/* Variables y estilos base compartidos */
:root {
  --bg: #fef7f7;
  --card: #ffffff;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --border: #e8e8e8;
  --accent: #1a1a1a;
  --protein: #e53935;
  --carbs: #f57c00;
  --fats: #42a5f5;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --safe-bottom: env(safe-area-inset-bottom, 0);
}

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

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  max-width: 600px;
  margin: 0 auto;
}

/* Botones (diseño unificado) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px 20px;
  margin-top: 20px;
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: transform 0.1s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn:hover {
  background: #333;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}
.btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn-ghost {
  background: var(--card);
  color: var(--text-muted);
  border: 2px solid var(--border);
  box-shadow: none;
}
.btn-ghost:hover:not(:disabled) {
  background: #f5f5f5;
  color: var(--text);
  border-color: var(--text-muted);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  box-shadow: none;
}
.btn-outline:hover:not(:disabled) {
  background: rgba(76, 175, 80, 0.08);
  color: var(--accent);
}

.btn-danger {
  background: #c62828;
  color: #fff;
}
.btn-danger:hover:not(:disabled) {
  background: #b71c1c;
  color: #fff;
}

.btn-danger:focus-visible {
  outline: 2px solid #c62828;
  outline-offset: 2px;
}

/* Campos de formulario (diseño unificado) */
.form-group {
  margin-bottom: 16px;
}
.form-group:last-of-type {
  margin-bottom: 0;
}
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea,
.add-food-form textarea,
.food-edit-form input,
.food-edit-form select {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  font-family: inherit;
  color: var(--text);
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  -webkit-appearance: none;
  appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder,
.add-food-form textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.8;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.add-food-form textarea:focus,
.food-edit-form input:focus,
.food-edit-form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(26, 26, 26, 0.08);
}
.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover,
.add-food-form textarea:hover {
  border-color: #d0d0d0;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b6b6b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}
.form-group textarea,
.add-food-form textarea {
  resize: vertical;
  min-height: 88px;
}

/* Campo solo lectura (ej. email en perfil) */
.email-readonly {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  font-family: inherit;
  background: #f5f5f5;
  color: var(--text-muted);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: default;
}
.form-group input:disabled,
.form-group select:disabled {
  background: #f5f5f5;
  color: var(--text-muted);
  border-color: var(--border);
  cursor: default;
}

/* Número sin flechas en navegadores que lo permiten */
.form-group input[type="number"],
.food-edit-form input[type="number"] {
  -moz-appearance: textfield;
}
.form-group input[type="number"]::-webkit-outer-spin-button,
.form-group input[type="number"]::-webkit-inner-spin-button,
.food-edit-form input[type="number"]::-webkit-outer-spin-button,
.food-edit-form input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}