:root {
    /* MODO OSCURO (Por defecto) */
    --bg-color: #121214;
    --card-bg: #1c1c1e;
    --text-main: #ffffff;
    --text-muted: #8e8e93;
    --border-color: #2c2c2e;
    --primary: #007aff;
    --primary-hover: #0a84ff;
    --danger: #ff453a;
    --danger-bg: rgba(255, 69, 58, 0.1);
    --border-radius: 16px;
}

[data-theme="light"] {
    /* MODO CLARO */
    --bg-color: #f2f2f7;
    --card-bg: #ffffff;
    --text-main: #000000;
    --text-muted: #6c6c70;
    --border-color: #e5e5ea;
    --primary: #007aff;
    --primary-hover: #0056b3;
    --danger: #ff3b30;
    --danger-bg: rgba(255, 59, 48, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

/* Pantallas contenedoras */
.screen {
    display: none;
    width: 100%;
    padding: 20px;
    margin: 0 auto;
}

.screen.active {
    display: block;
}

/* DISEÑO RESPONSIVE PARA EL LOGIN */
#login-screen {
    max-width: 400px;
    margin-top: 10vh;
}

.login-container {
    background-color: var(--card-bg);
    padding: 32px 24px;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
}

/* --- INTERFAZ ADAPTATIVA DEL DASHBOARD --- */
#dashboard-screen {
    max-width: 1200px; /* Ancho máximo para ordenadores */
    width: 100%;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* Botones universales refinados */
.btn-theme, .btn-logout {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 10px 14px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* LA REGLA MÁGICA: Rejilla que cambia según la pantalla */
.dashboard-layout {
    display: grid;
    grid-template-columns: 1fr; /* Una columna en móvil */
    gap: 24px;
}

/* SECCIONES MULTIPROPÓSITO */
.section-container {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.02);
}

.section-container h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 18px;
}

/* Cuadrícula de constantes vitales */
.biomed-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 18px;
}

.biomed-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 16px 10px;
    text-align: center;
}

.biomed-card.alert-warm {
    border-color: var(--danger);
    background-color: var(--danger-bg);
}

.biomed-card input {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 22px;
    font-weight: 700;
    text-align: center;
    outline: none;
    margin-top: 6px;
}

/* Elementos del Login */
.input-group { margin-bottom: 20px; }
.input-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 8px; color: var(--text-muted); }
.password-wrapper { position: relative; width: 100%; }
.input-group input { width: 100%; background-color: var(--bg-color); border: 2px solid var(--border-color); border-radius: 10px; padding: 14px; color: var(--text-main); font-size: 16px; outline: none; }
.password-wrapper input { padding-right: 50px; }
.toggle-password { position: absolute; right: 14px; top: 30%; background: none; border: none; font-size: 20px; cursor: pointer; }
.btn-primary { width: 100%; background-color: var(--primary); color: white; border: none; border-radius: 12px; padding: 16px; font-size: 16px; font-weight: 600; cursor: pointer; }
.btn-secondary { width: 100%; background-color: var(--primary); color: white; border: none; border-radius: 12px; padding: 14px; font-size: 14px; font-weight: 600; cursor: pointer; }
.emergency-zone { margin-top: 30px; border-top: 1px solid var(--border-color); padding-top: 20px; text-align: center; }
.btn-emergency { width: 100%; background: transparent; color: var(--danger); border: 2px solid var(--danger); border-radius: 12px; padding: 12px; font-weight: 600; cursor: pointer; }

/* 🖥️ CAMBIO DE COMPORTAMIENTO PARA ORDENADORES GRANDES */
@media (min-width: 768px) {
    .dashboard-layout {
        grid-template-columns: 450px 1fr; /* Constantes a la izquierda, Medicinas a la derecha */
    }
}