styles.css

:root {
  --paper: #f4f1e8;
  --paper-2: #ebe7dc;
  --ink: #172521;
  --muted: #66716c;
  --line: #d7d4ca;
  --deep: #193b33;
  --deep-2: #102d27;
  --acid: #c7f36a;
  --white: #fffefa;
  --danger: #9a3f34;
  --shadow: 0 24px 70px rgba(20, 42, 35, .18);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 15px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; overflow: hidden; }
button, textarea, input { font: inherit; }
button { color: inherit; }

.app-shell { min-height: 100%; display: grid; grid-template-columns: 286px minmax(0, 1fr); }
.sidebar { height: 100vh; background: var(--deep); color: #edf5ee; padding: 25px 18px 18px; display: flex; flex-direction: column; border-right: 1px solid rgba(255,255,255,.06); }
.brand-row { display: flex; align-items: center; justify-content: space-between; padding: 0 8px 24px; }
.brand { color: inherit; text-decoration: none; display: flex; gap: 11px; align-items: center; font-family: Georgia, serif; font-weight: 700; font-size: 21px; letter-spacing: -.3px; }
.brand-mark { width: 25px; height: 25px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 3px; transform: rotate(3deg); }
.brand-mark i { display: block; background: var(--acid); border-radius: 1px; }
.brand-mark i:nth-child(2), .brand-mark i:nth-child(3) { opacity: .48; }
.new-chat-button { border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.06); color: #fff; border-radius: 10px; padding: 12px 14px; width: 100%; display: flex; gap: 10px; align-items: center; cursor: pointer; transition: .2s ease; }
.new-chat-button:hover { background: rgba(255,255,255,.11); border-color: rgba(255,255,255,.3); }
.new-chat-button span { color: var(--acid); font-size: 18px; }
.history-label { margin: 28px 7px 10px; display: flex; justify-content: space-between; color: #91a39d; font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.conversation-list { min-height: 0; overflow-y: auto; flex: 1; scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.2) transparent; }
.conversation-item { position: relative; width: 100%; text-align: left; background: transparent; border: 0; border-radius: 9px; padding: 11px 34px 11px 11px; color: #becbc6; cursor: pointer; display: block; }
.conversation-item:hover, .conversation-item.active { color: white; background: rgba(255,255,255,.09); }
.conversation-item strong, .conversation-item small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conversation-item strong { font-size: 13px; font-weight: 600; }
.conversation-item small { font-size: 11px; margin-top: 2px; color: #82978f; }
.conversation-delete { position: absolute; right: 8px; top: 12px; background: none; border: 0; color: #91a39d; opacity: 0; cursor: pointer; }
.conversation-item:hover .conversation-delete, .conversation-item:focus-within .conversation-delete { opacity: 1; }
.sidebar-footer { border-top: 1px solid rgba(255,255,255,.1); padding-top: 14px; }
.local-badge { display: flex; align-items: center; gap: 8px; padding: 8px 9px; color: #aac0b7; font-size: 12px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; background: #aab1ad; box-shadow: 0 0 0 3px rgba(170,177,173,.12); flex: none; }
.status-dot.ready { background: var(--acid); box-shadow: 0 0 0 3px rgba(199,243,106,.13); }
.status-dot.busy { background: #f2c45f; box-shadow: 0 0 0 3px rgba(242,196,95,.14); }
.status-dot.error { background: #e47868; box-shadow: 0 0 0 3px rgba(228,120,104,.14); }
.settings-button { display: flex; gap: 10px; align-items: center; width: 100%; border: 0; border-radius: 8px; background: transparent; color: #d2ddd8; padding: 10px 9px; cursor: pointer; }
.settings-button:hover { background: rgba(255,255,255,.07); }

.chat-panel { height: 100vh; min-width: 0; display: grid; grid-template-rows: auto 1fr auto; background: var(--paper); position: relative; }
.topbar { min-height: 78px; padding: 15px 34px; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 20px; background: rgba(244,241,232,.9); backdrop-filter: blur(16px); z-index: 5; }
.chat-heading { min-width: 0; }
.chat-heading h1 { margin: 0; font: 600 15px/1.3 ui-sans-serif, system-ui; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.privacy-line { color: var(--muted); font-size: 11px; margin-top: 3px; }
.privacy-line span { color: #557d70; font-size: 8px; margin-right: 3px; }
.model-pill { border: 1px solid var(--line); border-radius: 99px; background: rgba(255,255,255,.55); padding: 7px 12px; display: flex; align-items: center; gap: 8px; cursor: pointer; color: #4d5d57; font-size: 12px; white-space: nowrap; }
.messages { min-height: 0; overflow-y: auto; padding: 30px max(28px, calc((100% - 820px)/2)) 60px; scroll-behavior: smooth; }
.empty-state { min-height: 100%; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding-bottom: 2vh; }
.hero-mark { width: 52px; height: 52px; display: grid; grid-template-columns: 1fr 1fr; gap: 5px; margin-bottom: 24px; transform: rotate(2deg); }
.hero-mark span { background: var(--deep); border-radius: 2px; }
.hero-mark span:nth-child(2), .hero-mark span:nth-child(3) { background: #6f8d83; }
.eyebrow { margin: 0 0 12px; color: #688078; font-size: 10px; font-weight: 800; letter-spacing: .2em; }
.empty-state h2, .welcome-content h2 { font: 500 clamp(36px, 5vw, 58px)/1.02 Georgia, "Times New Roman", serif; letter-spacing: -.035em; margin: 0; }
.empty-copy { max-width: 550px; color: var(--muted); margin: 19px auto 28px; }
.suggestion-grid { width: min(100%, 750px); display: grid; grid-template-columns: repeat(3, 1fr); gap: 11px; }
.suggestion { position: relative; text-align: left; padding: 16px; background: rgba(255,255,255,.52); border: 1px solid var(--line); border-radius: 12px; cursor: pointer; min-height: 92px; transition: .2s; }
.suggestion:hover { background: var(--white); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(30,54,46,.08); }
.suggestion span, .suggestion small { display: block; }
.suggestion span { font-family: Georgia, serif; font-size: 16px; }
.suggestion small { margin-top: 5px; color: var(--muted); line-height: 1.35; }
.suggestion b { position: absolute; top: 13px; right: 14px; font-weight: 400; color: #718078; }

.message { max-width: 760px; margin: 0 auto 30px; animation: rise .25s ease both; }
.message-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.message-author { font-size: 11px; font-weight: 800; letter-spacing: .13em; color: #63756e; }
.message-actions { display: flex; gap: 4px; opacity: 0; transition: .2s; }
.message:hover .message-actions, .message:focus-within .message-actions { opacity: 1; }
.message-actions button { background: transparent; border: 0; color: #6e7d78; cursor: pointer; padding: 3px 6px; font-size: 12px; }
.message.user .message-body { background: var(--deep); color: #f8fbf7; padding: 15px 18px; border-radius: 14px 14px 3px 14px; margin-left: min(14vw, 120px); }
.message.assistant .message-body { font: 17px/1.7 Georgia, serif; color: #273c35; padding-right: 8px; }
.message-body { white-space: pre-wrap; word-break: break-word; }
.message.streaming .message-body::after { content: ''; display: inline-block; width: 7px; height: 17px; background: #5a766d; margin-left: 4px; vertical-align: -2px; animation: blink .8s infinite; }
.message-error { color: var(--danger); border-left: 2px solid var(--danger); padding-left: 13px; }
.edit-box { width: 100%; min-height: 110px; border: 1px solid #8fa199; border-radius: 10px; padding: 13px; resize: vertical; background: var(--white); color: var(--ink); outline: none; }
.edit-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }

.composer-wrap { padding: 0 max(28px, calc((100% - 820px)/2)) 17px; background: linear-gradient(transparent, var(--paper) 18%); }
.composer { background: var(--white); border: 1px solid #cecfc6; border-radius: 15px; padding: 12px 12px 10px 17px; box-shadow: 0 12px 40px rgba(33,50,44,.08); }
.composer:focus-within { border-color: #83988f; box-shadow: 0 14px 44px rgba(33,50,44,.12); }
.composer textarea { display: block; width: 100%; border: 0; outline: none; resize: none; background: transparent; color: var(--ink); max-height: 180px; line-height: 1.5; }
.composer textarea::placeholder { color: #8e9792; }
.composer-actions { display: flex; justify-content: space-between; align-items: end; min-height: 32px; }
.composer-hint { color: #8a938f; font-size: 10px; }
.send-button { width: 34px; height: 34px; border: 0; border-radius: 9px; background: var(--deep); color: var(--acid); font-size: 20px; cursor: pointer; }
.send-button:disabled { background: #d1d3cd; color: #969d99; cursor: not-allowed; }
.disclaimer { margin: 7px 0 0; text-align: center; color: #858e89; font-size: 10px; }

dialog { color: var(--ink); border: 0; padding: 0; box-shadow: var(--shadow); }
dialog::backdrop { background: rgba(8,27,23,.65); backdrop-filter: blur(5px); }
.welcome-dialog { width: min(920px, calc(100% - 32px)); border-radius: 18px; overflow: hidden; background: var(--paper); grid-template-columns: 42% 58%; }
.welcome-dialog[open] { display: grid; animation: dialog-in .3s ease; }
.dialog-close { width: 34px; height: 34px; border: 0; background: transparent; border-radius: 50%; font-size: 24px; cursor: pointer; color: #6e7975; }
.welcome-dialog > .dialog-close { position: absolute; top: 13px; right: 13px; z-index: 2; }
.welcome-visual { position: relative; min-height: 580px; background: var(--deep); overflow: hidden; display: grid; place-items: center; }
.welcome-visual::before { content: ''; position: absolute; width: 250px; height: 250px; border-radius: 50%; background: var(--acid); filter: blur(90px); opacity: .18; }
.orbit { position: absolute; border: 1px solid rgba(199,243,106,.25); border-radius: 50%; }
.orbit-one { width: 310px; height: 310px; }
.orbit-two { width: 220px; height: 400px; transform: rotate(52deg); }
.model-cube { position: relative; z-index: 2; width: 104px; height: 104px; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; transform: rotate(5deg); }
.model-cube span { background: var(--acid); border-radius: 4px; box-shadow: 0 0 35px rgba(199,243,106,.25); }
.model-cube span:nth-child(2), .model-cube span:nth-child(3) { opacity: .48; }
.welcome-content { padding: 58px 55px 35px; }
.welcome-content h2 { font-size: 45px; }
.welcome-content > p:not(.eyebrow):not(.requirements) { color: var(--muted); }
.privacy-card { display: flex; gap: 12px; align-items: start; background: #e5eadf; border-radius: 10px; padding: 13px 15px; margin: 22px 0 12px; }
.privacy-card > span { color: var(--deep); font-size: 22px; }
.privacy-card strong, .privacy-card small { display: block; }
.privacy-card small { color: var(--muted); margin-top: 2px; }
.model-state-card { border: 1px solid var(--line); background: rgba(255,255,255,.45); border-radius: 10px; padding: 15px; }
.state-card-row, .state-card-row > div { display: flex; align-items: center; gap: 9px; }
.state-card-row { justify-content: space-between; }
.state-card-row strong { font-size: 13px; }
.state-card-row > span { color: #687870; font-size: 12px; }
.model-state-card p { margin: 7px 0 0 16px; color: var(--muted); font-size: 12px; }
.progress-track { height: 5px; border-radius: 99px; background: #d9ddd3; overflow: hidden; margin: 13px 0 0 16px; }
.progress-track span { display: block; height: 100%; width: 0; background: var(--deep); transition: width .3s; }
.primary-button, .secondary-button, .danger-button, .text-button { border-radius: 9px; cursor: pointer; font-weight: 650; }
.primary-button { width: 100%; border: 0; background: var(--deep); color: white; padding: 13px 18px; margin-top: 13px; }
.primary-button:hover { background: var(--deep-2); }
.primary-button:disabled { background: #b8bcb6; cursor: not-allowed; }
.text-button { width: 100%; border: 0; background: transparent; padding: 11px; color: #65746e; }
.requirements { text-align: center; color: #8b938f; font-size: 10px; margin-top: 7px; }

.settings-dialog { width: min(650px, calc(100% - 30px)); max-height: min(720px, calc(100vh - 30px)); border-radius: 17px; background: var(--paper); }
.settings-dialog[open] { animation: dialog-in .25s ease; }
.settings-dialog header { padding: 25px 27px 20px; display: flex; justify-content: space-between; align-items: start; border-bottom: 1px solid var(--line); }
.settings-dialog h2 { margin: 0; font: 32px/1.1 Georgia, serif; }
.settings-body { padding: 24px 27px 28px; overflow-y: auto; }
.settings-section { padding: 0 0 24px; margin-bottom: 24px; border-bottom: 1px solid var(--line); }
.settings-section:last-child { border: 0; margin: 0; padding: 0; }
.settings-section h3 { margin: 0 0 6px; font-size: 13px; }
.settings-section > p, .danger-zone p { margin: 0 0 14px; color: var(--muted); font-size: 13px; }
.setting-card { border: 1px solid var(--line); border-radius: 11px; padding: 14px; background: rgba(255,255,255,.48); display: flex; align-items: center; gap: 13px; }
.model-icon { width: 40px; height: 40px; border-radius: 8px; background: var(--deep); color: var(--acid); display: grid; place-items: center; font-size: 11px; font-weight: 800; }
.model-setting > div:nth-child(2) { flex: 1; }
.model-setting strong { display: block; font-size: 13px; }
.model-setting p { margin: 2px 0 0; font-size: 12px; color: var(--muted); }
.state-tag { background: #dde5d6; color: #335047; border-radius: 99px; padding: 4px 8px; font-size: 9px; font-weight: 800; letter-spacing: .08em; }
.button-row { display: flex; gap: 9px; flex-wrap: wrap; }
.secondary-button, .danger-button { border: 1px solid #c5c9c2; background: var(--white); padding: 9px 13px; font-size: 12px; }
.secondary-button:hover { border-color: #819188; }
.danger-zone { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.danger-button { color: var(--danger); border-color: #ddb8b2; }
.toast { position: fixed; z-index: 20; left: 50%; bottom: 22px; transform: translate(-50%, 20px); background: var(--deep-2); color: white; border-radius: 9px; padding: 10px 15px; font-size: 12px; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: .25s; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.mobile-only { display: none; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } }
@keyframes blink { 50% { opacity: .1; } }
@keyframes dialog-in { from { opacity: 0; transform: translateY(10px) scale(.985); } }

@media (max-width: 760px) {
  .app-shell { display: block; }
  .sidebar { position: fixed; inset: 0 auto 0 0; z-index: 12; width: min(320px, 88vw); transform: translateX(-102%); transition: transform .25s ease; box-shadow: var(--shadow); }
  .sidebar.open { transform: none; }
  .mobile-only { display: grid; place-items: center; }
  .icon-button { border: 0; background: transparent; font-size: 21px; width: 36px; height: 36px; cursor: pointer; }
  .chat-panel { height: 100dvh; }
  .topbar { min-height: 70px; padding: 12px 15px; }
  .privacy-line { display: none; }
  .messages { padding: 22px 16px 45px; }
  .composer-wrap { padding: 0 12px 10px; }
  .suggestion-grid { grid-template-columns: 1fr; }
  .suggestion { min-height: 70px; }
  .empty-state h2 { font-size: 38px; }
  .empty-copy { font-size: 13px; }
  .welcome-dialog[open] { display: block; overflow-y: auto; max-height: calc(100dvh - 24px); }
  .welcome-visual { min-height: 150px; }
  .orbit-one { width: 180px; height: 180px; }
  .orbit-two { width: 120px; height: 220px; }
  .model-cube { width: 64px; height: 64px; gap: 5px; }
  .welcome-content { padding: 31px 24px 24px; }
  .welcome-content h2 { font-size: 37px; }
  .requirements { display: none; }
  .model-pill { padding: 7px 9px; }
  .message.user .message-body { margin-left: 34px; }
}

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; } }