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16px;display:flex}.quiz-prompt{color:var(--text-primary);font-size:1.02rem;line-height:1.55}.quiz-options{flex-direction:column;gap:8px;display:flex}.quiz-option{border:1px solid var(--border);background:var(--surface);width:100%;color:var(--text-primary);text-align:left;border-radius:14px;align-items:flex-start;gap:10px;padding:12px;transition:border-color .15s,background .15s,box-shadow .15s;display:flex}.quiz-option:hover:not(:disabled){border-color:var(--blue);background:var(--hover-fill)}.quiz-option.is-selected{background:var(--active-fill);box-shadow:0 0 0 3px var(--border);border-color:#60a5fa}.quiz-option.is-correct{border-color:var(--success-border);background:var(--success-bg)}.quiz-option.is-incorrect{border-color:var(--error-border);background:var(--error-bg)}.quiz-option:disabled{cursor:default}.quiz-option-marker{background:var(--surface);border:1.5px solid #94a3b8;border-radius:999px;flex:none;width:16px;height:16px;margin-top:2px}.quiz-option.is-selected .quiz-option-marker{border-color:var(--blue);box-shadow:inset 0 0 0 4px var(--blue)}.quiz-option.is-correct .quiz-option-marker{border-color:#16a34a;box-shadow:inset 0 0 0 4px #16a34a}.quiz-option.is-incorrect .quiz-option-marker{border-color:#dc2626;box-shadow:inset 0 0 0 4px #dc2626}.quiz-option-text{flex:1;font-size:.92rem;line-height:1.45}.quiz-option-text .chat-markdown>:first-child{margin-top:0}.quiz-option-text .chat-markdown>:last-child{margin-bottom:0}.quiz-option-text .chat-markdown p{margin:0}.quiz-explanation{background:var(--surface-elevated);color:var(--text-secondary);border-radius:12px;margin:0;padding:10px 12px;font-size:.86rem;line-height:1.5}@media (max-width:560px){.landing{padding-inline:18px}.wordmark{gap:10px}.model-picker-control,.model-picker select{max-width:132px}.wordmark-mark{border-radius:11px;width:36px;height:36px}.tagline{max-width:320px;margin-top:15px;margin-bottom:26px}.composer{border-radius:19px;min-height:145px;padding:15px 15px 8px}.recent-chats-grid{grid-template-columns:1fr}.recent-chats-carousel{gap:6px}.recent-chats-carousel-nav{flex-basis:30px;width:30px;height:30px}.composer-chat{border-radius:22px;min-height:0;padding:12px 12px 10px}.prompt-hint{display:none}.chat-shell{--chat-chrome-gutter:48px}.chat-chrome{padding:12px 0 10px}.pane-rail-left.is-open{flex:0 0 min(78vw + 40px,340px);width:min(78vw + 40px,340px)}.pane-rail-right.is-open{flex:42%;width:100%}.chat-panel.has-topic-coach{flex-direction:column}.pane-rail-chat.is-open{flex:0 0 min(42vh,320px);width:100%}.chat-panel.is-chat-open .pane-rail-chat.is-open{flex:55%}.pane-rail-chat.is-collapsed{border:0;flex:0 0 0;width:0;min-height:0}.pane-rail-topic.is-open{flex:auto;width:100%;min-height:220px}.pane-rail-topic.is-hidden{display:none}.topic-coach-centre{flex:auto;min-height:0}.composer-tool-button span{display:none}.chat-panel,.chat-panel-split{flex-direction:column}.chat-panel-split.is-split-open .chat-main-pane{border-right:0;border-bottom:1px solid var(--border-subtle);flex:58%}.pane-rail-right{border-top:0;border-left:0;flex-basis:0;width:100%;padding:0 10px 10px}.pane-rail-right.is-collapsed{flex:0 0 44px;width:100%;min-height:44px;padding:8px 10px}.pane-rail-right .pane-notch-strip{flex-direction:row;flex:none;align-self:center;width:auto;max-width:100%;margin:0;padding:0}.pane-notch-right{border:1px solid var(--border);flex-direction:row;gap:6px;width:auto;padding:8px 14px}@supports (color:color-mix(in lab, red, red)){.pane-notch-right{border:1px solid color-mix(in srgb, var(--border) 70%, transparent)}}.pane-notch-right{border-radius:999px}.pane-notch-right .pane-notch-label{writing-mode:horizontal-tb;transform:none}.chat-transcript-inner,.chat-composer-wrap,.flashcards-panel{padding-inline:14px}.flashcards-header{flex-direction:column}.flashcard,.flashcard-face{min-height:180px}.chat-disclaimer{padding-inline:14px}}@media (prefers-reduced-motion:reduce){.chat-main-pane,.pane-rail,.pane-rail-body,.flashcard,.flashcards-mode-thumb,.composer{transition:none}.composer:focus-within{transform:none}.landing-user-menu .user-menu,.chat-chrome-logo,.chat-chrome-user .user-menu{transition:none}.chat-chrome-logo:hover,.chat-chrome-logo:focus-visible,.chat-chrome-user .user-menu:hover,.chat-chrome-user .user-menu.is-open,.pane-notch:hover,.study-tools-action:hover:not(:disabled){transform:none}.flashcard-enter-next,.flashcard-enter-prev{animation:none}}.faq-list{flex-direction:column;gap:10px;margin-top:22px;display:flex}.faq-item{border:1px solid var(--border-subtle);background:var(--surface-elevated);border-radius:14px;overflow:hidden}.faq-question{cursor:pointer;color:var(--text-primary);padding:14px 44px 14px 16px;font-size:.95rem;font-weight:600;line-height:1.45;list-style:none;position:relative}.faq-question::-webkit-details-marker{display:none}.faq-question:after{content:"";border-right:1.5px solid var(--text-muted);border-bottom:1.5px solid var(--text-muted);width:8px;height:8px;transition:transform .16s;position:absolute;top:50%;right:16px;transform:translateY(-65%)rotate(45deg)}.faq-item[open] .faq-question:after{transform:translateY(-20%)rotate(225deg)}.faq-answer{color:var(--text-secondary);margin:0;padding:0 16px 16px;font-size:.95rem;line-height:1.65}.about-section-body p{margin:0}.about-section-body ul{margin:0;padding-left:1.15rem}.about-section-body li+li{margin-top:8px}.about-section-body strong{color:var(--text-primary);font-weight:600}@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}