:root {
  /* Tokens de Diseño Core */
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --ease: cubic-bezier(.4, 0, .2, 1);
  --spring: cubic-bezier(.34, 1.56, .64, 1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);

  /* Light Mode Tokens */
  --bg-base: #f5f5f7;
  --glass-surface: rgba(255, 255, 255, 0.62);
  --glass-border: rgba(255, 255, 255, 0.45);
  --text-main: #1c1c1e;
  --text-sec: #636366;
  --input-bg: rgba(118, 118, 128, 0.08);
  
  --color-success: #30d158;
  --color-info: #007aff;
  --color-warning: #ff9f0a;
  --color-danger: #ff3b30;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Dark Mode Tokens */
    --bg-base: #0a0a0f;
    --glass-surface: rgba(31, 31, 31, 0.75);
    --glass-border: rgba(255, 255, 255, 0.08);
    --text-main: #f2f2f7;
    --text-sec: #aeaeb2;
    --input-bg: rgba(118, 118, 128, 0.20);
    --color-info: #0a84ff;
    --color-warning: #ffd60a;
    --color-danger: #ff453a;
  }
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-base);
  background-image: radial-gradient(circle at 50% 0%, rgba(0, 122, 255, 0.04) 0%, transparent 70%);
  background-attachment: fixed;
  color: var(--text-main);
  overscroll-behavior-y: contain;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  padding: env(safe-area-inset-top) 16px calc(100px + env(safe-area-inset-bottom)) 16px;
}

.metrics { font-family: 'JetBrains Mono', monospace; }

/* Header Component */
.header-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin: 24px 0 16px;
}

h1 { font-weight: 700; font-size: 1.8rem; letter-spacing: -0.5px; margin: 0; }
h2 { font-weight: 600; margin: 0; font-size: 1.3rem; letter-spacing: -0.2px; }

.view-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 24px 0 14px;
}

.week-badge {
  background: var(--input-bg);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-info);
  border: 1px solid var(--glass-border);
  margin-top: 4px;
  display: inline-block;
}

/* User Avatar */
.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--glass-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.1rem;
  cursor: pointer;
  transition: transform 0.3s var(--spring);
}
.user-avatar:active { transform: scale(0.90); }

/* Tab System */
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Tools Utility Block */
.tools-card {
  padding: 12px 16px;
  margin-bottom: 16px;
  display: flex;
  gap: 12px;
  align-items: center;
}

/* Glass Card Architecture */
.glass-card {
  background: var(--glass-surface);
  backdrop-filter: blur(30px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  border-radius: var(--radius-md);
  border-top: 1px solid var(--glass-border);
  border-left: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  padding: 16px;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.item-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--glass-border);
  transition: opacity 0.2s ease;
}
.item-row:last-child { border-bottom: none; padding-bottom: 0; }
.item-row.interactive-row:active { opacity: 0.6; }

.item-info { display: flex; align-items: center; gap: 12px; }
.item-emoji { font-size: 1.4rem; }
.item-title { font-size: 0.95rem; font-weight: 500; }
.item-cycle { font-size: 0.78rem; color: var(--text-sec); display: flex; gap: 6px; align-items: center; margin-top: 2px;}

.user-tag {
  background: var(--input-bg);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-main);
  border: 1px solid var(--glass-border);
}

.item-price { font-weight: 700; color: var(--color-success); font-size: 0.95rem; }

/* Sub-list Row Item (Mover Rápido) */
.sub-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 4px;
  border-bottom: 1px solid rgba(120,120,120,0.1);
  font-size: 0.88rem;
}
.sub-list-item:last-child { border-bottom: none; }

/* Floating Bottom Bar Navigation */
.bottom-bar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 500px;
  margin-bottom: calc(16px + env(safe-area-inset-bottom));
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom)) 16px;
  backdrop-filter: blur(30px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  background: var(--glass-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-sec);
  font-size: 0.7rem;
  font-weight: 500;
  flex: 1;
  transition: transform 0.3s var(--spring), color 0.2s ease;
  cursor: pointer;
}
.nav-item.active { color: var(--color-info); font-weight: 600; }
.nav-item:active { transform: scale(0.90); }
.nav-icon { font-size: 1.3rem; }

/* Modals & Sheets */
.modal-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s var(--ease);
  z-index: 999;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }

.bottom-sheet {
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--glass-surface);
  backdrop-filter: blur(40px) saturate(200%);
  -webkit-backdrop-filter: blur(40px) saturate(200%);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  border-top: 1px solid var(--glass-border);
  padding: 24px 24px calc(24px + env(safe-area-inset-bottom));
  transform: translateY(100%);
  transition: transform 0.4s var(--spring);
  z-index: 1000;
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  margin: 0 auto;
}
.bottom-sheet.active { transform: translateY(0); }

.sheet-handle {
  width: 36px; height: 5px;
  background: var(--text-sec); opacity: 0.25;
  border-radius: 10px; margin: 0 auto 20px;
}

/* Forms Elements */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.82rem; color: var(--text-sec); margin-bottom: 6px; font-weight: 500; }

.input-field {
  width: 100%;
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: var(--input-bg);
  color: var(--text-main);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.input-field:focus { border-color: var(--color-info); background: var(--glass-surface); }

/* Buttons UI Layout */
.btn {
  width: 100%; padding: 14px;
  background: var(--color-info); color: #fff;
  border: none; border-radius: var(--radius-sm);
  font-size: 0.95rem; font-weight: 600; font-family: 'Inter';
  transition: transform 0.2s var(--spring);
  margin-top: 8px;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.12);
}
.btn:active { transform: scale(0.96); }

.btn-secondary {
  background: var(--input-bg);
  color: var(--color-info);
  border: 1px solid var(--glass-border);
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: transform 0.2s ease;
}
.btn-secondary:active { transform: scale(0.95); }

.btn-profile {
  background: var(--input-bg);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
  text-align: left;
  padding-left: 20px;
  box-shadow: none;
  margin-top: 0;
}
.btn-profile:active { background: rgba(0, 122, 255, 0.08); border-color: var(--color-info); }

/* List Items / Badges for Management */
.category-row-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  background: var(--input-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
}
.category-row-item:active { background: rgba(0,0,0,0.04); }

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-sec);
  font-size: 0.92rem;
}