/* McKnX Phase IV.1 — First Impression Product */
:root {
  --mx-bg: #06080d;
  --mx-surface: #0c1018;
  --mx-elevated: #121824;
  --mx-border: rgba(255, 255, 255, 0.07);
  --mx-text: #f0f3f8;
  --mx-muted: #8a94a6;
  --mx-accent: #5b9fd4;
  --mx-accent-soft: rgba(91, 159, 212, 0.12);
  --mx-glow: rgba(91, 159, 212, 0.35);
  --mx-font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --mx-radius: 16px;
  --mx-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background: var(--mx-bg);
  color: var(--mx-text);
  font-family: var(--mx-font);
  -webkit-font-smoothing: antialiased;
}

body.mcknx-launch { overflow: hidden; }

.mcknx-app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transition: opacity 0.6s var(--mx-ease);
}
body.mcknx-ready .mcknx-app { opacity: 1; }

/* Launch */
.mcknx-launch-screen {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--mx-bg);
  transition: opacity 0.5s var(--mx-ease), visibility 0.5s;
}
body.mcknx-ready .mcknx-launch-screen {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.mcknx-launch-wordmark {
  font-size: clamp(2.5rem, 8vw, 3.5rem);
  font-weight: 300;
  letter-spacing: 0.35em;
  text-indent: 0.35em;
  color: var(--mx-text);
  animation: mx-breathe 2s var(--mx-ease) infinite;
}
@keyframes mx-breathe {
  0%, 100% { opacity: 0.7; transform: scale(0.98); }
  50% { opacity: 1; transform: scale(1); }
}

/* Header — minimal */
.mcknx-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid transparent;
}
.mcknx-logo {
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--mx-text);
  text-decoration: none;
}
.mcknx-logo span { color: var(--mx-muted); font-weight: 400; font-size: 0.85rem; margin-left: 0.5rem; letter-spacing: 0; }

/* Main */
.mcknx-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
}

.mcknx-hero-line {
  text-align: center;
  font-size: clamp(1.25rem, 3.5vw, 1.65rem);
  font-weight: 400;
  line-height: 1.45;
  color: var(--mx-muted);
  margin: 0 0 2.5rem;
  animation: mx-rise 0.8s var(--mx-ease) 0.2s both;
}
@keyframes mx-rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Conversation */
.mcknx-conversation {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  animation: mx-rise 0.8s var(--mx-ease) 0.35s both;
}

.mcknx-messages {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 0;
}

.mcknx-msg {
  max-width: 92%;
  padding: 1rem 1.15rem;
  border-radius: var(--mx-radius);
  line-height: 1.55;
  font-size: 0.95rem;
  white-space: pre-wrap;
  animation: mx-msg-in 0.45s var(--mx-ease);
}
@keyframes mx-msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.mcknx-msg-user {
  align-self: flex-end;
  background: var(--mx-elevated);
  border: 1px solid var(--mx-border);
  color: var(--mx-text);
}
.mcknx-msg-mcknx {
  align-self: flex-start;
  background: var(--mx-surface);
  border: 1px solid var(--mx-border);
  color: var(--mx-text);
}

.mcknx-typing {
  align-self: flex-start;
  display: flex;
  gap: 4px;
  padding: 1rem 1.25rem;
  background: var(--mx-surface);
  border-radius: var(--mx-radius);
  border: 1px solid var(--mx-border);
}
.mcknx-typing span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--mx-muted);
  animation: mx-dot 1.2s infinite;
}
.mcknx-typing span:nth-child(2) { animation-delay: 0.15s; }
.mcknx-typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes mx-dot {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-3px); }
}

/* Delight chip */
.mcknx-delight {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--mx-accent-soft);
  border: 1px solid rgba(91, 159, 212, 0.25);
  border-radius: 12px;
  font-size: 0.82rem;
  animation: mx-delight 0.6s var(--mx-ease);
}
@keyframes mx-delight {
  0% { opacity: 0; transform: scale(0.96); }
  60% { transform: scale(1.02); }
  100% { opacity: 1; transform: scale(1); }
}
.mcknx-delight-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--mx-accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; color: #fff; flex-shrink: 0;
}
.mcknx-delight strong { display: block; color: var(--mx-text); }
.mcknx-delight small { color: var(--mx-muted); }

/* Follow-ups */
.mcknx-followups {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.mcknx-chip {
  background: transparent;
  border: 1px solid var(--mx-border);
  color: var(--mx-muted);
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
  font-family: inherit;
}
.mcknx-chip:hover {
  border-color: var(--mx-accent);
  color: var(--mx-text);
  background: var(--mx-accent-soft);
}

/* Input */
.mcknx-input-wrap {
  width: 100%;
  position: relative;
  margin-top: 0.5rem;
}
.mcknx-input {
  width: 100%;
  padding: 1rem 3.25rem 1rem 1.15rem;
  border-radius: var(--mx-radius);
  border: 1px solid var(--mx-border);
  background: var(--mx-surface);
  color: var(--mx-text);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.mcknx-input:focus {
  border-color: rgba(91, 159, 212, 0.5);
  box-shadow: 0 0 0 3px var(--mx-accent-soft);
}
.mcknx-input::placeholder { color: var(--mx-muted); }
.mcknx-send {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  width: 2.25rem; height: 2.25rem;
  border: none;
  border-radius: 10px;
  background: var(--mx-accent);
  color: #fff;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.2s, transform 0.15s;
}
.mcknx-send:hover { opacity: 0.9; transform: translateY(-50%) scale(1.04); }
.mcknx-send:disabled { opacity: 0.35; cursor: not-allowed; }

.mcknx-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.mcknx-footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.72rem;
  color: var(--mx-muted);
  opacity: 0.6;
}

@media (max-width: 480px) {
  .mcknx-header { padding: 1rem; }
  .mcknx-main { padding: 1rem; justify-content: flex-start; padding-top: 2rem; }
}