@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  color-scheme: dark;
  --bg: #101014;
  --sidebar: #15151b;
  --panel: #1b1b23;
  --hover: #25242e;
  --text: #f4f2fa;
  --muted: #9996a8;
  --soft: #c5c1d0;
  --border: #302e39;
  --accent: #a78bfa;
  --accent-soft: rgba(167,139,250,.13);
  --shadow: 0 20px 70px rgba(0,0,0,.3);
}

body.light {
  color-scheme: light;
  --bg: #f7f6fa;
  --sidebar: #efedf4;
  --panel: #fff;
  --hover: #f0edf6;
  --text: #211e2b;
  --muted: #777282;
  --soft: #555163;
  --border: #e3dfeb;
  --accent: #7955d9;
  --accent-soft: rgba(121,85,217,.1);
  --shadow: 0 20px 70px rgba(35,24,65,.1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans',sans-serif;
}

button, textarea, input, select { font: inherit; }
button { color: inherit; cursor: pointer; }
[hidden] { display: none !important; }

.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px;
  flex: 0 0 260px;
  display: flex;
  flex-direction: column;
  padding: 22px 15px 15px;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 8px;
  margin-bottom: 30px;
  font: 700 21px 'Space Grotesk',sans-serif;
}

.brand-icon {
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg,#d7c4ff,#9570ed);
  color: #21182f;
  font-size: 20px;
}

.purple { color: var(--accent); }

.new-chat, .primary-btn {
  width: 100%;
  padding: 12px;
  border: 0;
  border-radius: 10px;
  background: linear-gradient(110deg,#c9b5ff,#9c7be9);
  color: #21182f;
  font-weight: 700;
}

.history { margin-top: 30px; min-height: 0; }

.history-heading {
  display: flex;
  justify-content: space-between;
  padding: 0 8px 10px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
}

.text-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 10px;
}

.history-item {
  display: block;
  width: 100%;
  overflow: hidden;
  padding: 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--soft);
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 12px;
}

.history-item:hover, .history-item.active {
  background: var(--hover);
  color: var(--text);
}

.empty-history {
  padding: 0 8px;
  color: var(--muted);
  font-size: 11px;
}

.sidebar-bottom {
  display: grid;
  gap: 12px;
  margin-top: auto;
}

.upgrade, .account {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--panel);
  text-align: left;
}

.upgrade {
  background: var(--accent-soft);
  border-color: rgba(167,139,250,.25);
}

.upgrade > span:first-child {
  color: var(--accent);
  font-size: 20px;
}

.upgrade b, .upgrade small, .account b, .account small { display: block; }
.upgrade b, .account b { font-size: 11px; }

.upgrade small, .account small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 10px;
}

.upgrade-arrow { margin-left: auto; }
.account { border-color: transparent; background: transparent; }

.avatar {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #393147;
  color: #d9c9ff;
  font-weight: 700;
}

.main {
  display: flex;
  flex: 1;
  min-width: 0;
  flex-direction: column;
}

.topbar {
  height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  border-bottom: 1px solid var(--border);
}

.topbar-title { font: 600 14px 'Space Grotesk',sans-serif; }

.preview {
  margin-left: 7px;
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--muted);
  font: 700 8px 'DM Sans',sans-serif;
}

.top-actions { display: flex; align-items: center; gap: 10px; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  color: var(--soft);
  font-size: 18px;
}

.icon-btn:hover {
  border-color: var(--border);
  background: var(--hover);
}

.login-btn {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--panel);
  font-size: 11px;
  font-weight: 600;
}

.menu-btn, .mobile-close { display: none; }

.chat {
  position: relative;
  display: flex;
  flex: 1;
  min-height: 0;
  flex-direction: column;
  align-items: center;
}

.welcome {
  width: min(680px,calc(100% - 40px));
  margin: auto;
  padding: 35px 0 25px;
  text-align: center;
}

.welcome-icon {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  margin: 0 auto 20px;
  border-radius: 19px;
  background: linear-gradient(135deg,#d7c5ff,#8865d5);
  color: #21162f;
  font-size: 30px;
  box-shadow: 0 0 50px rgba(151,111,234,.2);
}

.eyebrow {
  color: var(--accent);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 2px;
}

.welcome h1 {
  margin: 13px 0 10px;
  font: 600 clamp(36px,5vw,53px)/1.08 'Space Grotesk',sans-serif;
  letter-spacing: -2px;
}

.welcome h1 span { color: var(--accent); }
.subtitle { color: var(--muted); font-size: 13px; }

.suggestions {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 10px;
  margin-top: 32px;
  text-align: left;
}

.suggestion {
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  gap: 4px 9px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  text-align: left;
}

.suggestion:hover {
  border-color: var(--accent);
  background: var(--hover);
}

.suggestion > span {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
}

.suggestion b { font-size: 11px; }
.suggestion small { color: var(--muted); font-size: 9px; }

.messages {
  display: none;
  width: min(790px,calc(100% - 40px));
  flex: 1;
  overflow-y: auto;
  padding: 32px 0 20px;
}

.messages.visible { display: block; }
.message { display: flex; gap: 13px; margin-bottom: 27px; }

.message-avatar {
  display: grid;
  place-items: center;
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.message.user .message-avatar {
  background: #393147;
  color: #d9c9ff;
}

.message-content { min-width: 0; flex: 1; padding-top: 2px; }
.message-name { margin: 0 0 8px; font-size: 11px; font-weight: 700; }

.message-text {
  color: var(--soft);
  font-size: 13px;
  line-height: 1.75;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.message-text a { color: var(--accent); }
.message-actions { display: flex; gap: 7px; margin-top: 9px; }

.message-action {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--panel);
  color: var(--muted);
  font-size: 10px;
}

.message-action:hover { color: var(--text); border-color: var(--accent); }

.code-block {
  overflow: hidden;
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: #111117;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 12px;
  border-bottom: 1px solid #302e39;
  color: #c7bfd8;
  font-size: 10px;
}

.code-header button {
  padding: 5px 8px;
  border: 1px solid #393544;
  border-radius: 6px;
  background: #22202a;
  color: #e5def2;
  font-size: 10px;
}

.code-block pre {
  overflow-x: auto;
  margin: 0;
  padding: 14px;
  color: #e7def9;
  font: 12px/1.65 Consolas,monospace;
  tab-size: 2;
}

.message-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.message-gallery img {
  max-width: min(260px,100%);
  max-height: 240px;
  border: 1px solid var(--border);
  border-radius: 11px;
  object-fit: contain;
}

.message-gallery audio { width: min(360px,100%); }

.composer-wrap {
  width: min(790px,calc(100% - 40px));
  padding: 14px 0 17px;
}

.composer {
  padding: 12px 14px 10px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.composer:focus-within { border-color: var(--accent); }

.feature-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.feature-row label, .tool-options label {
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .8px;
}

.feature-row select, .tool-options select, .tool-options input {
  max-width: 100%;
  padding: 6px 9px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--bg);
  color: var(--text);
  font-size: 10px;
}

.tool-options {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 10px 0 2px;
}

.tool-options input { width: 150px; }

.composer textarea {
  display: block;
  width: 100%;
  min-height: 36px;
  max-height: 150px;
  resize: none;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-size: 13px;
  line-height: 1.6;
  padding-top: 10px;
}

.composer textarea::placeholder { color: var(--muted); }

.composer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 9px;
}

.tools { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }

.tool-btn {
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--soft);
  font-size: 10px;
}

.tool-btn:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
}

.file-hint { color: var(--muted); font-size: 9px; }

.send-btn {
  display: grid;
  place-items: center;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #21182f;
  font-size: 21px;
  font-weight: 700;
}

.send-btn:disabled { opacity: .35; cursor: not-allowed; }

.disclaimer {
  margin: 9px 0 0;
  color: var(--muted);
  text-align: center;
  font-size: 9px;
}

.attachments {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 5px 0 10px;
}

.attachment {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  max-width: 190px;
  padding: 6px 24px 6px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--soft);
  font-size: 10px;
}

.attachment img {
  width: 35px;
  height: 35px;
  border-radius: 5px;
  object-fit: cover;
}

.attachment span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.attachment button {
  position: absolute;
  top: 2px;
  right: 3px;
  width: 18px;
  height: 18px;
  border: 0;
  border-radius: 50%;
  background: var(--hover);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(0,0,0,.58);
  backdrop-filter: blur(8px);
}

.modal {
  position: relative;
  width: min(390px,100%);
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
  text-align: center;
}

.modal-close { position: absolute; top: 10px; right: 10px; }

.modal-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin: 0 auto 15px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 24px;
}

.modal h2 { margin: 0 0 10px; font: 600 22px 'Space Grotesk',sans-serif; }
.modal p { color: var(--soft); font-size: 12px; line-height: 1.7; }
.modal-note { color: var(--muted)!important; font-size: 10px!important; }
.modal .primary-btn { margin-top: 15px; }

.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  z-index: 20;
  transform: translate(-50%,15px);
  padding: 10px 15px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: .2s;
  font-size: 11px;
}

.toast.show { transform: translate(-50%,0); opacity: 1; }

@media(max-width:760px) {
  .sidebar {
    position: fixed;
    z-index: 8;
    inset: 0 auto 0 0;
    transform: translateX(-105%);
    transition: transform .22s;
    box-shadow: var(--shadow);
  }

  .sidebar.open { transform: translateX(0); }
  .menu-btn, .mobile-close { display: grid; }
  .topbar { height: 60px; padding: 0 14px; }
  .composer-wrap, .messages { width: calc(100% - 26px); }
}

@media(max-width:430px) {
  .welcome h1 { font-size: 38px; }
  .suggestions { gap: 7px; }
  .suggestion { padding: 10px 8px; }
  .suggestion b { font-size: 10px; }
  .suggestion small { font-size: 8px; }
  .feature-row { align-items: flex-start; flex-direction: column; gap: 5px; }
  .feature-row select { width: 100%; }
}