.auth-container { width: min(calc(100% - 2 * var(--gutter)), 480px); margin: 40px auto var(--section-space); }
.auth-form, .login-box { padding: clamp(22px, 4vw, 36px); background: var(--card-background); border: 1px solid var(--border-color); border-radius: var(--radius); box-shadow: var(--shadow-light); }
.auth-form > p { color: var(--muted); font-size: 15px; overflow-wrap: anywhere; }
.auth-form .btn-submit { width: 100%; }
.auth-form #otp { font-size: 24px; text-align: center; letter-spacing: .3em; }
.registration-form { max-width: 780px; margin: 0 auto; padding: clamp(22px, 4vw, 40px); border: 1px solid var(--border-color); border-radius: var(--radius); background: var(--card-background); }
.registration-form textarea { min-height: 120px; }
.registration-form .btn-submit { width: 100%; }
.registration-intro { max-width: 780px; margin: 0 auto 28px; color: var(--muted); }
.profile-details { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; margin: 28px 0; }
.profile-details dt { color: var(--muted); font-size: 13px; }
.profile-details dd { margin: 6px 0 0; font-weight: 500; overflow-wrap: anywhere; }
.profile-action-buttons { margin-top: 0; }
@media (max-width: 600px) { .profile-details { grid-template-columns: 1fr; } }
.password-settings { max-width: 480px; margin: 0 0 56px; }
.password-settings summary { min-height: 48px; cursor: pointer; color: var(--accent-color); padding-block: 12px; font-weight: 600; }
.password-settings .auth-form { margin-top: 12px; }

/* Minhas AI: a compact study workspace, sized to the visual viewport. */
.chat-page-body { height: var(--chat-height, 100dvh); min-height: 0; overflow: hidden; }
.chat-page-body .site-header { flex-shrink: 0; }
.chat-workspace { width: 100%; display: flex; flex-direction: column; flex: 1; min-height: 0; background: var(--card-background); }
.chat-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 16px; flex-shrink: 0; border-bottom: 1px solid var(--border-color); }
.chat-identity { display: flex; align-items: center; gap: 12px; min-width: 0; }
.chat-identity img { width: 40px; height: 44px; border-radius: 10px; object-fit: cover; flex-shrink: 0; }
.chat-header h1 { font-size: 21px; letter-spacing: -.035em; margin: 0; }
.chat-container { display: flex; flex-direction: column; position: relative; flex: 1; min-height: 0; overflow: hidden; }
.chat-messages { overflow-y: auto; overflow-x: hidden; overscroll-behavior: contain; flex: 1; min-height: 0; padding: 24px 16px; display: flex; flex-direction: column; gap: 20px; scroll-padding-block: 20px; }
.chat-welcome { width: 100%; max-width: 620px; margin: auto; padding-block: 8px; }
.chat-welcome h2 { font-size: 26px; line-height: 1.3; letter-spacing: -.025em; margin: 0; text-align: center; }
.sample-questions-wrapper { margin-top: 18px; }
#refresh-questions-btn { display: grid; place-items: center; width: 44px; height: 44px; flex-shrink: 0; padding: 0; background: var(--surface-soft); border: 1px solid var(--border-color); border-radius: 8px; color: var(--accent-color); transition: background .18s ease, border-color .18s ease; }
#refresh-questions-btn:is(:hover, :focus-visible) { background: var(--accent-tint); border-color: var(--accent-color); }
.chat-message { display: flex; flex-direction: column; align-items: flex-start; width: 100%; max-width: 72ch; min-width: 0; }
.message-author { font-size: 11px; color: var(--muted); margin: 0 0 8px; }
.chat-message .message-content { min-width: 0; max-width: 100%; width: 100%; font-size: 15px; line-height: 1.85; overflow-wrap: anywhere; }
.chat-message.user { align-self: flex-end; width: auto; max-width: 90%; }
.chat-message.user .message-author { align-self: flex-end; }
.chat-message.user .message-content { padding: 12px 16px; border: 1px solid var(--border-color); border-radius: 14px 14px 4px 14px; background: var(--surface-soft); color: var(--text-color); }
.chat-message.error { padding: 14px 16px; background: var(--error-bg-light); color: var(--error-text-light); border-radius: 12px; }
.chat-message.error .message-author { color: inherit; }
.chat-message .message-content :is(h1,h2,h3,h4) { font-family: var(--font-body); font-size: 19px; line-height: 1.5; letter-spacing: 0; margin: 22px 0 10px; }
.chat-message .message-content > :first-child { margin-top: 0; }
.chat-message .message-content p { margin-bottom: 14px; }
.chat-message .message-content > :last-child { margin-bottom: 0; }
.chat-message .message-content ul, .chat-message .message-content ol { padding-left: 22px; }
.chat-message .message-content li { padding-left: 4px; margin-bottom: 6px; }
.chat-message pre { max-width: 100%; overflow: auto; background: var(--background-color); color: var(--text-color); padding: 16px; border: 1px solid var(--border-color); border-radius: 10px; font: 400 12px/1.8 var(--font-mono); }
.chat-message code { font-family: var(--font-mono); font-size: .86em; }
.chat-message pre code { font-size: inherit; overflow-wrap: normal; }
.chat-message table { max-width: 100%; display: block; overflow-x: auto; border-collapse: collapse; font-size: 13px; }
.chat-message td, .chat-message th { padding: 10px 12px; border: 1px solid var(--border-color); text-align: left; }
.chat-message th { background: var(--surface-soft); }
.chat-message mjx-container[display='true'] { max-width: 100%; overflow-x: auto; overflow-y: hidden; padding-block: 6px; }
.message-actions { display: flex; padding-top: 8px; }
.message-actions button, .chat-retry { min-height: 44px; padding: 8px 0; border: 0; background: transparent; color: var(--accent-color); font-size: 11px; }
.chat-thinking { display: flex; gap: 12px; align-items: center; color: var(--muted); font-size: 12px; padding-block: 8px; }
.typing-indicator { display: flex; align-items: center; gap: 4px; }
.typing-indicator span { width: 5px; height: 5px; border-radius: 50%; background: var(--accent-color); animation: typing-pulse 1s infinite alternate; }
.typing-indicator span:nth-child(2) { animation-delay: .15s; }
.typing-indicator span:nth-child(3) { animation-delay: .3s; }
@keyframes typing-pulse { to { opacity: .35; transform: translateY(-3px); } }
.chat-jump { position: absolute; bottom: 12px; left: 50%; transform: translateX(-50%); display: flex; gap: 12px; align-items: center; min-height: 44px; padding: 10px 16px; border-radius: 100px; border: 1px solid var(--control-border); background: var(--card-background); color: var(--text-color); font-size: 12px; box-shadow: 0 3px 12px rgb(8 19 34 / 8%); }
.chat-input-container { flex-shrink: 0; border-top: 1px solid var(--border-color); background: var(--card-background); padding: 8px 16px max(12px, env(safe-area-inset-bottom)); }
.chat-input-form { margin: 0; }
.chat-input-wrapper { display: flex; align-items: flex-end; gap: 8px; border: 1px solid var(--control-border); border-radius: 14px; padding: 6px; background: var(--background-color); }
.chat-input-wrapper:focus-within { outline: none; }
.chat-input-wrapper textarea { border: 0; padding: 10px; font-size: 16px; background: transparent; min-height: 44px; max-height: 132px; flex: 1; resize: none; border-radius: 0; }
.chat-input-wrapper textarea:focus { outline: none; }
.chat-input-wrapper button { display: grid; place-items: center; width: 44px; height: 44px; padding: 0; flex-shrink: 0; border: 0; border-radius: 10px; background: var(--accent-color); color: var(--light-text-color); }
.chat-disclaimer { font-size: 10px; text-align: center; color: var(--muted); line-height: 1.6; margin: 10px 0 0; }
.chat-disclaimer a { text-decoration: none; }
@media (min-width: 701px) {
    .chat-workspace { width: min(calc(100% - 2 * var(--gutter)), 1000px); margin: 0 auto; overflow: hidden; background: var(--background-color); }
    .chat-header { padding: 18px 28px; }
    .chat-header h1 { font-size: 24px; }
    .chat-messages { padding: 32px; }
    .chat-welcome { padding-block: 16px; }

    .chat-message .message-content { font-size: 16px; }
    .chat-input-container { padding: 12px 28px 18px; background: var(--background-color); border-top: 0; }
}
@media (max-width: 359px) {
    .chat-messages { padding-inline: 16px; }
}
@media (max-height: 600px) {
    .chat-header { padding-block: 8px; }
    .chat-disclaimer { display: none; }
    .chat-workspace { margin-block: 0; border-radius: 0; }
    .chat-input-container { padding-block: 4px 8px; }
    .chat-welcome { padding-block: 0; }
}
@media (prefers-reduced-motion: reduce) {
    .typing-indicator span { animation: none; }
}

.chat-input-wrapper { transition: border-color 180ms ease-out, background 180ms ease-out; }
.chat-input-wrapper button { background: var(--surface-soft); color: var(--text-color); transition: background 180ms ease-out, color 180ms ease-out, transform 180ms var(--ease); }
.has-draft .chat-input-wrapper button, .chat-input-form[aria-busy='true'] .chat-input-wrapper button { background: var(--accent-color); color: var(--light-text-color); }
.chat-input-wrapper button:active:not(:disabled) { transform: scale(.94); }
.send-spinner { display: none; width: 18px; height: 18px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: send-working 800ms linear infinite; }
.chat-input-form[aria-busy='true'] #send-button svg { display: none; }
.chat-input-form[aria-busy='true'] .send-spinner { display: block; }
@keyframes send-working { to { transform: rotate(360deg); } }
.message-actions .is-copied { color: var(--success-text-light); }
@media (hover: hover) and (pointer: fine) {
    .has-draft #send-button:hover:not(:disabled) svg { transform: translateY(-2px); }
    #send-button svg { transition: transform 180ms var(--ease); }
}
@media (prefers-reduced-motion: reduce) {
    .send-spinner { animation: none; }
    .chat-input-wrapper button:active:not(:disabled), .has-draft #send-button:hover:not(:disabled) svg { transform: none; }
}

.account-page .page-header .container { width: min(calc(100% - 2 * var(--gutter)), 480px); }
.account-page .auth-container { margin-top: 24px; }
.account-page .auth-form { padding: 0; background: transparent; border: 0; border-radius: 0; }
.account-page .form-group { margin-bottom: 18px; }
.account-page .form-link { min-height: 44px; display: flex; align-items: center; justify-content: center; margin-top: 8px; }
.account-page .form-status:not(:empty) { display: block; }
.profile-page #change-password { scroll-margin-top: 100px; }
.registration-page .registration-form { padding: 20px 16px; border-radius: 6px; }
.registration-page .registration-intro { font-size: 13px; line-height: 1.75; margin-bottom: 20px; }
.registration-page legend { font-size: 20px; padding-bottom: 16px; }
.registration-page fieldset { margin-bottom: 20px; }
@media (min-width: 701px) { .registration-page .registration-form { padding: 28px; } }

/* Both signup flows share the site's open layout and compact controls. */
.enrollment-page .page-header .container,
.enrollment-container { width: min(calc(100% - 2 * var(--gutter)), 680px); margin-inline: auto; }
.enrollment-container { margin-block: 28px var(--section-space); }
.enrollment-page .registration-intro { font-size: 14px; line-height: 1.75; margin: 0 0 28px; }
.enrollment-form { margin: 0; }
.enrollment-form fieldset { margin: 0 0 28px; padding-bottom: 4px; border-bottom: 1px solid var(--border-color); }
.enrollment-form legend { font-size: 18px; padding-bottom: 20px; }
.enrollment-form .form-group { margin-bottom: 20px; }
.enrollment-form :is(input:not([type='hidden']), select, textarea) { border-radius: 6px; }
.enrollment-form textarea { min-height: 112px; }
.enrollment-form .btn-submit { width: 100%; }
.enrollment-form .form-link { display: flex; justify-content: center; align-items: center; min-height: 44px; margin-top: 12px; font-size: 14px; }
.enrollment-form .registration-challenge { margin-top: 28px; border-bottom: 0; padding-bottom: 0; margin-bottom: 24px; }
.enrollment-form .registration-challenge .form-group { margin-bottom: 0; }
.enrollment-form .challenge-message { font-size: 14px; color: var(--muted); margin: 0 0 16px; }
.challenge-controls { display: flex; align-items: stretch; gap: 12px; }
.enrollment-form .challenge-controls input { width: 120px; flex: 0 1 120px; }
.challenge-refresh { min-height: 48px; padding: 10px 16px; border: 1px solid var(--border-color); border-radius: 6px; background: transparent; color: var(--text-color); font-size: 14px; font-weight: 600; }
.challenge-refresh:is(:hover, :focus-visible) { border-color: var(--accent-color); color: var(--accent-color); background: var(--accent-tint); }
@media (max-width: 700px) {
    .enrollment-container { margin-top: 24px; }
    .enrollment-form .form-grid { gap: 0; }
}

/* Answers read as an open conversation; the copy control stays with the author. */
.chat-message.bot { padding: 8px 0 20px; }
.message-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; width: 100%; margin-bottom: 14px; }
.message-heading .message-author { margin: 0; font-size: 12px; font-weight: 600; color: var(--text-color); }
.message-heading .message-actions { padding: 0; }
.message-actions .copy-answer { display: grid; place-items: center; width: 44px; height: 44px; padding: 0; border: 0; border-radius: 6px; background: transparent; color: var(--muted); }
.message-actions .copy-answer:hover { background: var(--surface-soft); border-color: var(--accent-color); }
.message-actions .copy-answer.is-copied { color: var(--success-text-light); background: var(--success-bg-light); }
.chat-message.bot.error { padding: 14px 16px; border-left: 3px solid var(--error-text-light); background: var(--error-bg-light); color: var(--error-text-light); }
.chat-message.bot.error .message-author { color: inherit; }
@media (min-width: 701px) { .chat-message.bot { padding: 8px 0 24px; } }
@media (max-height: 500px) { .chat-ideas-panel { max-height: 25dvh; } }

/* Account identity, study access, and security have separate, predictable places. */
.profile-page .account-layout { max-width: 1000px; padding-block: 28px 48px; }
.account-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.account-heading h1 { font-size: var(--page-heading-size); margin: 0; }
.account-logout { min-height: 44px; display: inline-flex; align-items: center; padding: 8px 12px; border: 1px solid var(--border-color); border-radius: 6px; text-decoration: none; font-size: 13px; }
.account-overview { border: 0; }
.account-identity { display: flex; align-items: center; gap: 14px; }
.account-identity > div { min-width: 0; }
.account-avatar { display: grid; place-items: center; width: 48px; height: 48px; flex-shrink: 0; border-radius: 8px; background: var(--accent-tint); color: var(--accent-color); font: 600 22px/1 var(--font-heading); }
.account-identity h2 { font-size: 21px; margin: 0 0 4px; overflow-wrap: anywhere; }
.account-identity p { margin: 0; font-size: 13px; color: var(--muted); overflow-wrap: anywhere; }
.account-membership { display: grid; grid-template-columns: 1fr; gap: 18px; margin: 24px 0 0; padding: 18px; background: var(--surface-soft); border-radius: 6px; }
.account-membership dt { color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.account-membership dd { margin: 0; font-size: 14px; }
.account-verification { color: var(--success-text-light); }
.account-verification.is-unverified { color: var(--muted); }
.account-sections { display: grid; gap: 28px; margin-top: 28px; }
.account-sections h2 { font-size: 22px; margin-bottom: 16px; }
.account-tool-links { display: grid; gap: 8px; }
.account-tool-links a { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 60px; padding: 16px; text-decoration: none; font-size: 14px; background: var(--surface-soft); border-radius: 6px; }
.account-tool-links a:hover { background: var(--accent-tint); }
.profile-page .password-settings { margin: 0; max-width: none; border: 0; border-radius: 6px; background: var(--surface-soft); }
.profile-page .password-settings summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; padding: 16px; font-size: 14px; list-style: none; }
.profile-page .password-settings summary::-webkit-details-marker { display: none; }
.profile-page .password-settings .auth-form { padding: 20px 16px; margin: 0; border: 0; border-radius: 0; background: transparent; box-shadow: none; }
.profile-page #change-password { scroll-margin-top: 100px; }
@media (min-width: 480px) { .account-membership { grid-template-columns: 1fr 1fr; } }
@media (min-width: 768px) {
    .profile-page .account-layout { padding-block: 40px 64px; }
    .account-overview { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 32px; }
    .account-membership { margin: 0; padding: 18px; border: 0; }
    .account-sections { grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 36px; }
}

/* Questions are a compact starting point and disappear once the conversation begins. */
.account-tool-links a svg { color: var(--accent-color); transition: transform 240ms var(--ease); }
.account-tool-links a:is(:hover, :focus-visible) svg { transform: translateX(3px); }
.account-sections h2 { font-size: var(--section-heading-size); }
@media (prefers-reduced-motion: reduce) {
    .account-tool-links a svg { transition: none; }
    .account-tool-links a:is(:hover, :focus-visible) svg { transform: none; }
}

/* One row of starting examples; horizontal movement belongs to this strip only. */
.chat-ideas-panel { display: flex; align-items: center; gap: 8px; flex-shrink: 0; padding: 10px 16px; min-width: 0; border-top: 1px solid var(--border-color); }
.chat-ideas-panel .sample-questions-wrapper { display: contents; }
.sample-questions-heading { flex: 0 0 auto; }
.sample-questions-heading p { display: none; }
.sample-questions { display: flex; gap: 8px; overflow-x: auto; min-width: 0; scroll-snap-type: x proximity; scrollbar-width: none; -ms-overflow-style: none; padding: 4px; }
.sample-questions::-webkit-scrollbar { display: none; }
.sample-question-bubble { display: inline-flex; align-items: center; gap: 8px; flex: 0 0 auto; max-width: min(75vw, 340px); min-height: 44px; padding: 8px 12px; border: 1px solid var(--border-color); border-radius: 6px; background: var(--surface-soft); color: var(--text-color); font-size: 12px; line-height: 1.5; text-align: left; scroll-snap-align: start; }
.sample-question-bubble > span:first-child { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sample-question-bubble > span:last-child { color: var(--accent-color); flex-shrink: 0; }
.sample-question-bubble:is(:hover, :focus-visible) { background: var(--accent-tint); border-color: var(--accent-color); }
@media (min-width: 701px) { .chat-ideas-panel { padding-inline: 28px; } }