:root {
  --primary: #5B8DEF;
  --secondary: #6C9A8B;
  --accent: #E8998D;
  --bg: #F7F9FB;
  --surface: #FFFFFF;
  --text: #1F2A37;
  --muted: #64748B;
  --border: #E2E8F0;
  --shadow: 0 4px 16px rgba(31, 42, 55, 0.08);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text);
  font-size: 17px; line-height: 1.5;
  overscroll-behavior: none;
}

.view { display: none; min-height: 100vh; padding: 16px; padding-bottom: 32px; }
.view.active { display: block; }

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px; min-height: 44px;
}

.login-box {
  max-width: 380px; margin: 15vh auto 0;
  background: var(--surface); padding: 32px 24px;
  border-radius: 20px; box-shadow: var(--shadow);
  text-align: center;
}
.login-box h1 { margin: 0 0 4px; color: var(--primary); font-size: 28px; }
.login-box .subtitle { margin: 0 0 24px; color: var(--muted); font-size: 15px; }
.login-box input {
  width: 100%; padding: 14px 16px; margin-bottom: 12px;
  border: 1px solid var(--border); border-radius: 12px;
  font-size: 16px; background: #fff;
}
.login-box input:focus { outline: 2px solid var(--primary); border-color: transparent; }

.btn-primary {
  width: 100%; padding: 14px; border: none; border-radius: 12px;
  background: var(--primary); color: #fff; font-size: 17px; font-weight: 600;
  cursor: pointer; transition: transform 0.1s;
}
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
  padding: 12px 20px; border: 1px solid var(--border); border-radius: 12px;
  background: #fff; color: var(--text); font-size: 16px; cursor: pointer;
}

.btn-ghost {
  padding: 8px 12px; border: none; background: transparent;
  color: var(--primary); font-size: 16px; cursor: pointer;
}

.error { color: #c0392b; font-size: 14px; margin-top: 8px; }
.hidden { display: none; }

.hero { text-align: center; margin: 24px 0 32px; }
.dog {
  width: 180px; height: 180px; border-radius: 50%;
  object-fit: cover; box-shadow: var(--shadow);
  background: #e5e9f0;
  transition: opacity 0.4s ease;
}
.hero-text {
  margin: 16px 0 0; color: var(--muted);
  font-size: 17px; font-style: italic;
}

.btn-sos {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; width: 100%; padding: 24px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; border: none; border-radius: 20px;
  font-size: 22px; font-weight: 700; cursor: pointer;
  box-shadow: 0 8px 24px rgba(91, 141, 239, 0.35);
  margin-bottom: 24px;
  transition: transform 0.15s;
}
.btn-sos:active { transform: scale(0.97); }
.sos-icon { font-size: 28px; }

.grid-actions {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.card-action {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 20px 12px;
  display: flex; flex-direction: column; align-items: center;
  gap: 8px; font-size: 15px; color: var(--text); cursor: pointer;
  transition: transform 0.1s;
}
.card-action:active { transform: scale(0.97); }
.card-action .emoji { font-size: 28px; }

.stats {
  text-align: center; color: var(--muted); font-size: 13px;
  margin-top: 24px;
}

.sos-hero { text-align: center; margin: 24px 0; }
.sos-dog { width: 160px; height: 160px; }
.sos-title { color: var(--primary); margin: 16px 0 4px; font-size: 26px; }
.sos-sub { color: var(--muted); margin: 0 0 24px; font-style: italic; }
.sos-steps { display: flex; flex-direction: column; gap: 12px; }
.step-btn {
  padding: 20px; border: 2px solid var(--primary); border-radius: 16px;
  background: #fff; color: var(--primary);
  font-size: 17px; font-weight: 600; text-align: left; cursor: pointer;
}
.step-btn.secondary { border-color: var(--border); color: var(--text); }

.breath-wrap {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; min-height: 60vh; gap: 24px;
}
.breath-circle {
  width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle, var(--primary), var(--secondary));
  transform: scale(0.7);
  transition: transform 4s ease-in-out;
  box-shadow: 0 12px 40px rgba(91, 141, 239, 0.35);
}
.breath-circle.inhale { transform: scale(1); transition-duration: 4s; }
.breath-circle.exhale { transform: scale(0.7); transition-duration: 6s; }
.breath-label { font-size: 24px; font-weight: 600; color: var(--primary); }
.breath-count { color: var(--muted); font-size: 15px; }
.hint { text-align: center; color: var(--muted); font-size: 14px; margin: 8px 0 24px; }

.grounding-wrap h2 { color: var(--primary); margin-top: 8px; }
.g-inputs { display: flex; flex-direction: column; gap: 10px; margin: 20px 0; }
.g-inputs input {
  padding: 14px; border: 1px solid var(--border); border-radius: 12px;
  font-size: 16px; background: #fff;
}
.g-inputs input:focus { outline: 2px solid var(--primary); border-color: transparent; }

.reassure-wrap {
  display: flex; flex-direction: column; justify-content: center;
  align-items: center; min-height: 70vh; gap: 32px; padding: 16px;
}
.reassure-text {
  font-size: 22px; line-height: 1.6; text-align: center;
  color: var(--text); font-weight: 500; max-width: 500px;
}
.reassure-nav { display: flex; gap: 24px; align-items: center; }

.diary-wrap form { display: flex; flex-direction: column; gap: 14px; margin-bottom: 32px; }
.diary-wrap label {
  display: flex; flex-direction: column; gap: 6px;
  font-size: 15px; color: var(--muted);
}
.diary-wrap input[type="range"] { width: 100%; }
.diary-wrap input[type="number"],
.diary-wrap textarea {
  padding: 12px; border: 1px solid var(--border); border-radius: 12px;
  font-size: 16px; font-family: inherit; background: #fff;
}
.diary-list { display: flex; flex-direction: column; gap: 10px; }
.diary-item {
  background: var(--surface); border-radius: 12px; padding: 14px;
  border-left: 4px solid var(--primary); font-size: 14px;
}
.diary-item .meta { color: var(--muted); font-size: 12px; margin-bottom: 6px; }