:root {
    --bg-color: #ffafd1b6;
    --card-color: #ffffff;
    --text-main: #0f172a;
    --text-muted: #000000;
    --primary: #e772ce;
    --primary-hover: #dd71d8;
    --border: #e2e8f0;
    --danger: #e967a8;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: system-ui, sans-serif; }
body { background-color: var(--bg-color); color: var(--text-main); padding: 2rem 1rem; }
.container { max-width: 1100px; margin: 0 auto; }
.header { text-align: center; margin-bottom: 2.5rem; }
.header p { color: var(--text-muted); margin-top: 0.5rem; }

.grid-layout { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .grid-layout { grid-template-columns: 1fr 1.2fr; } }

.card { background: var(--card-color); border: 1px solid var(--border); border-radius: 12px; padding: 2rem; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); }
.form-group { margin-bottom: 1.5rem; }
label { display: block; font-weight: 600; margin-bottom: 0.5rem; font-size: 0.95rem; }

input[type="number"] {
    width: 100%; padding: 12px; border: 1px solid var(--border); border-radius: 8px;
    font-size: 1rem; outline: none; transition: border-color 0.2s;
}
input input:focus { border-color: var(--primary); }
.form-group.invalid input { border-color: var(--danger); background-color: #fef2f2; }
.error-msg { font-size: 0.75rem; color: var(--danger); margin-top: 0.4rem; display: none; }
.form-group.invalid .error-msg { display: block; }

.btn-submit {
    width: 100%; padding: 14px; background-color: var(--primary); color: white;
    border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer;
    transition: background 0.2s;
}
.btn-submit:hover { background-color: var(--primary-hover); }

/* Caja Resultados */
.result-box { margin-top: 2rem; padding: 1.5rem; background: var(--bg-color); border-radius: 8px; text-align: center; }
.result-box.hidden { display: none; }
.score-num { font-size: 3.5rem; font-weight: 800; color: var(--primary); margin: 0.5rem 0; }
.badge { display: inline-block; padding: 5px 16px; font-size: 0.85rem; font-weight: 700; border-radius: 20px; text-transform: uppercase; }

.b-bajo { background-color: #e0f2fe; color: #0369a1; }
.b-normal { background-color: #d1fae5; color: #065f46; }
.b-sobre { background-color: #fef3c7; color: #92400e; }
.b-obeso { background-color: #ffe4e6; color: #991b1b; }

/* Tablas */
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; text-align: left; }
th, td { padding: 12px; border-bottom: 1px solid var(--border); }
th { background: #f8fafc; color: var(--text-muted); font-weight: 600; }
.btn-del { background: none; border: none; color: var(--danger); font-weight: 600; cursor: pointer; }
.empty-state { text-align: center; padding: 3rem 0; color: var(--text-muted); font-style: italic; }

/* Toast */
.toast-alert {
    position: fixed; bottom: 20px; right: 20px; background: #1e293b; color: white;
    padding: 12px 24px; border-radius: 6px; font-size: 0.9rem; opacity: 0;
    transform: translateY(20px); transition: all 0.3s ease; pointer-events: none;
}
.toast-alert.show { opacity: 1; transform: translateY(0); }