error{margin:10px 0 0;color:var(--error);font-size:16px;line-height:22px}
.student-question-list{display:grid;gap:28px;margin-top:28px;padding-bottom:60px}
.history-card{min-height:206px;border:1px solid var(--line);border-radius:30px;background:var(--panel);padding:28px;display:flex;flex-direction:column}
.history-content{margin:0;color:#798686;font-size:16px;line-height:30px;white-space:pre-wrap;overflow-wrap:anywhere}
.history-footer{display:flex;align-items:flex-end;margin-top:auto;padding-top:20px}
.history-card.image-only{min-height:0}
.history-card.image-only .history-content{display:none}
.history-card.image-only .history-footer{margin-top:0;padding-top:0}
.history-image{width:50px;height:50px;border:0;border-radius:18px;object-fit:cover}
.history-meta{display:flex;gap:12px;margin-left:auto;color:var(--muted);font-size:15px;line-height:25px;font-variant-numeric:tabular-nums}
.history-delete{padding:0;border:0;background:transparent;color:var(--error);font:600 15px/25px "SF Pro Rounded Local",system-ui,sans-serif;cursor:pointer}
.history-delete:hover{color:#cc7474}
.history-delete:active{transform:scale(.96)}
.delete-dialog{width:min(410px,calc(100% - 32px));padding:0;border:1px solid #454545;border-radius:18px;background:var(--panel);color:var(--white);box-shadow:0 24px 80px rgba(0,0,0,.55);font-family:"SF Pro Rounded Local",system-ui,sans-serif}
.delete-dialog::backdrop{background:rgba(10,10,10,.76);backdrop-filter:blur(6px)}
.delete-dialog-content{padding:30px}
.delete-dialog h2{margin:0;font-size:22px;font-weight:600;letter-spacing:-.01em}
.delete-dialog p{margin:12px 0 28px;color:var(--muted);font-size:16px;line-height:1.45}
.delete-dialog-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.delete-dialog-actions button{height:50px;border:1px solid #555;border-radius:16px;font:600 16px "SF Pro Rounded Local",system-ui,sans-serif;cursor:pointer}
.dialog-cancel{background:#303030;color:#fff}
.dialog-confirm{border-color:#fff!important;background:#fff;color:var(--bg)}
.delete-dialog-actions button:hover{filter:brightness(1.08)}
.delete-dialog-actions button:active{transform:scale(.98)}
@media(max-width:760px){.portal-shell{width:calc(125% - 28px);padding-top:44px}.portal-hero{width:100%;height:auto}.login-form{width:100%;grid-template-columns:1fr 84px}.login-form input{width:100%}.student-profile{padding-left:0;gap:12px;flex-wrap:wrap}.question-composer{padding:22px;border-radius:24px}.question-composer textarea{font-size:16px;line-height:30px}.history-card{padding:22px;border-radius:24px}}

/* AI for UI: surfaces + animations. Resting dimensions remain unchanged. */
:root{--ui-ease:cubic-bezier(.215,.61,.355,1);--surface-ring:inset 0 0 0 1px rgb(255 255 255/.12);--dialog-ring:0 0 0 1px rgb(255 255 255/.14)}
.question-composer,.history-card{border-color:transparent;box-shadow:var(--surface-ring)}
.question-composer.invalid{border-color:var(--error);box-shadow:none}
.login-form button,.post-button{border-color:transparent;box-shadow:inset 0 0 0 1px rgb(0 0 0/.14)}
.login-form button,.post-button,.upload-button,.logout-button,.history-delete,.delete-dialog-actions button{transition:transform 150ms var(--ui-ease),background-color 150ms ease,color 150ms ease,filter 150ms ease}
.login-form button:active,.post-button:active,.upload-button:active,.history-delete:active{transform:scale(.96)}
.delete-dialog{opacity:0;transform:scale(.97);box-shadow:var(--dialog-ring);transition:opacity 200ms var(--ui-ease),transform 200ms var(--ui-ease),display 200ms allow-discrete,overlay 200ms allow-discrete}
.delete-dialog[open]{opacity:1;transform:scale(1)}
.delete-dialog::backdrop{opacity:0;transition:opacity 200ms var(--ui-ease),display 200ms allow-discrete,overlay 200ms allow-discrete}
.delete-dialog[open]::backdrop{opacity:1}
@starting-style{.delete-dialog[open]{opacity:0;transform:scale(.97)}.delete-dialog[open]::backdrop{opacity:0}}
@media(hover:hover) and (pointer:fine){.logout-button:hover,.history-delete:hover{color:#cc7474}.upload-button:hover{background:#444}.post-button:hover img{opacity:.62}.delete-dialog-actions button:hover{filter:brightness(1.08)}}
@media(hover:none),(pointer:coarse){.logout-button:hover,.history-delete:hover{color:var(--error)}.upload-button:hover{background:var(--field)}.upload-button.has-preview:hover{background:transparent}.delete-dialog-actions button:hover{filter:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}