:root {
  --bg: #0f1115;
  --panel: #1a1d24;
  --fg: #e8e9ee;
  --muted: #9aa0ad;
  --accent: #4ade80;
  --danger: #f87171;
  --border: #2a2e38;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: contain;
}

main {
  max-width: 480px;
  margin: 0 auto;
  padding:
    calc(1.25rem + env(safe-area-inset-top))
    calc(1rem + env(safe-area-inset-right))
    calc(2rem + env(safe-area-inset-bottom))
    calc(1rem + env(safe-area-inset-left));
}

header { text-align: center; margin-bottom: 1.5rem; }

h1 { margin: 0; font-size: 1.4rem; letter-spacing: 0.02em; }
.task-name { margin: 0.25rem 0 0; color: var(--muted); }

section { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1.25rem; }

#login-form { display: flex; flex-direction: column; gap: 0.75rem; }
label { font-size: 0.9rem; color: var(--muted); }
input[type="password"] {
  background: #0f1115; color: var(--fg); border: 1px solid var(--border);
  border-radius: 8px; padding: 0.75rem; font-size: 1rem;
}

button {
  background: var(--panel); color: var(--fg); border: 1px solid var(--border);
  border-radius: 10px; padding: 0.85rem 1rem; font-size: 1rem; cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
button:active { transform: scale(0.99); }

.chart-wrap { aspect-ratio: 1 / 1; max-width: 280px; margin: 0 auto 1rem; }
.stats-text { text-align: center; font-size: 1.05rem; margin: 0 0 1.25rem; }

.range-buttons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.5rem; margin-bottom: 1.25rem; }
.range-buttons button.active { border-color: var(--accent); color: var(--accent); }

.filter-row { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.75rem; }
.filter-row label { color: var(--muted); font-size: 0.9rem; }
.filter-row select {
  flex: 1;
  background: #0f1115; color: var(--fg); border: 1px solid var(--border);
  border-radius: 8px; padding: 0.6rem 2rem 0.6rem 0.75rem; font-size: 1rem;
  -webkit-appearance: none; -moz-appearance: none; appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'><path fill='none' stroke='%239aa0ad' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' d='M1 1.5l5 5 5-5'/></svg>");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 12px 8px;
}
.filter-row select:focus { outline: none; border-color: var(--accent); }

.activity-row { padding: 1rem 0; border-top: 1px solid var(--border); }
.activity-row:first-child { border-top: none; padding-top: 0; }
.activity-title { margin: 0 0 0.5rem; font-size: 1rem; color: var(--muted); font-weight: 500; }

#main-view hr {
  border: 0;
  height: 1px;
  background: var(--border);
  margin: 0.5rem 0 1.25rem;
}

.action-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.primary { background: var(--accent); color: #0f1115; border-color: var(--accent); font-weight: 600; }
.secondary { background: transparent; border-color: var(--danger); color: var(--danger); font-weight: 600; }

.today-state { text-align: center; color: var(--muted); margin: 0.75rem 0 0; min-height: 1.2em; }
.error { color: var(--danger); margin: 0; font-size: 0.9rem; }