:root {
  --color-surface: #faf8ff;
  --color-surface-dim: #d2d9f4;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container: #eaedff;
  --color-on-surface: #131b2e;
  --color-on-surface-variant: #5c3f40;
  
  --color-primary: #b80035;
  --color-on-primary: #ffffff;
  --color-primary-container: #e11d48;
  --color-on-primary-container: #fffaf9;
  
  --color-secondary: #505f76;
  --color-on-secondary: #ffffff;
  --color-tertiary: #62595a;
  
  --color-outline: #906f70;
  --color-outline-variant: #e5bdbe;
  
  --color-background: #faf8ff;
  --color-on-background: #131b2e;
  
  --font-family: 'Plus Jakarta Sans', sans-serif;
  
  --rounded-sm: 0.25rem;
  --rounded-base: 0.5rem;
  --rounded-md: 0.75rem;
  --rounded-lg: 1rem;
  --rounded-xl: 1.5rem;
  --rounded-full: 9999px;
  
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.05);
  --shadow-overlay: 0 8px 24px rgba(0,0,0,0.1);
  
  --spacing-mobile: 16px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-background);
  color: var(--color-on-background);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.01em;
}

#app {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  background-color: var(--color-surface);
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-overlay);
}

.text-primary { color: var(--color-primary); }
.text-on-surface { color: var(--color-on-surface); }
.text-on-surface-variant { color: var(--color-on-surface-variant); }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }

.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mt-4 { margin-top: 16px; }

.view {
  flex: 1;
  display: none;
  flex-direction: column;
  padding-bottom: 80px;
  animation: fadeIn 0.3s ease-out;
}
.view.active {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

.top-header {
  padding: 16px var(--spacing-mobile);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card {
  background: var(--color-surface-container-lowest);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--rounded-lg);
  padding: 16px;
  transition: box-shadow 0.2s;
}
.card:hover {
  box-shadow: var(--shadow-hover);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--rounded-base);
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  width: 100%;
}
.btn-primary {
  background-color: var(--color-primary-container);
  color: var(--color-on-primary-container);
}
.btn-primary:active {
  background-color: var(--color-primary);
}
.btn-outline {
  background-color: transparent;
  border: 1px solid var(--color-primary-container);
  color: var(--color-primary-container);
}

.input-group {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
}
.input-group label {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-on-surface);
}
.input-group input {
  padding: 12px;
  border-radius: var(--rounded-base);
  border: 1px solid var(--color-outline-variant);
  font-size: 16px;
  font-family: inherit;
  transition: border-color 0.2s;
}
.input-group input:focus {
  outline: none;
  border-color: var(--color-primary-container);
}

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  margin: 0 auto;
  max-width: 480px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-outline-variant);
  display: flex;
  justify-content: space-around;
  padding: 8px 0;
  z-index: 100;
}
.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-secondary);
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
}
.nav-item.active {
  color: var(--color-primary-container);
}
.nav-item .material-icons-round {
  font-size: 24px;
  margin-bottom: 4px;
}
.nav-item.active::after {
  content: '';
  width: 20px;
  height: 2px;
  background-color: var(--color-primary-container);
  border-radius: 2px;
  margin-top: 2px;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(19, 27, 46, 0.4);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: 24px;
}

.modal-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--color-surface-container-lowest);
  border-radius: var(--rounded-lg);
  padding: 32px 24px;
  width: 100%;
  max-width: 320px;
  text-align: center;
  box-shadow: var(--shadow-overlay);
  transform: translateY(20px) scale(0.95);
  transition: transform 0.3s ease;
}

.modal-overlay.show .modal-content {
  transform: translateY(0) scale(1);
}