:root {

    --navy-900: #17365D;
    --navy-900-rgb: 23, 54, 93;
    --secondary: #4F5D73;
    --ink: #102A43;
    --ink-soft: #626E83;
    --border: #E8EBF0;
    --bg-page: #F7F8FA;
    --surface: #FFFFFF;

    --tint-blue: #EEF4FF;
    --tint-green: #EEF9F3;
    --tint-purple: #F3F0FF;
    --whatsapp: #25D366;
    --whatsapp-text: #11743A;
    --focus: #3A5A95;
    --link: #3A5A95;
    --accent-soft: #BACAE8;
    --border-strong: #8A94A6;

    --success: #0E7A4F;
    --success-bg: #ECFDF5;
    --success-border: #A7F3D0;
    --warning: #F59E0B;
    --warning-bg: #FFFBEB;
    --warning-border: #FDE68A;
    --danger: #B42318;
    --danger-bg: #FEF2F2;
    --danger-border: #FECACA;

    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 20px;
    --radius-2xl: 22px;
    --radius-3xl: 28px;
    --radius-pill: 999px;

    --glass-white-50: rgba(255, 255, 255, 0.5);
    --glass-white-55: rgba(255, 255, 255, 0.55);
    --glass-white-60: rgba(255, 255, 255, 0.6);
    --glass-white-65: rgba(255, 255, 255, 0.65);
    --glass-white-70: rgba(255, 255, 255, 0.7);
    --glass-white-80: rgba(255, 255, 255, 0.8);
    --glass-white-85: rgba(255, 255, 255, 0.85);
    --glass-white-90: rgba(255, 255, 255, 0.9);
    --glass-white-97: rgba(255, 255, 255, 0.97);
    --glass-border: var(--glass-white-60);

    --glass-blur-xs: blur(10px);
    --glass-blur-sm: blur(14px);
    --glass-blur-md: blur(16px) saturate(160%);
    --glass-blur-lg: blur(18px) saturate(160%);
    --glass-blur-xl: blur(20px) saturate(160%);
    --glass-blur-2xl: blur(26px) saturate(160%);

    --shadow-color: 16, 42, 67;
    --shadow-color-strong: 23, 54, 93;
  }

  * { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

  button, a { touch-action: manipulation; }

  :focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
  }

  .pill:focus-within {
    border-color: rgba(58, 90, 149, 0.45);
  }

  .upload-card:has(.file-picker-input:focus-visible) .file-picker {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
  }

  html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: var(--bg-page);
    font-family: var(--font-sans);
    color: var(--ink);
  }

  body {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    position: relative;
    padding-top: 56px;
  }

  .glow {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
    background: var(--bg-page);
  }

  .glow::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 55%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(238, 244, 255, 0.6) 100%);
  }

  .topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    pointer-events: none;
  }

  .topbar > * { pointer-events: auto; }

  .menu-toggle-btn {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-white-60);
    background: var(--glass-white-85);
    backdrop-filter: var(--glass-blur-xs);
    -webkit-backdrop-filter: var(--glass-blur-xs);
    color: var(--navy-900);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.04);
    transition: 0.15s ease;
  }

  @media (hover: hover) and (pointer: fine) {
    .menu-toggle-btn:hover { background: var(--bg-page); border-color: rgba(var(--navy-900-rgb), 0.2); }
  }

  .side-panel-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1400;
    background: rgba(var(--shadow-color-strong), 0.3);
  }

  .side-panel-backdrop.open { display: block; }

  .side-panel {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 320px;
    max-width: 86vw;
    background: var(--surface);
    z-index: 1500;
    transform: translateX(-100%);
    transition: transform 0.28s ease;
    box-shadow: 0 0 40px rgba(var(--shadow-color-strong), 0.1);
    overflow-y: auto;
    border-right: 1px solid var(--border);
  }

  .side-panel.open { transform: translateX(0); }

  .side-panel-inner {
    padding: 18px 18px 24px;
    min-height: 100%;
    display: flex;
    flex-direction: column;
  }

  .side-panel-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 18px;
  }

  .side-panel-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
  }

  .side-panel-avatar {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 14px;
  }

  .side-panel-brand-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
  }

  .side-panel-brand-title {
    font-family: var(--font-sans);
    font-size: 19px;
    font-weight: 600;
    color: var(--navy-900);
    letter-spacing: -0.01em;
  }

  .side-panel-brand-sub {
    font-family: var(--font-sans);
    font-size: 12.5px;
    font-weight: 400;
    color: var(--ink-soft);
  }

  .panel-new-chat {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 11px 14px;
    margin-bottom: 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--bg-page);
    color: var(--navy-900);
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 15px;
    cursor: pointer;
    transition: 0.15s ease;
  }

  .panel-new-chat-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .panel-new-chat-label {
    flex: 1;
    text-align: left;
    min-width: 0;
  }

  @media (hover: hover) and (pointer: fine) {
    .panel-new-chat:hover { background: var(--border); }
  }

  .side-panel-close {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--navy-900);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }

  @media (hover: hover) and (pointer: fine) {
    .side-panel-close:hover { background: var(--bg-page); border-color: rgba(var(--navy-900-rgb), 0.2); }
  }

  .panel-section {
    border-top: 1px solid var(--border);
    padding-top: 16px;
    margin-top: 16px;
  }

  .panel-section:first-of-type { border-top: none; margin-top: 0; padding-top: 0; }

  .panel-footer {
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px solid var(--border);
  }

  .panel-footer-info {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    color: var(--ink-soft);
  }

  .panel-footer-info svg { flex-shrink: 0; margin-top: 1px; }

  .panel-footer-info span {
    font-family: var(--font-sans);
    font-size: 11.5px;
    line-height: 1.5;
  }

  .panel-footer-org {
    margin: 10px 0 0;
    font-family: var(--font-sans);
    font-size: 11.5px;
    line-height: 1.5;
    color: var(--ink-soft);
    text-align: center;
  }

  .panel-section-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    background: none;
    border: none;
    padding: 9px 2px;
    cursor: pointer;
    font-family: var(--font-sans);
  }

  .panel-section-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary);
  }

  .panel-section-label {
    flex: 1;
    min-width: 0;
    text-align: left;
    font-size: 15px;
    font-weight: 500;
    color: var(--navy-900);
    letter-spacing: normal;
    text-transform: none;
  }

  .panel-section-toggle .chev { flex-shrink: 0; transition: transform 0.2s ease; color: var(--ink-soft); }
  .panel-section-toggle.open .chev { transform: rotate(180deg); }

  .panel-section-body {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 8px 2px 4px;
  }

  .panel-section-body.collapsed { display: none; }

  .quick-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-white-60);
    background: var(--glass-white-85);
    backdrop-filter: var(--glass-blur-xs);
    -webkit-backdrop-filter: var(--glass-blur-xs);
    color: var(--navy-900);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.03);
    transition: 0.15s ease;
  }

  .quick-link-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--navy-900);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .quick-link-label {
    flex: 1;
    min-width: 0;
  }

  .quick-link-chevron {
    flex-shrink: 0;
    color: var(--ink-soft);
  }

  .link-group {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--surface);
  }

  .link-group .quick-link {
    border: none;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }

  .link-group .quick-link + .quick-link {
    border-top: 1px solid var(--border);
  }

  .calendar-file-link {
    box-shadow: none;
    font-weight: 500;
  }

  #linksSection .quick-link-label {
    font-weight: 500;
  }

  @media (hover: hover) and (pointer: fine) {
    .quick-link:hover { border-color: rgba(var(--navy-900-rgb), 0.18); background: var(--bg-page); }
  }

  .feedback-note {
    font-size: 11.5px;
    line-height: 1.5;
  }

  .feedback-input, .feedback-textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    font-family: var(--font-sans);
    font-size: 14px;
    color: var(--ink);
    background: var(--surface);
    resize: vertical;
    box-sizing: border-box;
  }

  .feedback-input:focus, .feedback-textarea:focus { border-color: rgba(var(--navy-900-rgb), 0.35); outline: none; }

  .feedback-group {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--surface);
  }

  .feedback-group .feedback-input,
  .feedback-group .feedback-textarea {
    border: none;
    border-radius: 0;
  }

  .feedback-group .feedback-input {
    border-bottom: 1px solid var(--border);
  }

  .feedback-group .feedback-input:focus,
  .feedback-group .feedback-textarea:focus {
    border-color: var(--border);
  }

  .feedback-group .feedback-input:focus {
    border-bottom-color: var(--border);
  }

  .feedback-group:focus-within {
    border-color: rgba(var(--navy-900-rgb), 0.35);
  }

  .feedback-group.error,
  .feedback-group.error:focus-within {
    border-color: var(--danger);
  }

  .panel-action-btn {
    width: 100%;
    margin-top: 4px;
    padding: 11px 14px;
    border-radius: var(--radius-md);
    border: none;
    background: var(--navy-900);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.15s ease;
  }

  @media (hover: hover) and (pointer: fine) {
    .panel-action-btn:hover { background: #0F2743; }
  }

  .panel-action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }

  .calendar-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--surface);
  }

  .today-widget {
    display: none;
    padding: 12px 14px;
    background: var(--bg-page);
  }

  .today-widget.visible {
    display: block;
    border-bottom: 1px solid var(--border);
  }

  .today-row-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
  }

  .today-row-title {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 600;
    line-height: 20px;
    color: var(--navy-900);
  }

  .today-badge {
    flex-shrink: 0;
    color: var(--navy-900);
    font-family: var(--font-sans);
    font-size: 11.5px;
    font-weight: 600;
    white-space: nowrap;
  }

  .academic-calendar {
    display: flex;
    flex-direction: column;
  }

  .calendar-card .calendar-file-link {
    border: none;
    border-radius: 0;
  }

  .muted {
    font-size: 14px;
    line-height: 20px;
    color: var(--ink-soft);
    margin: 0;
  }

  .muted.success { color: var(--success); }
  .muted.error { color: var(--danger); }

  .reset-btn {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-white-60);
    background: var(--glass-white-85);
    backdrop-filter: var(--glass-blur-xs);
    -webkit-backdrop-filter: var(--glass-blur-xs);
    color: var(--navy-900);
    cursor: pointer;
    transition: 0.15s ease;
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.04);
  }

  @media (hover: hover) and (pointer: fine) {
    .reset-btn:hover { background: var(--bg-page); border-color: rgba(var(--navy-900-rgb), 0.2); }
  }

  main {
    position: relative;
    z-index: 1;
    flex: 1;
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    padding: 0 24px 160px;
  }

  .hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    text-align: left;
    padding: 24px 0 12px 10px;
    transition: opacity 0.35s ease;
  }

  .hero.hidden { display: none; }

  .hero-mascot {
    display: none;
  }

  .hero h1 {
    font-family: var(--font-sans);
    font-size: 34px;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin: 0 0 10px;
    max-width: 460px;
  }

  .hero-line-1 {
    display: block;
    font-weight: 400;
    color: var(--secondary);
  }

  .hero-line-2 {
    display: block;
    font-weight: 700;
    color: var(--ink);
  }

  .hero p {
    font-family: var(--font-sans);
    font-weight: 400;
    font-size: 15px;
    line-height: 22px;
    color: var(--secondary);
    max-width: 440px;
    margin: 0 0 8px;
    text-align: left;
  }

  .whatsapp-join-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    max-width: 460px;
    margin-top: 18px;
    padding: 12px 14px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--glass-white-60);
    background: linear-gradient(135deg, rgba(37, 211, 102, 0.16) 0%, var(--tint-blue) 100%);
    backdrop-filter: var(--glass-blur-xs);
    -webkit-backdrop-filter: var(--glass-blur-xs);
    cursor: pointer;
    transition: 0.15s ease;
  }

  @media (hover: hover) and (pointer: fine) {
    .whatsapp-join-btn:hover { border-color: rgba(37, 211, 102, 0.4); }
  }

  .whatsapp-join-icon {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--surface);
    color: var(--whatsapp-text);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .whatsapp-join-text {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
    text-align: left;
  }

  .whatsapp-join-label {
    font-family: var(--font-sans);
    font-size: 14.5px;
    font-weight: 600;
    color: var(--ink);
  }

  .whatsapp-join-chevron {
    flex-shrink: 0;
    color: var(--ink-soft);
  }

  .hero-chips {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 16px;
    max-width: 460px;
    width: 100%;
    align-content: start;
  }

  .chip {
    display: flex;
    align-items: center;
    gap: 10px;
    border: 1px solid var(--glass-white-60);
    background: var(--glass-white-85);
    backdrop-filter: var(--glass-blur-xs);
    -webkit-backdrop-filter: var(--glass-blur-xs);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 13.5px;
    font-weight: 500;
    line-height: 1.3;
    padding: 12px;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: 0.18s ease;
    white-space: normal;
    text-align: left;
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.04);
  }

  .chip-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--navy-900);
  }

  .chip-label {
    flex: 1;
    min-width: 0;
    color: var(--ink);
  }

  @media (hover: hover) and (pointer: fine) {
    .chip:hover {
      background: var(--bg-page);
      border-color: rgba(var(--navy-900-rgb), 0.22);
    }
  }

  .messages {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding-top: 18px;
  }

  .messages.hidden { display: none; }

  .msg {
    max-width: 84%;
    font-family: var(--font-sans);
    font-weight: 400;
    font-size: 16px;
    line-height: 24px;
    animation: rise 0.25s ease;
  }

  @keyframes rise {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .msg.user {
    align-self: flex-end;
    background: var(--tint-blue);
    border: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.03);
    color: var(--ink);
    padding: 11px 16px;
    border-radius: var(--radius-lg) var(--radius-lg) 4px var(--radius-lg);
  }

  .msg.bot {
    align-self: flex-start;
    width: 100%;
    max-width: 100%;
    color: var(--ink);
    padding: 2px 0;
  }

  .msg.bot strong { color: var(--ink); }

  .msg.bot.typing-cursor::after {
    content: '';
    display: inline-block;
    width: 2px;
    height: 1em;
    margin-left: 2px;
    vertical-align: -0.15em;
    background: var(--ink-soft);
    animation: blink-cursor 0.9s steps(1) infinite;
  }

  @keyframes blink-cursor {
    50% { opacity: 0; }
  }

  .msg-actions {
    display: flex;
    gap: 4px;
    margin: 2px 0 4px;
  }

  .msg-action-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 8px;
    border: none;
    background: none;
    border-radius: var(--radius-sm);
    color: var(--secondary);
    font-family: var(--font-sans);
    font-size: 12px;
    line-height: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: 0.15s ease;
  }

  @media (hover: hover) and (pointer: fine) {
    .msg-action-btn:hover { background: var(--bg-page); color: var(--ink); }
  }

  .msg-action-btn.success { color: var(--navy-900); }

  .msg-sources {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: -4px 0 0;
    max-width: 620px;
  }

  .source-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
  }

  .source-row-label {
    font-family: var(--font-sans);
    font-size: 12px;
    line-height: 16px;
    font-weight: 500;
    color: var(--ink-soft);
  }

  .source-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 30px;
    padding: 0 12px 0 8px;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--secondary);
    font-family: var(--font-sans);
    font-size: 12px;
    line-height: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: 0.15s ease;
  }

  .source-chip-num {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--tint-blue);
    color: var(--navy-900);
    font-size: 11px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-variant-numeric: tabular-nums;
  }

  @media (hover: hover) and (pointer: fine) {
    .source-chip:hover { border-color: var(--border-strong); color: var(--ink); }
  }

  .source-chip[aria-expanded="true"] {
    border-color: var(--navy-900);
    background: var(--tint-blue);
    color: var(--ink);
  }

  .source-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.04);
    overflow: hidden;
    animation: rise 0.2s ease;
  }

  .source-card[hidden] { display: none; }

  .source-card-head {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 12px 12px 16px;
    border-bottom: 1px solid var(--border);
  }

  .source-card-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--tint-blue);
    color: var(--navy-900);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .source-card-title {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
  }

  .source-card-title b {
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 20px;
    font-weight: 600;
    color: var(--ink);
  }

  .source-card-title span {
    font-family: var(--font-sans);
    font-size: 12px;
    line-height: 16px;
    color: var(--ink-soft);
  }

  .source-card-close {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }

  @media (hover: hover) and (pointer: fine) {
    .source-card-close:hover { background: var(--bg-page); color: var(--ink); }
  }

  .source-card-quote {
    margin: 12px 16px;
    padding-left: 12px;
    border-left: 3px solid var(--accent-soft);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 22px;
    color: var(--secondary);
  }

  .source-card-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0 16px 12px;
    font-family: var(--font-sans);
    font-size: 12px;
    line-height: 16px;
    color: var(--ink-soft);
  }

  .source-card-ask {
    background: none;
    border: none;
    padding: 4px 0;
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 500;
    color: var(--link);
    text-decoration: underline;
    text-underline-offset: 2px;
    cursor: pointer;
  }

  .msg-link {
    color: #2563eb;
    text-decoration: underline;
    word-break: break-word;
  }

  @media (hover: hover) and (pointer: fine) {
    .msg-link:hover { color: #1d4ed8; }
  }
  .msg.bot ul { margin: 6px 0; padding-left: 18px; }
  .msg.bot li { margin: 3px 0; }

  .msg.error {
    align-self: flex-start;
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: var(--danger);
    padding: 11px 16px;
    border-radius: 4px var(--radius-lg) var(--radius-lg) var(--radius-lg);
    font-size: 14px;
    line-height: 20px;
  }

  .menu-item.back:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }

  .menu-card {
    align-self: stretch;
    background: var(--glass-white-85);
    backdrop-filter: var(--glass-blur-xs);
    -webkit-backdrop-filter: var(--glass-blur-xs);
    border: 1px solid var(--glass-white-60);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.04);
    padding: 16px;
  }

  .submenu-title {
    font-family: var(--font-sans);
    font-size: 12px;
    line-height: 16px;
    letter-spacing: 0;
    color: var(--ink-soft);
    margin: 0 0 10px;
    font-weight: 500;
  }

  .menu-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 340px;
    overflow-y: auto;
    padding-right: 2px;
  }

  .menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    text-align: left;
    border: 1px solid var(--glass-white-60);
    background: var(--glass-white-85);
    backdrop-filter: var(--glass-blur-xs);
    -webkit-backdrop-filter: var(--glass-blur-xs);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 20px;
    font-weight: 500;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: 0.15s ease;
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.03);
  }

  .menu-item-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--navy-900);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .whatsapp-class-badge {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--tint-green);
    color: var(--whatsapp-text);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
  }

  .whatsapp-note {
    margin-top: 10px;
  }

  .upload-card {
    display: flex;
    flex-direction: column;
  }

  .upload-intro {
    margin: -4px 0 10px;
    font-size: 13px;
  }

  .file-picker {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border: 1px dashed var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-page);
    color: var(--secondary);
    cursor: pointer;
    transition: 0.15s ease;
    margin-bottom: 10px;
  }

  @media (hover: hover) and (pointer: fine) {
    .file-picker:hover { background: var(--border); }
  }

  .file-picker-label {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    color: var(--navy-900);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .file-picker-input {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }

  .upload-status {
    margin: 0 0 10px;
    font-size: 13px;
  }

  .upload-status.success { color: var(--whatsapp-text); }

  .upload-consent {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin: 0 0 12px;
    font-size: 12px;
    line-height: 16px;
    color: var(--ink-soft);
    cursor: pointer;
  }

  .upload-consent input[type="checkbox"] {
    margin-top: 2px;
    flex-shrink: 0;
  }

  .upload-submit:disabled {
    opacity: 0.45;
    cursor: not-allowed;
  }

  .a2hs-action.whatsapp-invite-link {
    background: var(--navy-900);
  }

  @media (hover: hover) and (pointer: fine) {
    .a2hs-action.whatsapp-invite-link:hover { background: #0F2743; }
  }

  .upload-retry {
    margin-top: 10px;
  }

  .menu-item-label {
    flex: 1;
    min-width: 0;
  }

  @media (hover: hover) and (pointer: fine) {
    .menu-item:hover {
      background: var(--bg-page);
      border-color: rgba(var(--navy-900-rgb), 0.18);
    }
  }

  .menu-item.back {
    background: var(--bg-page);
    color: var(--ink);
    border-color: var(--border);
    justify-content: center;
    font-weight: 600;
    margin-top: 4px;
  }

  @media (hover: hover) and (pointer: fine) {
    .menu-item.back:hover { background: var(--surface); border-color: rgba(var(--navy-900-rgb), 0.2); }
  }

  .typing {
    align-self: flex-start;
    display: flex;
    gap: 4px;
    padding: 15px 17px;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.04);
    border-radius: 4px var(--radius-lg) var(--radius-lg) var(--radius-lg);
  }

  .typing span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ink-soft);
    animation: bounce 1.1s infinite ease-in-out;
  }
  .typing span:nth-child(2) { animation-delay: 0.15s; }
  .typing span:nth-child(3) { animation-delay: 0.3s; }

  @keyframes bounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.5; }
    30% { transform: translateY(-4px); opacity: 1; }
  }

  .input-dock {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 14px 24px 20px;
    background: linear-gradient(180deg, rgba(247,248,250,0), rgba(247,248,250,0.94) 30%);
  }

  .scroll-bottom-btn {
    position: fixed;
    left: 50%;
    bottom: 132px;
    z-index: 4;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.08);
    color: var(--ink);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .scroll-bottom-btn.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, 0);
  }

  @media (hover: hover) and (pointer: fine) {
    .scroll-bottom-btn:hover { background: var(--bg-page); border-color: rgba(var(--navy-900-rgb), 0.2); }
  }

  .a2hs-modal { max-width: 340px; }

  .a2hs-modal-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 14px;
  }

  .a2hs-icon-lg {
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px rgba(var(--shadow-color), 0.08);
  }

  .a2hs-desc {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    color: var(--ink);
  }

  .a2hs-steps {
    width: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: left;
  }

  .a2hs-step {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: var(--radius-md);
    background: var(--bg-page);
    border: 1px solid var(--border);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 20px;
    color: var(--ink);
  }

  .a2hs-step-icon {
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--navy-900);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .a2hs-action {
    width: 100%;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    border: none;
    background: var(--navy-900);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.15s ease;
  }

  @media (hover: hover) and (pointer: fine) {
    .a2hs-action:hover { background: #0F2743; }
  }

  .pill {
    width: 100%;
    max-width: 680px;
    display: flex;
    align-items: flex-end;
    gap: 10px;
    background: var(--glass-white-85);
    backdrop-filter: var(--glass-blur-sm);
    -webkit-backdrop-filter: var(--glass-blur-sm);
    border-radius: var(--radius-3xl);
    padding: 8px 8px 8px 20px;
    box-shadow: 0 10px 34px rgba(var(--shadow-color), 0.12);
    border: 1px solid var(--glass-white-60);
  }

  .pill textarea {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 24px;
    max-height: 100px;
    padding: 10px 0;
    background: transparent;
    color: var(--ink);
  }

  .pill textarea::placeholder { color: var(--ink-soft); }

  .pill textarea:disabled { opacity: 0.55; cursor: not-allowed; }

  .send-btn {
    flex-shrink: 0;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: none;
    background: var(--navy-900);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.15s ease;
  }

  @media (hover: hover) and (pointer: fine) {
    .send-btn:hover:not(:disabled) { background: #0F2743; }
  }
  .send-btn:disabled { opacity: 0.4; cursor: not-allowed; }

  .send-btn.stop {
    background: var(--navy-900);
    color: #fff;
  }

  @media (hover: hover) and (pointer: fine) {
    .send-btn.stop:hover { background: #0F2743; }
  }

  .disclaimer {
    margin-top: 10px;
    font-size: 11px;
    color: var(--ink-soft);
    text-align: center;
  }

  .privacy-link {
    background: none;
    border: none;
    padding: 0;
    font-size: 11px;
    color: var(--ink-soft);
    text-decoration: underline;
    cursor: pointer;
    font-family: var(--font-sans);
  }

  @media (hover: hover) and (pointer: fine) {
    .privacy-link:hover { color: var(--navy-900); }
  }

  .privacy-link-dot {
    font-size: 11px;
    color: var(--ink-soft);
  }

  .privacy-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(var(--shadow-color-strong), 0.4);
    align-items: center;
    justify-content: center;
    padding: 20px;
  }

  .privacy-overlay.open { display: flex; }

  .privacy-modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-2xl);
    max-width: 480px;
    width: 100%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 50px rgba(var(--shadow-color-strong), 0.2);
    overflow: hidden;
  }

  .privacy-modal-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 20px 20px 14px 24px;
    border-bottom: 1px solid var(--border);
  }

  .privacy-modal-header h2 {
    font-family: var(--font-sans);
    font-weight: 600;
    letter-spacing: -0.01em;
    font-size: 19px;
    color: var(--ink);
    margin: 0;
  }

  .privacy-modal-close {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-page);
    color: var(--navy-900);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }

  @media (hover: hover) and (pointer: fine) {
    .privacy-modal-close:hover { background: var(--surface); border-color: rgba(var(--navy-900-rgb), 0.2); }
  }

  .privacy-modal-body {
    overflow-y: auto;
    padding: 18px 24px 26px;
  }

  .privacy-modal-body p {
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 20px;
    color: var(--ink);
    margin: 0 0 12px;
  }

  .confirm-modal { max-width: 360px; }

  .confirm-actions {
    display: flex;
    gap: 10px;
    margin-top: 4px;
  }

  .confirm-btn {
    flex: 1;
    padding: 11px 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.15s ease;
  }

  @media (hover: hover) and (pointer: fine) {
    .confirm-btn:hover { background: var(--bg-page); border-color: rgba(var(--navy-900-rgb), 0.2); }
  }

  .confirm-btn.danger {
    background: #a3402f;
    border-color: #a3402f;
    color: #fff;
  }

  @media (hover: hover) and (pointer: fine) {
    .confirm-btn.danger:hover { background: #8a3527; }
  }

  @media (max-width: 480px) {
    .hero h1 { font-size: 26px; }
    main { padding-bottom: 150px; }
  }

  @media (min-width: 900px) {
    main {
      max-width: 920px;
    }

    .hero {
      padding: 40px 0 20px;
    }

    .hero h1 {
      font-size: 40px;
      max-width: 680px;
    }

    .hero p {
      font-size: 16px;
      line-height: 24px;
      max-width: 520px;
    }

    .whatsapp-join-btn {
      max-width: 920px;
      margin-top: 22px;
    }

    .hero-chips {
      grid-template-columns: repeat(4, minmax(0, 1fr));
      max-width: 920px;
      gap: 14px;
      margin-top: 20px;
    }

    .chip {
      padding: 14px;
      font-size: 14px;
    }

    .chip-icon {
      width: 22px;
      height: 22px;
    }

    .messages {
      max-width: 920px;
      margin: 0 auto;
      width: 100%;
    }

    .msg {
      max-width: 620px;
    }

    .menu-card {
      max-width: 620px;
    }

    .input-dock .pill {
      max-width: 760px;
    }

    .side-panel {
      width: 360px;
    }

    .side-panel-backdrop {
      display: none !important;
    }

    body {
      margin-left: 0;
      transition: margin-left 0.28s ease;
    }

    .topbar,
    .input-dock {
      left: 0;
      transition: left 0.28s ease;
    }

    body.panel-open {
      margin-left: 360px;
    }

    body.panel-open .topbar,
    body.panel-open .input-dock {
      left: 360px;
    }
  }


  .maintenance {
    display: none;
  }

  html[data-maintenance="on"] body {
    overflow: hidden;
  }

  html[data-maintenance="on"] .maintenance {
    position: fixed;
    inset: 0;
    z-index: 5000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
    overflow-y: auto;
    background: rgba(247, 248, 250, 0.72);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
  }

  .maintenance-card {
    width: 100%;
    max-width: 440px;
    margin: auto;
    padding: 32px 28px 24px;
    border-radius: var(--radius-3xl);
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 20px 50px rgba(var(--shadow-color), 0.14);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    font-family: var(--font-sans);
  }



  .maintenance-mascot {
    width: 96px;
    height: auto;
    margin: 8px 0 4px;
  }

  .maintenance-title {
    margin: 0;
    font-size: 28px;
    line-height: 1.15;
    letter-spacing: -0.02em;
  }

  .maintenance-title span {
    display: block;
  }

  .maintenance-title span:first-child {
    font-weight: 400;
    color: var(--secondary);
  }

  .maintenance-title span:last-child {
    font-weight: 700;
    color: var(--ink);
  }

  .maintenance-desc {
    margin: 4px 0 0;
    font-size: 15px;
    line-height: 22px;
    color: var(--ink);
    max-width: 360px;
  }


  .maintenance-actions {
    display: flex;
    gap: 10px;
    width: 100%;
    margin-top: 8px;
  }

  .maintenance-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--ink);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: 0.15s ease;
  }

  .maintenance-btn.primary {
    background: var(--navy-900);
    border-color: var(--navy-900);
    color: #fff;
  }

  @media (hover: hover) and (pointer: fine) {
    .maintenance-btn:hover { background: var(--bg-page); border-color: var(--border-strong); }
    .maintenance-btn.primary:hover { background: #0F2743; border-color: #0F2743; }
  }

  .maintenance-org {
    margin: 12px 0 0;
    padding-top: 14px;
    border-top: 1px solid var(--border);
    width: 100%;
    font-size: 11.5px;
    line-height: 16px;
    color: var(--ink-soft);
  }

  @media (max-width: 380px) {
    .maintenance-actions { flex-direction: column; }
  }