:root {
  --bg-0: #f8f6ef;
  --bg-1: #f0ebdd;
  --panel: rgba(255, 255, 255, 0.78);
  --ink: #1f2a35;
  --accent: #0f766e;
  --accent-2: #f97316;
  --danger: #b42318;
  --border: rgba(31, 42, 53, 0.15);
  --shadow: 0 20px 60px rgba(23, 30, 38, 0.15);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 20% 15%, #fff7df 0%, transparent 28%),
    radial-gradient(circle at 88% 25%, #d5f5ef 0%, transparent 32%),
    linear-gradient(130deg, var(--bg-0), var(--bg-1));
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(0, 0, 0, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, black 30%, transparent 85%);
  pointer-events: none;
}

.app-shell {
  width: min(1000px, 94vw);
  margin: 36px auto;
  display: grid;
  gap: 20px;
}

.hero {
  animation: rise 550ms ease-out;
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  margin: 0;
  color: #6a7280;
}

h1 {
  margin: 8px 0 10px;
  line-height: 1.05;
  font-size: clamp(2rem, 4.8vw, 3.4rem);
}

.subtitle {
  margin: 0;
  color: #52606d;
}

.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  backdrop-filter: blur(8px);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 22px;
  animation: rise 700ms ease both;
}

.auth-switch {
  display: inline-flex;
  gap: 8px;
  margin-bottom: 14px;
}

.auth-switch .tab {
  min-width: 120px;
}

.auth-switch .tab.active {
  background: linear-gradient(135deg, var(--accent), #0b9f93);
  color: #fff;
  border: none;
}

.auth-form h2 {
  margin: 0 0 4px;
}

.hidden {
  display: none;
}

form {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 8px;
  font-size: 0.95rem;
}

input,
button {
  font: inherit;
}

input {
  border: 1px solid #cad2dc;
  border-radius: 12px;
  padding: 10px 12px;
  outline: none;
  background: #ffffff;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.16);
}

button {
  border: none;
  border-radius: 12px;
  padding: 10px 14px;
  background: linear-gradient(135deg, var(--accent), #0b9f93);
  color: white;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.03);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  filter: none;
}

button.ghost {
  background: #ffffff;
  color: var(--ink);
  border: 1px solid #c9d2dc;
}

.hint {
  color: #596674;
  margin: 8px 0 0;
  font-size: 0.9rem;
}

.status {
  margin-top: 10px;
  min-height: 1.2rem;
  font-size: 0.92rem;
  color: #213243;
}

.status.subtle {
  margin-top: 6px;
  font-size: 0.84rem;
  color: #627182;
}

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

.chat-top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.chat-top h2,
.login-panel h2 {
  margin: 0;
}

.history-bar {
  margin-top: 8px;
}

.room-form {
  grid-template-columns: 1fr 1fr auto;
  align-items: end;
}

.messages {
  margin-top: 14px;
  border: 1px solid #d3dbe4;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.75);
  height: 44vh;
  min-height: 300px;
  overflow: auto;
  padding: 12px;
  display: grid;
  gap: 10px;
}

.msg {
  max-width: min(84%, 720px);
  border-radius: 14px;
  padding: 10px 12px;
  line-height: 1.35;
  animation: pop 250ms ease-out;
}

.msg-body {
  display: grid;
  gap: 8px;
}

.msg-body.image img {
  display: block;
  max-width: min(56vw, 320px);
  max-height: 320px;
  object-fit: contain;
  border-radius: 10px;
  border: 1px solid rgba(30, 40, 50, 0.2);
  background: #ffffff;
}

.msg-caption {
  font-size: 0.78rem;
  opacity: 0.78;
}

.msg .meta {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  margin-bottom: 4px;
  opacity: 0.75;
}

.msg.self {
  justify-self: end;
  background: #d7f6f2;
  border: 1px solid #8addd4;
}

.msg.other {
  justify-self: start;
  background: #fff3e8;
  border: 1px solid #ffd3ae;
}

.msg.system {
  justify-self: center;
  background: #eef2f7;
  border: 1px solid #d6dde6;
  color: #495463;
}

.message-form {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.message-compose {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 8px;
}

.tool-btn {
  padding: 8px 10px;
  min-width: 42px;
}

.emoji-panel {
  margin-top: 10px;
  padding: 10px;
  border: 1px solid #d3dbe4;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.emoji-btn {
  border: 1px solid #d3dbe4;
  border-radius: 10px;
  background: #fff;
  min-width: 38px;
  min-height: 38px;
  padding: 0;
  font-size: 1.1rem;
  cursor: pointer;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pop {
  from {
    opacity: 0;
    transform: translateY(6px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 880px) {
  .room-form {
    grid-template-columns: 1fr;
  }

  .messages {
    height: 48vh;
  }

  .message-form {
    grid-template-columns: 1fr;
  }
}