body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', system-ui, sans-serif;
  background: #fff;
  color: #222;
  min-height: 100vh;
}
.landing {
  position: relative;
  width: 100vw;
  height: 100vh;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #fff;
}
.circles-bg {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0; left: 0;
  z-index: 0;
  pointer-events: none;
}
.landing-content {
  position: relative;
  z-index: 1;
  text-align: center;
  margin-bottom: 18vh;
  width: 100%;
  padding: 0 1.5rem;
}
h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.accent {
  color: #1ecb6b;
}
.tagline {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: #444;
}
.primary-btn {
  background: #0e8c3a;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.9em 2.2em;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 16px rgba(14,140,58,0.12);
}
.primary-btn:hover {
  background: #065c22;
  box-shadow: 0 6px 24px rgba(14,140,58,0.18);
}
.app {
  width: 100vw;
  min-height: 100vh;
  margin: 0;
  padding: 2rem 0.5rem 3rem 0.5rem;
  display: block;
  background: #fff;
  border-radius: 0;
  box-shadow: none;
  position: relative;
}
.main-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0.2rem 1rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 1rem;
  min-height: 20vh;
}
.snr-bar-container {
  margin: 0 auto 1rem auto;
  width: 100%;
  margin-top: 0.3rem;
}
.snr-bar {
  display: flex;
  align-items: center;
  height: 56px;
  border-radius: 32px;
  overflow: hidden;
  box-shadow: 0 1px 8px rgba(30,144,203,0.04);
  font-size: 1.18rem;
  font-weight: 600;
  background: #f5f7fa;
  padding: 0 2rem;
  justify-content: space-between;
}
.snr-signal, .snr-noise {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  transition: width 0.4s;
  white-space: nowrap;
  letter-spacing: 0.5px;
}
.snr-signal {
  background: linear-gradient(90deg, #1ecb6b 80%, #1976d2 100%);
  color: #fff;
  border-radius: 32px 0 0 32px;
}
.snr-noise {
  background: #1976d2;
  color: #fff;
  border-radius: 0 32px 32px 0;
}
.snr-bar span {
  margin-left: 0.5em;
  font-weight: 400;
  font-size: 1rem;
  opacity: 0.85;
}
.task-form {
  display: flex;
  gap: 0.7rem;
  margin: 0 auto 1rem auto;
  width: 100%;
  max-width: 600px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(30,144,203,0.08);
  padding: 1rem 1.2rem;
  align-items: center;
  justify-content: center;
}
.task-input {
  flex: 1 1 0;
  background: #f5f7fa;
  border: 1.5px solid #b0b8c1;
  border-radius: 6px;
  padding: 0.8em 1em;
  font-size: 1.1rem;
  outline: none;
  transition: border 0.2s;
}
.task-input:focus {
  border-color: #1ecb6b;
}
.add-task-btn {
  background: #1ecb6b;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.8em 1.5em;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.add-task-btn:hover {
  background: #1976d2;
}
.task-list {
  width: 100%;
  box-sizing: border-box;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  padding: 0;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  box-shadow: none;
}
.task-list:empty::after {
  content: 'No tasks';
  color: #bbb;
  font-size: 1.1rem;
  text-align: center;
  padding: 1.5rem 0;
  display: block;
}
.task-item {
  width: 100%;
  box-sizing: border-box;
  background: #fff;
  border: 1.5px solid #e0e7ef;
  padding: 0.7em 1em;
  border-radius: 10px;
  font-size: 1.13rem;
  box-shadow: 0 1px 6px rgba(30,144,203,0.04);
  color: #222;
  transition: box-shadow 0.2s, opacity 0.2s, background-color 0.2s;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8em;
  min-height: 48px;
  word-wrap: break-word;
  cursor: grab;
}
.task-item:active {
  cursor: grabbing;
}
.task-item span {
  flex: 1 1 auto;
  min-width: 0;
  word-break: break-word;
  font-size: 1.08em;
  line-height: 1.3;
}
.task-actions {
  display: flex;
  align-items: center;
  gap: 0.3em;
  height: 100%;
  flex-shrink: 0;
}
.task-item:last-child {
  margin-bottom: 0;
}
.task-item.completed span {
  text-decoration: line-through;
  color: #aaa;
  opacity: 0.7;
}
.task-action-btn {
  margin-left: 0.7em;
  background: none;
  border: none;
  font-size: 1.15em;
  cursor: pointer;
  vertical-align: middle;
  color: #1e90cb;
  transition: color 0.2s;
}
.task-action-btn.complete-btn {
  color: #1ecb6b;
}
.task-action-btn.complete-btn:hover {
  color: #0e8c3a;
}
.task-action-btn.delete-btn {
  color: #ff6d1b;
}
.task-action-btn.delete-btn:hover {
  color: #b82e00;
}
.lists-container {
  display: flex;
  gap: 1rem;
  justify-content: center;
  align-items: flex-start;
  width: 100%;
  max-width: 1300px;
  margin: 0 auto;
  padding: 0.5rem 0;
  flex-wrap: nowrap;
}
.signal-list-section, .noise-list-section {
  flex: 1 1 0;
  min-width: 300px;
  max-width: 600px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.signal-list-section h3, .noise-list-section h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1rem;
}
.signal-prompt {
  background: #fff;
  border: 2px solid #1ecb6b;
  border-radius: 12px;
  padding: 1.2em 1.5em;
  max-width: 420px;
  margin: 2.5rem auto 0 auto;
  text-align: center;
  font-size: 1.13rem;
  color: #1ecb6b;
  box-shadow: 0 2px 12px rgba(30,203,107,0.08);
  display: none;
}
.signal-prompt button {
  margin-top: 1.2em;
  background: #1ecb6b;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.7em 1.5em;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.signal-prompt button:disabled {
  background: #b2e9c9;
  cursor: not-allowed;
}
.signal-checkbox {
  margin-right: 0.8em;
  accent-color: #1ecb6b;
  width: 1.1em;
  height: 1.1em;
}
.signal-list-section {
  background: #f3fcf7;
  border-radius: 14px;
  padding: 1.2rem 0.5rem 1.5rem 0.5rem;
  transition: background 0.2s;
  box-sizing: border-box;
}
.noise-list-section {
  background: #f5f8fc;
  border-radius: 14px;
  padding: 1.2rem 1rem 1.5rem 1rem;
  transition: background 0.2s;
}
.about-btn {
  position: static;
  margin-right: 30px;
  top: unset;
  right: unset;
  box-shadow: 0 2px 8px rgba(14,140,58,0.10);
  background: #0e8c3a;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.5em 1.2em;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  outline: none;
}
.about-btn:hover {
  background: #065c22;
  color: #fff;
  box-shadow: 0 4px 16px rgba(14,140,58,0.16);
}
.about-modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.12);
  z-index: 1003;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-content {
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 8px 40px rgba(30,144,203,0.13);
  padding: 2.5rem 2.2rem 2rem 2.2rem;
  max-width: 420px;
  width: 95vw;
  position: relative;
  text-align: left;
  color: #222;
}
.close-about {
  position: absolute;
  top: 18px;
  right: 18px;
  background: none;
  border: none;
  font-size: 1.7rem;
  color: #888;
  cursor: pointer;
  transition: color 0.2s;
}
.close-about:hover {
  color: #1ecb6b;
}
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 64px;
  background: #fff;
  box-shadow: 0 2px 12px rgba(30,144,203,0.06);
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px 0 38px;
}
.logo {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -1px;
  color: #222;
  display: flex;
  align-items: center;
  gap: 0.2em;
  user-select: none;
}
body, .app {
  padding-top: 35px;
}
@media (max-width: 900px) {
  .main-content {
    max-width: 100%;
    padding: 0.1rem 0.2rem 0.5rem 0.2rem;
    gap: 0.8rem;
  }
  .snr-bar-container {
    margin: 0 auto 0.8rem auto;
    margin-top: 0.2rem;
  }
  .task-form {
    margin: 0 auto 0.8rem auto;
  }
  .lists-container {
    gap: 0.8rem;
    padding: 0.5rem 0;
  }
  .signal-list-section, .noise-list-section {
    min-width: 240px;
  }
  .signal-list-section h3, .noise-list-section h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
  }
  .task-form {
    flex-direction: column;
    gap: 0.7rem;
    max-width: 98vw;
    padding: 1rem 0.5rem;
  }
  .snr-bar {
    padding: 0 0.5rem;
    font-size: 1rem;
    height: 48px;
  }
  .task-list {
    min-height: 100px;
  }
  .task-item {
    padding: 0.6em 0.8em;
    gap: 0.6em;
    font-size: 1.05rem;
  }
  .task-item span {
    font-size: 1.05em;
  }
  .task-action-btn {
    margin-left: 0.5em;
    font-size: 1.1em;
  }
}
@media (max-width: 700px) {
  .main-header {
    padding: 0 10px 0 10px;
    height: 54px;
  }
  .logo {
    font-size: 1.05rem;
  }
  body, .app {
    padding-top: 54px;
  }
}
@media (max-width: 600px) {
  .landing-content {
    margin-bottom: 24vh;
    padding: 0 0.5rem;
  }
  .landing h1 {
    font-size: 2rem;
  }
  .primary-btn {
    font-size: 1rem;
    padding: 0.8em 1.6em;
  }
  .lists-container {
    gap: 0.5rem;
    padding: 0.3rem 0;
  }
  .signal-list-section, .noise-list-section {
    min-width: 200px;
  }
  .signal-list-section h3, .noise-list-section h3 {
    font-size: 1.1rem;
    margin-bottom: 0.6rem;
  }
  .task-form {
    padding: 0.8rem 0.3rem;
  }
  .snr-bar {
    font-size: 0.9rem;
    height: 44px;
  }
  .task-list {
    min-height: 80px;
  }
  .task-item {
    padding: 0.5em 0.7em;
    gap: 0.5em;
    font-size: 1rem;
    min-height: 44px;
  }
  .task-item span {
    font-size: 1em;
  }
  .task-action-btn {
    margin-left: 0.4em;
    font-size: 1.05em;
  }
}