:root {
  --bg: #f4efe8;
  --panel: #fffdf9;
  --panel-2: #f9f5ee;
  --line: #ddd2c3;
  --text: #1c1712;
  --muted: #6a5d52;
  --brand: #0f766e;
  --brand-dark: #0b4f4a;
  --bubble-in: #ebe4da;
  --bubble-out: #d4f6e2;
  --shadow: 0 24px 60px rgba(29, 22, 17, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.18), transparent 30%),
    radial-gradient(circle at bottom right, rgba(217, 119, 6, 0.16), transparent 25%),
    var(--bg);
}

.shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 360px 1fr;
}

.sidebar,
.chat {
  padding: 24px;
}

.sidebar {
  background: rgba(255, 253, 249, 0.92);
  border-right: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand,
.chat-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.eyebrow {
  margin: 0 0 6px;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

h1,
h2,
h3,
p {
  margin: 0;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 700;
}

.field {
  display: grid;
  gap: 8px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}

.field input,
#messageInput {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  background: #fff;
  color: var(--text);
  outline: none;
}

.field input:focus,
#messageInput:focus {
  border-color: var(--brand);
}

.contact-list {
  margin-top: 20px;
  display: grid;
  gap: 10px;
  max-height: calc(100vh - 220px);
  overflow: auto;
}

.contact-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  background: var(--panel);
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.contact-card:hover,
.contact-card.active {
  transform: translateY(-1px);
  border-color: var(--brand);
}

.contact-card strong,
.message-card strong {
  display: block;
  margin-bottom: 4px;
}

.contact-card small,
.message-card small,
.meta {
  color: var(--muted);
}

.chat {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 18px;
}

.ghost-btn,
.send-btn,
.upload-btn,
.emoji-btn {
  border: 0;
  border-radius: 999px;
  padding: 12px 16px;
  font-weight: 700;
  cursor: pointer;
}

.ghost-btn {
  background: var(--panel);
  border: 1px solid var(--line);
}

.message-list {
  background: rgba(255, 253, 249, 0.85);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 22px;
  overflow: auto;
  box-shadow: var(--shadow);
}

.empty-state {
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--muted);
}

.message-row {
  display: flex;
  margin-bottom: 14px;
}

.message-row.inbound {
  justify-content: flex-start;
}

.message-row.outbound {
  justify-content: flex-end;
}

.message-card {
  max-width: min(640px, 85%);
  border-radius: 22px;
  padding: 14px 16px;
  background: var(--bubble-in);
  box-shadow: 0 10px 24px rgba(29, 22, 17, 0.06);
}

.message-row.outbound .message-card {
  background: var(--bubble-out);
}

.composer {
  background: rgba(255, 253, 249, 0.95);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 16px;
  display: grid;
  gap: 12px;
}

.emoji-row,
.composer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.emoji-btn {
  background: var(--panel-2);
}

.upload-btn,
.send-btn {
  background: var(--brand);
  color: #fff;
}

.upload-btn {
  display: inline-flex;
}

#fileInput {
  display: none;
}

.send-btn {
  margin-left: auto;
}

.toast {
  position: fixed;
  right: 22px;
  top: 22px;
  background: var(--brand-dark);
  color: #fff;
  padding: 12px 16px;
  border-radius: 14px;
  box-shadow: var(--shadow);
}

@media (max-width: 980px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .contact-list {
    max-height: 240px;
  }
}