:root {
  --warm-bg: #fdf6ec;
  --warm-text: #5a3e2b;
  --accent: #e89a55;
  --accent-hover: #d08040;
  --input-bg: #fff9f2;
  --border: #e2cdb4;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  height: 100dvh;
  overflow: hidden;
  font-family: 'Georgia', 'Times New Roman', serif;
  background: radial-gradient(ellipse at 60% 40%, #fef3e2 0%, #fdf0e8 45%, #f9e8d8 100%);
  color: var(--warm-text);
}

/* ── layout ── */

.happiness-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

.messages-area {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* ── floating message animation ── */

@keyframes floatDrift {
  0% {
    opacity: 0;
    transform: translateY(0) translateX(0) scale(0.85);
  }
  8% {
    opacity: 1;
    transform: translateY(-18px) translateX(calc(var(--drift, 0px) * 0.08)) scale(1);
  }
  80% {
    opacity: 0.75;
  }
  100% {
    opacity: 0;
    transform: translateY(-180px) translateX(var(--drift, 0px)) scale(0.92);
  }
}

.floating-message {
  position: absolute;
  padding: 9px 18px;
  border-radius: 22px;
  border: 1.5px solid;
  font-size: 0.97rem;
  line-height: 1.45;
  max-width: 220px;
  word-wrap: break-word;
  color: #5a3e2b;
  box-shadow: 0 6px 24px rgba(180, 110, 50, 0.12), 0 1px 4px rgba(0,0,0,0.06);
  animation: floatDrift ease-out forwards;
  pointer-events: none;
  will-change: transform, opacity;
}

/* ── input area ── */

.input-area {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 28px 32px max(36px, env(safe-area-inset-bottom));
  background: linear-gradient(to top, rgba(253, 246, 236, 0.97) 60%, transparent);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.app-title {
  font-size: 1.55rem;
  font-weight: normal;
  letter-spacing: 0.04em;
  color: #8c5e3a;
  text-shadow: 0 1px 2px rgba(255,255,255,0.6);
}

.input-row {
  display: flex;
  gap: 10px;
  width: 100%;
  max-width: 540px;
}

.message-input {
  flex: 1;
  padding: 13px 20px;
  border: 1.5px solid var(--border);
  border-radius: 28px;
  background: var(--input-bg);
  font-size: 1rem;
  font-family: inherit;
  color: var(--warm-text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(200, 140, 80, 0.08);
}

.message-input:focus {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(232, 154, 85, 0.22);
}

.message-input::placeholder {
  color: #c4a882;
}

.send-button {
  padding: 13px 26px;
  border: none;
  border-radius: 28px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-family: inherit;
  font-weight: bold;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
  box-shadow: 0 3px 12px rgba(232, 154, 85, 0.35);
  white-space: nowrap;
}

.send-button:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 4px 16px rgba(208, 128, 64, 0.45);
}

.send-button:active:not(:disabled) {
  transform: scale(0.96);
}

.send-button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}