:root{color-scheme:light;--ink:#193453;--navy:#182f4c;--blue:#316ab2;--bright:#427fca;--bg:#f4f7fb;--border:#dfe7f0;--muted:#70849a;--radius:16px}*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased;background:var(--bg);color:#243a53}body{min-height:100vh}button,input,select,textarea{font:inherit}a{text-decoration:none;color:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #78aee9;outline-offset:3px}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;clip:rect(0,0,0,0);overflow:hidden;white-space:nowrap}.noscript{margin:0;padding:17px;background:#fae8b4;text-align:center;color:#563c17}.eyebrow{font-size:11px;letter-spacing:.14em;font-weight:850;color:var(--blue);text-transform:uppercase}.auth-gate{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:36px 20px;background:radial-gradient(circle at 50% 30%,#e3eefb,#f4f7fb 70%);gap:12px}.gate-symbol{padding:15px;background:#fff;border-radius:21px;box-shadow:0 15px 30px #1f447314}.gate-symbol img{display:block}.auth-gate h1{font-size:clamp(25px,3vw,38px);letter-spacing:-.05em;margin:8px 0 1px;max-width:580px;line-height:1.12}.auth-gate p{font-size:15px;color:var(--muted);max-width:515px;margin:0 0 12px;line-height:1.7}.solid-link{display:inline-flex;justify-content:center;align-items:center;gap:15px;border:0;background:var(--blue);color:#fff;padding:13px 20px;border-radius:12px;font-size:14px;font-weight:760}.solid-link:hover{background:#225b9f}.subtle-link{color:var(--blue);font-weight:700;font-size:13px;padding:8px}
.workspace{display:grid;grid-template-columns:270px minmax(0,1fr);min-height:100vh;min-height:100dvh}
.chat-sidebar{display:flex;flex-direction:column;min-width:0;padding:24px 15px 17px;background:var(--navy);color:#ecf4fb;min-height:100vh;min-height:100dvh}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:32px;padding:0 10px}.brand{display:flex;align-items:center;gap:11px;color:#fff;font-size:14px;font-weight:520;line-height:1.2;letter-spacing:-.02em}.brand img{border-radius:11px}.brand strong{display:block;font-size:15px}.icon-button{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;border:1px solid transparent;background:none;color:#6d849c;font-size:20px}.icon-button:hover{background:#eaf1f9;color:var(--blue)}.close-sidebar{display:none;color:#dce9f7}.close-sidebar:hover{background:#304f70;color:#fff}
.sidebar-actions{display:grid;gap:9px}.new-chat{height:45px;border:0;border-radius:11px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:flex-start;gap:10px;padding:0 15px;font-weight:730;font-size:13px}.new-chat:hover{background:#457fc6}.new-chat-icon{font-size:22px;line-height:1}.sidebar-search{height:41px;background:transparent;color:#bccfe3;border:1px solid #47617c4a;border-radius:10px;display:flex;gap:11px;align-items:center;text-align:left;padding:0 14px;font-size:12px}.sidebar-search:hover{background:#294568}.sidebar-search>span:first-child{font-size:19px}.soon{margin-left:auto;font-size:10px;color:#9eb6cd}
.history-section{flex:1;min-height:0;display:flex;flex-direction:column;margin-top:35px}.sidebar-section-title{font-size:10px;font-weight:840;letter-spacing:.14em;color:#91abc4;padding:0 12px;margin-bottom:18px}.history-empty{text-align:center;padding:18px 14px 20px;border:1px dashed #44617c;border-radius:14px;background:#243e5c4d}.history-mark{display:block;font-size:28px;color:#99b7d8;margin-bottom:12px}.history-empty strong{display:block;font-size:12px;font-weight:780;color:#e6f0fb}.history-empty p{font-size:11px;line-height:1.7;color:#b3c7de;margin:8px 0 0}
.sidebar-bottom{display:grid;gap:16px;margin-top:24px}.availability-mini{display:flex;align-items:center;gap:8px;padding:0 7px;color:#bfd0e1;font-size:11px}.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#80b0e7;box-shadow:0 0 0 4px #80b0e719}.home-shortcut{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;border-radius:10px;color:#d8e7f6;font-size:12px}.home-shortcut:hover{background:#294667}.student-summary{display:flex;align-items:center;gap:11px;padding:15px 6px 1px;border-top:1px solid #47617c}.avatar{width:36px;height:36px;display:grid;place-items:center;flex:none;border-radius:50%;background:#8ebaf1;color:#16395c;font-size:13px;font-weight:870}.student-text{display:grid;gap:2px;min-width:0}.student-text strong{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.student-text small{font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:#a9bfd3}
.chat-main{display:flex;flex-direction:column;min-width:0;min-height:100vh;min-height:100dvh;background:radial-gradient(ellipse at 58% 23%,#fafdff,#f1f5fb 80%)}.topbar{height:80px;flex:none;display:flex;align-items:center;justify-content:space-between;gap:15px;padding:0 clamp(23px,3.4vw,50px);border-bottom:1px solid #e5ebf3;background:#ffffffd9;backdrop-filter:blur(18px)}.topbar-left,.topbar-right{display:flex;align-items:center;gap:14px}.chat-title{display:grid;gap:2px}.chat-title strong{color:var(--ink);font-size:15px;letter-spacing:-.02em}.chat-title span{color:var(--muted);font-size:11px}.env-pill{display:inline-flex;align-items:center;gap:8px;border-radius:30px;background:#edf4fc;border:1px solid #d7e4f3;color:#4a6990;font-size:11px;padding:7px 11px;font-weight:700}.home-link{color:var(--blue);font-size:12px;font-weight:800;padding:9px}.home-link:hover{text-decoration:underline}.menu-toggle{display:none}
.model-toolbar{flex:none;display:flex;align-items:center;gap:14px;min-height:88px;padding:13px clamp(23px,3.4vw,50px);border-bottom:1px solid #e5ebf3;background:#fff}.model-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:13px;background:#e9f2fd;color:#3575be;font-size:25px}.model-copy{display:grid;gap:5px;margin-right:auto}.model-copy label{font-size:12px;font-weight:850;color:#263b55}.model-copy span{font-size:11px;color:var(--muted)}.selector-wrap{position:relative}.selector-wrap:after{content:"⌄";position:absolute;right:12px;top:50%;transform:translateY(-60%);pointer-events:none;color:#567597}.selector-wrap select{appearance:none;min-width:210px;max-width:240px;height:42px;padding:0 32px 0 14px;border:1px solid #d4e2f2;background:#f8fbff;border-radius:10px;color:#28486b;font-size:12px;font-weight:760;cursor:pointer}.provider-badge{display:inline-flex;align-items:center;justify-content:center;border:1px solid #e4d9b5;background:#fffaec;border-radius:30px;color:#987124;font-size:10px;font-weight:780;min-height:28px;padding:4px 10px;white-space:nowrap}.provider-badge.paid{background:#f3eaf8;color:#8257a4;border-color:#e6d8ee}.provider-badge.not-configured{background:#f0f3f7;color:#6d8198;border-color:#dce4ee}
.conversation-scroll{flex:1;display:flex;overflow-y:auto;min-height:210px}.chat-welcome{width:min(900px,calc(100% - 64px));margin:auto;display:flex;flex-direction:column;align-items:center;text-align:center;padding:42px 0 33px}.ai-emblem{display:grid;place-items:center;width:66px;height:66px;border-radius:23px;font-size:34px;color:#f4faff;background:linear-gradient(145deg,#4d8fd9,#234f8d);box-shadow:0 12px 32px #316ab234;margin-bottom:23px}.welcome-eyebrow{color:#567da8;font-size:10px;font-weight:850;letter-spacing:.17em;margin:0 0 12px}.chat-welcome h1{margin:0;color:#203957;line-height:1.07;letter-spacing:-.055em;font-size:clamp(33px,3.7vw,52px);font-weight:790}.welcome-subtitle{max-width:540px;font-size:14px;color:var(--muted);line-height:1.72;margin:15px 0 31px}.starter-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px;width:100%;text-align:left}.starter-card{position:relative;display:flex;flex-direction:column;align-items:flex-start;min-height:172px;border:1px solid #dfe8f2;border-radius:16px;background:#fff;text-align:left;padding:17px;transition:box-shadow 160ms,border-color 160ms,transform 160ms}.starter-card:hover{border-color:#a4c8ec;box-shadow:0 15px 24px #1d477e14;transform:translateY(-2px)}.starter-card strong{font-size:12px;color:#2a3d58;margin:16px 0 4px}.starter-card>span:not(.starter-icon):not(.starter-arrow){font-size:11px;line-height:1.6;color:#8496a7}.starter-icon{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;font-size:18px}.starter-icon.blue{background:#e6f0fc;color:#3d74b9}.starter-icon.purple{background:#f1ecfb;color:#8169b9}.starter-icon.teal{background:#e5f7f3;color:#359787}.starter-icon.orange{background:#fcf0e6;color:#c58b4a}.starter-arrow{position:absolute;top:17px;right:17px;color:#99afc5;font-size:17px}.planned-note{display:flex;align-items:flex-start;gap:9px;background:#eff5fc;border:1px solid #dce8f5;border-radius:12px;color:#587291;text-align:left;padding:12px 15px;font-size:11px;margin-top:20px;width:100%;line-height:1.6}.planned-note>span:first-child{font-size:18px;color:#3b78bd}
.composer-region{flex:none;padding:0 clamp(18px,3.4vw,50px) 22px;background:linear-gradient(180deg,transparent,#f2f6fb 45%)}.composer-wrap{max-width:890px;margin:auto}.composer-box{border:1px solid #bfd5ee;border-radius:18px;background:#fff;padding:15px 17px 12px;box-shadow:0 12px 40px #345d9314}.composer-box:focus-within{border-color:#77a7db;box-shadow:0 0 0 4px #316ab210,0 12px 40px #345d9314}#promptInput{display:block;border:0;outline:none;resize:none;background:transparent;width:100%;height:75px;max-height:190px;font-size:14px;line-height:1.65;color:#2b4562;padding:0}#promptInput::placeholder{color:#91a5b8}.composer-actions{display:flex;align-items:center;justify-content:space-between}.composer-helpers{display:flex;align-items:center;gap:18px}.input-hint{font-size:11px;color:#7d93a9}.char-counter{font-variant-numeric:tabular-nums;font-size:11px;color:#98a9ba}.send-button{border:0;width:37px;height:37px;display:grid;place-items:center;background:#d9e6f5;color:#7898b9;border-radius:11px;font-size:21px;cursor:not-allowed}.composer-hint{text-align:center;color:#6d87a3;font-size:11px;margin:10px 0 5px}.medical-note{text-align:center;color:#93a6b9;font-size:10px;line-height:1.5;margin:0}
.toast{position:fixed;right:21px;bottom:26px;z-index:40;background:#193453;color:#fff;border-radius:13px;padding:13px 17px;max-width:min(370px,calc(100% - 35px));box-shadow:0 18px 38px #172d4b44;font-size:12px;line-height:1.5}
@media(max-width:1200px){.starter-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.starter-card{min-height:137px}.chat-welcome{padding:30px 0 24px}.topbar{height:72px}.model-toolbar{min-height:75px}.model-copy span{max-width:280px}}
@media(max-width:850px){.workspace{display:block}.chat-sidebar{position:fixed;top:0;bottom:0;left:0;z-index:70;width:min(310px,86vw);height:100dvh;transform:translateX(-100%);transition:transform 220ms;box-shadow:none}.chat-sidebar.is-open{transform:translateX(0);box-shadow:20px 0 50px #10294363}.sidebar-backdrop:not([hidden]){display:block;position:fixed;inset:0;z-index:60;border:0;background:#09203a8a}.close-sidebar{display:grid}.menu-toggle{display:grid}.chat-main{min-height:100vh;min-height:100dvh}.conversation-scroll{min-height:250px}}
@media(max-width:600px){.topbar{padding:0 15px;height:65px}.topbar-left,.topbar-right{gap:8px}.chat-title strong{font-size:13px}.chat-title span{font-size:10px}.env-pill{display:none}.home-link{font-size:11px}.model-toolbar{display:grid;grid-template-columns:40px minmax(0,1fr);gap:8px 12px;padding:15px 19px}.model-icon{grid-row:1;width:40px;height:40px}.model-copy{grid-row:1}.model-copy span{font-size:10px}.selector-wrap{grid-column:1/-1}.selector-wrap select{max-width:none;width:100%;height:41px}.provider-badge{grid-column:1/-1;justify-self:start}.chat-welcome{width:calc(100% - 38px);padding:38px 0 25px}.ai-emblem{width:57px;height:57px;border-radius:19px;font-size:29px;margin-bottom:18px}.chat-welcome h1{font-size:34px}.welcome-subtitle{font-size:13px;margin-bottom:26px}.starter-grid{gap:10px}.starter-card{padding:13px;min-height:146px}.starter-card strong{font-size:11px;margin-top:14px}.starter-card>span:not(.starter-icon):not(.starter-arrow){font-size:10px}.starter-icon{width:31px;height:31px}.composer-region{padding:0 12px 14px}.composer-box{padding:12px 13px 9px}.composer-hint{font-size:10px}.medical-note{font-size:9px}}
@media(max-width:365px){.starter-grid{grid-template-columns:1fr}.starter-card{min-height:104px}.chat-title span{display:none}.composer-helpers{gap:7px}.planned-note{font-size:10px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}/* AI-2: real user-owned conversations in the sidebar. */
.history-list{display:flex;flex-direction:column;gap:5px;overflow-y:auto;max-height:45vh}
.history-entry{display:flex;align-items:center;gap:3px;border-radius:10px;padding:3px 5px;color:#c8daee}
.history-entry:hover,.history-entry.current{background:#2a4b6e}
.history-open{min-width:0;flex:1;border:0;background:transparent;text-align:left;color:inherit;padding:8px 7px;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.history-action{flex:none;border:0;background:transparent;color:#aac2db;font-size:15px;padding:6px;border-radius:7px}
.history-action:hover{background:#52769c;color:white}
.history-search-field{background:#203e5e;border:1px solid #54779d;border-radius:9px;padding:10px;color:white;width:100%;font-size:12px}
.history-search-field::placeholder{color:#c0cfdd}